Gaotaiite Mineral Data

General Gaotaiite Information

Chemical Formula:

Ir3Te8

Composition:

Molecular Weight = 1,597.46 gm

Tellurium 63.90 % Te

Iridium 36.10 % Ir

______

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

Cell Dimensions:

a = 6.413, Z = 1; V = 263.74 Den(Calc)= 10.06

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P a3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 1.93(1), 1.132(0.9), 1.235(0.8),

Physical Properties of Gaotaiite

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

Optical Properties of Gaotaiite

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	∑ R(λ)
470 nm	46.60
546 nm	46.30
589 nm	46.30
650 nm	45.60

**Calculated Relative Intensity Colors of Gaotaiite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	200%
R

Calculated Properties of Gaotaiite

Electron Density:

Bulk Density (Electron Density)=8.15 gm/cc
note: Specific Gravity of Gaotaiite =10.1 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Gaotaiite= 794.05 barns/electron
U=PE_Gaotaiite x rElectron Density=6,470.72 barns/cc.

Radioactivity:

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

Gaotaiite Classification

Dana Class:

02.12.01.18 (02)Sulfides - Including Selenides and Tellurides

(02.12)where Am Bn Xp, with (m+n):p=1:2

(02.12.01)Pyrite Group (Isometric: Pa3)

02.12.01.01 Pyrite FeS2 P a3 2/m 3

02.12.01.02 Vaesite NiS2 P a3 2/m 3

02.12.01.03 Cattierite CoS2 P a3 2/m 3

02.12.01.04 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3

02.12.01.05 Trogtalite CoSe2 P a3 2/m 3

02.12.01.06 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3

02.12.01.07 Fukuchilite Cu3FeS8 P a3 2/m 3

02.12.01.08 Krutaite CuSe2 P a3 2/m 3

02.12.01.09 Hauerite MnS2 P a3 2/m 3

02.12.01.10 Laurite RuS2 P a3 2/m 3

02.12.01.11 Aurostibite AuSb2 P a3 2/m 3

02.12.01.12 Krutovite NiAs2 P a3 2/m 3

02.12.01.13 Sperrylite PtAs2 P a3 2/m 3

02.12.01.14 Geversite Pt(Sb,Bi)2 P a3 2/m 3

02.12.01.15 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3

02.12.01.16 Erlichmanite OsS2 P a3 2/m 3

02.12.01.17 Dzharkenite FeSe2 P a3 2/m 3

02.12.01.18 Gaotaiite Ir3Te8 P a3 2/m 3

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

02.E - Metal Sulfides, M:S £ 1:2

02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc.

02.EB.05a Aurostibite AuSb2 P a3 2/m 3

02.EB.05a Cattierite CoS2 P a3 2/m 3

02.EB.05a Hauerite MnS2 P a3 2/m 3

02.EB.05a Fukuchilite Cu3FeS8 P a3 2/m 3

02.EB.05a Dzharkenite FeSe2 P a3 2/m 3

02.EB.05a Erlichmanite OsS2 P a3 2/m 3

02.EB.05a Geversite Pt(Sb,Bi)2 P a3 2/m 3

02.EB.05a Gaotaiite Ir3Te8 P a3 2/m 3

02.EB.05a Insizwaite Pt(Bi,Sb)2 P a3 2/m 3

02.EB.05a Laurite RuS2 P a3 2/m 3

02.EB.05a Krutaite CuSe2 P a3 2/m 3

02.EB.05a Pyrite FeS2 P a3 2/m 3

02.EB.05a Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3

02.EB.05a Sperrylite PtAs2 P a3 2/m 3

02.EB.05a Vaesite NiS2 P a3 2/m 3

02.EB.05a Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3

02.EB.05a Trogtalite CoSe2 P a3 2/m 3

Other Gaotaiite Information

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 :

Gaotaiite

Ir3Te8
Dana No: 02.12.01.18 Strunz No: 02.EB.05a
Locality:

Notes: