Changchengite Mineral Data


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General Changchengite Information

Help on Chemical  Formula: Chemical Formula: IrBiS
Help on Composition: Composition: Molecular Weight = 433.27 gm
   Bismuth  48.23 %  Bi
   Iridium  44.37 %  Ir
   Sulfur    7.40 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: IrBiS
Help on Environment: Environment: Pt placer deposits derived from the host chromite ore bodies in dunite.
Help on IMA Status: IMA Status: Approved IMA 1997 (Dana # Added)
Help on Locality: Locality: Along a branch of the Luanhe River in Hebei Province, about 200 km ENE of Beijing, China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after chancheng, the name of the "Great Wall" of China.
Help on Synonym: Synonym: IMA1995-047
 

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Changchengite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 6.144, Z = 4; V = 231.93 Den(Calc)= 12.41
Help on Crystal System: Crystal System: Isometric - TetartoidalH-M Symbol (2 3) Space Group: P 213
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.86(1), 2.75(0.7), 2.51(0.6),
 

Physical Properties of Changchengite

Help on Cleavage: Cleavage: None
Help on Color: Color: Gray, Black.
Help on Density: Density: 11.96 - 12.27, Average = 12.11
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: black
 

Optical Properties of Changchengite

Help on RL Color: RL Color: Bright white with a yellowish tint.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Changchengite in Air
λ R  ∑ R(λ) 
 470 nm   46.20   
 550 nm   47.20 
 590 nm   47.60 
 650 nm   47.40 
Calculated Relative Intensity Colors of Changchengite in Air
Relative
Intensity
   0%   20%   40%   60%   80% 100% 120% 140% 160% 180% 190%
R                      
 

Calculated Properties of Changchengite

Help on Electron Density: Electron Density:

relectron=10.1 gm/cc
note: rChangchengite =12.4 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00055
Boson Index = 0.99945
Help on Photoelectric: Photoelectric:

PEChangchengite =1,632.42 barns/electron
U=PEChangchengite x relectron=16458.54 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Changchengite is Not Radioactive

 

Changchengite Classification

Help on  Dana Class: Dana Class: 2.12.3.14 (2)Sulfides - Including Selenides and Tellurides
  (2.12)where Am Bn Xp, with (m+n):p=1:2
  (2.12.3)Cobaltite Group (Cubic or pseudocubic crystals)
 
2.12.3.1 Cobaltite CoAsS P ca21 mm2
 
2.12.3.2 Gersdorffite NiAsS P 213 2 3
 
2.12.3.3 Ullmannite NiSbS P 213 2 3
 
2.12.3.4 Willyamite (Co,Ni)SbS P 213 2 3
 
2.12.3.5 Tolovkite IrSbS P 213 2 3
 
2.12.3.6 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3
 
2.12.3.7 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3
 
2.12.3.8 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3
 
2.12.3.9 Jolliffeite (Ni,Co)AsSe P a3 2/m 3
 
2.12.3.10 Padmaite PdBiSe P 213 2 3
 
2.12.3.11 Michenerite (Pd,Pt)BiTe P 213 2 3
 
2.12.3.12 Maslovite PtBiTe P 213 2 3
 
2.12.3.13 Testibiopalladite PdTe(Sb,Te) P 213 2 3
 
2.12.3.14 Changchengite ! IrBiS P 213 2 3
 
2.12.3.15 Milotaite! PdSbSe P 21/3 2 3
 
2.12.3.16 IMA2004-047! PdAsSe Pa3 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: II/D.17-153 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.17 - Pyrite group and related compounds, Fukuchilite - Micherenite
 
II/D.17-10 Fukuchilite Cu3FeS8 P a3 2/m 3
 
II/D.17-20 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3
 
II/D.17-30 Pyrite FeS2 P a3 2/m 3
 
II/D.17-40 Cattierite CoS2 P a3 2/m 3
 
II/D.17-50 Vaesite NiS2 P a3 2/m 3
 
II/D.17-60 Hauerite MnS2 P a3 2/m 3
 
II/D.17-65 Dzharkenite FeSe2 P a3 2/m 3
 
II/D.17-70 Krutaite CuSe2 P a3 2/m 3
 
II/D.17-80 Trogtalite CoSe2 P a3 2/m 3
 
II/D.17-90 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3
 
II/D.17-100 Laurite RuS2 P a3 2/m 3
 
II/D.17-110 Erlichmanite OsS2 P a3 2/m 3
 
II/D.17-120 Sperrylite PtAs2 P a3 2/m 3
 
II/D.17-130 Aurostibite AuSb2 P a3 2/m 3
 
II/D.17-140 Geversite Pt(Sb,Bi)2 P a3 2/m 3
 
II/D.17-150 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3
 
II/D.17-153 Changchengite IrBiS P 213 2 3
 
II/D.17-155 Mayingite IrBiTe P a3 2/m 3
 
II/D.17-160 Maslovite PtBiTe P 213 2 3
 
II/D.17-170 Testibiopalladite PdTe(Sb,Te) P 213 2 3
 
II/D.17-175 Padmaite PdBiSe P 213 2 3
 
II/D.17-180 Michenerite (Pd,Pt)BiTe P 213 2 3
 

Other Changchengite Information

Help on References: References: NAME( AmMin) PHYS. PROP.(Eur. J. Min.,Vol.8,1996) OPTIC PROP.(MinRec, v 29, p 467)
Help on See Also: See Also: Links to other databases for Changchengite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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

Changchengite

IrBiS
Dana No: 2.12.3.14 Strunz No: II/D.17-153
Locality:

 

Notes:

 

 
   
 
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