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Ellisite Mineral Data
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General Ellisite Information
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 Chemical Formula: |
Tl3AsS3 |
| Composition: |
Molecular Weight = 784.27 gm |
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Thallium 78.18 % Tl |
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Arsenic 9.55 % As |
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Sulfur 12.27 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Tl3AsS3 |
| Environment: |
In a hydrothermal gold deposit, in mineralized, argillaceous, carbonaceous dolomite beds. |
| IMA Status: |
Approved IMA 1979 |
| Locality: |
Carlin gold deposit, Eureka County, Nevada, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Albert J. Ellis (1929-), New Zealand geochemist. |
| Name Pronunciation: |
Ellisite  |
| Synonym: |
ICSD 100292 |
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PDF 35-723 |
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Ellisite Image |
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Images:
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Ellisite
Comments: SEM image of ellisite grains showing rhombohedral cleavage fragments. (AmMin, v64,701).
Location: Mineralized laminated carbonaceous dolomite beds in the Carlin gold deposit, Eureka County, Nevada, USA.
Scale: See Image.
© American Mineralogist |
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Ellisite Crystallography
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| Axial Ratios: |
a:c = 1:0.78278 |
| Cell Dimensions: |
a = 12.324, c = 9.647, Z = 7; V = 1,268.90 Den(Calc)= 7.18 |
| Crystal System: |
Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.669(1), 3.214(0.53), 5.333(0.37), |
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Physical Properties of Ellisite
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| Cleavage: |
{1011} Perfect, {1011} Perfect, {1011} Perfect |
| Color: |
Dark gray. |
| Density: |
7.1 |
| Diaphaneity: |
Opaque |
| Fracture: |
Hackly - Jagged, torn surfaces, (e.g. fractured metals). |
| Habit: |
Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals. |
| Hardness: |
2 - Gypsum |
| Luster: |
Metallic |
| Streak: |
pale brown |
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Optical Properties of Ellisite
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| Optical Data: |
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| RL Anisotrophism: |
Blue-purple to red-purple to brownish orange. |
| RL Color: |
Light gray with a purplish tint with deep red to deep orange-red internal reflections. |
| RL Pleochroism: |
Very weak, in colors from light purplish gray to light pinkish gray. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Ellisite in Air
| λ |
R |
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∑ R(λ) |
| 470 nm |
31.70 |
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| 546 nm |
29.20 |
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| 589 nm |
28.90 |
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| 650 nm |
28.30 |
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Calculated Relative Intensity Colors of Ellisite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
310% |
| R |
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Calculated Properties of Ellisite
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| Electron Density: |
Bulk Density (Electron Density)=5.93 gm/cc
note: Specific Gravity of Ellisite =7.18 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0009199452
Boson Index = 0.9990800548 |
| Photoelectric: |
PEEllisite =1,399.96 barns/electron
U=PEEllisite x rElectron Density=8,305.21 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ellisite is Not Radioactive |
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Ellisite Classification
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| Dana Class: |
03.04.09.01 (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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(03.04.09)Dana Group |
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03.04.09.01 Ellisite Tl3AsS3 R 3m 3m |
| Strunz Class: |
02.JC.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.J - Sulfosalts of PbS Archetype |
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02.JC -Galena derivatives, with Tl |
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02.JC.05 Ellisite Tl3AsS3 R 3m 3m |
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Other Ellisite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Ellisite :
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
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Ellisite Specimen Label here :
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Ellisite
Tl3AsS3
Dana No: 03.04.09.01 Strunz No: 02.JC.05
Locality:
Notes:
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