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Ellisite

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Formula:
Tl3AsS3
Colour:
Dark gray
Lustre:
Metallic
Hardness:
2
Specific Gravity:
7.10
Crystal System:
Trigonal
Name:
Named by Frank W. Dickson, Arthur S. Radtke, and Jocelyn A. Peterson in honor of Dr. Albert James Ellis (27 December 1929, Dunedin, Otago, New Zealand - ), geochemist, Chemistry Division, Department of Scientific and Industrial Research, New Zealand, for his contributions to the field of hydrothermal geochemistry.
This page provides mineralogical data about Ellisite.


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Classification of EllisiteHide

Approved
First Published:
1979
2.JC.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
C : Galena derivatives, with Tl
3.4.9.1

3 : SULFOSALTS
4 : ø = 3
5.5.2

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
5 : Sulpharsenites etc. of Tl

Physical Properties of EllisiteHide

Metallic
Transparency:
Opaque
Colour:
Dark gray
Streak:
Light brown with a tinge of orange
Hardness:
Hardness:
VHN50=36 - 44 kg/mm2 - Vickers
Cleavage:
Distinct/Good
Good rhombohedral
Fracture:
Hackly
Density:
7.10(5) g/cm3 (Measured)    7.18 g/cm3 (Calculated)
Comment:
Measured on synthetic material

Optical Data of EllisiteHide

Type:
Anisotropic
Anisotropism:
From blue-purple to red-purple to brownish orange
Reflectivity:
470nmR=31.7%
546nmR=29.2%
589nmR=28.9%
650nmR=28.3%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 31.7%.
Colour in reflected light:
Light gray with purplish tint
Internal Reflections:
Deep red to deep orange-red
Pleochroism:
Weak
Comments:
Light purplish gray to light pinkish gray

Chemical Properties of EllisiteHide

Formula:
Tl3AsS3

Crystallography of EllisiteHide

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
Cell Parameters:
a = 12.324 Å, c = 9.647 Å
Ratio:
a:c = 1 : 0.783
Unit Cell V:
1,268.90 ų (Calculated from Unit Cell)
Z:
7
Morphology:
Anhedral grains
Comment:
Synthetic

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.333 (37)
3.559 (20)
3.214 (53)
2.757 (10)
2.669 (100)
2.327 (28)
1.780 (15)
(

Type Occurrence of EllisiteHide

General Appearance of Type Material:
Dispersed grains and small discontinuous patches.
Place of Conservation of Type Material:
Epithermal Minerals Collection, Department of Geology, Stanford University, California.
Geological Setting of Type Material:
Carlin type gold deposit
Reference:
Dickson, F.W., Radtke, A.S., Peterson, J.A. (1979) Ellisite, Tl3AsS3, a new mineral from the Carlin gold deposit, Nevada, and associated sulfide and sulfosalt minerals. American Mineralogist: 64: 701-707.

Synonyms of EllisiteHide

Other Language Names for EllisiteHide

German:Ellisit
Simplified Chinese:硫砷铊矿
Spanish:Ellisita

Common AssociatesHide

Related Minerals - Nickel-Strunz GroupingHide

2.JC.10GillulyiteTl2As7.5Sb0.3S13Mon.
2.JC.25eGalenobismutitePbBi2S4Orth. mmm (2/m 2/m 2/m)
2.JC.40aNakaseiteCuAg3Pb4Sb12S24

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

5.5.1LoránditeTlAsS2Mon. 2/m : P21/b
5.5.3ImhofiteTl5.8As15.4S26Mon. 2/m
5.5.4SimoniteTlHgAs3S6Mon. 2/m
5.5.6ChristiteTlHgAsS3Mon. 2/m
5.5.6RouthieriteTl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6Tet. 4 2m : I4 2m
5.5.7HutchinsoniteTlPbAs5S9Orth.
5.5.8Wallisite(Cu,Ag)TlPbAs2S5Tric.
5.5.9BernarditeTlAs5S8Mon. 2/m : P21/b
5.5.10VrbaiteHg3Tl4As8Sb2S20Orth. mmm (2/m 2/m 2/m) : Cmca
5.5.11RebuliteTl5Sb5As8S22Mon. 2/m : P21/b
5.5.12GillulyiteTl2As7.5Sb0.3S13Mon.
5.5.13WeissbergiteTlSbS2Tric. 1 : P1
5.5.14Rohaite(Tl,Pb,K)2Cu8.7Sb2S4Orth.
5.5.15VaughaniteTlHgSb4S7Tric.
5.5.16ChalcothalliteTl2(Cu,Fe)6SbS4Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
5.5.17PierrotiteTl2(Sb,As)10S16Orth. mm2 : Pna21
5.5.18ParapierrotiteTlSb5S8Mon. m
5.5.19CriddleiteTlAg2Au3Sb10S10Mon.
5.5.20ChabournéiteTl4Pb2(Sb,As)20S34Tric. 1 : P1

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for EllisiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Dickson, F.W., Radtke, A.S., Peterson, J.A. (1979) Ellisite, Tl3AsS3, a new mineral from the Carlin gold deposit, Nevada, and associated sulfide and sulfosalt minerals. American Mineralogist: 64: 701-707.
Gostojić, M. (1980) Die Kristallstruktur von synthetischem Ellisit, Tl3AsS3. Zeitschrift für Kristallographie: 151: 249-254.

Internet Links for EllisiteHide

Localities for EllisiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
China
 
  • Yunnan Province
    • Chuxiong Autonomous Prefecture
      • Nanhua Co.
Minzhi Yang (2000): Bulletin of Mineralogy, Petrology and Geochemistry 19(4), 381-383; Zhang Zhong, Zhang Baogui, Hu Jing, Yao Linbo, and Tian Yifu (2007): Science in China, Series D (Earth Sciences), 50(3), 359-370
USA (TL)
 
  • Nevada
    • Eureka Co.
      • Lynn District
        • Elko
Am Min 64 (1979), 701; Min.Rec.:20:469.
Mineral and/or Locality  
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