Geversite Mineral Data

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General Geversite Information

Chemical Formula:

Pt(Sb,Bi)2

Composition:

Molecular Weight = 482.20 gm

Bismuth 21.67 % Bi

Antimony 37.87 % Sb

Platinum 40.46 % Pt

______

100.00 %

Empirical Formula:

PtSb_1.5Bi_0.5

Environment:

In concentrates of platinum minerals, derived from Pt-Fe-Ni-Cu deposits in ultramafic rocks.

IMA Status:

Approved IMA 1961

Locality:

In the Driekop mine, eastern Transvaal, South Africa. Link to MinDat.org Location Data.

Name Origin:

For Professor T.W. Gevers.

Synonym:

ICSD 43105

PDF 45-1341

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Geversite Crystallography

Cell Dimensions:

a = 6.44, Z = 4; V = 267.09 Den(Calc)= 11.99

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P a3

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

By Intensity(I/I_o): 1.94(1), 1.72(0.6), 2.92(0.4),

Physical Properties of Geversite

Color:

Steel gray.

Density:

10.97

Diaphaniety:

Opaque

Hardness:

4.5-5 - Near Apatite

Luster:

Metallic

Optical Properties of Geversite

RL Color:

Light gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Geversite in Air**
λ	R	∑ R(λ)
400 nm	58.90
420 nm	59.10
440 nm	59.30
460 nm	59.40
480 nm	59.40
500 nm	59.40
520 nm	59.20
540 nm	58.90
560 nm	58.40
580 nm	57.80
600 nm	57.40
620 nm	57.30
640 nm	57.20
660 nm	57.20
680 nm	57.40
700 nm	57.80

**Calculated Relative Intensity Colors of Geversite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%
R

Calculated Properties of Geversite

Electron Density:

r_electron=9.75 gm/cc
note: r_Geversite=12.0 gm/cc.

Fermion Index

Fermion Index = 0.13674
Boson Index = 0.86326

Photoelectric:

PE_Geversite=1,210.56 barns/electron
U=PE_Geversite x r_electron=11799.64 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Geversite is Not Radioactive

Geversite Classification

Dana Class:

2.12.1.14 (2)Sulfides - Including Selenides and Tellurides

(2.12)where Am Bn Xp, with (m+n):p=1:2

(2.12.1)Pyrite Group (Isometric: Pa3)

2.12.1.1 Pyrite FeS2 P a3 2/m 3

2.12.1.2 Vaesite NiS2 P a3 2/m 3

2.12.1.3 Cattierite CoS2 P a3 2/m 3

2.12.1.4 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3

2.12.1.5 Trogtalite CoSe2 P a3 2/m 3

2.12.1.6 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3

2.12.1.7 Fukuchilite Cu3FeS8 P a3 2/m 3

2.12.1.8 Krutaite CuSe2 P a3 2/m 3

2.12.1.9 Hauerite MnS2 P a3 2/m 3

2.12.1.10 Laurite RuS2 P a3 2/m 3

2.12.1.11 Aurostibite AuSb2 P a3 2/m 3

2.12.1.12 Krutovite NiAs2 P a3 2/m 3

2.12.1.13 Sperrylite PtAs2 P a3 2/m 3

2.12.1.14 Geversite Pt(Sb,Bi)2 P a3 2/m 3

2.12.1.15 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3

2.12.1.16 Erlichmanite OsS2 P a3 2/m 3

2.12.1.17 Dzharkenite FeSe2 P a3 2/m 3

2.12.1.18 Gaotaiite Ir3Te8 P a3 2/m 3

2.12.1.19 Mayingite IrBiTe P a3 2/m 3

Strunz Class:

II/D.17-140 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.17 - Pyrite group and related compounds, Fukuchilite - Micherenite

II/D.17-10 Fukuchilite Cu3FeS8 P a3 2/m 3

II/D.17-20 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3

II/D.17-30 Pyrite FeS2 P a3 2/m 3

II/D.17-40 Cattierite CoS2 P a3 2/m 3

II/D.17-50 Vaesite NiS2 P a3 2/m 3

II/D.17-60 Hauerite MnS2 P a3 2/m 3

II/D.17-65 Dzharkenite FeSe2 P a3 2/m 3

II/D.17-70 Krutaite CuSe2 P a3 2/m 3

II/D.17-80 Trogtalite CoSe2 P a3 2/m 3

II/D.17-90 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3

II/D.17-100 Laurite RuS2 P a3 2/m 3

II/D.17-110 Erlichmanite OsS2 P a3 2/m 3

II/D.17-120 Sperrylite PtAs2 P a3 2/m 3

II/D.17-130 Aurostibite AuSb2 P a3 2/m 3

II/D.17-140 Geversite Pt(Sb,Bi)2 P a3 2/m 3

II/D.17-150 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3

II/D.17-153 Changchengite! IrBiS P 2₁3 2 3

II/D.17-155 Mayingite IrBiTe P a3 2/m 3

II/D.17-160 Maslovite PtBiTe P 2₁3 2 3

II/D.17-170 Testibiopalladite PdTe(Sb,Te) P 2₁3 2 3

II/D.17-175 Padmaite PdBiSe P 2₁3 2 3

II/D.17-180 Michenerite (Pd,Pt)BiTe P 2₁3 2 3

Other Geversite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Geversite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Geversite

Pt(Sb,Bi)2
Dana No: 2.12.1.14 Strunz No: II/D.17-140
Locality:

Notes: