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Stannoidite Mineral Data
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General Stannoidite Information
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 Chemical Formula: |
Cu8Fe3Sn2S12 |
| Composition: |
Molecular Weight = 1,298.12 gm |
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Iron 12.91 % Fe |
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Copper 39.16 % Cu |
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Tin 18.29 % Sn |
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Sulfur 29.64 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu8Fe2+3Sn2S12 |
| Environment: |
In hydrothermal Cu-Sn deposits. |
| IMA Status: |
Approved IMA 1969 |
| Locality: |
Konjo mine, Okayama Prefecture, Japan. Link to MinDat.org Location Data. |
| Name Origin: |
Named for its similarity to stannite. |
| Name Pronunciation: |
Stannoidite + Pronunciation  |
| Synonym: |
ICSD 41894 |
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PDF 22-237 |
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Stannoidite Image |
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Images:
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Stannoidite
Comments: Polished section (PPL) image showing a rim of V-stannoidite on colusite (co) grain in massive bornite (bn).
Location: Kidd Creek Volcanogenic Massive Sulfide deposit, Western Abitibi Subprovince, Timmins, Ontario, Canada.
Scale: Picture Size 0.25 mm.
© National Resouces of Canada |
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Stannoidite Crystallography
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| Axial Ratios: |
a:b:c =1.9925:1:2.9796 |
| Cell Dimensions: |
a = 10.76, b = 5.4, c = 16.09, Z = 2; V = 934.89 Den(Calc)= 4.61 |
| Crystal System: |
Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: I 222 |
| X Ray Diffraction: |
By Intensity(I/Io): 3.11(1), 1.906(0.7), 1.621(0.2), |
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Physical Properties of Stannoidite
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| Cleavage: |
None |
| Color: |
Brass brown. |
| Density: |
4.29 |
| Diaphaneity: |
Opaque |
| Fracture: |
Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments. |
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
| Hardness: |
4 - Fluorite |
| Luster: |
Metallic |
| Streak: |
brown gray |
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Optical Properties of Stannoidite
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| RL Anisotrophism: |
Strong, dark orange-red to yellow-gray. |
| RL Color: |
Pinkish brown. |
| RL Pleochroism: |
Distinct, light salmon-brown to brown. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Stannoidite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
19.50 |
20.40 |
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| 420 nm |
19.40 |
20.80 |
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| 440 nm |
19.30 |
21.20 |
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| 460 nm |
19.60 |
21.70 |
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| 480 nm |
20.30 |
22.40 |
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| 500 nm |
21.20 |
23.30 |
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| 520 nm |
22.20 |
24.20 |
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| 540 nm |
23.40 |
25.20 |
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| 560 nm |
24.60 |
26.30 |
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| 580 nm |
25.90 |
27.50 |
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| 600 nm |
27.10 |
28.70 |
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| 620 nm |
28.30 |
30.00 |
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| 640 nm |
29.50 |
31.20 |
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| 660 nm |
30.60 |
32.30 |
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| 680 nm |
31.70 |
33.40 |
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| 700 nm |
32.60 |
34.20 |
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Calculated Relative Intensity Colors of Stannoidite in Air
Relative
Intensity |
0% |
50% |
100% |
150% |
200% |
250% |
300% |
350% |
400% |
450% |
| R1 |
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| R2 |
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Calculated Properties of Stannoidite
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| Electron Density: |
Bulk Density (Electron Density)=4.28 gm/cc
note: Specific Gravity of Stannoidite =4.61 gm/cc.
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| Fermion Index: |
Fermion Index = 0.03
Boson Index = 0.97 |
| Photoelectric: |
PEStannoidite = 77.74 barns/electron
U=PEStannoidite x rElectron Density= 332.42 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stannoidite is Not Radioactive |
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Stannoidite Classification
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| Dana Class: |
02.09.03.03 (02)Sulfides - Including Selenides and Tellurides |
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(02.09)where Am Bn Xp, with (m+n):p=1:1 |
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(02.09.03)Mawsonite Group |
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02.09.03.01 Mawsonite Cu6Fe2SnS8 P 4m2 4 2m |
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02.09.03.02 Chatkalite Cu6FeSn2S8 P 4m2 4 2m |
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02.09.03.03 Stannoidite Cu8Fe3Sn2S12 I 222 2 2 2 |
| Strunz Class: |
02.CB.15c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.C - Metal Sulfides, M:S = 1:1 (and similar) |
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02.CB -With Zn, Fe, Cu, Ag, Au, etc |
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02.CB.15c Stannoidite Cu8Fe3Sn2S12 I 222 2 2 2 |
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Other Stannoidite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Stannoidite :
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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Stannoidite
Cu8Fe3Sn2S12
Dana No: 02.09.03.03 Strunz No: 02.CB.15c
Locality:
Notes:
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