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Uranmicrolite (of Hogarth 1977)

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System:IsometricColour:Yellowish-brown, ...
Name:Named as a supposed uranium-bearing variety of microlite.
A variety of Microlite Group

No samples described as uranmicrolite (“djalmaite” of Guimarães 1939) (e.g., Baldwin 1989, Rub et al. 1998, Tindle & Breaks 1998, Novák & Černý 1998, Zhang et al. 2004, Breiter et al. 2007, van Lichtervelde et al. 2007, Uher et al. 2007) are rich enough in U to warrant a status as a separate species.

Classification of Uranmicrolite (of Hogarth 1977)

IMA status:Discredited 2010
Hey's CIM Ref.:18.3.2

18 : Niobates and Tantalates
3 : Niobates and tantalates containing U but not rare earths
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Type Occurrence of Uranmicrolite (of Hogarth 1977)

Type Locality:Posse Mine (Posse Farm), São José de Brejaúba (São José de Bryamba), Conceição do Mato Dentro, Minas Gerais, Brazil
Year of Discovery:1957

Physical Properties of Uranmicrolite (of Hogarth 1977)

Lustre:Waxy, Greasy
Colour:Yellowish-brown, greenish-brown, brownish-black
Hardness (Mohs):

Crystallography of Uranmicrolite (of Hogarth 1977)

Crystal System:Isometric

Optical Data of Uranmicrolite (of Hogarth 1977)


Relationship of Uranmicrolite (of Hogarth 1977) to other Species

Related Minerals - Hey's Index Grouping:

- +
18.3.3Betafite (of Hogarth 1977)
18.3.4Plumbobetafite (of Hogarth 1977)

Other Names for Uranmicrolite (of Hogarth 1977)

Other Languages:
Simplified Chinese:黑钽铀矿

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 Uranmicrolite (of Hogarth 1977)

Reference List:

- +
Annales Acad. Brasil. Ciencias (1939), 11, 347.

American Mineralogist (1977): 62: 403-410.

Internet Links for Uranmicrolite (of Hogarth 1977)

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  • Localities for Uranmicrolite (of Hogarth 1977)

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (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.
    • Salta
      • Nevados de Palermo
        • El Quemado District
    Galliski et al. (2001) Bismutotantalite from northwestern Argentina: description and crystal structure. Can. Min. Vol. 39, pp. 103-110.
    • South Australia
      • Flinders Ranges
        • North Flinders Ranges
          • Mt Babbage area (Inlier)
    PA Wulser collection
    • Victoria
      • East Gippsland Shire
        • Omeo
          • Mt Wills Mining District
            • Glen Wills
    Personally collected by Ryan Eagle in 2009
    • Carinthia
      • Millstatt lake ridge
        • Spittal
          • Lieser ravine
    Walter, F. (1998): Exkursion E4 am 27.9.1998 - MinPet 98 (Pörtschach am Wörthersee/Kärnten) - Die Pegmatite des Millstätter See-Rückens. Mitt. Österr. Mineral. Ges. 143, 437-450. [http://www.uibk.ac.at/mineralogie/oemg/bd_143/143minpet98_437-450.pdf]
          • Wolfsberg
    G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    • Santa Cruz Department
      • Ñuflo de Chavez Province
        • San Agustín
    Alfredo Petrov collection
    • Minas Gerais
      • Conceição do Mato Dentro
        • São José de Brejaúba (São José de Bryamba)
    Guimar˜aes, C.P. (1941) Djalmaite, a new radioactive mineral. Amer. Mineral., 26, 343–346.
      • Doce valley
        • Galiléia
    Luis Menezes
      • São João del Rei pegmatite province
        • Nazareno
    Fernando R.M. Pires and A. Raphael Cabral (1998) The Volta Grande pegmatites, Minas Gerais, Brazil: an example of rare-element granitic pegmatites exceptionally enriched in lithium and rubidium: Discussion. The Canadian Mineralogist, 36, 1157-1158.
    • Rio Grande do Norte
      • Borborema mineral province
        • Parelhas
    Beurlen, H., Da Silva, M.R.R., Thomas, R., Soares, D.R., and Olivier, P. (2008): Mineralium Deposita 43, 207-228.; Beurlen, H., Soares, D. R., Thomas, R., Prado-Borges, L. E., & Castro, C. D. (2005). Mineral chemistry of tantalate species new in the Borborema Pegmatitic Province, Northeast Brazil. Anais da Academia Brasileira de Ciências, 77(1), 169-182.
    [MinRec 29:196]
    Beurlen, H., Da Silva, M.R.R., Thomas, R., Soares, D.R., and Olivier, P. (2008): Mineralium Deposita 43, 207-228.
    • Northwest Territories
      • Tungsten
    The Canadian Mineralogist Vol. 41, pp. 139-160 (2003)
    • Ontario
      • Kenora District
        • Pakeagama Lake Area
    Andrew G. Tindle, Fred W. Breaks and Julie B. Selway (2002) Tourmaline in petalite-subtype granitic pegmatites; evidence of fractionation and contamination from the Paleagama Lake and Separation Lake areas of northwestern Ontario, Canada. The Canadian Mineralogist 40:753-78
        • Paterson Lake Area
    Tindle, A.G. & Breaks, F.W. (1998) Oxide minerals of the Separation Rapids rare-element granitic pegmatite group, northwestern Ontario. Canadian Mineralogist, 36, 609-635.
    Tindle, A.G., Breaks, F.W., and Selway, J.B. (2002) Tourmaline in petalite-subtype gramitic pegmatites: evidence of fractionation and contamination from Pakeagama Lake and Separation Lake areas of northwestern Ontario, Canada. Canadian Mineralogist, 40, 753-788.
    • Jiangxi Province
      • Ji'an Prefecture
        • Suichuan Co.
    Yunhuai Lin and Shiyang Chen (1985): Geology and Prospecting 21(3), 23-31
    • Xinjiang Autonomous Region
      • Yili Hasake Autonomous Prefecture (Ili Kazakh Autonomous Prefecture)
        • Aletai Prefecture (Altay Prefecture)
          • Fuyun Co. (Koktokay Co.)
            • Koktokay pegmatite field (Keketuohai pegmatite field)
              • Altay Mine
    Tianren Zou, Xiangchen Zhang, Fuyi Jia, Rucong Wang, Huizhi Cao, and Boqing Wu (1986): Mineral Deposits 5(4), 34-48
    Czech Republic
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Lázně Kynžvart (Bad Königswart)
    Černý, P., Veselovský, F.: Pegmatit Bílý kámen (Weisser Stein) u Kynžvartu. Minerál, 2000, roč. 8, č. 1, s. 10-16.
    • Moravia (Mähren; Maehren)
      • Moravia-Silesia Region
        • Bruntál
          • Praded (Altvater)
    Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
      • Olomouc Region
        • Šumperk (Mährisch Schönberg)
          • Maršíkov (Marchendorf)
    No reference listed
    Novák, M., Černý, P.: Přehled minerálů niobu a tantalu z granitických pegmatitů České republiky. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1999, roč. 7, s. 117-131.; Novák, M.: Maršíkov - Scheibengraben. In Exkurzní průvodce po mineralogických lokalitách na Sobotínsku. Univerzita Palackého v Olomouci, 2002, Olomouc, s. 38-41.
    • Western and Inner Finland Region
      • Orivesi
        • Eräjärvi area
    Sandström, F. & Lahti, S.I. (2009): Viitaniemipegmatiten i Eräjärvi, Orivesi, Finland. Litiofilen 26 (1): 11-38
    • Lombardy
      • Sondrio Province
        • Valchiavenna
          • Chiavenna
    AA. VV., 1996. Collezionare minerali. Hobby & Work.
    • Piedmont
      • Verbano-Cusio-Ossola Province
        • Ossola Valley
          • Domodossola
            • Cosasca
    Boscardin, M.; Mattioli, G. & Pierini, C. (1982): Mikrolith und Columbite. LAPIS 7 (3), 17-19
          • Vigezzo Valley
            • Craveggia
    AA. VV., 1996. Collezionare minerali. Hobby & Work.
            • Druogno
              • Orcesco
    AA. VV., 1996. Collezionare minerali. Hobby & Work.
            • Trontano
    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.
    • Tuscany
      • Livorno Province
        • Elba Island
          • Campo nell'Elba
    Orlandi et al., 1990. Nb-Ta oxides from Elba Island pegmatites. Atti Soc. Tosc. Sci. Nat., Mem., Serie A, 97: 161-173
    P. Orlandi, M. Pasero, N. Perchiazzi (1990) - Nb-Ta oxides from Elba Island pegmatites. - Atti Soc. Tosc. Sc. Nat., Mem. serie A, v.97: 161-173.
    Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp.
    Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp.
    • Honshu Island
      • Kanto Region
        • Ibaraki Prefecture
          • Hitachiohta City
    Matsubara et al (1995) Mineralogical Journal, 17, 338-345
    • Eastern Kazakhstan Province (Shyghys Qazaqstan Oblysy; Vostochno-Kazakhstanskaya Oblast')
      • Kalba Range
        • Irtysh River
    Pavel M. Kartashov data
    • Antananarivo Province
      • Vakinankaratra Region
        • Sahatany Pegmatite Field (Mt Ibity area)
          • Manandona Valley
    Pezzotta, F. (1999): Madagaskar. Das Paradies der Mineralien und Edelsteine. Extra Lapis nr 17, pp 53-54 (german edition)
    • Zambezia Province
      • Alto Ligonha District
    Min. Rec. Vol. 31, p. 489.
    • Urals Region
      • Middle Urals
        • Sverdlovskaya Oblast'
          • Rezh District
            • Lipovka pegmatite field
    Lapis 28(10), 60 (2003)
    • Western Province
      • Gatumba District
    Bertossa, A., 1967. Inventaire des minéraux du Rwanda. Bulletin du Service Géologique de Rwanda 4, 25-45.; Daltry, V.D.C. and O. von Knorring (1998) Type-Mineralogy of Rwanda with Particular Reference to the Buranga Pegmatite. Geologica Belgica 1:1-9
    • Banská Bystrica Region
      • Banská Bystrica Co.
        • Brusno
    Uher, P. ,Černý, P., 1998 : Vzácnoprvková mineralizácia v granitových pegmatitoch Nízkych Tatier. Mineralia Slovaca, 30, 2,93 – 94
    • Bratislava Region
      • Pezinok Co.
        • Pezinok
          • Slnečné Valley
    Uher P., Žitňan P., Ozdín D., 2007: Pegmatitic Nb-Ta oxide minerals in alluvial placers from Limbach, Bratislava Massif, Western Carpathians, Slovakia: compositional variations and evolutionary trend. Journal of Geosciences, 52, 1-2, 133-141.
    • Košice Region
      • Rožňava Co.
    Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
    South Africa
    • KwaZulu-Natal Province
      • Uthungulu District
    Minerals of South Africa
    • Södermanland
      • Utö
    Otter, B. (2004): Utö-mineralriket. Berg & Mineral. 14 (nr 44), 28-36
    • Alabama
      • Coosa Co.
        • Rockford District
    Canadian Mineralogist Vol. 27, pp. 93-105 (1989)
    • California
      • San Diego Co.
        • Mesa Grande District
          • Gem Hill
    Fisher, J., E. E. Foord, and G. A. Bricker, 1999. The geology, mineralogy, and history of the Himalaya mine, Mesa Grande, San Diego County, California. California Geology 52(1):3-18.
        • Ramona District
          • Ramona
    Foord, Eugene E. et al (1989), Mineralogy and Paragenesis of the Little Three Mine Pegmatites, Ramona District, San Diego County, California. Mineralogical Record, 20(2): p. 123.
    • Connecticut
      • Hartford Co.
        • Glastonbury
          • South Glastonbury
      • Litchfield Co.
        • Watertown
          • State route 8
    Bill Barret Coll. Specimen, Minerals identified by Jeremy Zolan
      • Middlesex Co.
        • East Hampton (Chatham)
    Harold Moritz collection. Former Bruce Jarnot collection.
    • North Carolina
      • Mitchell Co.
        • Spruce Pine District
          • Spruce Pine
            • Greasy Creek Township
    Wilson,W.F and McKenzie,B.J.,1985,Some Mineral collecting sites in North Carolina;Rocks and Minerals,Vol.60,pg.84-93
    Warner,Richard.,Poterala,Stephen and Fleisher,Chris (2008) A Note On Uranium Minerals From The Spruce Pine Area,North Carolina: Carolina Geological Society,2008,Annual Meeting,Spruce Pine Mining District
    • Wisconsin
      • Dodge Co.
    Buchholz, T.W., Falster, A.U., and Simmons, WmB. (2007) 34th Rochester Mineralogical Symposium, Contributed Papers.
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