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Gaotaiite Mineral Data
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General Gaotaiite Information
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 Chemical Formula: |
Ir3Te8 |
| Composition: |
Molecular Weight = 1,597.46 gm |
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Tellurium 63.90 % Te |
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Iridium 36.10 % Ir |
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______ |
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100.00 % |
| Empirical Formula: |
Ir3Te8 |
| Environment: |
A constituent of placer deposits and crushed ores of a chromium deposit. |
| IMA Status: |
Approved IMA 1995 |
| Locality: |
Near the village of Gaotai, about 200 km NNE of Beijing, People's Republic of China. Link to MinDat.org Location Data. |
| Name Origin: |
Named after its locality. |
| Name Pronunciation: |
Gaotaiite + Pronunciation  |
| Synonym: |
IMA1993-017 |
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Gaotaiite Crystallography
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| Cell Dimensions: |
a = 6.413, Z = 1; V = 263.74 Den(Calc)= 10.06 |
| Crystal System: |
Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3 |
| X Ray Diffraction: |
By Intensity(I/Io): 1.93(1), 1.132(0.9), 1.235(0.8), |
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Physical Properties of Gaotaiite
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| Cleavage: |
None |
| Color: |
Steel black. |
| Density: |
9.97 |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
| Hardness: |
3 - Calcite |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Gaotaiite
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| RL Anisotrophism: |
Weak with bluish or yellowish tint. |
| RL Bireflectance: |
Not noticable. |
| RL Color: |
Bright white with bluish tint. |
| RL Pleochroism: |
Not noticable. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Gaotaiite in Air
| λ |
R |
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∑ R(λ) |
| 470 nm |
46.60 |
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| 546 nm |
46.30 |
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| 589 nm |
46.30 |
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| 650 nm |
45.60 |
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Calculated Relative Intensity Colors of Gaotaiite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
200% |
| R |
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Calculated Properties of Gaotaiite
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| Electron Density: |
Bulk Density (Electron Density)=8.15 gm/cc
note: Specific Gravity of Gaotaiite =10.1 gm/cc.
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| Fermion Index: |
Fermion Index = 0.05
Boson Index = 0.95 |
| Photoelectric: |
PEGaotaiite = 794.05 barns/electron
U=PEGaotaiite x rElectron Density=6,470.72 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gaotaiite is Not Radioactive |
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Gaotaiite Classification
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| Dana Class: |
02.12.01.18 (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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(02.12.01)Pyrite Group (Isometric: Pa3) |
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02.12.01.01 Pyrite FeS2 P a3 2/m 3 |
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02.12.01.02 Vaesite NiS2 P a3 2/m 3 |
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02.12.01.03 Cattierite CoS2 P a3 2/m 3 |
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02.12.01.04 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3 |
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02.12.01.05 Trogtalite CoSe2 P a3 2/m 3 |
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02.12.01.06 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3 |
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02.12.01.07 Fukuchilite Cu3FeS8 P a3 2/m 3 |
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02.12.01.08 Krutaite CuSe2 P a3 2/m 3 |
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02.12.01.09 Hauerite MnS2 P a3 2/m 3 |
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02.12.01.10 Laurite RuS2 P a3 2/m 3 |
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02.12.01.11 Aurostibite AuSb2 P a3 2/m 3 |
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02.12.01.12 Krutovite NiAs2 P a3 2/m 3 |
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02.12.01.13 Sperrylite PtAs2 P a3 2/m 3 |
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02.12.01.14 Geversite Pt(Sb,Bi)2 P a3 2/m 3 |
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02.12.01.15 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3 |
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02.12.01.16 Erlichmanite OsS2 P a3 2/m 3 |
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02.12.01.17 Dzharkenite FeSe2 P a3 2/m 3 |
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02.12.01.18 Gaotaiite Ir3Te8 P a3 2/m 3 |
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02.12.01.19 Mayingite IrBiTe P a3 2/m 3 |
| Strunz Class: |
02.EB.05a 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.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc. |
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02.EB.05a Aurostibite AuSb2 P a3 2/m 3 |
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02.EB.05a Cattierite CoS2 P a3 2/m 3 |
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02.EB.05a Hauerite MnS2 P a3 2/m 3 |
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02.EB.05a Fukuchilite Cu3FeS8 P a3 2/m 3 |
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02.EB.05a Dzharkenite FeSe2 P a3 2/m 3 |
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02.EB.05a Erlichmanite OsS2 P a3 2/m 3 |
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02.EB.05a Geversite Pt(Sb,Bi)2 P a3 2/m 3 |
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02.EB.05a Gaotaiite Ir3Te8 P a3 2/m 3 |
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02.EB.05a Insizwaite Pt(Bi,Sb)2 P a3 2/m 3 |
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02.EB.05a Laurite RuS2 P a3 2/m 3 |
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02.EB.05a Krutaite CuSe2 P a3 2/m 3 |
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02.EB.05a Pyrite FeS2 P a3 2/m 3 |
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02.EB.05a Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3 |
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02.EB.05a Sperrylite PtAs2 P a3 2/m 3 |
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02.EB.05a Vaesite NiS2 P a3 2/m 3 |
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02.EB.05a Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3 |
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02.EB.05a Trogtalite CoSe2 P a3 2/m 3 |
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Other Gaotaiite Information
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| References: |
NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(MinRec, v 27, p 117) |
| See Also: |
Links to other databases for Gaotaiite :
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
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Print or Cut-and-Paste your Gaotaiite Specimen Label here :
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Gaotaiite
Ir3Te8
Dana No: 02.12.01.18 Strunz No: 02.EB.05a
Locality:
Notes:
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