Mineralogy Database

Ellisite Mineral Data

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General Ellisite Information

Help on Chemical  Formula: Chemical Formula: Tl3AsS3
Help on Composition: Composition: Molecular Weight = 784.27 gm
   Thallium  78.18 %  Tl
   Arsenic    9.55 %  As
   Sulfur    12.27 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: Tl3AsS3
Help on Environment: Environment: In a hydrothermal gold deposit, in mineralized, argillaceous, carbonaceous dolomite beds.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Carlin gold deposit, Eureka County, Nevada, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Albert J. Ellis (1929-), New Zealand geochemist.
Help on Name Pronunciation: Name Pronunciation: Ellisite Say ELLISITE
Help on Synonym: Synonym: ICSD 100292
  PDF 35-723

Ellisite Image

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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

Ellisite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.78278
Help on Cell Dimensions: Cell Dimensions: a = 12.324, c = 9.647, Z = 7; V = 1,268.90 Den(Calc)= 7.18
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.669(1), 3.214(0.53), 5.333(0.37),

Physical Properties of Ellisite

Help on Cleavage: Cleavage: {1011} Perfect, {1011} Perfect, {1011} Perfect
Help on Color: Color: Dark gray.
Help on Density: Density: 7.1
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Hackly - Jagged, torn surfaces, (e.g. fractured metals).
Help on Habit: Habit: Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Metallic
Help on Streak: Streak: pale brown

Optical Properties of Ellisite

Help on Optical Data: Optical Data:
Help on RL Anisotrophism: RL Anisotrophism: Blue-purple to red-purple to brownish orange.
Help on RL Color: RL Color: Light gray with a purplish tint with deep red to deep orange-red internal reflections.
Help on RL Pleochroism: RL Pleochroism: Very weak, in colors from light purplish gray to light pinkish gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Ellisite in Air
λ R  ∑ R(λ) 
 470 nm   31.70   
 546 nm   29.20 
 589 nm   28.90 
 650 nm   28.30 
Calculated Relative Intensity Colors of Ellisite in Air
   0%   40%   80% 100% 120% 160% 200% 240% 280% 310%

Calculated Properties of Ellisite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.93 gm/cc
note: Specific Gravity of Ellisite =7.18 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0009199452
Boson Index = 0.9990800548
Help on Photoelectric: Photoelectric: PEEllisite =1,399.96 barns/electron
U=PEEllisite x rElectron Density=8,305.21 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ellisite is Not Radioactive

Ellisite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.04.09)Dana Group Ellisite Tl3AsS3 R 3m 3m
Help on  Strunz Class: Strunz Class: 02.JC.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.J - Sulfosalts of PbS Archetype
  02.JC -Galena derivatives, with Tl
02.JC.05 Ellisite Tl3AsS3 R 3m 3m

Other Ellisite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: 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

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Dana No: Strunz No: 02.JC.05





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