Mineralogy Database

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-Temiscaminque region, Quebec, 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

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 - Hexoctahedral H-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 Diaphaneity: Diaphaneity: 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
   0%   20%   40%   60%   80% 100% 120% 140% 160% 180%

Calculated Properties of Crerarite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.46 gm/cc
note: Specific Gravity of Crerarite =7.91 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PECrerarite =1,636.54 barns/electron
U=PECrerarite x rElectron Density=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: (02)Sulfides - Including Selenides and Tellurides
  (02.08)where Am Bn Xp, with (m+n):p=1:1
  (02.08.01)Galena Group (Isometric: Fm3m) Galena PbS F m3m 4/m 3 2/m Clausthalite PbSe F m3m 4/m 3 2/m Altaite PbTe F m3m 4/m 3 2/m Alabandite MnS F m3m 4/m 3 2/m Oldhamite (Ca,Mg,Fe)S F m3m 4/m 3 2/m Niningerite (Mg,Fe,Mn)S F m3m 4/m 3 2/m Borovskite Pd3SbTe4 F m3m 4/m 3 2/m Crerarite (Pt,Pb)Bi3(S,Se)4-x(x~0.7) F m3m 4/m 3 2/m Keilite! (Fe,Mn,Mg,Ca,Cr)S F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 02.LB.45 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.L - Unclassified Sulfosalts
  02.LB -With essential Pb
02.LB.45 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 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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


(Pt,Pb)Bi3(S,Se)4-x (x~0.7)
Dana No: Strunz No: 02.LB.45





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