Shuangfengite Mineral Data

Shuangfengite Mineral Data +

General Shuangfengite Information

Chemical Formula:

IrTe2

Composition:

Molecular Weight = 447.42 gm

Tellurium 57.04 % Te

Iridium 42.96 % Ir

______

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.

Synonym:

IMA1993-018

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Shuangfengite Crystallography

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 ScalenohedralH-M Symbol (3 2/m) Space Group: P 3m1

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

By Intensity(I/I_o): 2.85(1), 2.1(0.8), 1.58(0.7),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Wyckoff R W G , Crystal Structures , 1 (1963) p.239-444, Second edition. Interscience Publishers, New York, New York, Note: cadmium iodide structure

Physical Properties of Shuangfengite

Cleavage:

[001] Perfect

Color:

Black.

Density:

10.14

Diaphaniety:

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

Optical Properties of Shuangfengite

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	∑ R₁(λ)	∑ R₂(λ)
470 nm	45.50	41.80
550 nm	45.40	41.80
590 nm	45.50	42.20
650 nm	46.00	42.90

**Calculated Relative Intensity Colors of Shuangfengite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%
R₁
R₂

Calculated Properties of Shuangfengite

Electron Density:

r_electron=8.33 gm/cc
note: r_{Shuangfengite}=10.3 gm/cc.

Fermion Index

Fermion Index = 0.04557
Boson Index = 0.95443

Photoelectric:

PE_{Shuangfengite}= 874.06 barns/electron
U=PE_{Shuangfengite} x r_electron=7,276.98 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Shuangfengite is Not Radioactive

Shuangfengite Classification

Dana Class:

2.12.14.6 (2)Sulfides - Including Selenides and Tellurides

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

(2.12.14)Melonite Group (Trigonal: P3¯m1) AX2 type

2.12.14.1 Melonite NiTe2 P 3m1 3 2/m

2.12.14.2 Kitkaite NiTeSe P 3m1 3 2/m

2.12.14.3 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m

2.12.14.4 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m

2.12.14.5 Berndtite SnS2 P 3m1 3 2/m

2.12.14.6 Shuangfengite IrTe2 P 3m1 3 2/m

2.12.14.7 Sudovikovite! PtSe2 P 3m1 3 2/m

Strunz Class:

II/D.28-45 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.28 - Melonite group, Berntdtite - Moncheite series

II/D.28-10 Berndtite SnS2 P 3m1 3 2/m

II/D.28-20 Kitkaite NiTeSe P 3m1 3 2/m

II/D.28-30 Melonite NiTe2 P 3m1 3 2/m

II/D.28-35 Sudovikovite! PtSe2 P 3m1 3 2/m

II/D.28-40 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m

II/D.28-45 Shuangfengite IrTe2 P 3m1 3 2/m

II/D.28-50 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m

II/D.28-60 Verbeekite! PdSe2 C 2, Cm, or C 2/m Mono

Other Shuangfengite Information

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 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - WWW-MINCRYST

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Print or Cut-and-Paste your Shuangfengite Specimen Label here :

Shuangfengite

IrTe2
Dana No: 2.12.14.6 Strunz No: II/D.28-45
Locality:

Notes: