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Polkovicite

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Formula:
(Fe,Pb)3(Ge,Fe)1-xS4
Colour:
Brownish gray
Lustre:
Metallic
Hardness:
Crystal System:
Isometric
Name:
For the Polkowice Mine, Poland, the ttype locality.

Forms a series with morozeviczite. One of a few Fe- and Ge-bearing sulphide mienrals.


Hide all sections | Show all sections

Classification of PolkoviciteHide

Approved
First Published:
1975
2.CB.35a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
2.9.5.2

2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
6.2.7

6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
2 : Sulphogermanates

Pronounciation of PolkoviciteHide

Pronounciation:
PlayRecorded byCountry
Łukasz KruszewskiPoland

Physical Properties of PolkoviciteHide

Metallic
Transparency:
Opaque
Colour:
Brownish gray
Streak:
Dark gray
Hardness:
3½ on Mohs scale
Hardness:
VHN50=119 - 124 kg/mm2 - Vickers
Cleavage:
None Observed

Optical Data of PolkoviciteHide

Type:
Isotropic
Type:
Anisotropic
Anisotropism:
distinct
Reflectivity:
470nmR1=43.5-44.5%R2=%
535nmR1=43.0-44.0%R2=%
591nmR1=44.0%R2=45.0%
658nmR1=45.5%R2=46.5%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 46.5%.
R1 shown in black, R2 shown in red
Colour in reflected light:
white with cream-red tint (lighter than germanite)

Chemical Properties of PolkoviciteHide

Formula:
(Fe,Pb)3(Ge,Fe)1-xS4
Common Impurities:
Cu,As

Crystallography of PolkoviciteHide

Crystal System:
Isometric
Cell Parameters:
a = 10.61 Å
Unit Cell V:
1,194.39 ų (Calculated from Unit Cell)

Type Occurrence of PolkoviciteHide

General Appearance of Type Material:
massive
Place of Conservation of Type Material:
Jagellonian University, Kraków, Poland.
Geological Setting of Type Material:
in epigenetic veinlets and zones of metasomatic replacement of sandstone and older sulfides, within brecciated sandstones beneath black Cu-bearing Zechstein shales
Associated Minerals at Type Locality:
Reference:
Harańczyk, C. (1975) Morozeviczite and polkovicite, typochemical minerals of Mesozoic mineralization of the Fore-Sudeten monocline. Rudy i Metale: 20: 288–293.

Synonyms of PolkoviciteHide

Other Language Names for PolkoviciteHide

German:Polkovicit
Spanish:Polkovicita

Relationship of Polkovicite to other SpeciesHide

Related Minerals - Nickel-Strunz GroupingHide

2.CB.AgmantiniteAg2MnSnS4Orth.
2.CB.05aColoradoiteHgTeIso. m3m (4/m 3 2/m)
2.CB.05aHawleyiteCdSIso. 4 3m : F4 3m
2.CB.05aMetacinnabarHgSIso. 4 3m : F4 3m
2.CB.05cPolhemusite(Zn,Hg)STet.
2.CB.05bSakuraiite(Cu,Zn,Fe)3(In,Sn)S4 Iso.
2.CB.05aSphaleriteZnSIso. 4 3m : F4 3m
2.CB.05aStilleiteZnSe
2.CB.05aTiemanniteHgSeIso. 4 3m : F4 3m
2.CB.05UM1998-15-S:CuFeZnCu2Fe3Zn5S10
2.CB.05aRudashevskyite(Fe,Zn)SIso. 4 3m : F4 3m
2.CB.10aChalcopyriteCuFeS2Tet. 4 2m : I4 2d
2.CB.10aEskeborniteCuFeSe2Tet.
2.CB.10aGalliteCuGaS2Tet. 4 2m : I4 2d
2.CB.10bHaycockiteCu4Fe5S8Orth. 2 2 2
2.CB.10aLenaiteAgFeS2Tet. 4 2m : I4 2d
2.CB.10bMooihoekiteCu9Fe9S16Tet.
2.CB.10bPutoraniteCu1.1Fe1.2S2Iso.
2.CB.10aRoquesiteCuInS2Tet. 4 2m : I4 2d
2.CB.10bTalnakhiteCu9(Fe,Ni)8S16Iso. 4 3m : I4 3m
2.CB.10aLaforêtiteAgInS2Tet. 4 2m : I4 2d
2.CB.15aČernýiteCu2(Cd,Zn,Fe)SnS4Tet. 4 2m : I4 2m
2.CB.15aFerrokësteriteCu2(Fe,Zn)SnS4Tet. 4 : I4
2.CB.15aHocartiteAg2(Fe2+,Zn)SnS4Tet. 4 2m : I4 2m
2.CB.15aIdaiteCu5FeS6Hex.
2.CB.15aKësterite Cu2ZnSnS4Tet. 4 : I4
2.CB.15aKuramiteCu3SnS4Tet.
2.CB.15bMohiteCu2SnS3Mon.
2.CB.15aPirquitasiteAg2ZnSnS4Tet. 4 : I4
2.CB.15aStanniteCu2FeSnS4Tet. 4 2m : I4 2m
2.CB.15cStannoiditeCu+6Cu2+2(Fe2+,Zn)3Sn2S12Orth.
2.CB.15aVelikiteCu2HgSnS4Tet.
2.CB.15cUM2006-11-S:CuFeGeZnCu8(Fe,Zn)3Ge2S12 (?)
2.CB.20ChatkaliteCu6FeSn2S8Tet. 4 2m : P4m2
2.CB.20MawsoniteCu6Fe2SnS8Tet. 4 2m : P4m2
2.CB.30ColusiteCu13VAs3S16Iso. 4 3m : P4 3n
2.CB.30GermaniteCu13Fe2Ge2S16Iso. 4 3m : P4 3n
2.CB.30GermanocolusiteCu26V2(Ge,As)6S32Iso.
2.CB.30NekrasoviteCu26V2(Sn,As,Sb)6S32Iso.
2.CB.30StibiocolusiteCu13V(Sb,Sn,As)3S16Iso.
2.CB.30Ovamboite Cu20(Fe,Cu,Zn)6W2Ge6S32Iso.
2.CB.30MaikainiteCu20(Fe,Cu)6Mo2Ge6S32
2.CB.35aHemusiteCu6SnMoS8Iso.
2.CB.35aKiddcreekiteCu6SnWS8Iso. 4 3m : F4 3m
2.CB.35aRenierite(Cu1+,Zn)11Fe4(Ge4+,As5+)2S16Tet. 4 2m : P4 2c
2.CB.35aVincienniteCu+7Cu2+3Fe2+2Fe3+2Sn(As,Sb)S16Tet.
2.CB.35aMorozeviczite(Pb,Fe)3Ge1-xS4Iso.
2.CB.35bCatamarcaiteCu6GeWS8Hex. 6mm : P63mc
2.CB.40LautiteCuAsSOrth. mmm (2/m 2/m 2/m) : Pnma
2.CB.45CadmoseliteCdSeHex. 6mm : P63mc
2.CB.45GreenockiteCdSHex. 6mm : P63mc
2.CB.45Wurtzite(Zn,Fe)SHex. 6mm : P63mc
2.CB.45RambergiteMnSHex. 6mm : P63mc
2.CB.45Buseckite(Fe,Zn,Mn)SHex. 6mm : P63mc
2.CB.55aCubaniteCuFe2S3Orth. mmm (2/m 2/m 2/m)
2.CB.55bIsocubaniteCuFe2S3Iso. m3m (4/m 3 2/m) : Fm3m
2.CB.60PicotpauliteTlFe2S3Orth. mmm (2/m 2/m 2/m) : Cmcm
2.CB.60RaguiniteTlFeS2Orth.
2.CB.65ArgentopyriteAgFe2S3Mon. 2/m
2.CB.65SternbergiteAgFe2S3Orth. mmm (2/m 2/m 2/m)
2.CB.70SulvaniteCu3VS4Iso.
2.CB.75VulcaniteCuTeOrth.
2.CB.80EmpressiteAgTeOrth. mmm (2/m 2/m 2/m)
2.CB.85MuthmanniteAuAgTe2Mon. 2/m : P2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

2.9.5.1Morozeviczite(Pb,Fe)3Ge1-xS4Iso.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

6.2.1GermaniteCu13Fe2Ge2S16Iso. 4 3m : P4 3n
6.2.2BriartiteCu2(Fe,Zn)GeS4Tet.
6.2.3Renierite(Cu1+,Zn)11Fe4(Ge4+,As5+)2S16Tet. 4 2m : P4 2c
6.2.4ArgyroditeAg8GeS6Orth. mm2 : Pna21
6.2.5CanfielditeAg8SnS6Orth. mm2
6.2.6Morozeviczite(Pb,Fe)3Ge1-xS4Iso.

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.

References for PolkoviciteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Harańczyk, C. (1975) Morozeviczite and polkovicite, typochemical minerals of Mesozoic mineralization of the Fore-Sudeten monocline. Rudy i Metale: 20: 288–293 (in Polish)
Fleischer, M., Pabst, A. (1981) New mineral names. American Mineralogist: 66: 436-439.
Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)

Internet Links for PolkoviciteHide

Localities for PolkoviciteHide

ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Poland (TL)
 
  • Lower Silesia
    • Legnica
      • Polkowice District
Rudi i Metale Niezelazne (1975) 20/6, 288-293; American Mineralogist, volume 66, pp. 437-438 (1981); Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
Mineral and/or Locality  
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