Polkovicite Mineral Data

Polkovicite Mineral Data +

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General Polkovicite Information

Chemical Formula:

(Fe,Pb)3(Ge,Fe)1-xS4

Composition:

Molecular Weight = 470.48 gm

Iron 29.68 % Fe

Germanium 10.03 % Ge

Lead 33.03 % Pb

Sulfur 27.26 % S

______

100.00 %

Empirical Formula:

Fe²⁺_2.25Pb_0.75Ge_0.65Fe²⁺_0.25S₄

IMA Status:

Approved IMA 1979

Locality:

Link to MinDat.org Location Data.

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Polkovicite Crystallography

Cell Dimensions:

a = 10.61, Z = 8; V = 1,194.39 Den(Calc)= 5.23

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.08(1), 2.15(0.9), 2.8(0.6),

Physical Properties of Polkovicite

Cleavage:

None

Color:

Brownish gray.

Density:

6.62

Diaphaniety:

Opaque

Hardness:

3.5 - Copper Penny

Luster:

Metallic

Streak:

dark gray

Calculated Properties of Polkovicite

Electron Density:

r_electron=4.70 gm/cc
note: r_Polkovicite=5.23 gm/cc.

Fermion Index

Fermion Index = 0.08915
Boson Index = 0.91085

Photoelectric:

PE_Polkovicite= 582.11 barns/electron
U=PE_Polkovicite x r_electron=2,734.62 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Polkovicite is Not Radioactive

Polkovicite Classification

Dana Class:

2.9.5.2 (2)Sulfides - Including Selenides and Tellurides

(2.9)where Am Bn Xp, with (m+n):p=1:1

(2.9.5)Dana Group

2.9.5.1 Morozeviczite (Pb,Fe)3Ge1-xS4 F d3m 4/m 3 2/m

2.9.5.2 Polkovicite (Fe,Pb)3(Ge,Fe)1-xS4 F d3m 4/m 3 2/m

Strunz Class:

II/C.10-70 II - Sulfides and sulphosalts

II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1

II/C.10 - Stannite group, Germanite series

II/C.10-10 Renierite (Cu,Zn)11(Ge,As)2Fe4S16 P 4₂c- 4 2m

II/C.10-15 Vinciennite Cu10Fe4Sn(As,Sb)S16 P 4₁22 4 2 2

II/C.10-20 Germanite Cu26Fe4Ge4S32 P 43n 4 3m

II/C.10-30 Nekrasovite Cu26V2(Sn,As,Sb)6S32 P 43n 4 3m

II/C.10-40 Colusite Cu12-13V(As,Sb,Sn,Ge)3S16 P 43n 4 3m

II/C.10-45 Stibiocolusite Cu13V(Sb,As,Sn)3S16 P 43n 4 3m

II/C.10-47 Germanocolusite Cu13V(Ge,As)3S16 P 43n 4 3m

II/C.10-50 Arsenosulvanite Cu3(As,V)S4 P 43m 4 3m

II/C.10-50* Maikainite! Cu20(Fe,Cu)6Mo2Ge6S32 P 43n 4 3m

II/C.10-55 Ovamboite! Cu20(Fe,Cu,Zn)6W2Ge6S32 P 43n 4 3m

II/C.10-60 Sulvanite Cu3VS4 P 43m 4 3m

II/C.10-70 Polkovicite (Fe,Pb)3(Ge,Fe)1-xS4 F d3m 4/m 3 2/m

II/C.10-80 Morozeviczite (Pb,Fe)3Ge1-xS4 F d3m 4/m 3 2/m

Other Polkovicite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Polkovicite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Polkovicite

(Fe,Pb)3(Ge,Fe)1-xS4
Dana No: 2.9.5.2 Strunz No: II/C.10-70
Locality:

Notes: