Gruzdevite Mineral Data

Gruzdevite Mineral Data +

General Gruzdevite Information

Chemical Formula:

Cu6Hg3Sb4S12

Composition:

Molecular Weight = 1,854.84 gm

Copper 20.56 % Cu

Mercury 32.44 % Hg

Antimony 26.26 % Sb

Sulfur 20.75 % S

______

100.00 %

Empirical Formula:

Cu₆Hg₃Sb₄S₁₂

Environment:

In veinlets of probable low-temperature hydrothermal origin.

IMA Status:

Approved IMA 1981

Locality:

At the Chauvai Sb-Hg deposit, southern Kirgizia, USSR. Link to MinDat.org Location Data.

Name Origin:

To honor the Russian mineralogist, V.S. Gruzdev (1938-1977).

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Gruzdevite Crystallography

Axial Ratios:

a:c = 1:0.67856

Cell Dimensions:

a = 13.9, c = 9.432, Z = 3; V = 1,578.21 Den(Calc)= 5.85

Crystal System:

Trigonal - PyramidalH-M Symbol (3) Space Group: R 3

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

By Intensity(I/I_o): 3.16(1), 1.929(0.9), 1.645(0.8),

Physical Properties of Gruzdevite

Cleavage:

None

Color:

Grayish black.

Density:

5.88

Diaphaniety:

Opaque

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Metallic

Optical Properties of Gruzdevite

RL Anisotrophism:

Weak.

RL Color:

White.

Calculated Properties of Gruzdevite

Electron Density:

r_electron=5.11 gm/cc
note: r_Gruzdevite=5.85 gm/cc.

Fermion Index

Fermion Index = 0.09953
Boson Index = 0.90047

Photoelectric:

PE_Gruzdevite= 625.30 barns/electron
U=PE_Gruzdevite x r_electron=3,194.86 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Gruzdevite is Not Radioactive

Gruzdevite Classification

Dana Class:

3.4.13.3 (3)Sulfides - Sulfosalts

(3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.4.13)Dana Group

3.4.13.1 Nowackiite Cu6Zn3As4S12 R 3 3

3.4.13.2 Aktashite Cu6Hg3As4S12 R 3 3

3.4.13.3 Gruzdevite Cu6Hg3Sb4S12 R 3 3

Strunz Class:

II/C.12-40 II - Sulfides and sulphosalts

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

II/C.12 - Tetrahedrite group, Watanabeite - Gruzdevite series

II/C.12-05 Watanabeite Cu4(As,Sb)2S5 Unk Ortho

II/C.12-10 Sinnerite Cu6As4S9 P1 1

II/C.12-20 Nowackiite Cu6Zn3As4S12 R 3 3

II/C.12-30 Aktashite Cu6Hg3As4S12 R 3 3

II/C.12-40 Gruzdevite Cu6Hg3Sb4S12 R 3 3

Other Gruzdevite Information

References:

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

See Also:

Links to other databases for Gruzdevite :
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 -École des Mines de Paris

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Print or Cut-and-Paste your Gruzdevite Specimen Label here :

Gruzdevite

Cu6Hg3Sb4S12
Dana No: 3.4.13.3 Strunz No: II/C.12-40
Locality:

Notes: