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Shuangfengite Mineral Data
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General Shuangfengite Information
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 Chemical Formula: |
IrTe2 |
| Composition: |
Molecular Weight = 447.42 gm |
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Tellurium 57.04 % Te |
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Iridium 42.96 % Ir |
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______ |
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100.00 % |
| Empirical Formula: |
IrTe2 |
| Environment: |
Placer concentrates and crushed ores of a chromite deposit. |
| IMA Status: |
Approved IMA 1994 |
| Locality: |
Located hear the village of Shuangfeng about 190 km NNE of Beijing, People's Republic of China. Link to MinDat.org Location Data. |
| Name Origin: |
After the locality. |
| Name Pronunciation: |
Shuangfengite + Pronunciation  |
| Synonym: |
IMA1993-018 |
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Shuangfengite Crystallography
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| Axial Ratios: |
a:c = 1:1.37045 |
| Cell Dimensions: |
a = 3.933, c = 5.39, Z = 1; V = 72.21 Den(Calc)= 10.29 |
| Crystal System: |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: P 3m1 |
| X Ray Diffraction: |
By Intensity(I/Io): 2.85(1), 2.1(0.8), 1.58(0.7), |
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Physical Properties of Shuangfengite
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| Cleavage: |
{001} Perfect |
| Color: |
Black. |
| Density: |
10.14 |
| Diaphaneity: |
Opaque |
| Fracture: |
Unknown - Minerals too small to observe fractures. |
| Habit: |
Massive - Granular - Common texture observed in granite and other igneous rock. |
| Hardness: |
3 - Calcite |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Shuangfengite
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| RL Anisotrophism: |
Moderate with bluish or yellowish tint. |
| RL Bireflectance: |
Not obvious. |
| RL Color: |
Bright yellowish white with bluish tint. |
| RL Pleochroism: |
Not obvious. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Shuangfengite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 470 nm |
45.50 |
41.80 |
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| 550 nm |
45.40 |
41.80 |
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| 590 nm |
45.50 |
42.20 |
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| 650 nm |
46.00 |
42.90 |
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Calculated Relative Intensity Colors of Shuangfengite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
| R1 |
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| R2 |
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Calculated Properties of Shuangfengite
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| Electron Density: |
Bulk Density (Electron Density)=8.33 gm/cc
note: Specific Gravity of Shuangfengite =10.3 gm/cc.
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| Fermion Index: |
Fermion Index = 0.04
Boson Index = 0.96 |
| Photoelectric: |
PEShuangfengite = 874.06 barns/electron
U=PEShuangfengite x rElectron Density=7,276.98 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Shuangfengite is Not Radioactive |
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Shuangfengite Classification
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| Dana Class: |
02.12.14.06 (02)Sulfides - Including Selenides and Tellurides |
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(02.12)where Am Bn Xp, with (m+n):p=1:2 |
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(02.12.14)Melonite Group (Trigonal: P-3m1) AX2 type |
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02.12.14.01 Melonite NiTe2 P 3m1 3 2/m |
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02.12.14.02 Kitkaite NiTeSe P 3m1 3 2/m |
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02.12.14.03 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m |
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02.12.14.04 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m |
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02.12.14.05 Berndtite SnS2 P 3m1 3 2/m |
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02.12.14.06 Shuangfengite IrTe2 P 3m1 3 2/m |
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02.12.14.07 Sudovikovite! PtSe2 P 3m1 3 2/m |
| Strunz Class: |
02.EA.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.E - Metal Sulfides, M:S � 1:2 |
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02.EA -M:S = 1:2 |
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02.EA.20 Berndtite SnS2 P 3m1 3 2/m |
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02.EA.20 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m |
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02.EA.20 Melonite NiTe2 P 3m1 3 2/m |
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02.EA.20 Kitkaite NiTeSe P 3m1 3 2/m |
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02.EA.20 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m |
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02.EA.20 Sudovikovite! PtSe2 P 3m1 3 2/m |
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02.EA.20 Shuangfengite IrTe2 P 3m1 3 2/m |
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Other Shuangfengite Information
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| References: |
NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.80,p1329,1995) OPTIC PROP.(MinRec, v 27, p 120) |
| See Also: |
Links to other databases for Shuangfengite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST
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Print or Cut-and-Paste your Shuangfengite Specimen Label here :
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Shuangfengite
IrTe2
Dana No: 02.12.14.06 Strunz No: 02.EA.20
Locality:
Notes:
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