Mineralogy Database

Imhofite Mineral Data

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General Imhofite Information

Help on Chemical  Formula: Chemical Formula: Tl6CuAs16S40
Help on Composition: Composition: Molecular Weight = 3,771.23 gm
   Thallium  32.52 %  Tl
   Copper     1.69 %  Cu
   Arsenic   31.79 %  As
   Sulfur    34.01 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: Tl6CuAs16S40
Help on Environment: Environment: Of hydrothermal origin.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: From the Kengenbach quarry, Binntal, Valais, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Jospeh Imhof (1902-1969).
Help on Name Pronunciation: Name Pronunciation: Imhofite Say IMHOFITE
Help on Synonym: Synonym: ICSD 38362
  PDF 25-936

Imhofite Image

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Comments: Dark red crystals and aggregates of imhofite in matrix.
Location: Lengenbach quarry, Binntal, Wallis (Valais), Switzerland. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

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Comments: Spherical, spikey-radial brownish black aggregate of imhofite with blocky gray sulfosalt on white dolomite.
Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Picture width 3 mm.
© Walter Gabriel

Imhofite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3584:1:0.2349
Help on Cell Dimensions: Cell Dimensions: a = 8.755, b = 24.425, c = 5.739, Z = 1; beta = 108.28° V = 1,165.30 Den(Calc)= 5.37
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.675(1), 2.883(0.9), 3.96(0.7),

Physical Properties of Imhofite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Copper red.
Help on Density: Density: 4.39
Help on Diaphaneity: Diaphaneity: Translucent
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Metallic
Help on Streak: Streak: purple

Optical Properties of Imhofite

Help on RL Anisotrophism: RL Anisotrophism: Very strong.
Help on RL Color: RL Color: White, inclining to cream colored compared to galena, with strong bright red internal reflections.

Calculated Properties of Imhofite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.79 gm/cc
note: Specific Gravity of Imhofite =5.37 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0025508379
Boson Index = 0.9974491621
Help on Photoelectric: Photoelectric: PEImhofite = 561.66 barns/electron
U=PEImhofite x rElectron Density=2,692.02 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Imhofite is Not Radioactive

Imhofite 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
  (03.05.11)Dana Group Imhofite Tl6CuAs16S40 P 21/n 2/m Gabrielite! Tl2AgCu2As3S7 P1 1
Help on  Strunz Class: Strunz Class: 02.HD.30 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HD -With Tl
02.HD.30 Imhofite Tl6CuAs16S40 P 21/n 2/m

Other Imhofite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Imhofite :
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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Dana No: Strunz No: 02.HD.30





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