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Arsenopyrite

A valid IMA mineral species
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Named in 1847 by Ernst Friedrich Glocker for its composition, a contraction of the antiquated term "arsenical pyrite." Arsenopyrite was known much before 1847 and arsenopyrite, as a name, may be taken as a simple translation of "arsenkies".
Arsenopyrite Group.

Arsenopyrite is closely related toalloclasite, but is not an exact analogue, because of different As-S and S-As ordering.

Arsenopyrite may contain up to about 9 wt% Co; with higher Co contents,glaucodot will appear as a separate phase (Gammon, 1966).

May be confused with the iron arsenidelöllingite.




Unique Identifiers

Classification of Arsenopyrite

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 7th ed.:
2.12.4.1
Dana 8th ed.:
2.12.4.1

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
Hey's CIM Ref.:
3.9.12

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

Mineral Symbols
Transparency:
Opaque
Colour:
Silver-white to steel-gray, may have a slight yellow appearance
Comment:
Tarnished material common, some iridescent
Streak:
Gray-black
Hardness:
5½ - 6 onMohs scale
Hardness:
VHN100=1081 kg/mm2 - Vickers
Comment:
VHN on (001) section
Tenacity:
Brittle
Cleavage:
Distinct/Good
Distinct on {001}; {010} in traces
Fracture:
Irregular/Uneven
Density:
6.07(15) g/cm3 (Measured)    6.18 g/cm3 (Calculated)

Optical Data of Arsenopyrite
Common Impurities:
Ag,Au,Co,Sn,Ni,Sb,Bi,Cu,Pb

Crystallography of Arsenopyrite
Click on an icon to view
Arsenopyrite no.5 - Goldschmidt (1913-1926)
Arsenopyrite no.12 - Goldschmidt (1913-1926)
Arsenopyrite no.14 - Goldschmidt (1913-1926)
Arsenopyrite no.62 - Goldschmidt (1913-1926)
Arsenopyrite no.64 - Goldschmidt (1913-1926)
Arsenopyrite no.113 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided bywww.smorf.nl.

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Opaque |Translucent |Transparent

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Crystal StructureYaogangxian mine, Yizhang County, Hunan Province, China 687
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
3.658 Å(40)
2.866 Å(5)
2.838 Å(30)
2.796 Å(10)
2.677 Å(100)
2.662 Å(100)
2.557 Å(10)
2.440 Å(90)
2.418 Å(95)
2.412 Å(95)
2.204 Å(25)
2.095 Å(20)
2.017 Å(5)
1.961 Å(50)
1.943 Å(25)
1.824 Å(70)
1.814 Å(90)
1.787 Å(5)
1.759 Å(20)
1.750 Å(5)
1.703 Å(5)
1.631 Å(30)
1.608 Å(25)
1.594 Å(15)
1.589 Å(20)
1.543 Å(20)
1.537 Å(20)
1.390 Å(5)
1.343 Å(15)
Comments:
ICDD 14-218 (Freiberg, Germany)

Geological Environment

Other Language Names for Arsenopyrite

Varieties of ArsenopyriteDanaiteA Co-bearing variety of arsenopyrite.
Originally described from Franconia, Grafton Co., New Hampshire, USA.

NB: Not to be confused withDanalite, a species in the helvine group.

Relationship of Arsenopyrite to other Species
Other Members of Arsenopyrite Group:
Glaucodot(Co0.50Fe0.50)AsSOrth.mm2 :Pmn21
GudmunditeFeSbSMon. 2/m :P21/b
Osarsite(Os,Ru)AsSMon.
Ruarsite(Ru,Os)AsSMon.

Common AssociatesIso.m3(2/m3) :Pa32.EB.AndrieslombaarditeRhSbSIso. 23 :P2132.EB.Iridarsenite(Ir,Ru)As2Mon. 2/m :P21/b2.EB.Kanatzidisite(SbBiS3)2Te2Mon. 2/m :P21/m2.EB.05aVaesiteNiS2Iso.m3(2/m3) :Pa32.EB.05aHaueriteMnS2Iso.m3(2/m3) :Pa32.EB.05aLauriteRuS2Iso.m3(2/m3) :Pa32.EB.05aGaotaiiteIr3Te8Iso.m3(2/m3) :Pa32.EB.05aPenroseite(Ni,Co,Cu)Se2Iso.m3(2/m3) :Pa32.EB.05aFukuchiliteCu3FeS8Iso.m3(2/m3) :Pa32.EB.05aVillamanínite(Cu,Ni,Co,Fe)S2Tric.2.EB.05aErlichmaniteOsS2Iso.m3(2/m3) :Pa32.EB.05aSperrylitePtAs2Iso.m3(2/m3) :Pa32.EB.05aGeversitePtSb2Iso.m3(2/m3) :Pa32.EB.05aCattieriteCoS2Iso.m3(2/m3) :Pa32.EB.05aAurostibiteAuSb2Iso.m3(2/m3) :Pa32.EB.05aTrogtaliteCoSe2Iso.m3(2/m3) :Pa32.EB.05a vCayeuxite2.EB.05aKruťaiteCuSe2Iso.m3(2/m3) :Pa32.EB.05aPyriteFeS2Iso.m3(2/m3) :Pa32.EB.05aInsizwaitePtBi2Iso.m3(2/m3) :Pa32.EB.05bBambollaiteCu(Se,Te)2Tet.2.EB.05aDzharkeniteFeSe2Iso.m3(2/m3) :Pa32.EB.10aMarcasiteFeS2Orth.mmm(2/m2/m2/m) :Pnnm2.EB.10eParacostibiteCoSbSOrth.mmm(2/m2/m2/m) :Pbca2.EB.10fOeniteCoSbAsOrth.2.EB.10ePararammelsbergiteNiAs2Orth.mmm(2/m2/m2/m) :Pbca2.EB.10aMattagamiteCoTe2Orth.mmm(2/m2/m2/m) :Pnnm2.EB.10aFrohbergiteFeTe2Orth.mmm(2/m2/m2/m) :Pnnm2.EB.10dCostibiteCoSbSOrth.mm2 :Pmn212.EB.10bAlloclasiteCo1-xFexAsSMon. 2 :P212.EB.10cGlaucodot(Co0.50Fe0.50)AsSOrth.mm2 :Pmn212.EB.10aPetříčekiteCuSe2Orth.mmm(2/m2/m2/m) :Pnnm2.EB.10aKulleruditeNiSe2Orth.mmm(2/m2/m2/m) :Pnnm2.EB.10aFerroseliteFeSe2Orth.mmm(2/m2/m2/m) :Pnnm2.EB.15bSeinäjokiteFeSb2Orth.2.EB.15aRammelsbergiteNiAs2Orth.mmm(2/m2/m2/m) :Pnnm2.EB.15aClinosaffloriteCoAs2Mon. 2/m :P21/m2.EB.15cPaxiteCuAs2Mon. 2/m :P21/b2.EB.15aNisbiteNiSb2Orth.mmm(2/m2/m2/m) :Pnnm2.EB.15aLöllingiteFeAs2Orth.mmm(2/m2/m2/m) :Pnnm2.EB.15aSafflorite(Co,Ni,Fe)As2Orth.mmm(2/m2/m2/m) :Pnnm2.EB.15aOmeiite(Os,Ru)As2Orth.2.EB.15aAnduoite(Ru,Os)As2Orth.2.EB.20Ruarsite(Ru,Os)AsSMon.2.EB.20Osarsite(Os,Ru)AsSMon.2.EB.20GudmunditeFeSbSMon. 2/m :P21/b2.EB.25MayingiteIrBiTeIso.m3(2/m3) :Pa32.EB.25MaslovitePtBiTeIso. 23 :P2132.EB.25ParagersdorffiteNi(As,S)2Iso.m3(2/m3) :Pa32.EB.25OrthogersdorffiteNiAsSOrth.mm2 :Pca212.EB.25SulfopadmaitePdBiSIso. 23 :P2132.EB.25JolliffeiteNiAsSeIso.m3(2/m3) :Pa32.EB.25CobaltiteCoAsSOrth.mm2 :Pca212.EB.25GuixiangiteNiBiSIso. 23 :P2132.EB.25TestibiopalladitePdSbTeIso.2.EB.25 vaAntimony-bearing GersdorffiteNi(As,Sb)S2.EB.25KalungaitePdAsSeIso.m3(2/m3) :Pa32.EB.25Hollingworthite(Rh,Pt,Pd)AsSIso.m3(2/m3) :Pa32.EB.25MicheneritePdBiTeIso. 23 :P2132.EB.25GersdorffiteNiAsSIso. 23 :P2132.EB.25MilotaitePdSbSeIso. 23 :P2132.EB.25TolovkiteIrSbSIso.2.EB.25PlatarsitePt(As,S)2Iso.m3(2/m3) :Pa32.EB.25WillyamiteCoSbS2.EB.25ChangchengiteIrBiSIso. 23 :P2132.EB.25KvačekiteNiSbSeIso. 23 :P2132.EB.25KrutoviteNiAs2Iso. 23 :P2132.EB.25PadmaitePdBiSeIso. 4322.EB.25UllmanniteNiSbSIso. 23 :P2132.EB.25Irarsite(Ir,Ru,Rh,Pt)AsSIso.m3(2/m3) :Pa32.EB.30UrvantsevitePd(Bi,Pb)2Tet. 4/mmm(4/m2/m2/m) :I4/mmm2.EB.35RheniiteReS2Tric.1 :P1

Fluorescence of Arsenopyrite

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    • References for ArsenopyriteⓘKami MineCollections of Alfredo Petrov and Dr. ...
    Canada
     
    Grice et al. (1977)+1 other referenceSabina (1964)+1 other reference
    China
     
    Keqin Xu (1957)+8 other references
    Czech Republic
     
    Roman Gramblicka collection
    Ecuador
     
    Collected by Alejandro Felix Gutierrez (2013)
    France
     
    Pierrot et al. (1975)
    Ireland
     
    Flannery (n.d.)
    Italy
     
    Biagioni (2009)
    Japan
     
    Sadanaga et al. (1974)+1 other reference
    Kosovo
     
    Féraud J. (1979)+4 other references
    Norway
     
    Nordrum (2007)
    Peru
     
    Imai et al. (1985)+1 other reference- (1997)Crowley et al. (1997)
    Portugal
     
    335-354+10 other references
    Russia
     
    Dobovol'skaya et al. (1990)+3 other references
    Spain
     
    Mesa et al. (2002)+2 other referencesAguado González (1985)+3 other references
    USA
     
    Mike Polletta and Jeremy Zolan field ...Schairer (1931)+2 other referencesIdentified by Jeremy ZolanMoritz (n.d.)New York State Museum Bull. 223 et al. (July-August 1919)
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