| |
 |
Kuramite Mineral Data
|
|
|
General Kuramite Information
|
 Chemical Formula: |
Cu3SnS4 |
| Composition: |
Molecular Weight = 437.61 gm |
| |
Copper 43.56 % Cu |
| |
Tin 27.13 % Sn |
| |
Sulfur 29.31 % S |
| |
______ |
| |
100.00 % |
| Empirical Formula: |
Cu3SnS4 |
| Environment: |
In gold-sulfide-quartz veins, as inclusions in goldfieldite. |
| IMA Status: |
Approved IMA 1979 |
| Locality: |
Kochbulak Au-Ag-Te deposit, Chatkal-Kuraminskii (Kuramin) Mountains, Angren Region, Tashkent District, Uzbekistan. Link to MinDat.org Location Data. |
| Name Origin: |
Name for the locality. |
| Name Pronunciation: |
Kuramite  |
| |
Kuramite Crystallography
|
| Axial Ratios: |
a:c = 1:1.97428 |
| Cell Dimensions: |
a = 5.445, c = 10.75, Z = 2; V = 318.72 Den(Calc)= 4.56 |
| Crystal System: |
Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.13(1), 1.914(0.8), 1.64(0.6), |
| |
Physical Properties of Kuramite
|
| Color: |
Gray, Steel gray. |
| Density: |
4.56 |
| Diaphaneity: |
Opaque |
| Habit: |
Inclusions - Generally found as inclusions in other minerals. |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
5 - Apatite |
| Luster: |
Metallic |
| |
Optical Properties of Kuramite
|
| RL Anisotrophism: |
Distinct, in shades of brown. |
| RL Color: |
Neutral gray. |
| 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
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
350% |
| R |
|
|
|
|
|
|
|
|
|
|
|
|
| |
Calculated Properties of Kuramite
|
| Electron Density: |
Bulk Density (Electron Density)=4.19 gm/cc
note: Specific Gravity of Kuramite =4.56 gm/cc.
|
| Fermion Index: |
Fermion Index = 0.04
Boson Index = 0.96 |
| Photoelectric: |
PEKuramite = 102.91 barns/electron
U=PEKuramite x rElectron Density= 431.07 barns/cc.
|
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kuramite is Not Radioactive |
| |
Kuramite Classification
|
| 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 |
| 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
|
| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| 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
Search for Kuramite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Kuramite :
Ask about Kuramite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espaņol
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:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.