Catamarcaite Mineral Data

Catamarcaite Mineral Data

General Catamarcaite Information

Chemical Formula:

Cu6GeWS8

Composition:

Molecular Weight = 894.26 gm

Copper 42.64 % Cu

Germanium 8.12 % Ge

Tungsten 20.56 % W

Sulfur 28.69 % S

______

100.00 %

Empirical Formula:

Cu₆GeWS₈

IMA Status:

Proposed IMA 2003 (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals and Mineral Names (CNMMN)

Synonym:

IMA2003-020

Catamarcaite Image

Images:

Click Here for Larger Catamarcaite Image

Catamarcaite Putzite

Comments: Polished section of putzite (pu) grain in close association with unnamed Cu8Fe2ZnGe2S12 (un1) and catamarcaite (ca), as inclusions in chalcocite-sphalerite (cc/sp) (CanMin 42:1761).
Location: Old dumps near the Rosario vein, Capillitas mining district, Department of Andalgal?, Catamarca Province, Argentina.. Scale: See Image.
© Canadian Mineralogist

Catamarcaite Crystallography

Axial Ratios:

a:c = 1:1.64615

Cell Dimensions:

a = 7.523, c = 12.384, Z = 4; V = 606.98 Den(Calc)= 9.79

Crystal System:

HexagonalSpace Group: P 6₃/mmc, P 6₂c or P 6₃mc

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

By Intensity(I/I_o): 5.78(1), 1.881(0.8), 1.744(0.5),1.971(0.5), 2.417(0.4), 2.887(0.4), 3.153(0.4), 6.18(0.4),

Physical Properties of Catamarcaite

Color:

Gray.

Diaphaniety:

Opaque

Luster:

Metallic

Optical Properties of Catamarcaite

RL Anisotrophism:

Weak.

RL Bireflectance:

Weak.

RL Color:

Grayish white with a distinct brownish tine with red internal reflections.

RL Pleochroism:

None.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Catamarcaite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	24.50	25.20
546 nm	24.10	24.50
589 nm	24.50	25.10
650 nm	23.40	23.70

**Calculated Relative Intensity Colors of Catamarcaite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	360%	370%
R₁
R₂

Calculated Properties of Catamarcaite

Electron Density:

r_electron=8.93 gm/cc
note: r_Catamarcaite=9.79 gm/cc.

Fermion Index

Fermion Index = 0.03784
Boson Index = 0.96216

Photoelectric:

PE_Catamarcaite= 269.52 barns/electron
U=PE_Catamarcaite x r_electron=2,407.70 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Catamarcaite is Not Radioactive

Catamarcaite Classification

Dana Class:

2.9.14.2 (2)Sulfides - Including Selenides and Tellurides

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

(2.9.14)Dana Group

2.9.14.1 Idaite Cu5FeS6 P 6₃/mmc 6/m 2/m 2/m

2.9.14.2 Catamarcaite ! Cu6GeWS8 P 6₃/mmc, P 6₂c or P 6₃mc Hex

Strunz Class:

II/X.00-00 II - Sulfides and sulphosalts

II/X - Unclassified Strunz Sulfides and sulphosalts

II/X.00 - Sulfide

Other Catamarcaite Information

See Also:

Links to other databases for Catamarcaite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Catamarcaite

Cu6GeWS8
Dana No: 2.9.14.2 Strunz No: II/X.00-00
Locality:

Notes: