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Ourayite Mineral Data
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General Ourayite Information
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 Chemical Formula: |
Pb4Ag3Bi5S13 |
| Composition: |
Molecular Weight = 20815.77 gm |
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Silver 12.96 % Ag |
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Bismuth 41.16 % Bi |
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Lead 29.86 % Pb |
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Sulfur 16.02 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Ag25Pb30Bi41S104 |
| Environment: |
In a hydrothermal sulfide vein. |
| IMA Status: |
Approved IMA 1977 |
| Locality: |
Old Lout mine, Ouray, Colorado. USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Ourayite  |
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Ourayite Crystallography
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| Axial Ratios: |
a:b:c =0.3055:1:0.1861 |
| Cell Dimensions: |
a = 13.457, b = 44.042, c = 8.2, Z = 1; V = 4,859.92 Den(Calc)= 7.11 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Bbmm |
| X Ray Diffraction: |
By Intensity(I/Io): 3.36(1), 2.87(0.6), 2.96(0.5), |
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Physical Properties of Ourayite
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| Color: |
Gray. |
| Density: |
7.11 |
| Diaphaneity: |
Opaque |
| Habit: |
Bladed - Aggregates of thin lath-like crystals (e.g. kyanite). |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
2 - Gypsum |
| Luster: |
Metallic |
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Optical Properties of Ourayite
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| RL Anisotrophism: |
Distinct to strong, light gray to bluish black. |
| RL Color: |
Galena white. |
| RL Pleochroism: |
Weak in oil. |
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Calculated Properties of Ourayite
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| Electron Density: |
Bulk Density (Electron Density)=5.94 gm/cc
note: Specific Gravity of Ourayite =7.11 gm/cc.
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| Fermion Index: |
Fermion Index = 0.06
Boson Index = 0.94 |
| Photoelectric: |
PEOurayite =1,376.86 barns/electron
U=PEOurayite x rElectron Density=8,184.93 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ourayite is Not Radioactive |
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Ourayite Classification
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| Dana Class: |
03.05.06.01 (03)Sulfides - Sulfosalts |
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(03.05)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.05.06)Dana Group |
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03.05.06.01 Ourayite Pb4Ag3Bi5S13 Bbmm 2/m 2/m 2/m |
| Strunz Class: |
02.JB.40c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.J - Sulfosalts of PbS Archetype |
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02.JB -Galena derivatives, with Pb |
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02.JB.40c Ourayite Pb4Ag3Bi5S13 Bbmm 2/m 2/m 2/m |
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Other Ourayite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Ourayite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Print or Cut-and-Paste your Ourayite Specimen Label here :
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Ourayite
Pb4Ag3Bi5S13
Dana No: 03.05.06.01 Strunz No: 02.JB.40c
Locality:
Notes:
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