Mineralogy Database

Museumite Mineral Data

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General Museumite Information

Help on Chemical  Formula: Chemical Formula: Pb2(Pb,Sb)2S8[Te,Au]2
Help on Composition: Composition: Molecular Weight = 1,992.56 gm
   Antimony    6.17 %  Sb
   Tellurium  11.72 %  Te
   Lead       51.99 %  Pb
   Gold       10.68 %  Au
   Sulfur     19.44 %  S
             100.00 % 
Help on Empirical Formula: Empirical Formula: Pb5Au1.08Sb1.01Te1.83S12.08
Help on Environment: Environment: Occurs as anhedral to subhedral grains up to 300 �m in cavities and vugs of large nagy�gite crystals. Nagy�gite-buckhornite homologous series
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Museum specimen from gold-telluride deposit of Sacar�mb, Metaliferi Mountains, western Romania. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in appreciation for all the museums of the world that provide the important function of mineral specimen custodianship.
Help on Synonym: Synonym: IMA2003-039

Museumite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6589:1:3.1517
Help on Cell Dimensions: Cell Dimensions: a = 4.361, b = 6.618, c = 20.858, Z = 2; beta = 92.71° V = 601.31 Den(Calc)= 11.00
Help on Crystal System: Crystal System: Monoclinic Space Group: P 21 or P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.56(1), 3.47(0.58), 4.8(0.52),2.99(0.5), 2.56(0.41), 3.31(0.4), 4.1(0.4), 6.93(0.38), 2.98(0.3),

Physical Properties of Museumite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Dark silver gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Hackly - Jagged, torn surfaces, (e.g. fractured metals).
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Metallic
Help on Streak: Streak: gray black

Optical Properties of Museumite

Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Bireflectance: RL Bireflectance: Very low.
Help on RL Color: RL Color: Gray.
Help on RL Pleochroism: RL Pleochroism: Very low.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Museumite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   38.40   40.30 
 546 nm   38.10   39.40 
 589 nm   37.50   39.40 
 650 nm   35.90   38.00 
Calculated Relative Intensity Colors of Museumite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240%

Calculated Properties of Museumite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=9.22 gm/cc
note: Specific Gravity of Museumite =11.0 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.12
Boson Index = 0.88
Help on Photoelectric: Photoelectric: PEMuseumite =1,190.97 barns/electron
U=PEMuseumite x rElectron Density=10983.48 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Museumite is Not Radioactive

Museumite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.11)where Am Bn Xp, with (m+n):p=2:3
  (02.11.14)Dana Group Museumite! Pb2(Pb,Sb)2S8[Te,Au]2 P 21 or P 21/m Mono
Help on  Strunz Class: Strunz Class: 02.HB.20c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HB -With Cu, Ag, Hg, Fe, Sn and Pb
02.HB.20c Museumite! Pb2(Pb,Sb)2S8[Te,Au]2 P 21 or P 21/m Mono

Other Museumite Information

Help on References: References: NAME( EurJMin, v16:835) PHYS. PROP.(EurJMin, v16:835) OPTIC PROP.(EurJMin, v16:835)
Help on See Also: See Also: Links to other databases for Museumite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 02.HB.20c





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