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 - PrismaticH-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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Berlepsch P , Schweizerische Mineralogische und Petrographische Mitteilungen , 76 (1996) p.147-157, Crystal structure and crystal chemistry of the homeotypes edenharterite, (TlPbAs3S6) and jentschite (TlPbAs2SbS6) from Lengenbach, Binntal (Switzerland), Locality: Lengenbach quarry, Binntal, Valais, Switzerland

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

Search for Jentschite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Jentschite :

A Bijoux Google Search for Jentschite
Adam's Minerals Google Search for Jentschite
Cape Minerals Google Search for Jentschite
Dakota Matrix Minerals Google Search for Jentschite
Excalibur Mineral Corp. Google Search for Jentschite
Exceptional Minerals Google Search for Jentschite
John Betts Fine Minerals Search for Jentschite
McDougall Minerals Google Search for Jentschite
Mineral News Website Link
Rock and Mineral Shows Google Search for Jentschite
Weinrich Minerals, Inc. Google Search for Jentschite

Ask about Jentschite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Jentschite Specimen Label here :

Jentschite

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

Notes: