Kuramite Mineral Data (original) (raw)

General Kuramite Information

Help on Chemical Formula: Chemical Formula:

Cu3SnS4

Help on Composition: Composition:

Molecular Weight = 437.61 gm

Copper 43.56 % Cu

Tin 27.13 % Sn

Sulfur 29.31 % S

______

100.00 %

Help on Empirical Formula: Empirical Formula:

Cu3SnS4

Help on Environment: Environment:

In gold-sulfide-quartz veins, as inclusions in goldfieldite.

Help on IMA Status: IMA Status:

Approved IMA 1979

Help on Locality: Locality:

Kochbulak Au-Ag-Te deposit, Chatkal-Kuraminskii (Kuramin) Mountains, Angren Region, Tashkent District, Uzbekistan. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Name for the locality.

Help on Name Pronunciation: Name Pronunciation:

Kuramite Say KURAMITE

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Kuramite Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:1.97428

Help on Cell Dimensions: Cell Dimensions:

a = 5.445, c = 10.75, Z = 2; V = 318.72 Den(Calc)= 4.56

Help on Crystal System: Crystal System:

Tetragonal - ScalenohedralH-M Symbol (4 2m) Space Group: I 42m

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.13(1), 1.914(0.8), 1.64(0.6),

Click Here for Large Kuramite Structure Window Crystal Structure:

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| | Chen X , Wada H , Sato A , Mieno M , Journal of Solid State Chemistry , 139 (1998) p.144-151, Synthesis, electrical conductivity, and crystal structure of Cu4Sn7S16 and, structure refinement of Cu2SnS3, Locality: synthetic | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Kuramite

Help on Color: Color:

Gray, Steel gray.

Help on Density: Density:

4.56

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Habit: Habit:

Inclusions - Generally found as inclusions in other minerals.

Help on Habit: Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Help on Hardness: Hardness:

5 - Apatite

Help on Luster: Luster:

Metallic

Optical Properties of Kuramite

Help on RL Anisotrophism: RL Anisotrophism:

Distinct, in shades of brown.

Help on RL Color: RL Color:

Neutral gray.

Help on Reflectivity Reflectivity

Standardized Intensity (100%) Reflection Spectra of Kuramite in Air

λ R ∑ R(λ)
440 nm 25.20
460 nm 25.30
480 nm 25.50
500 nm 26.00
520 nm 26.30
540 nm 26.50
560 nm 26.60
580 nm 26.70
600 nm 26.80
620 nm 26.70
640 nm 26.50
660 nm 26.40
680 nm 26.40
700 nm 26.30

Calculated Relative Intensity Colors of Kuramite in Air

RelativeIntensity 0% 40% 80% 100% 120% 160% 200% 240% 280% 320% 350%
R

Calculated Properties of Kuramite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=4.19 gm/cc
note: Specific Gravity of Kuramite =4.56 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Help on Photoelectric: Photoelectric:

PEKuramite = 102.91 barns/electron
U=PEKuramite x rElectron Density= 431.07 barns/cc.

Help on Radioactivity: Radioactivity:

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

Kuramite Classification

Help on Dana Class: Dana Class:

02.09.02.04 (02)Sulfides - Including Selenides and Tellurides

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

(02.09.02)Stannite Group (Tetragonal: I-42m) A2BCS type

02.09.02.01 Stannite Cu2FeSnS4 I 42m 4 2m

02.09.02.02 Cernyite Cu2CdSnS4 I 42m 4 2m

02.09.02.03 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m

02.09.02.04 Kuramite Cu3SnS4 I 42m 4 2m

02.09.02.05 Sakuraiite (Cu,Zn,Fe,In,Sn)4S4 P 432, P 43m, or P m3m Cubic

02.09.02.06 Hocartite Ag2FeSnS4 I 42m 4 2m

02.09.02.07 Pirquitasite Ag2ZnSnS4 I 42m 4 2m

02.09.02.08 Velikite Cu2HgSnS4 I 42m 4 2m

02.09.02.09 Kesterite Cu2(Zn,Fe)SnS4 I 4 4

02.09.02.10 Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m

02.09.02.11 Barquillite! Cu2CdGeS4 I 42m 4 2m

Help on Strunz Class: Strunz Class:

02.CB.15a 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.15a Cernyite Cu2CdSnS4 I 42m 4 2m

02.CB.15a Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m

02.CB.15a Kesterite Cu2(Zn,Fe)SnS4 I 4 4

02.CB.15a Hocartite Ag2FeSnS4 I 42m 4 2m

02.CB.15a Idaite Cu5FeS6 P 63/mmc 6/m 2/m 2/m

02.CB.15a Kuramite Cu3SnS4 I 42m 4 2m

02.CB.15a Pirquitasite Ag2ZnSnS4 I 42m 4 2m

02.CB.15a Stannite Cu2FeSnS4 I 42m 4 2m

02.CB.15a Velikite Cu2HgSnS4 I 42m 4 2m

Other Kuramite Information

Help on References: References:

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

Help on See Also: See Also:

Links to other databases for Kuramite :
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
15 - WWW-MINCRYST

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

Kuramite

Cu3SnS4
Dana No: 02.09.02.04 Strunz No: 02.CB.15a
Locality:

Notes: