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Jentschite Mineral Data
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General Jentschite Information
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 Chemical Formula: |
TlPbAs2SbS6 |
| Composition: |
Molecular Weight = 875.57 gm |
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Thallium 23.34 % Tl |
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Antimony 13.91 % Sb |
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Arsenic 17.11 % As |
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Lead 23.66 % Pb |
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Sulfur 21.97 % S |
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______ |
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100.00 % |
| Empirical Formula: |
TlPbAs2SbS6 |
| IMA Status: |
Approved IMA 1996 (Dana # Added) |
| Locality: |
Lengenbach, Binntal, Switzerland. Link to MinDat.org Location Data. |
| Name Origin: |
Named after Franz Jentsch (1868-1908), head of the Binn syndicate that worked the sulfosalt deposit at the Lengenbach quarry. |
| Name Pronunciation: |
Jentschite + Pronunciation  |
| Synonym: |
ICSD 83272 |
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IMA1993-025 |
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Jentschite Image |
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Images:
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Jentschite
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 |
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Jentschite Crystallography
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| Axial Ratios: |
a:b:c =0.3388:1:0.2439 |
| Cell Dimensions: |
a = 8.121, b = 23.969, c = 5.847, Z = 4; beta = 107.68° V = 1,084.37 Den(Calc)= 5.36 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n |
| X Ray Diffraction: |
By Intensity(I/Io): 2.823(1), 3.587(0.86), 2.778(0.84), |
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Physical Properties of Jentschite
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| Cleavage: |
{101} Perfect |
| Color: |
Black, Dark red. |
| Density: |
5.24 |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
| Hardness: |
2-2.5 - Gypsum-Finger Nail |
| Luster: |
Sub Metallic |
| Streak: |
dark red |
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Calculated Properties of Jentschite
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| Electron Density: |
Bulk Density (Electron Density)=4.60 gm/cc
note: Specific Gravity of Jentschite =5.36 gm/cc.
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| Fermion Index: |
Fermion Index = 0.05
Boson Index = 0.95 |
| Photoelectric: |
PEJentschite = 884.53 barns/electron
U=PEJentschite x rElectron Density=4,071.95 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jentschite is Not Radioactive |
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Jentschite Classification
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| Dana Class: |
03.07.10.03 (03)Sulfides - Sulfosalts |
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(03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.07.10)Simonite Group |
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03.07.10.01 Simonite TlHgAs3S6 P 21/n 2/m |
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03.07.10.02 Edenharterite TlPbAs3S6 F dd2 mm2 |
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03.07.10.03 Jentschite! TlPbAs2SbS6 P 21/n 2/m |
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03.07.10.04 Sicherite! TlAg2(As,Sb)3S6 Pmnb 2/m 2/m 2/m |
| Strunz Class: |
02.HD.40 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.H - Sulfosalts of SnS Archetype |
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02.HD -With Tl |
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02.HD.40 Jentschite! TlPbAs2SbS6 P 21/n 2/m |
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Other Jentschite Information
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| References: |
NAME( CanMin, 8/99) PHYS. PROP.(Min.Mag.,Vol.61,p131-137,1997) |
| 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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Print or Cut-and-Paste your Jentschite Specimen Label here :
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Jentschite
TlPbAs2SbS6
Dana No: 03.07.10.03 Strunz No: 02.HD.40
Locality:
Notes:
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