Crerarite Mineral Data


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General Crerarite Information
Help on Chemical Formula: Chemical Formula: (Pt,Pb)Bi3(S,Se)4-x (x~0.7)
Help on Composition: Composition: Molecular Weight = 959.01 gm
   Bismuth   65.37 %  Bi
   Platinum  15.26 %  Pt
   Lead       5.40 %  Pb
   Selenium   4.94 %  Se
   Sulfur     9.03 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pt0.75Pb0.25Bi3S2.7Se0.6
Help on Environment: Environment: In amphibolite associated with Cu-Ni-PGE deposit.
Help on IMA Status: IMA Status: Approved IMA 1994
Help on Locality: Locality: Lake Sheen, Belleterre, Guillet township, Abitibi-Témiscaminque region, Québec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Prof. David Crerar (1945-1994) of Princeton University.
Help on Synonym: Synonym: IMA1994-003
 

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Crerarite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 5.86, Z = 1; V = 201.23 Den(Calc)= 7.91
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.94(1), 3.37(0.5), 1.472(0.5),2.07(0.3), 1.687(0.15), 1.766(0.15), 1.197(0.1), 1.347(0.1), 1.311(0.08),
 

Physical Properties of Crerarite

Help on Cleavage: Cleavage: [100] Perfect
Help on Color: Color: Black.
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 - Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Crerarite

Help on RL Anisotrophism: RL Anisotrophism: None.
Help on RL Bireflectance: RL Bireflectance: None.
Help on RL Color: RL Color: White-gray.
Help on RL Pleochroism: RL Pleochroism: None.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Crerarite in Air
λ R  ∑ R(λ) 
 460 nm   52.70   
 540 nm   50.30 
 580 nm   49.80 
 660 nm   48.90 
Calculated Relative Intensity Colors of Crerarite in Air
Relative
Intensity		    0%   20%   40%   60%   80% 100% 120% 140% 160% 180%
R                    
 

Calculated Properties of Crerarite

Help on Electron Density: Electron Density:

relectron=6.46 gm/cc
note: rCrerarite =7.91 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.06793
Boson Index = 0.93207
Help on Photoelectric: Photoelectric:

PECrerarite =1,636.54 barns/electron
U=PECrerarite x relectron=10571.95 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Crerarite is Not Radioactive
 

Crerarite Classification
Help on Dana Class: Dana Class: 2.8.1.8 (2)Sulfides - Including Selenides and Tellurides
  (2.8)where Am Bn Xp, with (m+n):p=1:1
  (2.8.1)Galena Group (Isometric: Fm3m)
 
2.8.1.1 Galena PbS F m3m 4/m 3 2/m
 
2.8.1.2 Clausthalite PbSe F m3m 4/m 3 2/m
 
2.8.1.3 Altaite PbTe F m3m 4/m 3 2/m
 
2.8.1.4 Alabandite MnS F m3m 4/m 3 2/m
 
2.8.1.5 Oldhamite (Ca,Mg,Fe)S F m3m 4/m 3 2/m
 
2.8.1.6 Niningerite (Mg,Fe,Mn)S F m3m 4/m 3 2/m
 
2.8.1.7 Borovskite Pd3SbTe4 F m3m 4/m 3 2/m
 
2.8.1.8 Crerarite (Pt,Pb)Bi3(S,Se)4-x(x~0.7) F m3m 4/m 3 2/m
 
2.8.1.9 Keilite! (Fe,Mg)S F m3m 4/m 3 2/m
Help on Strunz Class: Strunz Class: II/C.15-70 II - Sulfides and sulphosalts
  II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1
  II/C.15 - Galenite group
 
II/C.15-05 Keilite! (Fe,Mg)S F m3m 4/m 3 2/m
 
II/C.15-10 Niningerite (Mg,Fe,Mn)S F m3m 4/m 3 2/m
 
II/C.15-20 Oldhamite (Ca,Mg,Fe)S F m3m 4/m 3 2/m
 
II/C.15-30 Alabandite MnS F m3m 4/m 3 2/m
 
II/C.15-40 Galena PbS F m3m 4/m 3 2/m
 
II/C.15-50 Clausthalite PbSe F m3m 4/m 3 2/m
 
II/C.15-60 Altaite PbTe F m3m 4/m 3 2/m
 
II/C.15-70 Crerarite (Pt,Pb)Bi3(S,Se)4-x(x~0.7) F m3m 4/m 3 2/m
 

Other Crerarite Information
Help on References: References: NAME( MinRec, v 27, p 116) PHYS. PROP.(MinRec, v 27, p 116) OPTIC PROP.(MinRec, v 27, p 116)
Help on See Also: See Also: Links to other databases for Crerarite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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Crerarite

(Pt,Pb)Bi3(S,Se)4-x (x~0.7)
Dana No: 2.8.1.8 Strunz No: II/C.15-70
Locality:

 

Notes:

 
 
   
 
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