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Erniggliite Mineral Data
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General Erniggliite Information
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 Chemical Formula: |
Tl2SnAs2S6 |
| Composition: |
Molecular Weight = 869.72 gm |
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Thallium 47.00 % Tl |
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Tin 13.65 % Sn |
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Arsenic 17.23 % As |
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Sulfur 22.12 % S |
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______ |
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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 |
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IMA1987-025 |
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PDF 45-1467 |
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Erniggliite Crystallography
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| 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 - Rhombohedral H-M Symbol ( 3) Space Group: P 3 |
| X Ray Diffraction: |
By Intensity(I/Io): 3.343(1), 3.029(0.63), 3.06(0.5), |
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Physical Properties of Erniggliite
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| Cleavage: |
{???} Perfect |
| Color: |
Gray, Black gray, Black. |
| Diaphaneity: |
Opaque |
| Hardness: |
2-3 - Gypsum-Calcite |
| Luster: |
Metallic |
| Streak: |
reddish black |
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Calculated Properties of Erniggliite
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| Electron Density: |
Bulk Density (Electron Density)=4.49 gm/cc
note: Specific Gravity of Erniggliite =5.22 gm/cc.
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| Fermion Index: |
Fermion Index = 0.02
Boson Index = 0.98 |
| Photoelectric: |
PEErniggliite = 861.76 barns/electron
U=PEErniggliite x rElectron Density=3,868.83 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Erniggliite is Not Radioactive |
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Erniggliite Classification
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| Dana Class: |
03.04.18.01 (03)Sulfides - Sulfosalts |
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(03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.04.18)Dana Group |
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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 |
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02.G - Sulfarsenites, sulfantimonites, sulfbismuthites |
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02.GA -Neso-sulfarsenites, etc., without additional S |
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02.GA.45 Erniggliite Tl2SnAs2S6 P 3 3 |
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Other Erniggliite Information
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| 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 :
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Erniggliite
Tl2SnAs2S6
Dana No: 03.04.18.01 Strunz No: 02.GA.45
Locality:
Notes:
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