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Nacrite

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Formula:
Al2(Si2O5)(OH)4
System:
Monoclinic
Colour:
White, grey, yellowish, ...
Lustre:
Pearly
Hardness:
2 - 2½
Name:
From the french, Nacre (mother of pearl) alluding to its lustre.
This page provides mineralogical data about Nacrite.

Classification of Nacrite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Explanation of status:
Nacrite appears to be a polytype of kaolinite (as does dickite).
9.ED.05

9 : SILICATES (Germanates)
E : Phyllosilicates
D : Phyllosilicates with kaolinite layers composed of tetrahedral and octahedral nets
Dana 7th ed.:
71.1.1.3
15.7

15 : Silicates of Aluminum
mindat.org URL:
http://www.mindat.org/min-2826.html
Please feel free to link to this page.

First Recorded Occurrence of Nacrite

Year of Discovery:
1807

Physical Properties of Nacrite

Pearly
Colour:
White, grey, yellowish, brownish, etc.
Streak:
White
Hardness (Mohs):
2 - 2½

Crystallography of Nacrite

Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bb
Cell Parameters:
a = 5.14Å, b = 8.94Å, c = 14.4Å
β = 113.7°
Ratio:
a:b:c = 0.575 : 1 : 1.611
Unit Cell Volume:
V 605.90 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction Data:
d-spacingIntensity
For nacrite-2M2:(
(
7.18(100)
4.41(30)
4.36(80)
4.13(70)
3.59(80)
2.43(60)
2.40(40)
1.49(40)

Optical Data of Nacrite

Type:
Biaxial (-)
RI values:
nα = 1.557 nβ = 1.562 nγ = 1.563
2V:
Measured: 40° , Calculated: 48°
Max Birefringence:
δ = 0.006
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r > v strong

Chemical Properties of Nacrite

Formula:
Al2(Si2O5)(OH)4
Essential elements:
All elements listed in formula:

Relationship of Nacrite to other Species

Other Members of Group:
AmesiteMg2Al(AlSiO5)(OH)4
AntigoriteMg3(Si2O5)(OH)4
Baumite(Mg,Al,Mn,Zn,Fe)3(Si,Al)2O5(OH)4
Berthierine(Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4
Brindleyite(Ni,Al)3(Si,Al)2O5(OH)4
Caryopilite(Mn,Mg)3(Si2O5)(OH)4
ChrysotileMg3(Si2O5)(OH)4
Clinochrysotile
CronstedtiteFe22+Fe3+((Si,Fe3+)2O5)(OH)4
DickiteAl2(Si2O5)(OH)4
Fraipontite(Zn,Al)3((Si,Al)2O5)(OH)4
GreenaliteFe2-3(Si2O5)(OH)4
HalloysiteAl2(Si2O5)(OH)4
KaoliniteAl2(Si2O5)(OH)4
KellyiteMn22+Al(AlSiO5)(OH)4
LizarditeMg3(Si2O5)(OH)4
ManandoniteLi2Al4(Si2AlB)O10(OH)8
Népouite(Ni,Mg)3(Si2O5)(OH)4
Odinite(Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4
Orthochrysotile
Parachrysotile
PecoraiteNi3(Si2O5)(OH)4
Webskyite
9.ED.05DickiteAl2(Si2O5)(OH)4
9.ED.05KaoliniteAl2(Si2O5)(OH)4
9.ED.05Odinite(Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4
9.ED.10HalloysiteAl2(Si2O5)(OH)4
9.ED.10HisingeriteFe23+(Si2O5)(OH)4 · 2H2O
9.ED.10Halloysite-7ÅAl2(Si2O5)(OH)4
9.ED.15AmesiteMg2Al(AlSiO5)(OH)4
9.ED.15AntigoriteMg3(Si2O5)(OH)4
9.ED.15Berthierine(Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4
9.ED.15Brindleyite(Ni,Al)3(Si,Al)2O5(OH)4
9.ED.15Caryopilite(Mn,Mg)3(Si2O5)(OH)4
9.ED.15ChrysotileMg3(Si2O5)(OH)4
9.ED.15CronstedtiteFe22+Fe3+((Si,Fe3+)2O5)(OH)4
9.ED.15Fraipontite(Zn,Al)3((Si,Al)2O5)(OH)4
9.ED.15GreenaliteFe2-3(Si2O5)(OH)4
9.ED.15KellyiteMn22+Al(AlSiO5)(OH)4
9.ED.15LizarditeMg3(Si2O5)(OH)4
9.ED.15ManandoniteLi2Al4(Si2AlB)O10(OH)8
9.ED.15Népouite(Ni,Mg)3(Si2O5)(OH)4
9.ED.15PecoraiteNi3(Si2O5)(OH)4
9.ED.15GuidottiiteMn2Fe3+(Fe3+SiO5)(OH)4
9.ED.20Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
9.ED.20ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O (x < 1)
9.ED.20ImogoliteAl2SiO3(OH)4
9.ED.20Neotocite(Mn,Fe,Mg)SiO3 · H2O
9.ED.25BismutoferriteFe23+Bi(SiO4)2(OH)
9.ED.25ChapmaniteFe23+Sb3+(Si2O5)O3(OH)
15.1AndalusiteAl2(SiO4)O
15.2KyaniteAl2(SiO4)O
15.3SillimaniteAl2(SiO4)O
15.4MulliteAl4+2xSi2-2xO10-x
15.5PyrophylliteAl2(Si4O10)(OH)2
15.6DickiteAl2(Si2O5)(OH)4
15.8KaoliniteAl2(Si2O5)(OH)4
15.9Metahalloysite
15.10HalloysiteAl2(Si2O5)(OH)4
15.11Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
71.1.1.1DickiteAl2(Si2O5)(OH)4
71.1.1.2KaoliniteAl2(Si2O5)(OH)4
71.1.1.4HalloysiteAl2(Si2O5)(OH)4

Other Names for Nacrite

Name in Other Languages:
Esperanto:Nakrito
German:Nakrit
Russian:Накрит
Spanish:Nacrita

Other Information

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

References for Nacrite

Reference List:
Brongniart, A (1807); Traité élémentaire de Minéralogie, Paris I, 505.

American Mineralogist (1930): 15: 34.

American Mineralogist (1963): 48: 1196.

Zvyagin, B. B., Soboleva, S. V., Fedotov, A. F. (1972): Refinement of the structure of nacrite by high-voltage electron diffraction. Soviet Physics - Crystallography 17, 448-452.

Zheng, H., Bailey, S. W. (1994): Refinement of the nacrite structure. Clays and Clay Minerals 42, 46-52.

Gaines, Richard V., H. Catherine, W. Skinner, Eugene E. Foord, Brian Mason, Abraham Rosenzweig (1997), Dana's New Mineralogy : The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana: 1407.

Zhukhlistov, A. P. (2008): Crystal structure of nacrite from the electron diffraction data. Crystallography Reports 53, 76-82.

Internet Links for Nacrite

Localities for Nacrite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Argentina
 
  • Santa Cruz
    • Macizo del Deseado
Jovic, S.M., Guido, D.M., Schalamuk, I.B., Ríos, F.J., Tassinari, C.C.G., Recio. C. (2011): Pingüino In-bearing polymetallic vein deposit, Deseado Massif, Patagonia, Argentina: characteristics of mineralization and ore-forming fluids. Mineralium Deposita, 46, 257-271.
Australia
 
  • South Australia
    • Eyre peninsula
      • Middleback Range
        • Iron Duke Complex
Francis, G.L., 2010. Minerals from the South Middleback Range deposits 2003-2008. (self published) 44pp.
        • Iron Knob
Minerals of Iron Monarch, Glyn L. Francis
Austria
 
  • Carinthia
    • Hohe Tauern
      • Hafner group
        • Rennweg
          • Katschberg
G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
  • Salzburg
    • Lungau
      • Murwinkel
        • Schellgaden
          • Katschberg
A. Strasser: Die Minerale Salzburgs (1989)
Bolivia
 
  • La Paz Department
    • Larecaja Province
      • Chacapa
Federico Ahlfeld and Jorge Munoz Reyes: Las Especies Minerales de Bolivia (Banco Minero de Bolivia, 1955)
    • Murillo Province
      • Mt Huayna Potosí (Huaina Potosi)
[MinRec 32:465]
  • Oruro Department
    • Dalence Province
Kempff, O., Paar, W.H., Tawackoli, S.: "Minerales de Bolivia", 115pp (La Paz, 2009)
  • Potosí Department
    • Potosí City
[MinRec 32:465]
    • Rafael Bustillo Province (Bustillos Province)
      • Llallagua
Hyrsl, J. & A. Petrov (2006): Famous Mineral Localities: Llallagua, Bolivia. Mineralogical Record. 37: 117-162
Canada
 
  • Nova Scotia
    • Hants Co.
Alfredo Petrov specimen (ex- Vandall King)
  • Québec
    • Laurentides
      • Deux-Montagnes RCM
        • Saint-Eustache
Sabine (1983) & Horváth collection
    • Montérégie
      • Beauharnois-Salaberry RCM
Horvath collection
Sabina (1983) Misc. Report 32, Geological Survey of Canada,43
      • Vaudreuil-Soulanges RCM
        • Coteau-du-Lac
Sabina (1983) & Horváth collection
        • Sainte-Justine-de-Newton
Horváth Collection - confirmed by visual & XRD
China
 
  • Fujian Province
    • Fuzhou Prefecture
      • Jin'an District
        • Shoushan
Leifu Ren (1988): Acta Petrologica et Mineralogica 7(2)
  • Jilin Province (Manchuria; Dongbei Region)
    • Baishan Prefecture
      • Changbai Co.
Zheng Xia and Ningke Zhang (1986): Chinese Journal of Geology 21(4)
  • Liaoning Province (Manchuria; Dongbei Region)
    • Benxi Prefecture
Zheng Xia and Ningke Zhang (1986): Chinese Journal of Geology 21(4)
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
      • Beroun (Beraun)
Vtělenský J. (1959): Mineralogie oolitických železných rud z některých ložisek Barrandienu. Geotechnica, sv. 26, Nakladatelství ČSAV Praha.
      • Čáslav (Tschaslau)
Duda, Rejl, Slivka: "Mineralien", 1991
    • Ústí Region
      • Krušné Hory Mts (Erzgebirge)
Lapis 23(4), 18-34 (1998)
X ray analysed
Democratic Republic of Congo (Zaïre)
 
  • Kivu
http://www.metafro.be/mineralogy/sample/5121/mineral and http://en.wikipedia.org/wiki/Rutshuru; Wall, F., Williams, C. T., Woolley, A. R., & Nasraoui, M. (1996). Pyrochlore from weathered carbonatite at Lueshe, Zaire. Mineralogical Magazine, 60(402), 731-750.
Finland
 
  • Eastern Finland Region
    • Joensuu
      • Eno
Knorring, O. v., Brinley, G. W. & Hunter, K. 1952. Nacrite from Hirvivaara, northern -Karelia, Finland. Mineralogical Magazine 29, 218, 963-972
France
 
  • Brittany
    • Finistère
      • Pont-de-Buis-lès-Quimerch
        • Lopérec
P Le Roch collection
    • Morbihan
      • Le Roc Saint-André
Le Règne Minéral, (Hors Série 7), 42-58
  • Languedoc-Roussillon
    • Aude
      • Terroles
C.Berbain, G.Favreau - Cahier des micromonteurs n° 2-2000. pp 18-22
    • Hérault
      • Lodève
European Journal of Mineralogy; v. 12; no. 2; p. 329-34
  • Limousin
    • Creuse
      • Soumans
        • Montebras
Michel Treillard collection
Germany
 
  • Baden-Württemberg
    • Black Forest
Lapis 21(12), 43 (1996)
      • Lahr
        • Schweighausen
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
Lapis 1985(5), 17-20
  • Bavaria
    • Franconia
      • Franconian Forest
        • Bad Berneck
F. Müller: "Bayerns steinreiche Ecke", 2nd ed., Oberfränkische Verlagsanstalt und Druckerei GmbH (Hof), 1984
        • Hof
          • Joditz
Weiss: "MIneralfundstellen, Deutschland West", 1990
    • Upper Palatinate
No reference listed
  • Lower Saxony
    • Harz
      • Braunlage
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • St Andreasberg District
No reference listed
  • North Rhine-Westphalia
    • Ruhr Coal Mining area
      • Essen
Rykart, R., Bode, U. (1978) Ungewöhnliche Quarzkristalle aus dem Karbon. Mineralien Magazin, 2(2), 107. Weiss: "Mineralfundstellen, Deutschland West", 1990
      • Herne
Weiss: "Mineralfundstellen, Deutschland West", 1990
    • Siegerland
      • Müsen
Reinhardt, M. (2010): Die Mineralien der Grube Wildermann bei Müsen im Siegerland. Lapis 35 (11), 13-28; 54
  • Rhineland-Palatinate
    • Lahn valley
Wittern: "Mineralfundorte in Deutschland", 2001
    • Palatinate
      • Kirchheimbolanden
        • Dannenfels
Kohout, K. (2008): Der Steinbruch Giro am Mannbühl: Spitzenfunde aus 27 Jahren. Lapis, 33 (5), 32-35.
  • Saarland
    • Nonnweiler
      • Eisen
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • Saxony
    • Chemnitz
      • Penig
Wittern: "Mineralfundorte in Deutschland", 2001, 146
    • Erzgebirge
      • Altenberg
Mineralien-Welt, (2), 17-39.
      • Clausnitz - Sayda District
        • Sayda
Wittern: "Mineralfundorte in Deutschland", 2001
      • Ehrenfriedersdorf
Wittern: "Mineralfundorte in Deutschland", 2001
      • Freiberg District
        • Brand-Erbisdorf
Mineralogical Magazine 1908 15 : 124-127
        • Langenrinne
Frenzel, A. (1874): Mineralogisches Lexicon für das Königreich Sachsen, Leipzig.
        • Zug
Baumann, L., Hofmann, F. & Weber, W. (1997): Glückauf Freiberg. Bergbau, Erze, Mineralien. Bode Verlag Haltern, 168 p.
      • Johanngeorgenstadt District
Wittern: "Mineralfundorte in Deutschland", 2001
Wittern: "Mineralfundorte in Deutschland", 2001
        • Lauta
Hajek, W. (2010): Kristallwelten Marienberg. Weise Verlag, München.
      • Niederschlag-Bärenstein District
        • Bärenstein
          • Niederschlag
Lapis, 19 (4), 13-22+50.
No reference listed
      • Schwarzenberg District
        • Beierfeld
Lapis, 16 (6), 13-20+58.
        • Pöhla
Wittern: "Mineralfundorte in Deutschland", 2001
    • Zwickau
Frenzel, A. (1874): Mineralogisches Lexicon für das Königreich Sachsen, Leipzig.
  • Thuringia
    • Gera
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
    • Wurzbach
      • Weitisberga
Wittern: "Mineralfundorte in Deutschland", 2001
Germany & Czech Republic
 
  • Saxony & Ústí Region (Bohemia; Böhmen; Boehmen)
    • Erzgebirge; Krusné Hory Mts
Lapis 17(2), 31-35 (1992)
Hungary
 
  • Heves Co.
    • Mátra Mts
      • Gyöngyösoroszi
Koch: Minerals of Hungary, 1985
Italy
 
  • Piedmont
    • Torino Province
      • Canavese District
        • Chiusella Valley
          • Traversella
Mineralogical Record, 4 (1), 39-41
  • Trentino-Alto Adige (Trentino-Südtirol)
    • Trento Province
      • Valsugana
        • Levico Terme
Canal, A., Fassina, B., Ferretti, P., Gasparetto, P., Pegoraro, S., Tosato, F., Zammatteo, P. (2012): Compet, galleria a quota 1358 ms.l.m., Monte Fronte, Vetriolo, Trento. Micro, 1-2012, 1-48.
        • Vignola-Falesina
Paolo Gasparetto, Erica Bittarello, Andrea Canal, Lara Casagrande, Marco E. Ciriotti, Bruno Fassina, Paolo Ferretti, Sergio Pegoraro, Fabio Tosato, Paolo Zammatteo (2014): I lavori minerari del Rio Ricet, Vignola, Falesina, Trento. Micro, 12, 50-123.
Japan
 
  • Hokkaido
    • Iburi Province
      • Shiraoi-gun
        • Shiraoi-cho
米田哲朗. (1989). 北海道南白老重晶石・カオリン鉱床の粘土鉱物組成. 粘土科学, 29(2), 69-80.
Kazakhstan
 
  • Karagandy Province (Qaragandy Oblysy; Karaganda Oblast')
    • Betpakdala Desert (Bet-Pak-Dal Desert)
Jeremolenko, V. (2002): Kara-Oba: Mineralogische Perle der Betpak-Ebene bei Dzhambul, Kasachstan. Lapis 27 (4), 13-34 + 50
Mexico
 
Clay Miner. 29:452-453 (1981).
  • Zacatecas
    • Mun. de Ojo Caliente
      • La Blanca
Parker, R. (2010). Geology And Mineral Resources Of The Bilbao Silver-Lead-Zinc Deposit, State Of Zacatecas, Mexico. Private Company Report for Xtierra Inc.
Namibia
 
  • Erongo Region
    • Karibib District
      • Spitzkopje Area
Cairncross, B. (2005) Famous Mineral Localities: Klein Spitzkoppe, Namibia. Mineralogical Record 36(4) 317-335
Medenbach, O. (2001): Paul Ramdohr und die Stiepelmannsche Beryll-Fundstelle. – In: Namibia, Zauberwelt edler Steine und Kristalle, Haltern (Bode Verlag), 222pp., (p. 56-71) ; Medenbach, O. (2001): Paul Ramdohr und die Stiepelmannsche Beryll-Fundstelle. In: Namibia - Zauberwelt edler Steine und Kristalle. Bode Verlag, Haltern, Germany, p. 56-71 (p. 36) ; - Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Mineralien und Fundstellen. Edition Schloss Freudenstein, Bode Verlag, Haltern, p. 288-290 (in German)
Poland
 
  • Świętokrzyskie
    • Świętokrzyskie Mts (Holy Cross Mts)
Migaszewski, Z.M., Starnawska, E., Gałuszka, A. (2007): Gorceixite from the Upper Cambrian Rocks of the Podwiśniówka Mine Pit, Holy Cross Mountains (South-Central Poland). Mineralogia Polonica, 38, 171-184.
Slovakia
 
  • Banská Bystrica Region
Ďuďa R.,Kotuľak P., Káňa R., 1993: Bergbau und Mineralien von Banská Štiavnica (Schemnitz), Slowakei. Emser Hefte, 14, 3, 1-70, Haltern
    • Detva Co.
Rojkovičová,Ľ., 1982: Rudná mineralizácia v Javorí. Min.Slovaca, 14,5,461 – 470
    • Revúca Co.
      • Sirk
Grecula,P. et al., 1995: Ložiska nerastných surovín Slovenského rudohoria. Zväz.1, Bratislava, 834 s
    • Rimavská Sobota Co.
      • Tisovec
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
  • Košice Region
    • Rožňava Co.
      • Rožňava (Rosenau; Rozsnyó)
Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Varček C., 1957: Prehľad paragenetických pomerov rudných ložísk Gemera. Geol. Práce. Zoš, 46, p. 107-131.
    • Spišská Nová Ves Co.
Ďuďa R., Peterec D., 1995 : Die Mineralien der siderit - baryt lagersttäte von Rudňany ( Kotterbach ) in der Slowakei. Mineralien Welt /Haltern/, 1, s.20 - 31
  • Trenčín Region
    • Prievidza 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
    • eThekwini District
      • Durban
        • Umhlatuzana valley
Cairncross, B. & Dixon, R. (1995). Minerals of South Africa. Geological Society of South Africa: Linden.
South Korea
 
  • Gyeongsangbuk-do (Kyongsang-bukto; Gyeongsangbugdo)
    • Bonghwa-gun
G. Grundmann collection # 128, originally sold by Kristalldruse.
Spain
 
  • Andalusia
    • Málaga
M.D. Ruiz Cruz, B. Andreo : "Tosudite in very low-grade metamorphic graywackes from the Malaga area (Betic Cordilleras, Spain)", Eur. J. Mineral. , 1996, 8, 1391-1399.
  • Catalonia
    • Tarragona
      • Priorat
        • Bellmunt del Priorat
Joan Abella i Creus (2008): Minerals I Mines De La Conca De Bellmunt Del Priorat. (photographs)
        • El Molar
Joan Abella i Creus (2008): Minerals I Mines De La Conca De Bellmunt Del Priorat. (photographs)
Sweden
 
  • Västerbotten
    • Skellefteå
Sandström, F. (2008) Varuträskpegmatiten. Litofilen, 25 (2), 17-46
UK
 
  • England
    • Cumbria
      • South Eastern Region (Westmorland)
        • Eastern Fells
          • Shap
BMS Database
    • Devon
      • South Devon
        • Torquay
    • Leicestershire
      • Newtown Linford
Claringbull, G.F. (1952): Mineralogical Magazine 29, 973-973
Ukraine
 
  • Crimea Oblast'
    • Crimea peninsula
      • Alushta
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
  • Donetsk (Donets'k) Oblast'
    • Central Donbass
Pavel M. Kartashov data
  • Kiev Oblast' (Kyiv Oblast'; Kyivshchyna)
    • Kremenchug Reservoir
USA
 
  • Arizona
azminerals.com
      • Steeple Rock District (Duncan District)
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 203, 310.
  • Arkansas
    • Pulaski Co.
      • Little Rock
J. Lawrence Smith (1867) On a new locality of Tetrahedrite, Tennantite, and Nacrite, with some account of the Kellogg Mines of Arkansas. The American Journal of Science and Arts, Vol. 93
  • Colorado
    • El Paso Co.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
"Minerals of Colorado, updated & revised", p. 14, by Eckel, Edwin B., 1997
Minerals of Colorado (1997) Eckels, E. B.
    • Jefferson Co.
Minerals of Colorado (1997) E.B. Eckels
    • Ouray Co.
Minerals of Colorado (1997) E.B. Eckels
  • Connecticut
    • Fairfield Co.
Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
    • Hartford Co.
Januzzi, Ronald. (1976): Mineral Localities of CT & SE NY State, p. 234-5.
  • Michigan
    • Marquette Co.
      • Marquette iron range
        • Negaunee
Mineralogy of Michigan (2004) Heinrich & Robinson
  • Nevada
    • Elko Co.
      • Cornucopia District
NBMG Spec. Pub. 31 Minerals of Nevada
    • Washoe Co.
      • Cottonwood District
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Mexico
    • Colfax Co.
Minerals of New Mexico 3rd ed.
  • Rhode Island
    • Providence Co.
Miller, 1972. Minerals of Rhode Island.
  • Virginia
    • Rockbridge Co.
      • Glasgow
Rocks & Min.: 60:157.
Mineral and/or Locality  
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