Mineralogy Database

Ourayite Mineral Data

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General Ourayite Information

Help on Chemical  Formula: Chemical Formula: Pb4Ag3Bi5S13
Help on Composition: Composition: Molecular Weight = 20815.77 gm
   Silver   12.96 %  Ag
   Bismuth  41.16 %  Bi
   Lead     29.86 %  Pb
   Sulfur   16.02 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: Ag25Pb30Bi41S104
Help on Environment: Environment: In a hydrothermal sulfide vein.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Old Lout mine, Ouray, Colorado. USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Ourayite Say OURAYITE

Ourayite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3055:1:0.1861
Help on Cell Dimensions: Cell Dimensions: a = 13.457, b = 44.042, c = 8.2, Z = 1; V = 4,859.92 Den(Calc)= 7.11
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Bbmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.36(1), 2.87(0.6), 2.96(0.5),

Physical Properties of Ourayite

Help on Color: Color: Gray.
Help on Density: Density: 7.11
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Metallic

Optical Properties of Ourayite

Help on RL Anisotrophism: RL Anisotrophism: Distinct to strong, light gray to bluish black.
Help on RL Color: RL Color: Galena white.
Help on RL Pleochroism: RL Pleochroism: Weak in oil.

Calculated Properties of Ourayite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.94 gm/cc
note: Specific Gravity of Ourayite =7.11 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEOurayite =1,376.86 barns/electron
U=PEOurayite x rElectron Density=8,184.93 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ourayite is Not Radioactive

Ourayite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.05)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.05.06)Dana Group Ourayite Pb4Ag3Bi5S13 Bbmm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.JB.40c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.J - Sulfosalts of PbS Archetype
  02.JB -Galena derivatives, with Pb
02.JB.40c Ourayite Pb4Ag3Bi5S13 Bbmm 2/m 2/m 2/m

Other Ourayite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: 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 :


Dana No: Strunz No: 02.JB.40c





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