Jentschite Mineral Data

General Jentschite Information

Chemical Formula:

TlPbAs2SbS6

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 %

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

IMA1993-025

Jentschite Image

Images:

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

Jentschite Crystallography

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.823(1), 3.587(0.86), 2.778(0.84),

Physical Properties of Jentschite

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

Calculated Properties of Jentschite

Electron Density:

Bulk Density (Electron Density)=4.60 gm/cc
note: Specific Gravity of Jentschite =5.36 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Jentschite= 884.53 barns/electron
U=PE_Jentschite x rElectron Density=4,071.95 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jentschite is Not Radioactive

Jentschite Classification

Dana Class:

03.07.10.03 (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

03.07.10.01 Simonite TlHgAs3S6 P 2₁/n 2/m

03.07.10.02 Edenharterite TlPbAs3S6 F dd2 mm2

03.07.10.03 Jentschite! TlPbAs2SbS6 P 2₁/n 2/m

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

02.H - Sulfosalts of SnS Archetype

02.HD -With Tl

02.HD.40 Jentschite! TlPbAs2SbS6 P 2₁/n 2/m

Other Jentschite Information

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 :

Jentschite

TlPbAs2SbS6
Dana No: 03.07.10.03 Strunz No: 02.HD.40
Locality:

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