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Alloclasite

A valid IMA mineral species - grandfathered
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02022230017271920804547.jpg
Alloclasite

Bou Azzer mining district, Drâa-Tafilalet Region, Morocco
01793660017271920835236.jpg
Alloclasite

Elizabeth Mine, Oraviţa, Caraş-Severin County, Romania
08126450017271920865162.jpg
Alloclasite, etc.

Cobalt Mine, Scar Crag, Causey Pike, Above Derwent, Allerdale, Cumbria, England, UK
02444510017864941693934.jpg
Alloclasite

Bou Azzer mining district, Drâa-Tafilalet Region, Morocco
01793660017271920835236.jpg
Alloclasite

Elizabeth Mine, Oraviţa, Caraş-Severin County, Romania
08126450017271920865162.jpg
Alloclasite, etc.

Cobalt Mine, Scar Crag, Causey Pike, Above Derwent, Allerdale, Cumbria, England, UK
02022230017271920804547.jpg
Alloclasite

Bou Azzer mining district, Drâa-Tafilalet Region, Morocco
00468210017271920913077.jpg
Alloclasite

Elizabeth Mine, Oraviţa, Caraş-Severin County, Romania
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About AlloclasiteHide

Formula:
Co1-xFexAsS
(x ≈ 0-0.35)
Colour:
Steel gray to silver
Lustre:
Metallic
Hardness:
5
Specific Gravity:
5.95
Crystal System:
Monoclinic
Name:
For the Greek άλλος ("allos") for "other" and κλάσις ("klasis"), "to break", because its cleavage was believed to be different from marcasite.
See also the chemically very similar Cobaltite and Glaucodot. Compare 'UM1966-01-As:CoNiS'.

Fe content is distinctly higher than that of cobaltite, and the Fe usually occupies about 25% of the (Co,Fe) site (Kingston, 1971).


Unique IdentifiersHide

Mindat ID:
134
Long-form identifier:
mindat:1:1:134:2

IMA Classification of AlloclasiteHide

IMA status:
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Co3+(AsS)3-
First published:
1866
Type description reference:
Tschermak, G. (1866) Der alloklas und der sogenannte glaukodot von Orawicza. Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften, 53, 220-225.

Classification of AlloclasiteHide

Strunz-mindat (2026):
2.EB.10b

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.
Dana 8th ed.:
2.12.6.2

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
Hey's CIM Ref.:
3.10.16

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
10 : Sulphides etc. of Co

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference for Standard
AclIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
AloThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of AlloclasiteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Steel gray to silver
Streak:
Nearly black
Hardness:
5 on Mohs scale
Hardness:
VHN100=818 - 940 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Perfect
perfect on {101}
distinct on {010}
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
5.95 g/cm3 (Measured)    6.188 g/cm3 (Calculated)

Optical Data of AlloclasiteHide

Reflectivity:
WavelengthR1 (%)R2 (%)
400nm49.5% 48.2%
420nm48.7% 48.3%
440nm48.2% 48.6%
460nm47.8% 48.8%
480nm47.6% 49.2%
500nm47.6% 49.7%
520nm47.8% 50.1%
540nm48.0% 50.4%
560nm48.1% 50.5%
580nm48.4% 50.6%
600nm48.6% 50.7%
620nm48.8% 50.7%
640nm49.0% 50.5%
660nm49.1% 50.3%
680nm49.1% 50.1%
700nm49.2% 49.9%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 50.7%.
R1 shown in black, R2 shown in red

Chemistry of AlloclasiteHide

Mindat Formula:
Co1-xFexAsS

(x ≈ 0-0.35)
Elements listed:
As, Co, Fe, S - search for minerals with similar chemistry
Common Impurities:
Ni

Chemical AnalysisHide

wt%
 123
Co25.4 %28.5 %23.3 %
Fe8.4 %4.0 %7.7 %
As44.3 %44.9 %47.3 %
S18.7 %17.8 %20.7 %
Total:96.8 %95.2 %99 %
Empirical formulas:
Sample IDEmpirical Formula
1(Co0.74Fe0.26)1.00As1.01S1.00
2(Co0.87Fe0.13)1.00As1.02S10.95
3(Co0.74Fe0.26)1.00As1.20S1.23
Sample references:
IDLocalityReferenceNotes
1Elizabeth Mine, Oraviţa, Caraş-Severin County, Romania
Kingston, P. W. (1971) On alloclasite, a Co-Fe sulpharsenide. The Canadian Mineralogist, 10 (5). p.838-846.
EMPA analysis of sample associated with calcite and a small intergrown gold wire.
2  "  "
Kingston, P. W. (1971) On alloclasite, a Co-Fe sulpharsenide. The Canadian Mineralogist, 10 (5). p.838-846.
EMPA analysis of Royal Ontario Museum sample
3Dohgatani mine, Totsukawa village, Yoshino district, Nara Prefecture, Japan
Kingston, P. W. (1971) On alloclasite, a Co-Fe sulpharsenide. The Canadian Mineralogist, 10 (5). p.838-846.
EMPA analysis. No details on the sample was given by Kingston.

Crystallography of AlloclasiteHide

Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
P21
Cell Parameters:
a = 4.661 Å, b = 5.602 Å, c = 3.411 Å
β = 90.03°
Ratio:
a:b:c = 0.832 : 1 : 0.609
Unit Cell V:
89.06 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals are prismatic parallel [010] , to 5 mm, in columnar to radiating aggregates; commonly massive.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005134AlloclasiteScott J D, Nowacki W (1976) The crystal structure of alloclasite, CoAsS, and the alloclasite-cobaltite transformation The Canadian Mineralogist 14 561-56619760293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.58 Å(30)
2.802 Å(30)
2.750 Å(100)
2.469 Å(90)
2.401 Å(50)
1.817 Å(70)
1.707 Å(30)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])
Geological Setting:
In calcite or quartz veins of apparently low-temperature, late-stage hydrothermal origin. Also in silicified, recrystallized metamorphic rock.

Type Occurrence of AlloclasiteHide

Synonyms of AlloclasiteHide

Other Language Names for AlloclasiteHide

Relationship of Alloclasite to other SpeciesHide

Member of:
Löllingite Group
Other Members of Löllingite Group:
AnduoiteRuAs2Orth.
ClinosaffloriteCoAs2Mon. 2/m : P21/m
CostibiteCoSbSOrth. mm2 : Pmn21
LöllingiteFeAs2Orth. mmm(2/m2/m2/m) : Pnnm
NisbiteNiSb2Orth. mmm(2/m2/m2/m) : Pnnm
OeniteCoSbAsOrth.
OmeiiteOsAs2Orth.
ParacostibiteCoSbSOrth. mmm(2/m2/m2/m) : Pbca
PararammelsbergiteNiAs2Orth. mmm(2/m2/m2/m) : Pbca
RammelsbergiteNiAs2Orth. mmm(2/m2/m2/m) : Pnnm
Safflorite(Co,Ni,Fe)As2Orth. mmm(2/m2/m2/m) : Pnnm
'UM1998-01-AsSb:CoFeNi'(Fe,Ni)SbAs

Common AssociatesHide

Associations Based on Photo Data:
8 photos of Alloclasite associated with SpherocobaltiteCoCO3
5 photos of Alloclasite associated with QuartzSiO2
3 photos of Alloclasite associated with ChalcopyriteCuFeS2
3 photos of Alloclasite associated with ErythriteCo3(AsO4)2 · 8H2O
2 photos of Alloclasite associated with FukuchiliteCu3FeS8
2 photos of Alloclasite associated with ScoroditeFe3+AsO4 · 2H2O
2 photos of Alloclasite associated with Chlorite Group
2 photos of Alloclasite associated with Native SilverAg
2 photos of Alloclasite associated with Safflorite(Co,Ni,Fe)As2
2 photos of Alloclasite associated with ArsenopyriteFeAsS

Related Minerals - Strunz-mindat GroupingHide

2.EB.SelenolauriteRuSe2Iso. m3(2/m3) : Pa3
2.EB.AndrieslombaarditeRhSbSIso. 23 : P213
2.EB.Iridarsenite(Ir,Ru)As2Mon. 2/m : P21/b
2.EB.Kanatzidisite(SbBiS3)2Te2Mon. 2/m : P21/m
2.EB.05aVaesiteNiS2Iso. m3(2/m3) : Pa3
2.EB.05aHaueriteMnS2Iso. m3(2/m3) : Pa3
2.EB.05aLauriteRuS2Iso. m3(2/m3) : Pa3
2.EB.05aGaotaiiteIr3Te8Iso. m3(2/m3) : Pa3
2.EB.05aPenroseite(Ni,Co,Cu)Se2Iso. m3(2/m3) : Pa3
2.EB.05aFukuchiliteCu3FeS8Iso. m3(2/m3) : Pa3
2.EB.05aVillamanínite(Cu,Ni,Co,Fe)S2Tric.
2.EB.05aErlichmaniteOsS2Iso. m3(2/m3) : Pa3
2.EB.05aSperrylitePtAs2Iso. m3(2/m3) : Pa3
2.EB.05aGeversitePtSb2Iso. m3(2/m3) : Pa3
2.EB.05aCattieriteCoS2Iso. m3(2/m3) : Pa3
2.EB.05aAurostibiteAuSb2Iso. m3(2/m3) : Pa3
2.EB.05aTrogtaliteCoSe2Iso. m3(2/m3) : Pa3
2.EB.05a v'Cayeuxite'
2.EB.05aKruťaiteCuSe2Iso. m3(2/m3) : Pa3
2.EB.05aPyriteFeS2Iso. m3(2/m3) : Pa3
2.EB.05aInsizwaitePtBi2Iso. m3(2/m3) : Pa3
2.EB.05bBambollaiteCu(Se,Te)2Tet.
2.EB.05aDzharkeniteFeSe2Iso. m3(2/m3) : Pa3
2.EB.10aMarcasiteFeS2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10eParacostibiteCoSbSOrth. mmm(2/m2/m2/m) : Pbca
2.EB.10fOeniteCoSbAsOrth.
2.EB.10ePararammelsbergiteNiAs2Orth. mmm(2/m2/m2/m) : Pbca
2.EB.10aMattagamiteCoTe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10aFrohbergiteFeTe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10dCostibiteCoSbSOrth. mm2 : Pmn21
2.EB.10cGlaucodot(Co0.50Fe0.50)AsSOrth. mm2 : Pmn21
2.EB.10aPetříčekiteCuSe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10aKulleruditeNiSe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10aFerroseliteFeSe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15bSeinäjokiteFeSb2Orth.
2.EB.15aRammelsbergiteNiAs2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aClinosaffloriteCoAs2Mon. 2/m : P21/m
2.EB.15cPaxiteCuAs2Mon. 2/m : P21/b
2.EB.15aNisbiteNiSb2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aLöllingiteFeAs2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aSafflorite(Co,Ni,Fe)As2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aOmeiiteOsAs2Orth.
2.EB.15aAnduoiteRuAs2Orth.
2.EB.20ArsenopyriteFeAsSMon. 2/m : P21/b
2.EB.20Ruarsite(Ru,Os)AsSMon.
2.EB.20Osarsite(Os,Ru)AsSMon.
2.EB.20GudmunditeFeSbSMon. 2/m : P21/b
2.EB.25MayingiteIrBiTeIso. m3(2/m3) : Pa3
2.EB.25MaslovitePtBiTeIso. 23 : P213
2.EB.25ParagersdorffiteNi(As,S)2Iso. m3(2/m3) : Pa3
2.EB.25OrthogersdorffiteNiAsSOrth. mm2 : Pca21
2.EB.25SulfopadmaitePdBiSIso. 23 : P213
2.EB.25JolliffeiteNiAsSeIso. m3(2/m3) : Pa3
2.EB.25CobaltiteCoAsSOrth. mm2 : Pca21
2.EB.25GuixiangiteNiBiSIso. 23 : P213
2.EB.25TestibiopalladitePdSbTeIso.
2.EB.25 va'Antimony-bearing Gersdorffite'Ni(As,Sb)S
2.EB.25KalungaitePdAsSeIso. m3(2/m3) : Pa3
2.EB.25Hollingworthite(Rh,Pt,Pd)AsSIso. m3(2/m3) : Pa3
2.EB.25MicheneritePdBiTeIso. 23 : P213
2.EB.25GersdorffiteNiAsSIso. 23 : P213
2.EB.25MilotaitePdSbSeIso. 23 : P213
2.EB.25TolovkiteIrSbSIso.
2.EB.25'Platarsite'Pt(As,S)2Iso. m3(2/m3) : Pa3
2.EB.25WillyamiteCoSbS
2.EB.25ChangchengiteIrBiSIso. 23 : P213
2.EB.25KvačekiteNiSbSeIso. 23 : P213
2.EB.25KrutoviteNiAs2Iso. 23 : P213
2.EB.25PadmaitePdBiSeIso. 432
2.EB.25UllmanniteNiSbSIso. 23 : P213
2.EB.25Irarsite(Ir,Ru,Rh,Pt)AsSIso. m3(2/m3) : Pa3
2.EB.30UrvantsevitePd(Bi,Pb)2Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.EB.35RheniiteReS2Tric. 1 : P1

Other InformationHide

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

Internet Links for AlloclasiteHide

References for AlloclasiteHide

Reference List:
Tschermak, G. (1866) Der alloklas und der sogenannte glaukodot von Orawicza. Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften, 53, 220-225.
Palache, Charles, Berman, Harry, Frondel, Clifford (1944) The System of Mineralogy (7th ed.) Vol. 1 - Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, New York.
Kingston, P. W. (1971) On alloclasite, a Co-Fe sulpharsenide. The Canadian Mineralogist, 10 (5). p.838-846.
Petruk, W.; Harris, D. C.; Stewart, J. M. (1971) Characteristics of the arsenides, sulpharsenides, and antimonides. The Canadian Mineralogist, 11 (1). p.150-186.
Maurel, Colette, Picot, Paul (1973) Sur le mécanisme de la transformation de l'alloclasite en cobaltite : cas du gisement du Lautaret. Bulletin de Minéralogie, 96 (4) 292-297 doi:10.3406/bulmi.1973.6831
Scott, J.D., Nowacki, W. (1976) The crystal structure of alloclasite, (CoAsS), and the alloclasite-cobaltite transformation. The Canadian Mineralogist: 14: 561-566.
Anthony, Bideaux, Bladh, Nichols (1990) Handbook of Mineralogy, Vol. I: 10.
Hem, S. R., Makovicky, E., Gervilla, F. (2001) Compositional trends in Fe, Co and Ni sulfarsenides and their crystal-chemical implications: Results from the Arroyo de La Cueva deposits, Ronda Peridotite, Southern Spain. The Canadian Mineralogist, 39 (3). 831-853 doi:10.2113/gscanmin.39.3.831
Wagner, T., Lorenz, J. (2002) Mineralogy of complex Co-Ni-Bi vein mineralization, Bieber deposit, Spessart, Germany. Mineralogical Magazine, 66 (3) 385-407 doi:10.1180/0026461026630036
(2005) Alloclasite. Handbook of Mineralogy. Mineralogical Society of America
Yang, H., Downs, R. T. (2008) Crystal structure of glaucodot, (Co,Fe)AsS, and its relationships to marcasite and arsenopyrite. American Mineralogist, 93 (7) 1183-1186 doi:10.2138/am.2008.2966

Localities for AlloclasiteHide

Showing 100 localities.

This 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.
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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Argentina
 
  • La Rioja Province
    • Vinchina department
      • Villa San José de Vinchina
Brodtkorb (2002)
Australia
 
  • Northern Territory
    • Barkly Region
      • Tennant Creek
Braize et al. (2026)
  • Queensland
    • City of Mount Isa
      • Mount Isa
Croxford (1974)
Sielecki (1988)
      • Cloncurry
Jeff Steadman
Williams et al 2015 +1 other reference
      • Kuridala
        • Malbon
Lawrence et al. (1998)
      • Selwyn District
Croxford (1974)
  • South Australia
    • Copper Coast Council
      • Moonta
Mineralogical Society of America - ...
  • Tasmania
    • Kentish municipality
      • Lower Beulah
Bottrill
Austria
 
  • Styria
    • Murtal District
      • Spielberg
Leitner (2013)
Raith et al. (2015)
            • Weißenbach district (Flatschachgraben; Weißenbachgraben)
Raith et al. (2015)
  • Vorarlberg
    • Bludenz District
Tropper et al. (2011)
Brazil
 
  • Bahia
    • Maracás
      • Rio Jacaré layered complex
Campbell (2012)
Bulgaria
 
  • Sofia Province
    • Botevgrad Municipality
Kerestedjian (1984)
Canada
 
  • British Columbia
    • Lillooet Mining Division
Montgomery (n.d.)
  • Newfoundland and Labrador
    • Newfoundland
      • Baie Verte Peninsula
        • Baie Verte
Brueckner et al. (2016)
  • Ontario
    • Thunder Bay District
Caglioti (2023)
    • Timiskaming District
      • Cobalt-Gowganda region
[www.ontariominerals.com] +2 other references
          • Casey Township
          • Coleman Township
Mielke (n.d.)
Reiner Mielke 2009
Mineralogical Society of America - ... +1 other reference
        • Elk Lake area
          • Mickle Township
Sabina (2000)
        • Gowganda area
          • Nicol Township
Mineralogical Society of America - ...
Chile
 
  • Atacama
    • Copiapó Province
      • Tierra Amarilla
Lohmeier et al. (2025)
China
 
  • Anhui
    • Wuhu
      • Nanling County
Xiong et al. (2022)
  • Hunan
    • Changsha
      • Liuyang City
Wang et al. (2022)
  • Inner Mongolia
    • Bayannur City (Bayannao'er Prefecture)
      • Urad Rear Banner (Wulate Houqi)
Zhaolong Li et al. (1981)
  • Qinghai
    • Haixi Mongol and Tibetan Autonomous Prefecture
      • Dulan County
Gao et al. (2026)
  • Yunnan
    • Yuxi
      • Xinping County
Yuanren Chen (1976)
Czech Republic
 
  • Karlovy Vary Region
    • Karlovy Vary District
Hloušek et al. (2002)
Ondruš et al. (2003)
Finland
 
  • Satakunta
    • Eurajoki
Pere Tuomas (2009)
France
 
  • Provence-Alpes-Côte d'Azur
    • Hautes-Alpes
      • Briançon
        • Villar-d'Arêne
Mineralogical Society of America - ...
R. Pierrot
Germany
 
  • Baden-Württemberg
    • Freiburg Region
      • Ortenaukreis
        • Oberwolfach
Kolitsch (1996)
      • Rottweil
        • Schenkenzell
          • Wittichen
            • Burgfelsen
    • Karlsruhe Region
      • Pforzheim
        • Würm
Joachim et al. (1993)
  • Hesse
    • Darmstadt
      • Main-Kinzig-Kreis
        • Biebergemünd
          • Bieber
Wagner et al. (2002)
  • Lower Saxony
    • Goslar District
      • Bad Harzburg
        • Radau valley
Gröbner et al. (2019)
  • North Rhine-Westphalia
    • Arnsberg
      • Siegen-Wittgenstein
        • Siegen
          • Eiserfeld
Wittern (2001)
Mills et al. (2020)
            • Kohlenbach Valley
Henrich (2009)
Golze +3 other references
          • Gosenbach
Wittern (2001)
        • Wilnsdorf
          • Obersdorf
www.mineralienatlas.de (2025)
  • Rhineland-Palatinate
    • Altenkirchen
      • Daaden-Herdorf
        • Schutzbach
Schnorrer et al. (1997)
Blass et al. (1998) +1 other reference
      • Kirchen (Sieg)
        • Brachbach
Rolf Golze +3 other references
        • Kirchen
Golze +3 other references
  • Saxony
    • Bautzen District
      • Sohland an der Spree
Sandmann et al. (2015)
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Plaka
          • Plaka Mines
Rieck et al. (2022)
India
 
  • Odisha
    • Keonjhar District
      • Baula Complex
Goldschmidt Conference Abstracts (2011)
Indonesia
 
  • Central Kalimantan Province
    • Lamandau Regency
Dana et al. (2022)
Iran
 
  • Markazi Province
    • Saveh County
Goudarzi et al. (2024)
  • Zanjan Province
    • Mahneshan County
      • Central District
Rezazadeh et al. (2020)
Ireland
 
  • Munster
    • Kerry County
      • Killarney
S. MORETON et al. (1999)
Italy
 
  • Lombardy
    • Lecco Province
      • Primaluna
Vergani et al. (2024)
Vergani F. et al. (2019)
  • Sardinia
    • Sassari Province
      • Ozieri
Ciriotti et al. (2010)
    • South Sardinia Province
      • Fluminimaggiore
Scano (2023)
      • Gonnosfanadiga
Sabelli (2000)
Scano (2023)
Japan
 
  • Nara Prefecture
    • Yoshino district
      • Totsukawa village
Kingston (1971)
  • Wakayama Prefecture
    • Otsuga-mura
      • Nishimuro-gun
Ohnishi et al (2004)
Kazakhstan
 
  • Akmola Region
    • Bulandy District
Kovalev et al. (2018)
Mongolia
 
  • Selenge Province
    • Mandal District
Khishgee et al. (2015)
Morocco
 
  • Drâa-Tafilalet Region
Weiß (2006)
    • Ouarzazate Province
      • Amerzgane Cercle
        • Ouisselsate Caïdat
ONA
    • Zagora Province
      • Agdz Cercle
        • Tansifte Caïdat
          • Agoudal Mines
Favreau (n.d.)
          • Aït Ahmane
Joachim Esche collection (specimen obtained from Jean-Pierre Barral)
          • Tamdrost
Richard Gunter Collection
Norway
 
  • Buskerud
Kullerud et al. (2016)
Papua New Guinea
 
  • Central Province
    • Astrolabe mineral field
Noku et al. (2012)
Portugal
 
  • Aveiro
    • Albergaria-a-Velha
      • Branca
Marques de Sá et al. (2010)
  • Beja
    • Castro Verde
      • Santa Bárbara de Padrões
Lundin Mining 
Romania
 
  • Caraş-Severin County
Szakáll (2002)
Tschermak (1866) +3 other references
Russia
 
  • Bashkortostan
    • Baymaksky District
Melekestseva (2005)
  • Buryatia
    • Eastern Sayan
Izvekova et al. (2021)
  • Khabarovsk Krai
    • Imeni Poliny Osipenko District
AA et al. (2021)
  • Murmansk Oblast
    • Olenegorsk
Bazai et al. (2009)
  • Sverdlovsk Oblast
Azovskova et al. (2013, January)
  • Tuva
    • Chedi-Kholsky District
Vinogradova +2 other references
    • Kaa-Khemsky District
      • Tardan ore cluster
Gas’kov (2008)
South Africa
 
  • Northern Cape
    • Namakwa District Municipality
      • Khâi-Ma Local Municipality
        • Aggeneys
Rudnick et al. (2013)
Spain
 
  • Andalusia
    • Huelva
      • Alosno
        • Tharsis
          • Tharsis Mines
Tornos et al. (1998)
      • Minas de Riotinto
Bocamina (4)
  • Aragon
    • Huesca
      • San Juan de Plan
Fanlo et al. (2004) +2 other references
UK
 
  • England
    • Cornwall
      • Penzance
        • Wherrytown
Embrey et al. (1987)
      • St Hilary
Betterton (2000)
    • Cumbria
      • Allerdale
        • Above Derwent
          • Causey Pike
            • Scar Crag
Mineralogical Society of America - ... +2 other references
          • Coledale
Solferino et al. (2021)
USA
 
  • Alaska
    • Bethel Census Area
      • McGrath Mining District
- (2008)
  • Arizona
    • Yavapai County
      • Mayer
Anthony et al. (1995)
  • Montana
    • Meagher County
Sandfire Resources America Inc.
  • Pennsylvania
    • Montgomery County
      • Marlborough Township
        • Perkiomenville
Mineralogical Society of America - ...
  • Washington
    • Snohomish County
      • Sultan Mining District
        • Williamson Creek
Bart Cannon Collection
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