Mineralogy Database

Jentschite Mineral Data

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General Jentschite Information

Help on Chemical  Formula: Chemical Formula: TlPbAs2SbS6
Help on Composition: Composition: Molecular Weight = 875.57 gm
   Thallium  23.34 %  Tl
   Antimony  13.91 %  Sb
   Arsenic   17.11 %  As
   Lead      23.66 %  Pb
   Sulfur    21.97 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: TlPbAs2SbS6
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: Lengenbach, Binntal, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Franz Jentsch (1868-1908), head of the Binn syndicate that worked the sulfosalt deposit at the Lengenbach quarry.
Help on Name Pronunciation: Name Pronunciation: Jentschite + Pronunciation Say JENTSCHITE
Help on Synonym: Synonym: ICSD 83272

Jentschite Image

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Comments: Black and dark red translucent needles of jentschite on white dolomite.
Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Picture width 1 cm.
© Walter Gabriel

Jentschite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3388:1:0.2439
Help on Cell Dimensions: Cell Dimensions: a = 8.121, b = 23.969, c = 5.847, Z = 4; beta = 107.68° V = 1,084.37 Den(Calc)= 5.36
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): 2.823(1), 3.587(0.86), 2.778(0.84),

Physical Properties of Jentschite

Help on Cleavage: Cleavage: {101} Perfect
Help on Color: Color: Black, Dark red.
Help on Density: Density: 5.24
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: dark red

Calculated Properties of Jentschite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.60 gm/cc
note: Specific Gravity of Jentschite =5.36 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEJentschite = 884.53 barns/electron
U=PEJentschite x rElectron Density=4,071.95 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jentschite is Not Radioactive

Jentschite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.07.10)Simonite Group Simonite TlHgAs3S6 P 21/n 2/m Edenharterite TlPbAs3S6 F dd2 mm2 Jentschite! TlPbAs2SbS6 P 21/n 2/m Sicherite! TlAg2(As,Sb)3S6 Pmnb 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.HD.40 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HD -With Tl
02.HD.40 Jentschite! TlPbAs2SbS6 P 21/n 2/m

Other Jentschite Information

Help on References: References: NAME( CanMin, 8/99) PHYS. PROP.(Min.Mag.,Vol.61,p131-137,1997)
Help on See Also: See Also: Links to other databases for Jentschite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 02.HD.40





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