Alloclasite (original) (raw)

A valid IMA mineral species - grandfathered

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About AlloclasiteHide

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Colour:

Steel gray to silver

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

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Long-form identifier:

mindat:1:1:134:2

8b2595eb-635e-4d0d-ad1b-89c8b48dc8f2

IMA Classification of AlloclasiteHide

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Approved, 'Grandfathered' (first described prior to 1959)

Type description reference:

Classification of AlloclasiteHide

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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.

2.12.6.2

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2

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

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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.

Symbol Source Reference
Acl IMA–CNMNC Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Alo The 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

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Colour:

Steel gray to silver

Hardness:

VHN100=818 - 940 kg/mm2 - Vickers

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

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Reflectivity:

Wavelength R1 R2
400nm 49.5% 48.2%
420nm 48.7% 48.3%
440nm 48.2% 48.6%
460nm 47.8% 48.8%
480nm 47.6% 49.2%
500nm 47.6% 49.7%
520nm 47.8% 50.1%
540nm 48.0% 50.4%
560nm 48.1% 50.5%
580nm 48.4% 50.6%
600nm 48.6% 50.7%
620nm 48.8% 50.7%
640nm 49.0% 50.5%
660nm 49.1% 50.3%
680nm 49.1% 50.1%
700nm 49.2% 49.9%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 50.7%.
R1 shown in black, R2 shown in red

Chemistry of AlloclasiteHide

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Crystallography of AlloclasiteHide

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Crystal System:

Monoclinic

Class (H-M):

2 - Sphenoidal

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)

Morphology:

Crystals are prismatic parallel [010] , to 5 mm, in columnar to radiating aggregates; commonly massive.

Crystal StructureHide

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ID Species Reference Link Year Locality Pressure (GPa) Temp (K)
0005134 Alloclasite Scott J D, Nowacki W (1976) The crystal structure of alloclasite, CoAsS, and the alloclasite-cobaltite transformation The Canadian Mineralogist 14 561-566 1976 0 293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

d-spacing Intensity
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

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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

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General Appearance of Type Material:

Place of Conservation of Type Material:

Reference:

Tschermak, G. (1866) Der alloklas und der sogenannte glaukodot von Orawicza. Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften, 53, 220-225.

Synonyms of AlloclasiteHide

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Other Language Names for AlloclasiteHide

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Relationship of Alloclasite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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2.EB. Iridarsenite (Ir,Ru)As2 Mon. 2/m : _P_21/b
2.EB. Selenolaurite RuSe2 Iso. m_3(2/m_3) : P _a_3
2.EB. Andrieslombaardite RhSbS Iso. 23 : _P_213
2.EB. Kanatzidisite (SbBiS3)2Te2 Mon. 2/m : _P_21/m
2.EB.05a Aurostibite AuSb2 Iso. m_3(2/m_3) : P _a_3
2.EB.05b Bambollaite Cu(Se,Te)2 Tet.
2.EB.05a Cattierite CoS2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Erlichmanite OsS2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Fukuchilite Cu3FeS8 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Geversite PtSb2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Hauerite MnS2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Insizwaite Pt(Bi,Sb)2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Krut'aite CuSe2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Laurite RuS2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Penroseite (Ni,Co,Cu)Se2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Pyrite FeS2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Sperrylite PtAs2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Trogtalite CoSe2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Vaesite NiS2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Villamanínite (Cu,Ni,Co,Fe)S2 Tric.
2.EB.05a Dzharkenite FeSe2 Iso. m_3(2/m_3) : P _a_3
2.EB.05a Gaotaiite Ir3Te8 Iso. m_3(2/m_3) : P _a_3
2.EB.05a v Cayeuxite
2.EB.10d Costibite CoSbS Orth. m _m_2 : P m _n_21
2.EB.10a Ferroselite FeSe2 Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m
2.EB.10a Frohbergite FeTe2 Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m
2.EB.10c Glaucodot (Co0.50Fe0.50)AsS Orth. m _m_2 : P m _n_21
2.EB.10a Kullerudite NiSe2 Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m
2.EB.10a Marcasite FeS2 Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m
2.EB.10a Mattagamite CoTe2 Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m
2.EB.10e Paracostibite CoSbS Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a
2.EB.10e Pararammelsbergite NiAs2 Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a
2.EB.10f Oenite CoSbAs Orth.
2.EB.10a Petříčekite CuSe2 Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m
2.EB.15a Anduoite (Ru,Os)As2 Orth.
2.EB.15a Clinosafflorite CoAs2 Mon. 2/m : _P_21/m
2.EB.15a Löllingite FeAs2 Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m
2.EB.15a Nisbite NiSb2 Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m
2.EB.15a Omeiite (Os,Ru)As2 Orth.
2.EB.15c Paxite CuAs2 Mon. 2/m : _P_21/b
2.EB.15a Rammelsbergite NiAs2 Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m
2.EB.15a Safflorite (Co,Ni,Fe)As2 Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m
2.EB.15b Seinäjokite FeSb2 Orth.
2.EB.20 Arsenopyrite FeAsS Mon. 2/m : _P_21/b
2.EB.20 Gudmundite FeSbS Mon. 2/m : _P_21/b
2.EB.20 Osarsite (Os,Ru)AsS Mon.
2.EB.20 Ruarsite (Ru,Os)AsS Mon.
2.EB.25 va Antimony-bearing Gersdorffite Ni(As,Sb)S
2.EB.25 Cobaltite CoAsS Orth. m _m_2 : P c _a_21
2.EB.25 Gersdorffite NiAsS Iso. m_3(2/m_3) : P _a_3
2.EB.25 Hollingworthite (Rh,Pt,Pd)AsS Iso. m_3(2/m_3) : P _a_3
2.EB.25 Irarsite (Ir,Ru,Rh,Pt)AsS Iso. m_3(2/m_3) : P _a_3
2.EB.25 Jolliffeite NiAsSe Iso. m_3(2/m_3) : P _a_3
2.EB.25 Krutovite NiAs2 Iso. 23 : _P_213
2.EB.25 Maslovite PtBiTe Iso. 23 : _P_213
2.EB.25 Michenerite PdBiTe Iso. 23 : _P_213
2.EB.25 Padmaite PdBiSe Iso. 432
2.EB.25 Platarsite Pt(As,S)2 Iso. m_3(2/m_3) : P _a_3
2.EB.25 Testibiopalladite PdSbTe Iso.
2.EB.25 Tolovkite IrSbS Iso.
2.EB.25 Ullmannite NiSbS Iso. 23 : _P_213
2.EB.25 Willyamite CoSbS
2.EB.25 Changchengite IrBiS Iso. 23 : _P_213
2.EB.25 Mayingite IrBiTe Iso. m_3(2/m_3) : P _a_3
2.EB.25 Kalungaite PdAsSe Iso. m_3(2/m_3) : P _a_3
2.EB.25 Milotaite PdSbSe Iso. 23 : _P_213
2.EB.25 Paragersdorffite Ni(As,S)2 Iso. m_3(2/m_3) : P _a_3
2.EB.25 Orthogersdorffite NiAsS Orth. m _m_2 : P c _a_21
2.EB.25 Kvačekite NiSbSe Iso. 23 : _P_213
2.EB.30 Urvantsevite Pd(Bi,Pb)2 Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _I_4/m m m
2.EB.35 Rheniite ReS2 Tric. 1 : _P_1

Other InformationHide

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Health Risks:

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

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References for AlloclasiteHide

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Localities for AlloclasiteHide

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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.

Locality ListHide

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- 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 ⓘ King Tut deposit Brodtkorb (2002)
Australia
Queensland City of Mount Isa Mount Isa ⓘ Mount Isa Mines ? Croxford (1974)
ⓘ Cloncurry Shire Sielecki (1988)
Cloncurry ⓘ Ernest Henry Cu-Au deposit (Ernest Henry Mine) Jeff Steadman
Malbon ⓘ A Lone Hand Mine Lawrence et al (1998)
ⓘ Monakoff Mine Williams et al 2015 +1 other reference
Selwyn District ⓘ Mount Cobalt Mine Croxford (1974)
South Australia Copper Coast Council Moonta ⓘ Moonta mines (Wallaroo and Moonta Mining; Moonta Copper Recovery Co. Ltd; Moonta Mining Scheme; Moonta Prospecting Syndicate) Mineralogical Society of America - ...
Austria
Styria Murtal District Spielberg ⓘ Flatschach ? Leitner (2013)
ⓘ Cu deposit (Schönberg) ? Raith et al. (2015)
Weißenbach district (Flatschachgraben; Weißenbachgraben) ⓘ Brandegger Mine ? Raith et al. (2015)
Vorarlberg Bludenz District ⓘ Bartholomäberg ? Tropper et al. (2011)
Brazil
Bahia Maracás Rio Jacaré layered complex ⓘ Maracás Menchen mine Campbell (2012)
Bulgaria
Sofia Province Botevgrad Municipality ⓘ Vatia deposit Kerestedjian T (1984)
Canada
British Columbia Lillooet Mining Division ⓘ Little Gem prospect Montgomery (n.d.)
Newfoundland and Labrador Newfoundland Baie Verte Peninsula Baie Verte ⓘ Ming Mine Stefanie M. Brueckner et al. (2016)
Ontario Timiskaming District Cobalt-Gowganda region ⓘ Cobalt area [www.ontariominerals.com] +2 other references
Casey Township ⓘ Langis Mine (Casey Cobalt ; Casey-Seneca)
Coleman Township ⓘ Lawson Mine Reiner Mielke
ⓘ Nipissing 404 Reiner Mielke 2009
ⓘ Silverfields mine (Alexandra mine) Mineralogical Society of America - ... +1 other reference
Elk Lake area Mickle Township ⓘ Mapes Johnston Mine Sabina (2000)
Gowganda area Nicol Township ⓘ Siscoe Mine (Miller Lake O'Brien Mine; O'Brien Mine) Mineralogical Society of America - ...
China
Anhui Wuhu Nanling County ⓘ Yaojialing Zn-Au deposit Xiong et al. (2022)
Hunan Changsha Liuyang City ⓘ Jingchong Co-Cu polymetallic deposit Wang et al. (2022)
Inner Mongolia Bayannur City (Bayannao'er Prefecture) Urad Rear Banner (Wulate Houqi) ⓘ Tanyaokou Fe-Cu-Zn deposit Zhaolong Li et al. (1981)
Yunnan Yuxi Xinping County ⓘ Dahongshan Fe-Cu deposit Yuanren Chen (1976)
Czech Republic
Karlovy Vary Region Karlovy Vary District ⓘ Jáchymov Lapis 2002 (7/8)
ⓘ Elias Mine Ondruš et al. (2003)
Finland
Satakunta Eurajoki ⓘ Olkiluoto Pere Tuomas (2009)
France
Provence-Alpes-Côte d'Azur Hautes-Alpes Briançon Villar-d'Arêne ⓘ Lautaret Pass Mineralogical Society of America - ...
ⓘ Les Clochettes mine R. Pierrot
Germany
Baden-Württemberg Freiburg Region Ortenaukreis Oberwolfach ⓘ Clara Mine Kolitsch (1996)
Rottweil Schenkenzell Wittichen Burgfelsen ⓘ Johann Mine
Karlsruhe Region Pforzheim Würm ⓘ Käfersteige Mine Lapis (2)
Hesse Darmstadt Main-Kinzig-Kreis Biebergemünd Bieber ⓘ "Im Lochborn" Copper mine Wagner et al. (2002)
Lower Saxony Goslar District Bad Harzburg Radau valley ⓘ Gabbro Quarry Joachim Gröbner (2019)
North Rhine-Westphalia Arnsberg Siegen-Wittgenstein Siegen Eiserfeld ⓘ Eisenzecher Zug mine Wittern (2001)
ⓘ Schlänger und Eichert vein Mills et al. (2020)
Kohlenbach Valley ⓘ Brüderbund Mine Henrich (2009)
ⓘ Vereinigte Kohlenbach mine Golze +3 other references
Gosenbach ⓘ Sophie Mine Wittern (2001)
Rhineland-Palatinate Altenkirchen Daaden-Herdorf Schutzbach ⓘ Pius Mine Blass et al. (1998)
Kirchen (Sieg) Brachbach ⓘ Apfelbaumer Zug Mine Rolf Golze +3 other references
Kirchen ⓘ Alexander Mine Golze +3 other references
Saxony Bautzen District Sohland an der Spree ⓘ Sulphide deposit (Sohlander Bergsegen) Sandmann et al. (2015)
Greece
Attica East Attica Lavreotiki Lavrion mining district Plaka Plaka Mines ⓘ Plaka Mine No. 80 Rieck et al. (2022)
India
Odisha Keonjhar District Baula Complex ⓘ Bangur gabbro Goldschmidt Conference Abstracts (2011)
Indonesia
Central Kalimantan Province Lamandau Regency ⓘ Ruwai deposit Dana et al. (2022)
Iran
Zanjan Province Mahneshan County ⓘ Bayche-Bagh Mine Rezazadeh et al. (2020)
Ireland
Munster Kerry County Killarney ⓘ Muckross Mine S. MORETON et al. (1999)
Italy
Lombardy Lecco Province Primaluna Cortabbio ⓘ Faidallo Mine Vergani F. et al. (2019)
Sardinia Sassari Province Ozieri ⓘ Su Elzu Ciriotti et al. (2010)
South Sardinia Province Gonnosfanadiga ⓘ Prameri Sabelli (2000)
Japan
Nara Prefecture Yoshino district Totsukawa village ⓘ Dohgatani mine (Dogatani mine) Kingstone (1971)
Wakayama Prefecture Otsuga-mura Nishimuro-gun ⓘ Sanyo mine Ohnishi et al (2004)
Kazakhstan
Akmola Region ⓘ Raigorodok deposit Kovalev et al. (2018)
Mongolia
Selenge Province Mandal District ⓘ Boroo Mine Khishgee et al. (2015)
Morocco
Drâa-Tafilalet Region ⓘ Bou Azzer mining district S. Weiß: Lapis 31 (7/8)
Ouarzazate Province Amerzgane Cercle Ouisselsate Caïdat ⓘ Bou Azzer Mine Gunnar Färber and Thomas Witzke (2010)
Zagora Province Agdz Cercle Tansifte Caïdat Agoudal Mines ⓘ Agoudal Centre Quarry Georges Favreau collection
Aït Ahmane ⓘ Vein No. 53 Joachim Esche collection (specimen obtained from Jean-Pierre Barral)
Tamdrost ⓘ Tamdrost Mine Richard Gunter Collection
Norway
Buskerud ⓘ Kongsberg silver mining district ? Kullerud et al. (2016)
Papua New Guinea
Central Province Astrolabe mineral field ⓘ Federal Flag Mine (Astrolabe mine) Noku et al. (2012)
Portugal
Aveiro Albergaria-a-Velha Branca ⓘ Palhal Mine Marques de Sá et al. (2010)
Beja Castro Verde Santa Bárbara de Padrões ⓘ Neves-Corvo Mine Cabri et al. (1998)
Romania
Caraş-Severin County ⓘ Oraviţa Szakáll (2002)
ⓘ Elizabeth Mine (TL) Tschermak (1866) +2 other references
Russia
Bashkortostan Baymaksky District ⓘ Ivanovka Co-Cu deposit (Ivanovskoe deposit) Melekestseva (2005)
Khabarovsk Krai ⓘ Albazino deposit AA et al. (2021)
Murmansk Oblast Olenegorsk ⓘ Kirovogorsk open pit Bazai et al. (2009)
Sverdlovsk Oblast ⓘ Bogomol Deposit Azovskova et al. (2013, January)
Tuva Chedi-Kholsky District ⓘ Khovu-Aksy Ni-Co deposit Vinogradova +2 other references
Kaa-Khemsky District ⓘ Tardan Au Deposit Gas’kov (2008)
Spain
Andalusia Huelva Alosno Tharsis Tharsis Mines ⓘ Filón Norte open pit (Filón Norte Mine) Tornos et al. (1998)
Minas de Riotinto ⓘ Rio Tinto Mines Bocamina (4)
Aragon Huesca San Juan de Plan ⓘ San Carlos mine Fanlo et al. (2004) +1 other reference
UK
England Cornwall Penzance Wherrytown ⓘ Wherry Mine Embrey et al. (1987)
St Hilary ⓘ Penberthy Croft Mine Betterton (2000)
Cumbria Allerdale Above Derwent Causey Pike Scar Crag ⓘ Cobalt Mine Mineralogical Society of America - ... +2 other references
Coledale ⓘ Scar Crags Solferino et al. (2021)
USA
Alaska Bethel Census Area McGrath Mining District ⓘ Nunatak Occurrence (south of Snowcap Mountain) ? - (2008)
Arizona Yavapai County Mayer ⓘ Unnamed small prospect Anthony et al. (1995)
Pennsylvania Montgomery County Marlborough Township Perkiomenville ⓘ Kibblehouse Quarry Mineralogical Society of America - ...
Washington Snohomish County Sultan Mining District Williamson Creek ⓘ Little Chief prospect ? Bart Cannon Collection