Chatkalite Mineral Data

General Chatkalite Information

Chemical Formula:

Cu6Fe++Sn2S8

Composition:

Molecular Weight = 931.07 gm

Iron 6.00 % Fe

Copper 40.95 % Cu

Tin 25.50 % Sn

Sulfur 27.55 % S

______

100.00 %

Empirical Formula:

Cu₆Fe²⁺Sn₂S₈

Environment:

As rounded disseminations in tetrahedite, from a sulfide-bearing quartz vein.

IMA Status:

Approved IMA 1981

Locality:

From an unspecified locality in the Chatkalo-Kuramin Mountains, eastern Uzbekistan, USSR. Link to MinDat.org Location Data.

Name Origin:

For the occurrence in the Chatkalo-Kuramin Mountains, USSR.

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Chatkalite Crystallography

Axial Ratios:

a:c = 1:0.70604

Cell Dimensions:

a = 7.61, c = 5.373, Z = 1; V = 311.16 Den(Calc)= 4.97

Crystal System:

Tetragonal - ScalenohedralH-M Symbol (4 2m) Space Group: P 4m2

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

By Intensity(I/I_o): 1.904(1), 3.11(0.8), 1.625(0.4),

Physical Properties of Chatkalite

Color:

Rose, Brown orange.

Density:

Diaphaneity:

Opaque

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Metallic

Optical Properties of Chatkalite

RL Anisotrophism:

Weak in shades of brown.

RL Color:

Pale rose.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Chatkalite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
440 nm	24.40	25.00
460 nm	25.00	25.60
480 nm	25.60	26.20
500 nm	26.20	26.70
520 nm	26.70	27.20
540 nm	27.20	27.60
560 nm	27.60	28.10
580 nm	27.90	28.60
600 nm	28.30	29.00
620 nm	28.50	29.30
640 nm	28.60	29.40
660 nm	28.60	29.50
680 nm	28.40	29.30
700 nm	27.90	28.60

**Calculated Relative Intensity Colors of Chatkalite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	350%
R₁
R₂

Calculated Properties of Chatkalite

Electron Density:

Bulk Density (Electron Density)=4.57 gm/cc
note: Specific Gravity of Chatkalite =4.97 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Chatkalite= 98.54 barns/electron
U=PE_Chatkalite x rElectron Density= 450.26 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chatkalite is Not Radioactive

Chatkalite Classification

Dana Class:

02.09.03.02 (02)Sulfides - Including Selenides and Tellurides

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

(02.09.03)Mawsonite Group

02.09.03.01 Mawsonite Cu6Fe2SnS8 P 4m2 4 2m

02.09.03.02 Chatkalite Cu6FeSn2S8 P 4m2 4 2m

02.09.03.03 Stannoidite Cu8Fe3Sn2S12 I 222 2 2 2

Strunz Class:

02.CB.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.C - Metal Sulfides, M:S = 1:1 (and similar)

02.CB -With Zn, Fe, Cu, Ag, Au, etc

02.CB.20 Chatkalite Cu6FeSn2S8 P 4m2 4 2m

02.CB.20 Mawsonite Cu6Fe2SnS8 P 4m2 4 2m

Other Chatkalite Information

References:

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

See Also:

Links to other databases for Chatkalite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Chatkalite

Cu6Fe++Sn2S8
Dana No: 02.09.03.02 Strunz No: 02.CB.20
Locality:

Notes: