Erniggliite Mineral Data

General Erniggliite Information

Chemical Formula:

Tl2SnAs2S6

Composition:

Molecular Weight = 869.72 gm

Thallium 47.00 % Tl

Tin 13.65 % Sn

Arsenic 17.23 % As

Sulfur 22.12 % S

______

100.00 %

Empirical Formula:

Tl₂SnAs₂S₆

IMA Status:

Approved IMA 1992

Locality:

Lengenbach, Binn, Switzerland. Link to MinDat.org Location Data.

Name Origin:

Named in 1992 for Ernst Niggli (b.1917), Swiss mineralogist.

Name Pronunciation:

Erniggliite + Pronunciation

Synonym:

ICSD 72907

IMA1987-025

PDF 45-1467

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Erniggliite Crystallography

Axial Ratios:

a:c = 1:1.07245

Cell Dimensions:

a = 6.68, c = 7.164, Z = 1; V = 276.85 Den(Calc)= 5.22

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: P 3

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

By Intensity(I/I_o): 3.343(1), 3.029(0.63), 3.06(0.5),

Crystal Structure:

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Graeser S , Schwander H , Wulf R , Edenharter A , Schweizerische Mineralogische und Petrographische Mitteilungen , 72 (1992) p.293-305, Erniggliite (Tl2SnAs2S6), a new mineral from Lengenbach, Binntal (Switzerland):, description and crystal structure determination based on data from synchrotron radiation, Locality: Lengenbach, Binntal, Switzerland

Physical Properties of Erniggliite

Cleavage:

{???} Perfect

Color:

Gray, Black gray, Black.

Diaphaneity:

Opaque

Hardness:

2-3 - Gypsum-Calcite

Luster:

Metallic

Streak:

reddish black

Calculated Properties of Erniggliite

Electron Density:

Bulk Density (Electron Density)=4.49 gm/cc
note: Specific Gravity of Erniggliite =5.22 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Erniggliite= 861.76 barns/electron
U=PE_Erniggliite x rElectron Density=3,868.83 barns/cc.

Radioactivity:

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

Erniggliite Classification

Dana Class:

03.04.18.01 (03)Sulfides - Sulfosalts

(03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.04.18)Dana Group

03.04.18.01 Erniggliite Tl2SnAs2S6 P 3 3

Strunz Class:

02.GA.45 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.G - Sulfarsenites, sulfantimonites, sulfbismuthites

02.GA -Neso-sulfarsenites, etc., without additional S

02.GA.45 Erniggliite Tl2SnAs2S6 P 3 3

Other Erniggliite Information

References:

NAME( Dana8) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996)

See Also:

Links to other databases for Erniggliite :
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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Print or Cut-and-Paste your Erniggliite Specimen Label here :

Erniggliite

Tl2SnAs2S6
Dana No: 03.04.18.01 Strunz No: 02.GA.45
Locality:

Notes: