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Synchysite

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Synchysite-(Ce)
Petersberg Quarry, Petersberg, Halle, Saxony-Anhalt, Germany
© 2008 Dominik Schläfli

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Name:	From the Greek σύγχΰσις "synchys" for "confounding" in allusion to its initially being mistaken for parisite.
Synonym of:	Synchysite-(Ce), Synchysite-(Nd), Synchysite-(Y)

The name applied to what was believed to be the cerium-dominant species (see Palache et al., Dana 7th ed., vol. II, 287), but was later determined to be Synchysite-(Y).
The very rare neodymium analogue Synchysite-(Nd) was approved in the late 1970s.
The cerium analogue Synchysite-(Ce) was not submitted until 1982 (IMA1982-030).

See also Synchysite Group.

Classification of Synchysite

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Other Names for Synchysite

Synonyms:

Synchisite

Other Languages:

German:	Synchysit Synchisit Synkysit
Simplified Chinese:	氟碳钙铈矿
Spanish:	Synchisita Synchysita

Other Information

Health Warning:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Synchysite

Reference List:

- +

Nordenskiöld (1894) Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm: 16: 338 (as Parisite).

Flink (1901) University of Upsala, Geological Institution, Bulletin: 5: 81 (Synchisite).

Flink (1901) Meddelelser om Grønland: 24: 29.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 287-289 (as Synchisite).

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Localities for Synchysite

The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

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(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.


Angola
Huambo Province Bailundo City Council Bailundo	[Synchysite-(Y)] Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Ekunda City Council Coola	[Synchysite-(Y)] Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Longonjo City Council Mt Chibilundo	[Synchysite-(Y)] Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Huíla Province Lubango City Council Mt Bonga	[Synchysite-(Y)] Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Namibe Province Tombwa City Council Virulundo	[Synchysite-(Y)] Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.

Australia
New South Wales Yancowinna Co. Broken Hill	[Synchysite-(Ce)] Birch, W. D. & Pring, A. (1987): A note on synchysite-(Ce) from Broken Hill, New South Wales. Australian Mineral. 2 (2), 13-15; Birch BH Book
South Australia Andamooka Ranges - Lake Torrens area Roxby Downs Olympic Dam Mine	[Synchysite-(Ce)] Lottermoser B. G. (1995). Neues.Jb. Miner. Mh.1995, 8, 371-384
Olary Province Yunta Paratoo copper mine	[Synchysite-(Ce)] Brugger, J., Ogierman, J., Pring, A., Waldron, H., Kolitsch, U. (2006): Origin of the secondary REE-minerals at the Paratoo copper deposit near Yunta, South Australia. Mineralogical Magazine, 70, 609-627.

Austria
Carinthia Gurktaler Alpen Mts St Veit an der Glan Äußere Wimitz No. 1 adit	[Synchysite-(Ce)] G. Blass, A. Pichler: Carinthia II 191./111.: 43-55 (2001)
Hohe Tauern Mts Ankogel group Kleinelend valley Kleinelend glacier	[Synchysite-(Ce)] G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
Goldberg group Tauern valley Stockerhütte - Jamnighütte area	[Synchysite-(Ce)] G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
Stocker Alp	Natural History Museum Vienna collection
Millstatt lake ridge Fresach Laas Feldspar quarry	[Synchysite-(Ce)] G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
Lower Austria Waldviertel Horn Maissau Limberg Gänsgraben Granite quarries	[Synchysite-(Ce)] R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
Salzburg Hohe Tauern Mts Gastein valley Böckstein Moos	[Synchysite-(Y)] A. Strasser: Die Minerale Salzburgs, 1989
Stuhlwald Anderl cleft	A. Strasser: Die Minerale Salzburgs, 1989
Naßfeld valley Bärenfall dam	A. Strasser: Die Minerale Salzburgs, 1989
Gewerkenwald	A. Strasser: Die Minerale Salzburgs, 1989
Road cuts	A. Strasser: Die Minerale Salzburgs, 1989
Sportgastein Power station	[Synchysite-(Y)] SCHEBESTA, K. (2007): Mineralfunde auf den Deponien des Kraftwerkbaues im hinteren Gasteinertal (Sportgastein). Mineralog. Arch. Salzb. 12: 257-258.
Siglitz - Bockhart area Bockhart reservoir (Pochkar reservoir)	A. Strasser: Die Minerale Salzburgs, 1989
Weissen valley Schafbühel	A. Strasser: Die Minerale Salzburgs, 1989
Habach valley Wiesbachrinne	A. Strasser: Die Minerale Salzburgs (1989)
Obersulzbach valley Hopffeld area Hopffeldboden	[Synchysite-(Ce)] A. Strasser: Die Minerale Salzburgs (1989)
Neuberg	[Synchysite-(Ce)] Natural History Museum Vienna collection
Rauris valley Hüttwinkl valley Kaiserer quarry (Deisl quarry)	[Synchysite-(Ce)] A. Strasser: Die Minerale Salzburgs (1989)
Lohning quarry (Lohninger quarry)	[Synchysite-(Ce)] A. Strasser: Die Minerale Salzburgs (1989)
Seidlwinkl valley Wustkogel Mt.	[Synchysite-(Ce)] A. Strasser: Die Minerale Salzburgs (1989)
Untersulzbach valley Ascham Alp - Breitfuß Mt. - Sonntagskopf Mt. area Ascham Alp bridge	A. Strasser: Die Minerale Salzburgs (1989)
Mitterkopf Mt. (east slope)	A. Strasser: Die Minerale Salzburgs (1989)
Notklamm gorge	A. Strasser: Die Minerale Salzburgs (1989)
Lungau Murwinkel Rotgülden Haderlingspitze Mt Muritzenkar	[Synchysite-(Ce)] Walter, F. (2010): 1647) Monazit-(Ce), Synchisit-(Ce), Vanadinit, Wulfenit und Xenotim-(Y) vom Haderlingspitz, Muritzenkar, Lungau, Salzburg. P. 234-235 in Niedermayr et al. (2010): Neue Mineralfunde aus Österreich LIX. Carinthia II, 200./120., 199-260.
Schellgaden Gestellsteinbruch (Ofensteinbruch)	C. Auer: Lapis 20(11):11-20 (1995)
Talc mine	A. Strasser: Die Minerale Salzburgs (1989)
Styria Koralpe Mts Deutschlandsberg Leibenfeld Railway exploration tunnel	[Synchysite-(Ce)] Postl, W. et al. (2007)
Tyrol North Tyrol Ziller valley Zamser Grund (Zams valley) Schrammacher Mt. Oberschrammach glacier	[Synchysite-(Ce)] Folie, K., Rocchetti, I. (1999): Novità Mineralogiche del Passo di Vizze. Rivista Mineralogica Italiana, 4/1999, 222-230.
Stampfl glacier	[Synchysite-(Ce)] R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)

Bolivia
Cochabamba Department Ayopaya Province Chiarake (Chiaracke; Chiaraque) ?	Schultz, F., et al. (2004) Contrib. Mineral. Petrol., 148, 391-408.

Brazil
Pará Carajás mineral province Canaã dos Carajás Alvo 118 Cu-Au deposit (Cento e Dezoito deposit)	[Synchysite-(Y)] Grainger, C.J., Groves, D.I., Tallarico, F.H.B., and Fletcher, I.R. (2008): Ore Geology Reviews 33, 451-489.
Santa Catarina Lages
São Paulo Itapirapuã Barra do Itapirapuã	[Synchysite-(Y)] Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.

Canada
Northwest Territories Yellowknife Thor Lake Nechalacho deposit	[Synchysite-(Ce)] Sheard, E.R. (2010)
Ontario Thunder Bay District Marathon Chipman Lake carbonatite	[Synchysite-(Ce)] Platt & Wooley (1990)
Coldwell complex	[Synchysite-(Ce)] Mitchell (1991)
Québec Laurentides Deux-Montagnes RCM Oka Oka complex	[Synchysite-(Ce)] Gold (1969)
Montérégie Lajemmerais RCM Varennes & St-Amable Saint-Amable sill Demix-Varennes quarry	[Synchysite-(Ce)] Mineralogical Record: 29: 83.
Rouville RCM Mont Saint-Hilaire Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry)	[Synchysite-(Ce)] Cheang, K.K. (1977), Structure and polytypism of synchisite and parisite from Mont St. Hilaire, Quebec. M. Sc. Thesis, Carleton University, Ottawa, Canada.
Montréal Francon quarry	[Synchysite-(Ce)] Mineralogical Record (2006): 37: 5-60.
Outaouais Les Collines-de-l'Outaouais RCM Val-des-Monts Lac Saint-Pierre (Wakefield Lake) Evans-Lou Mine	[Synchysite-(Y)] Hogarth, D.D., Chao, G.Y., Plant. G.A. & Steacy, H. R. (1974): Caysichite, a new silico-carbonate of yttrium and calcium. Canadian Mineralogist.12: 293-298
Saguenay-Lac-Saint-Jean Le Fjord-du-Saguenay RCM Saint-Honoré Saint-Honoré carbonatite complex	[Synchysite-(Ce)] Fournier, A. (1993)

China
Inner Mongolia Autonomous Region Hinggan League (Xing'an Prefecture) Jarud Banner (Zalute Co.) Baerzhe REE deposit	Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189
Jiangxi Province Ganzhou Prefecture Dayu Co. Xihuashan intrusion	[Synchysite-(Y)] Rucheng Wang, Fontan, F., Xiaoming Chen, Huan Hu, Changshi Liu, Shijin Xu, and de Parseval, P. (2003): Canadian Mineralogist 41, 727-748.
Longnan Co. Longnan REE deposits	[Synchysite-(Y)] Zhiwei Bao and Zhenhua Zhao (2008): Ore Geology Reviews 33, 519-535.
Zudong Mine	[Synchysite-(Y)] Deqian Chen, Daoling Yin, Jianxiong Zhou, Xingyuan Lin, Hanqing Zhang and Nicheng Shi (1994): Geological Review 59(1), 82-86
Xunwu Co. Heling REE deposit	[Synchysite-(Y)] Zhiwei Bao and Zhenhua Zhao (2008): Ore Geology Reviews 33, 519-535.
Sichuan Province Liangshan Autonomous Prefecture Mianning Co. Maoniuping REE deposit	Yang, Z., Smith, M.P., Henderson, P., Le Bas, M.J., Tao, K., and Zhang, P. (2000): Neues Jahrbuch für Mineralogie Monatshefte, ?(10), 466-480.

Czech Republic
Bohemia (Böhmen; Boehmen) Karlovy Vary Region Krušné Hory Mts (Erzgebirge) Jáchymov (St Joachimsthal) District Jáchymov (St Joachimsthal)	[Synchysite-(Ce)] Lapis 2002(7/8), 63-65
Liberec Region North Bohemian Uranium District	[Synchysite-(Ce)] Scharm, B.: Přehled minerálů nalezených v oblasti uranových koncentrací v severočeské křídě. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1995, roč. 3, s. 169-172.
Ústí Region Česká Lípa (Böhmisch Leipa) Stráž (Wartenberg) Holičky deposit	[Synchysite-(Nd)] No reference listed
Moravia (Mähren; Maehren) Olomouc Region Prostějov area Drahany Uplands	[Synchysite-(Ce)] Škoda R., Čopjakova R. 2006: Authigenic REE mineralsfrom greywackes of the Drahany Uplands, Czech Republic and their significance for diagenetic processes. Mineralogia Polonica, vol. 28, 208-210

Finland
Länsi-Suomen Lääni Kangasala Pyörönmaa pegmatite	[Synchysite-(Nd)] Vorma et al 1966 Bulletin de la Commission Geologique de Finlande 222

France
Midi-Pyrénées Ariège Luzenac Trimouns Talc Mine	[Synchysite-(Ce)] [Le Cahier des Micromonteurs 1990, 4, p.3,8-12]
Tarn Réalmont Peyrebrune Rivet quarry	[Synchysite-(Ce)] Bernadi G. (2004), Quelques nouvelles de Peyrebrune (Tarn), Le Cahier des Micromonteurs, n°86, pp 13-18
Provence-Alpes-Côte d'Azur Alpes-Maritimes Saint-Martin-Vésubie Le Boréon Madone des Fenestres Valley	Self collected by S. MAURY
Hautes-Alpes Lautaret pass area La Grave Villar d'Arène Pointe Gravelotte	[Synchysite-(Ce)] Designolle J-L. (1997), L'Alpe du Villar d'Arène (Hautes-Alpes), Le Cahier des Micromonteurs, n°2, pp: 23-30
Rhône-Alpes Haute-Savoie Chamonix Mt Blanc Massif L'A Neuve glacier	[Synchysite-(Ce)] Cuchet, S., Schnyder, C. & Meisser, N. (2003): Les minéraux de L'A Neuve. Schweizer Strahler / Le Cristallier Suisse, Nr. 3, 28-37.
Isère Bourg d'Oisans St Christophe-en-Oisans Plan-du-Lac	Valverde J., De Ascencao Guedes R. (1999), Le Plan du Lac, Isère (France), Le Cahier des Micromonteurs, n°2, pp: 6-21
Savoie La Lauzière massif Entre Deux Roches	DE ASCENCAO GUEDES R.. (2000). La Lauzière : les espèces minérales, Savoie, France. Le Règne Minéral hors-série n°6, pp. 24-39. Editions du Piat.
Grand Pic	[Synchysite-(Ce)] DE ASCENCAO GUEDES R.. (2000). La Lauzière : les espèces minérales, Savoie, France. Le Règne Minéral hors-série n°6, pp. 24-39. Editions du Piat.
Tarentaise valley Bourg-St Maurice Les Arcs Peisey-Nancroix Grande Glière	[Synchysite-(Ce)] De Ascencão Guedes R., Guichon F. & Meisser N. (2004). La synchisite-(Ce) de la Grande-Glière, Peisey-Nancroix (Savoie). Le Cahier des Micromonteurs, n°86, p 27
Ruitor massif Sainte-Foy Invernet glacier	De Ascencao Guedes R. et al. (2003), Découverte de kainosite-(Y) au glacier de l'Invernet, Sainte-Foy, Haute-Tarentaise, Savoie, Le Règne Minéral, n°54, pp: 11-17

Germany
Baden-Württemberg Black Forest Alpirsbach Reinerzau District Holderbusch Adit	[Synchysite-(Ce)] K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
Gengenbach Haigerach valley Silberbrünnle Mine	[Synchysite-(Ce)] Wittern,A. (1995) Mineralien finden im Schwarzwald
Haslach Steinach Artenberg quarry	[Synchysite-(Ce)] [Wittern,A. (1995) Mineralien finden im Schwarzwald]
Schauinsland Pb-Zn mining district	[Synchysite-(Ce)] K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
Schenkenzell Wittichen Burgfelsen Johann Mine	[Synchysite-(Ce)] K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
Todtnau Baumhalde Mine ?	[Synchysite-(Ce)] Lapis 21(12), 44 (1996)
Waldshut Detzeln Porphyry quarry	[Synchysite-(Ce)] Hess, E., Graeser, S. & Gabriel, W. (2011): Das Porphyrwerk Detzeln im Steinatal und seine Mineralien. Lapis 36 (4), 25-35; 54.
Wolfach Oberwolfach Rankach valley Clara Mine	[Synchysite-(Ce)] Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German); KOLITSCH, U., GRAF, H. W. & BLAß, G. (1997): Untersuchungen über die Seltenerden-Carbonate Bastnäsit und Synchisit von der Grube Clara im Schwarzwald: Nachweis von Bastnäsit-(Ce), Bastnäsit-(Nd), Bastnäsit-(La) und Synchisit-(Ce). - Aufschluss 48, 367-79.
Bavaria Franconia Fichtelgebirge Marktredwitz Dechantsees Kalkhaus Quarry	[Synchysite-(Ce)] Meier, S. (1985): Synchisit aus dem Steinbruch bei Dechantsees/Fichtelgebirge. Lapis, 10 (11), 38-39; Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
Lower Saxony Harz Mts Clausthal-Zellerfeld Bad Grund Wiemannsbucht Hilfe Gottes Mine	[Synchysite-(Y)] Haack, U., Schnorrer-Koehler, G. & Lueders, V. (1987): Seltenerd-Minerale aus hydrothermalen Gängen des Harzes. Chemie der Erde 47, 41-45 (in German).
Saxony-Anhalt Haldensleben Flechtingen heights Flechtingen Holzmühlental quarry	[Synchysite-(Ce)] Witzke, T. & Jacob, G. (1995) Zeitschrift für Geologische Wissenschaften 23, 443-448
Halle Petersberg Goethe Quarry	[Synchysite-(Ce)] Wittern: "Mineralfundorte in Deutschland", 2001
Petersberg Quarry	[Synchysite-(Ce)] Wittern: "Mineralfundorte in Deutschland", 2001; Hajek, W. & Gröbner, J. (2007): Allanit, Anatas und Brookit vom Petersberg bei Halle. Lapis 32 (6), 53-57; Jahn, S. (2007): Der Petersberg bei Halle a. d. Saale. Mineralien-Welt 18(6), 16-41.
Saxony Erzgebirge Freiberg District Niederbobritzsch	[Synchysite-(Ce)] Canadian Mineralogist: 38: 67-80.

Greenland
Kitaa (West Greenland) Province Narsaq Igaliku (Igaliko) Narssârssuk (Narsarsuk) Narssârssuk pegmatite (Narsarsuk pegmatite)	[Synchysite-(Ce)] Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 286, 288, 292; American Mineralogist (1953): 38: 932; Lapis (2001): 3: 8.
Ilimaussaq complex	[Synchysite-(Ce)] Soerensen, H. (2001): The Ilimaussaq alkaline complex, South Greenland: status of mineralogical research with new results, Geology of Greenland Survey Bulletin 190, GEUS

Hungary
Baranya Co. Mecsek Mts. Komló Coal Mine (Deep level)	[Synchysite-(Ce)] Szakáll, S., Nagy, G. és Sajó, I. (2003): Synchysite-(Ce) from the Komló coal deposit, Mecsek Mts., South Hungary. Acta Mineral.-Petrogr., Abstr. Ser. 1, p. 100.

Italy
Aosta Valley Courmayeur Les Grandes Jorasses Massif Ferret Valley Triolet Glacier	[Synchysite-(Ce)] Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): MInerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Monte Bianco Massif Veny Valley Miage Glacier	[Synchysite-(Ce)] Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Liguria Genova Province Ne Graveglia Valley	[Synchysite-(Ce)] [MinRec 32:360]
Reppia Valgraveglia Mine (Gambatesa Mine)	[Synchysite-(Ce)] Camarda, S. (2006): Sinchisite-(Ce) "micro-estetica" della miniera di Gambatesa. Prie, 2, 37-38.
Lombardy Varese Province Ceresio Valley Cuasso al Monte	[Synchysite-(Y)]
Laghetto Quarry	[Synchysite-(Ce)] Collection of Barry Murphy, Micromount specimen catalogue number 00876
Puricelli quarry	[Synchysite-(Ce)] Domenico Preite collection
Piedmont Biella Province Curino Cacciano Mine	[Synchysite-(Ce)] Martini, B., Salvetti, A., Della Fontana, G., Boscardin, M., Ciriotti, M.E., Ambrino, P. (2010): Primo ritrovamento nel Biellese di synchysite-(Ce). Micro (UK report) 1/2010, 145-149
Cuneo Province Bagnolo Piemonte Ortieul Montoso Quarries	[Synchysite-(Ce)] Piccoli, G. C., Maletto, G., Bosio, P., & Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo F. Eusebio - Alba, 607 pag.
Gesso Valley Argentera massif	Piccoli, G. C., & Lombardo, B. (2004). Il massiccio cristallino dell'Argentera. Rivista Mineralogica Italiana, 28 (1): 6-23
Entracque Cotella Valley	[Synchysite-(Ce)] Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Stura Valley Sambuco	[Synchysite-(Ce)] Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Vinadio Ruà mine	[Synchysite-(Ce)] Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Torino Province Luserna San Giovanni Luserna Valley Quarries	[Synchysite-(Ce)] - Finello, G., Ambrino, P., Kolitsch, U., Ciriotti, M.E., Blaß, G., Bracco, R. (2007): I minerali della “Pietra di Luserna”, Piemonte, Italia nord-occidentale. I. Alcune cave di gneiss della Val Luserna. Micro (località), 2/2007, 181-226.; - Finello, G., Ambrino, P., Kolitsch, U., Ciriotti, M.E., Blaß, G., Bracco, R. (2007): I minerali della “Pietra di Luserna”, Piemonte, Italia nord-occidentale. I. Alcune cave di gneiss della Val Luserna. Micro (località), 2/2007, 181-226.
Susa Valley Meana di Susa Rodetti	[Synchysite-(Ce)] Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Verbano-Cusio-Ossola Province Mergozzo Mont'Orfano	[Synchysite-(Ce)] Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Ossola Valley Baceno Devero Alp (Devero Valley; Val Devero) Mount Cervandone	[Synchysite-(Ce)] Lapis, 20 (7/8), 41-64+76.
Pizzo Bandiera	[Synchysite-(Ce)]
Punta della Rossa	[Synchysite-(Ce)] Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Beura-Cardezza Beura Quarries	[Synchysite-(Ce)] Huen, E., Gramaccioli, C.M. (1969): Sulla sinchisite di Beura (Ossola). Natura, LX, 3, 193-194.
Villadossola Pianasca Quarry	[Synchysite-(Ce)] Rivista Mineralogica Italiana, 2 157-170.
Sardinia Medio Campidano Province Gonnosfanadiga Perda de Pibera Mine	[Synchysite-(Ce)] Stara, P., Rizzo, R., Tanca, G.A. (1996): Iglesiente e Arburese. Miniere e Minerali. Edito a cura dell'EMSA e "varie associazioni mineralogiche", Volume 2°, 192 pp.
Trentino-Alto Adige Bolzano Province (South Tyrol) Vizze Valley (Pfitsch Valley) Griesferner glacier	[Synchysite-(Ce)] collection Manuele Moro
San Giacomo Vizze pass (Pfitsch pass) Arzwände	[Synchysite-(Ce)] Folie, K., P. Gentile, M. Hanke & I. Rocchetti (2010): Mineralien aus der Umgebung des Pfitscher Jochs in Südtirol (II). Mineralien-Welt 21 (4), 42-67.
Grießscharte (Grießferner)	[Synchysite-(Ce)] Folie, K., P. Gentile, M. Hanke & I. Rocchetti (2010): Mineralien aus der Umgebung des Pfitscher Jochs in Südtirol (II). Mineralien-Welt 21 (4), 42-67.
Rinnerlahner	[Synchysite-(Ce)] Folie, K., P. Gentile, M. Hanke & I. Rocchetti (2010): Mineralien aus der Umgebung des Pfitscher Jochs in Südtirol (II). Mineralien-Welt 21 (4), 42-67.
Wasserfallköpfe	[Synchysite-(Ce)] Buscaroli, C., Del Pozzo, C., e Tosato, F. (1994): La fergusonite della Wasserfallkopfe in Val di Vizze. Rivista Mineralogica Italiana, 4/1994, 337-341
Trento Province Fiemme Valley Predazzo	De Michele, V. (1974). Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol.
Mulazzo Mt.	Ref: Daniele Ravagnani - I giacimenti uraniferi Italiani ed i loro minerali - Gruppo Mineralogico Lombardo-Museo Civico di Storia Naturale di Milano - Milano, 1974, pp. 154-155
Tuscany Livorno Province Elba Island Campo nell'Elba San Piero in Campo Fonte del Prete	[Synchysite-(Ce)] Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp.
Lucca Province Apuan Alps Minucciano Gorfigliano Acqua Bianca valley	[Synchysite-(Ce)] Orlandi P., Dini A., Gemignani E., Pierotti L., Quilici U., Romani U., 2002. Paragenesi alpine nelle Alpi Apuane: I minerali delle vene di quarzo della Valle dell'Acqua Bianca, Gorfigliano (LU) Riv. Mineral. It., 26, 4: 216-223

Japan
Honshu Island Tohoku Region Fukushima Prefecture Kawamata Iizaka (Iisaka) Village Suishoyama pegmatite (Suishouyama; Suisyoyama; Suishyoyama)	[Synchysite-(Y)] Kato, A. (1973) Sakurai Koubutsu Hyohon, 38. (Sakurai collection)
Kyushu Region Fukuoka Prefecture Tagawa-gun Kawasaki Masaki (Mazaki)	[Synchysite-(Ce)] Kitamura & Uehara (2000) Koubutsu-Gakkai Kou'en-Youshi, 102.

Kazakhstan
Karagandy Province (Qaragandy Oblysy; Karaganda Oblast') Kent Massif	[Synchysite-(Ce)]

Kenya
Nyanza Province Buru and Kuge

Kosovo
Klina (Kline) Grebnik Mt.	[Synchysite-(Nd)] Am. Min. (1979), 64, 658; NJMM (1983), 201; Lapis 3 (2001), 8

Kyrgyzstan
Aktyuz REE deposit	[Synchysite-(Ce)] no reference

Malawi
Balaka District Kapiri deposit	[Synchysite-(Y)] Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Chitipa District Songwe Complex
Phalombe District Tundulu Complex	Ngwenya, BT. (1994), Geochimica et Cosmochimica Acta: 58(9): 2061-2072.
Zomba District Mount Malosa	[Synchysite-(Ce)] American Mineralogist, Volume 94, pages 1216–1222, 2009
Nchisi Island (Chilwa Island; Shirwa Island)	Berger, V.I., Singer, D.A., and Orris, G.J. (2009): USGS Open-File Report 09-1139

Mali
Kidal Region Adiounedj	[Synchysite-(Y)] Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.

Mongolia
Dornogovi Aimag Hövsgöl Lugeengol (Lugin Gol; Lugin Gel) REE deposit	[Synchysite-(Ce)] Pavel M. Kartashov data
Gobi Desert Khan Bogdo (Khan-Bogdinskii) Massif	[Synchysite-(Ce)] N.V. Vladykin data
Dorozhnyi pegmatite	[Synchysite-(Ce)] Jindřich Kynický
Hovd Aimag (Khovd Aimag) Altai Mts Khaldzan Buragtag massif	[Synchysite-(Ce)] G.M. Tsareva data; Econ Geol (1995) 90:530-547
Tsakhirin Khuduk Y-Zr-Nb deposit	[Synchysite-(Ce)] Pavel M. Kartashov data

Morocco
Meknès-Tafilalet Region Khénifra Province High Atlas Mts Tamazeght complex Bou-Agrao Mt.	[Synchysite-(Ce)] Khadem Allah, B. (1993)

Namibia
Karas Region Marinkas Quellen (Marinkas Kwela)	[Synchysite-(Y)] Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Otjozondjupa Region Otjiwarongo District Okorusu Mine (Okarusu Mine)	Kogut, A. I., Hagni, R. D. & Schneider, G. I. C. (1998): Geology, mineralogy, and paragenetic sequence of the Okorusu carbonatite-related fluorite ores, Namibia. In: Ed. Hagni, R. D., Proc. 9th Quadrenn. IAGOD Symp., 1994, 555-573.

Norway
Akershus Asker Lake Sandungen ?	[Synchysite-(Ce)] Raade, G. (1969): Contribution to the Mineralogy of Norway, No 40. Cavity minerals from the permian biotite granite at Nedre Eiker Church. Norsk Geologisk Tidskrift 49, 227-239
Buskerud Nedre Eiker Nedre Eiker Church Batteriet	[Synchysite-(Ce)] Raade, G. (1969): Contribution to the Mineralogy of Norway, No 40. Cavity minerals from the permian biotite granite at Nedre Eiker Church. Norsk Geologisk Tidskrift 49, 227-239 + Neumann (1985, p. 100).
Ryggkollen	[Synchysite-(Ce)] Nordrum, F.S. (2001): Noen funn av mineraler i Norge 2000-2001. STEIN 28 (2): 13- 19
Nordland Tysfjord Hundholmen	[Synchysite-(Ce)] Husdal, T. (2008): The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum, skrift 38, 5-28.
Stetind	[Synchysite-(Y)] Husdal, T. (2008): The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum, skrift 38, 5-28.
Oppland Lunner Nordmarka Fjellsjøen	[Synchysite-(Ce)] L. O. Kvamsdal (1998): Mineralene fra Nordmarkitt og Grefsensyenitt i Oslofeltet. AS Merkur-Trykk, Oslo.
Øståsen - Hadeland Surka Midtmoen	[Synchysite-(Ce)] L. O. Kvamsdal (1998): Mineralene fra Nordmarkitt og Grefsensyenitt i Oslofeltet. AS Merkur-Trykk, Oslo(in Norwegian).
Vassbråa	[Synchysite-(Ce)] Werner, R. (1993): Om synchysitt i Norge. STEIN 20 (4),221-226
Sogn og Fjordane Balestrand Fjærland Tunnel	Werner, Ronald (1993): Om synchisitt i Norge. STEIN 20 (4), 221-226
Gaular Sande	[Synchysite-(Ce)] Samuelsen, Helge (1993): Sogn 1992. STEIN 20 (1), 2 + 64-67
Nordfjord Holmøyane	[Synchysite-(Ce)] Werner, Ronald (1993): Om synchisitt i Norge. STEIN 20 (4), 221-226
Svalbard Spitsbergen Hornsund fjord Skoddefjellet	[Synchysite-(Ce)] Pršek, J., Majka, J., Uher, P. & Chudík, P. (2010): Niobium-tantalum minerals in the Skoddefjellet NYF granitic pegmatite, Svalbard Archipelago, Norway: Primary versus secondary assemblage. Neues Jahrbuch für Mineralogie - Abhandlungen 187, 235-248
Telemark Drangedal Tørdal Høydalen (Høydalen seter)	[Synchysite-(Y)] Kristiansen, R. (1998): Høydalen Litium-pegmatitt-Tørdal i Telemark. STEIN 25 (4), 21-30
Nome Fen Complex	[Synchysite-(Ce)] Sverdrup et al. (1967, p. 9); Åmli (1974, p. 45); Neumann, H. (1985): Norges Mineraler. Norges geologiske Undersøkelse Skrifter 68, p. 100).
Vestfold Holmestrand Solumsåsen Quarry	[Synchysite-(Ce)] Larsen, A. O. (1994): Drusemineraler fra Solumsåsen pukkverk, Holmestrand. STEIN 21 (2), 136-141
Sande Skafjellås	[Synchysite-(Ce)] Hermann Fylling

Poland
Lower Silesia (Dolnośląskie) Strzegom-Sobótka Massif	[Synchysite-(Ce)] Mineralogia Polonica Vol. 29, (2), 3-11
Świdnica District Borów (Bohrauseifersdorf)	[Synchysite-(Ce)] JANECZEK J., SZEŁĘG E., 1998: Bastnäsite-(Ce) and synchysite-(Ce) from pegmatite and hydrothermally altered granite of the Strzegom-Sobótka Massif. Miner. Polon., 29 (2), 3-11.
Strzegom (Striegau)	[Synchysite-(Ce)] Körber, T. & Szuszkiewicz, A. (2005): Fundstellen-Klassiker: Der Striegauer Granit und seine Mineralien - Mineralien-Welt 16 (3): 16-45

Russia
Far-Eastern Region Khabarovskiy Kray Aldan province Gornoozerskii (Gornoe Ozero) carbonatite complex	[Synchysite-(Ce)] Pavel M. Kartashov data
Northern Region Murmanskaja Oblast' Kola Peninsula Khibiny Massif Kukisvumchorr Mt Kirovskii apatite mine (Kirovsky Mine; Kirov Mine)	[Synchysite-(Ce)] Lapis 28(12), 46-47 (2003)
Hilairitovoye pegmatite	[Synchysite-(Ce)] Pekov, I. et al (2003): New Data on Minerals: 38: 20-33.
Olenii Creek (Olenii Ruchei; Oleny Ruchei)	[Synchysite-(Ce)] P.M. Kartashov data
Tul'ilukht Bay	[Synchysite-(Ce)]
Southern Siberia Sayan Mts Eastern Sayan Kitoi river	[Synchysite-(Ce)] Savel'eva V.B. Karmanov N.S. (2008) Rare earth's minerals of alkaline metasomatites of Main Sayan Fault zone, - Zapiski RMO, N2, pp.14-35 (in Rus.).; Savel’eva, V.B., and Karmanov, N.S. (2008): Geology of Ore Deposits 50(8), 681-696.
Western-Siberian Region Polar Urals	[Mineralien Welt 6/92:62]
Prepolar Ural Tyumenskaya Oblast' Khanty-Mansi (Khanty Mansiysk) Okrug Saranpaul Puiva (Pouyva) Mount	[Synchysite-(Ce)] [MinRec 30:465]

Slovakia
Banská Bystrica Region Rimavská Sobota Co. Tisovec Rejkovo	[Synchysite-(Ce)] Ondrejka M., Uher P., Pršek J., Ozdín D., Putiš M., 2005: Arsenian monazite-Ce and REE arsenates and carbonates: Composition and substitution in the REEPO4 – REEAsO4 system. Example from Tisovec – Rejkovo thyolite (Western Carpathians, Slovakia). Geophysical Research Abstracts, Vol.7, 04857.
Košice Region Rožňava Co. Gemerská Poloma	[Synchysite-(Ce)] Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Trenčín Region Považská Bystrica Co. Stupné	[Synchysite-(Ce)] Uher, P., Ondrejka, M.: Britolit-(Y): neskoromagmatický akcesorický minerál Y-REE z granitu A-typu v Stupnom při Považskej Bystrici, Pieninské bradlové pásmo (severozápadné Slovensko). Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 2008, vol. 16, 2, 224-229.

South Africa
Limpopo Province Mokopane (Potgietersrus) District Zaaiplaats tin field Zaaiplaats Mine	[Synchysite-(Ce)] Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 258, 288.
Thabazimbi Glenover carbonatite Glenover phosphate mine	[Synchysite-(Ce)] Minerals of South Africa

South Korea
Chungcheongbukdo (Chungchong-pukto) Chungju (Chung Won Kum; Chung-ju) Joongwon-gun Mt. Eorae Chungju deposit	[Synchysite-(Ce)] P.M. Kartashov data

Spain
Andalusia Almería Adra Adra-Motril highway	[Synchysite-(Ce)] Christian Rewitzer collection 2007 / Mineralup magazine; J. Gröbner & U. Kolitsch (SEM-EDS, SXRD & PXRD)
Galicia Pontevedra Porriño Porriño quarries	[Synchysite-(Ce)] Calvo, M., Viñals, J. and Vila, F. (2009) Mineralogy of the pegmatites and miarolitic cavities in the granitic batholit of Porriño, Pontevedra, galicia, Spain. Mineral Up, (2009-1), 6-23

Sweden
Södermanland Nynäshamn Stora Vika	[Synchysite-(Ce)] No reference listed
Västmanland Köping Kolsva	[Synchysite-(Ce)] No reference listed

Switzerland
Aargau Leuggern NAGRA bore	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Bern Hasli Valley Grimsel area	Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 66
Oberaar power station Pressure duct (incl. access galleries)	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 393.
Grischun (Grisons; Graubünden) Calanda Taminser Calanda Goldene Sonne Mine (Fliden Mine)	Die Mineralien der Schweiz, M. Weibel et al., 1990
Lugnez Valley (Lumnezia Valley) Vrin Scharboda Alp	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Medel Valley Cristallina Valley Casatscha Valley Cima della Bianca (north slope)	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Vorderrhein Valley Tujetsch (Tavetsch) Nalps Valley	[Synchysite-(Ce)] Collection Joachim Esche
Piz Blas	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Piz Rondadura	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Ticino (Tessin) Leventina Bedretto Valley Ronco Ronco gallery (Bedretto window; Ronco window)	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 393.
Chiggiogna Gneiss quarries	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Lavorgo	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Lugano lake Carona Madonna d'Ongero	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Riviera Lodrino Iragna	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Uri Urseren Tiefenbach Galenstock Mt.	aufschluss-1971-09-286
Wallis (Valais) Binn Valley Chummibort Hillehorn Mt. (northeast slope)	[Synchysite-(Ce)] Cuchet, S., van der Burgt, A. und Meisser, N. (2005): Chummibort, eine neue Fundstelle für Arsenmineralien im Binntal. Schweizer Strahler, Nr. 2, 19-29. (in German/French)
Geisspfad area Schinhörner Mts	Uwe Kolitsch collection
Kriegalp Valley (Chriegalp Valley) Flesch lake	[Synchysite-(Ce)] van der Burgt, A. & Cuchet, S. (2005): Neu: Gadolinit, Aeschynit und Synchisit vom Fleschsee, Binntal (Schweiz). Lapis 30 (4), 19-27, 50. (in German)
Gischi glacier (incl. Gischihorn Mt.)	[Synchysite-(Ce)]
Wanni glacier - Scherbadung Mt. (Cervandone Mt.) area	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Brig Mörel Betten	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 393.
Goms Fiesch Burg - Fiesch Glacier area Distelgrat	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 393.
Oberwald Furka basis tunnel (west section)	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Ulrichen Ägene Valley	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Le Trient Valley Tête Noire	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 393.
Van d'en Haut Dent du Salantin	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 393.
Martigny Mont Chemin Crettaz Mine	[Synchysite-(Ce)]
Les Planches pass	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 393.
Martigny road tunnel	[Synchysite-(Ce)]
Tête des Econduits	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 394.
Raron Joli Valley	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 393.
Visp Baltschieder Valley Alpjuhorn Mt.	[Synchysite-(Ce)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 393.

UK
England Cumbria South Eastern Region (Westmorland) Eastern Fells Shap Shap Pink Quarry	[Synchysite-(Ce)] M.Wirth collection, D.Green identification (Manchester Univ.)
Devon Tavistock District Peter Tavy North Devon United (East Wheal Friendship)	[Synchysite-(Ce)] UKJMM Vol.29 p.49-52
Scotland North West Highlands (Inverness-shire) Isle of Skye Luib Eas a Bradain	S Rust collection
Wales Gwynedd (Merionethshire) Blaenau Ffestiniog Gloddfa Ganol (Oakley) Quarry	[Synchysite-(Ce)]
Manod Quarry (Manod New Setts Quarry)	[Synchysite-(Ce)] No reference listed
Tanygrisiau Cwmorthin Quarry	[Synchysite-(Ce)]
Tanygrisiau Railway Station	[Synchysite-(Ce)] [UKJMM 16:30-33]
Powys (Radnorshire) Old Radnor Wethel Dolyhir Quarry	[Synchysite-(Ce)] Cotterell TF et al (2011) The mineralogy of Dolyhir quarry, Old Radnor. Powys, Wales. UKJMM 32:5-61

Ukraine
Zhytomyr Oblast' (Zhitomir Oblast') Volodarsk-Volynskii (Volodars'k-Volyns'kyy; Wolodarsk-Wolynskii)	[Synchysite-(Ce)] Lyckberg, P., Chornousenko, V. & Wilson, W. E. (2009): Volodarsk-Volynski, Zhitomir Oblast, Ukraine. Mineralogical Record, 40, 473-506.

USA
Arkansas Hot Spring Co. Magnet Cove Kimzey Calcite Quarry	[Synchysite-(Ce)] R&M 67:6 p402-404
California Riverside Co. Jurupa Mts Jurupa Jensen Quarry (Oak Quarry)	MinRec 15:273-290
Colorado Fremont Co. Cotopaxi District Cotopaxi feldspar mine (Henry pegmatite)	[Synchysite-(Y)] "Minerals of Colorado, updated & revised", pp. 14-15, by Eckel, Edwin B., 1997
Iron Mountain complex McClure Mountain	[Synchysite-(Ce)] Minerals of Colorado (1997) Eckels, E. B.
Cabin Group carbonatite	[Synchysite-(Ce)] Minerals of Colorado (1997) E.B. Eckels
McClure Gulch carbonatite dike	[Synchysite-(Ce)] Minerals of Colorado (1997) Eckels, E. B.
Gunnison Co. Goose Creek District Adair Group	U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Unnamed Thorium Prospects (MRDS - 10087959)	U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
White Earth District (Powderhorn District) Iron Hill	[Synchysite-(Ce)] "Minerals of Colorado, updated & revised", p. 17, by Eckel, Edwin B., 1997
Jefferson Co. South Platte Pegmatite District Big Bear No. 2 pegmatite (Big Bear pegmatite; Little Bear pegmatite; Big Bear No. 1 pegmatite) ?	[Synchysite-(Y)] Rare-Earth Pegmatites of the South Platte District, Colorado CGS Res Ser 11
Big Bertha Mine (Big Bertha pegmatite)	[Synchysite-(Y)] Minerals of Colorado (1997) E.B. Eckels
Dazie Bell claim ?	[Synchysite-(Y)] Rare-Earth Pegmatites of the South Platte District, Colorado CGS Res Ser 11
Madonna No. 3 pegmatite (Madonna Western pegmatite) ?	[Synchysite-(Y)] Rare-Earth Pegmatites of the South Platte District, Colorado CGS Res Ser 11
Seerie pegmatite (Cooper pegmatite)	[Synchysite-(Y)] Minerals of Colorado (1997) E.B. Eckels
White Cloud pegmatite	[Synchysite-(Y)] Rare-Earth Pegmatites of the South Platte District, Colorado CGS Res Ser 11
Teller Co. Black Cloud Mine (Black Cloud pegmatite; Spillman Prospect)	[Synchysite-(Y)] Minerals of Colorado (1997) E.B. Eckels
Snowflake Feldspar mine	[Synchysite-(Y)] Rare-Earth Pegmatites of the South Platte District, Colorado CGS Res Ser 11
Idaho Lemhi Co. Lemhi Pass District	[Synchysite-(Y)] USGS PP1049-A(Staatz,1979)
Massachusetts Norfolk Co. Quincy	[Synchysite-(Ce)] Smith, W. L.; Stone, J.; Ross, D. R.; Levine, H. (1960), Doverite, a Possible New Yttrium Fluocarbonate from Dover, Morris County, New Jersey. (American Mineralogist 45:92-98.)
Michigan Ontonagon Co. White Pine White Pine Mine	[Synchysite-(Ce)] Rocks & Min.: 58:112; 61:345.
Missouri Washington Co. Sullivan Pea Ridge Mine	R&M 73:2 pp 98-117
Montana Ravalli Co.	[Synchysite-(Y)] Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 288.
New Hampshire Carroll Co. Wakefield Hamm and Weeks Quarry (Province Lake Quarry) ?	[Synchysite-(Ce)] T Mortimer (mindatnh.org)
Hillsborough Co. Nashua Mine Falls Park	[Synchysite-(Ce)]
New Jersey Morris Co. Mine Hill Borough Scrub Oak Mine (Replogle Mine)	[Synchysite-(Y)] Am. Min.: 51:152, Levinson (1966).
Sussex Co. Franklin Mining District Franklin Buckwheat Pit (Southwest Opening; Buckwheat Mine)	[Synchysite-(Ce)] Bearss, G. & Cianciulli, J.: The Picking Table:41(2):17-18 (2000); Analysis by Andy Roberts.
New York St. Lawrence Co. Pierrepont Power's Farm (Bower Powers farm; Ryland Crary farm) Phosphate vein	[Synchysite-(Ce)] Steve Chamberlain et al (2009) "Minerals of the Phosphate vein, Bower Powers Farm, Pierrepont, St. Lawrence Co., NY." The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 13-15.
Rossie Rossie Lead Mines	[Synchysite-(Ce)] [MinRec 32:273]
Texas Llano Co. Llano Badu Hill pegmatite	[Synchysite-(Y)] R&M 66:3 pp 196-224
Vermont Windham Co. Putney	Johannes Swarts collection
Virginia Augusta Co. Buck Hill	[Synchysite-(Ce)] http://csmres.jmu.edu/geollab/baedke/dept/abs2002.pdf.; Raiter, E. et al (2002) 29th Rochester Mineralogical Symposium, Abstracts of contributed papers, 15.; Rocks & Minerals 84:352-362.
Washington Okanogan Co. Golden Horn Batholith Washington Pass	[Synchysite-(Ce)] Micro Probe Volume VI Number 8
Wisconsin Marathon Co. Rib Mountain Wausau Plateau	[MinRec 12:95]

Vietnam
Lai Chau Province Phong Tho District Mt Fansipan Nâm Nâm Xe REE deposit	[Synchysite-(Ce)] Collection of NHM, Vienna

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