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Crerarite Mineral Data
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General Crerarite Information
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 Chemical Formula: |
(Pt,Pb)Bi3(S,Se)4-x (x~0.7) |
| Composition: |
Molecular Weight = 959.01 gm |
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Bismuth 65.37 % Bi |
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Platinum 15.26 % Pt |
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Lead 5.40 % Pb |
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Selenium 4.94 % Se |
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Sulfur 9.03 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Pt0.75Pb0.25Bi3S2.7Se0.6 |
| Environment: |
In amphibolite associated with Cu-Ni-PGE deposit. |
| IMA Status: |
Approved IMA 1994 |
| Locality: |
Lake Sheen, Belleterre, Guillet township, Abitibi-Temiscaminque region, Quebec, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Prof. David Crerar (1945-1994) of Princeton University. |
| Synonym: |
IMA1994-003 |
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Crerarite Crystallography
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| Cell Dimensions: |
a = 5.86, Z = 1; V = 201.23 Den(Calc)= 7.91 |
| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m |
| 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), |
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Physical Properties of Crerarite
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| Cleavage: |
{100} Perfect |
| Color: |
Black. |
| 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 |
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Optical Properties of Crerarite
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| RL Anisotrophism: |
None. |
| RL Bireflectance: |
None. |
| RL Color: |
White-gray. |
| RL Pleochroism: |
None. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Crerarite in Air
| λ |
R |
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∑ R(λ) |
| 460 nm |
52.70 |
 |
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| 540 nm |
50.30 |
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| 580 nm |
49.80 |
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| 660 nm |
48.90 |
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Calculated Relative Intensity Colors of Crerarite in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
160% |
180% |
| R |
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Calculated Properties of Crerarite
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| Electron Density: |
Bulk Density (Electron Density)=6.46 gm/cc
note: Specific Gravity of Crerarite =7.91 gm/cc.
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| Fermion Index: |
Fermion Index = 0.06
Boson Index = 0.94 |
| Photoelectric: |
PECrerarite =1,636.54 barns/electron
U=PECrerarite x rElectron Density=10571.95 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Crerarite is Not Radioactive |
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Crerarite Classification
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| Dana Class: |
02.08.01.08 (02)Sulfides - Including Selenides and Tellurides |
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(02.08)where Am Bn Xp, with (m+n):p=1:1 |
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(02.08.01)Galena Group (Isometric: Fm3m) |
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02.08.01.01 Galena PbS F m3m 4/m 3 2/m |
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02.08.01.02 Clausthalite PbSe F m3m 4/m 3 2/m |
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02.08.01.03 Altaite PbTe F m3m 4/m 3 2/m |
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02.08.01.04 Alabandite MnS F m3m 4/m 3 2/m |
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02.08.01.05 Oldhamite (Ca,Mg,Fe)S F m3m 4/m 3 2/m |
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02.08.01.06 Niningerite (Mg,Fe,Mn)S F m3m 4/m 3 2/m |
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02.08.01.07 Borovskite Pd3SbTe4 F m3m 4/m 3 2/m |
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02.08.01.08 Crerarite (Pt,Pb)Bi3(S,Se)4-x(x~0.7) F m3m 4/m 3 2/m |
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02.08.01.09 Keilite! (Fe,Mn,Mg,Ca,Cr)S F m3m 4/m 3 2/m |
| Strunz Class: |
02.LB.45 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.L - Unclassified Sulfosalts |
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02.LB -With essential Pb |
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02.LB.45 Crerarite (Pt,Pb)Bi3(S,Se)4-x(x~0.7) F m3m 4/m 3 2/m |
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Other Crerarite Information
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| References: |
NAME( MinRec, v 27, p 116) PHYS. PROP.(MinRec, v 27, p 116) OPTIC PROP.(MinRec, v 27, p 116) |
| 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 :
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Crerarite
(Pt,Pb)Bi3(S,Se)4-x (x~0.7)
Dana No: 02.08.01.08 Strunz No: 02.LB.45
Locality:
Notes:
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