Ourayite Mineral Data + 
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- 3.5.6.1 Ourayite Pb4Ag3Bi5S13 Bbmm 2/m 2/m 2/m
- II/E.31-10 Xilingolite Pb3Bi2S6 C 2/m 2/m
- II/E.31-20 Lillianite Pb3Bi2S6 Bbmm 2/m 2/m 2/m
- II/E.31-30 Bursaite Pb5Bi4S11 Bbmm 2/m 2/m 2/m
- II/E.31-40 Ourayite Pb4Ag3Bi5S13 Bbmm 2/m 2/m 2/m
- II/E.31-50 Eskimoite Ag7Pb10Bi15S36 Am m
- II/E.31-60 Vikingite Ag5Pb8Bi13S30 C 2/m 2/m
- II/E.31-70 Schirmerite Ag3Pb3Bi9S18toAg3Pb6Bi7S18 Bbmm 2/m 2/m 2/m
- II/E.31-80 Treasurite Ag7Pb6Bi15S32 B2/m 2/m
- II/E.31-90 Gustavite PbAgBi3S6(?) Bbmm 2/m 2/m 2/m
General Ourayite Information |
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 Chemical Formula: |
Pb4Ag3Bi5S13 | ||
| Composition: |
Molecular Weight = 20815.77 gm | ||
| Silver 12.96 % Ag | |||
| Bismuth 41.16 % Bi | |||
| Lead 29.86 % Pb | |||
| Sulfur 16.02 % S | |||
| ______ | |||
| 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. | ||
Search for Ourayite Images | |||
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Images:
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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 - DipyramidalH-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), | ||
Physical Properties of Ourayite |
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| Color: |
Gray. | ||
| Density: |
7.11 | ||
| Diaphaniety: |
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 | ||
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. | ||
Calculated Properties of Ourayite |
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| Electron Density: |
relectron=5.94 gm/cc |
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| Fermion Index |
Fermion Index = 0.06719 Boson Index = 0.93281 |
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| Photoelectric: |
PEOurayite =1,376.86 barns/electron |
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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: |
3.5.6.1 (3)Sulfides - Sulfosalts | ||
| (3.5)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals | |||
| (3.5.6)Dana Group | |||
| Strunz Class: |
II/E.31-40 II - Sulfides and sulphosalts | ||
| II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts (Pb-Cu/Ag) with predominant Vismut x = 6.0 - 1.6 | |||
| II/E.31 - Xilingolite - Gustavite series | |||
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 -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 12 -École des Mines de Paris Search for Ourayite using: Visit our Advertisers for Ourayite : Translate Ourayite Mineral Data : Ask about Ourayite here : Print or Cut-and-Paste your Ourayite Specimen Label here :
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