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Weissbergite

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Thallium Prospect (Lookout Pass), Little Valley, Tooele Co., Utah, USA
© Dan & Diana Weinrich Minerals

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Formula:
TlSbS
 
2
System:TriclinicColour:Steel-gray
Hardness:1½
Name:Named after Byron G. Weissberg (b. 1930), geologist and mineralogist, Department of Scientific and Industrial Research (New Zealand).
This page provides mineralogical data about Weissbergite.

Classification of Weissbergite

IMA status:Approved 1975
Strunz 8th edition ID:2/E.13-60
Nickel-Strunz 10th (pending) edition ID:2.HD.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
D : With Tl
Dana 8th edition ID:3.7.7.1

3 : SULFOSALTS
7 : ø = 2
Hey's CIM Ref.:5.5.13

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

Type Locality:Carlin Gold mine, Elko, Lynn District, Eureka Co., Nevada, USA
Year of Discovery:1975
Geological Setting of type material:Hydrothermal deposits

Physical Properties of Weissbergite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Steel-gray
Streak:Dark gray
Hardness (Mohs):1½
Tenacity:Brittle
Cleavage:Perfect
Four different cleavages: one perfect, two very good, one good.
Density (measured):5.79 g/cm3
Density (calculated):6.22 g/cm3

Crystallography of Weissbergite

Crystal System:Triclinic
Class (H-M):1 - Pedial
Space Group:P1
Space Group Setting:P1
Cell Parameters:a = 11.8Å, b = 6.4Å, c = 6.1Å
α = 109.9°, β = 81.8°, γ = 105.4°
Ratio:a:b:c = 1.844 : 1 : 0.953
Unit Cell Volume:V 416.92 ų (Calculated from Unit Cell)
Z:4
Morphology:Frequently anhedral granular.
X-Ray Powder Diffraction:
d-spacingIntensity
3.75 (10)
3.71 (10)
3.65 (10)
3.58 (10)
2.97 (100)
2.84 (10)
2.35 (10)
1.49 (10)
Comments:ICDD 29-1331 (synthetic)

Optical Data of Weissbergite

Type:Anisotropic
Anisotropism:Strong
Reflectivity:
nmR= = 35.0 - 36.8 (546 nm%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 0%.

Chemical Properties of Weissbergite

Formula:
TlSbS
 
2
Essential elements:S, Sb, Tl
All elements listed in formula:S, Sb, Tl

Relationship of Weissbergite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.HD.05Lorándite
TlAsS
 
2
2.HD.15Christite
TlHgAsS
 
3
2.HD.20Jankovićite
Tl
 
5
Sb
 
9
(As,Sb)
 
4
S
 
22
2.HD.20Jankovicite
2.HD.25Rebulite
Tl
 
5
Sb
 
5
As
 
8
S
 
22
2.HD.30Imhofite
Tl
 
6
CuAs
 
16
S
 
40
2.HD.35Edenharterite
PbTlAs
 
3
S
 
6
2.HD.40Jentschite
TlPbAs
 
2
SbS
 
6
2.HD.45Hutchinsonite
(Tl,Pb)
 
2
As
 
5
S
 
9
2.HD.50Bernardite
Tl(As,Sb)
 
5
S
 
8
2.HD.55Sicherite
TlAg
 
2
(As,Sb)
 
3
S
 
6
2.HD.60Gabrielite
Tl
 
6
Ag
 
3
Cu
 
6
(As,Sb)
 
9
S
 
21
Related Minerals - Hey's Index Grouping:

- +
5.5.1Lorándite
TlAsS
 
2
5.5.2Ellisite
Tl
 
3
AsS
 
3
5.5.3Imhofite
Tl
 
6
CuAs
 
16
S
 
40
5.5.4Simonite
TlHgAs
 
3
S
 
6
5.5.6Christite
TlHgAsS
 
3
5.5.6Routhierite
Tl(Cu,Ag)(Hg,Zn)
 
2
(As,Sb)
 
2
S
 
6
5.5.7Hutchinsonite
(Tl,Pb)
 
2
As
 
5
S
 
9
5.5.8Wallisite
(Cu,Ag)TlPbAs
 
2
S
 
5
5.5.9Bernardite
Tl(As,Sb)
 
5
S
 
8
5.5.10Vrbaite
Tl
 
4
Hg
 
3
Sb
 
2
As
 
8
S
 
20
5.5.11Rebulite
Tl
 
5
Sb
 
5
As
 
8
S
 
22
5.5.12Gillulyite
Tl
 
2
(As,Sb)
 
8
S
 
13
5.5.14Rohaite
(Tl,Pb,K)
 
2
Cu
 
8.7
Sb
 
2
S
 
4
5.5.15Vaughanite
TlHgSb
 
4
S
 
7
5.5.16Chalcothallite
Tl
 
2
(Cu,Fe)
 
6
SbS
 
4
5.5.17Pierrotite
Tl
 
2
Sb
 
6
As
 
4
S
 
16
5.5.18Parapierrotite
Tl(Sb,As)
 
5
S
 
8
5.5.19Criddleite
TlAg
 
2
Au
 
3
Sb
 
10
S
 
10
5.5.20Chabournéite
Tl
 
21-x
Pb
 
2x
(Sb,As)
 
91-x
S
 
147
 (x = 0-17.5)

Other Names for Weissbergite

Synonyms:
IMA1975-040
Other Languages:
German:Weissbergit
Russian:Вейссбергит
Simplified Chinese:维硫锑铊矿
Spanish:Weissbergita

Other Information

Health Warning:Contains thallium - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest.

References for Weissbergite

Reference List:

- +
American Mineralogist (1977): 62: 720-724.

Mineralogical Record (1993): 24: 446.

Internet Links for Weissbergite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Weissbergite details from Handbook of Mineralogy (PDF)
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    • Localities for Weissbergite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Republic of Macedonia
     
    • Roszdan
    		[Rieck, B. (1993) - Famous mineral localities: Allchar, Macedonia, Mineralogical Record, 24 (6), 437-449]
    Switzerland
     
    • Wallis (Valais)
      • Binn Valley
        • Im Feld (Imfeld; Feld; Fäld)
    		EDX analysis by Th. Raber, May 2012, XRD analyses by Prof. Nestola, Padova, Italy, November 2012
    USA
     
    • Nevada
      • Eureka Co.
        • Lynn District
          • Elko
    		Amer.Min.(1977) 62, 720-724; Min.Rec.:20:469.
    • Utah
      • Tooele Co.
        • Little Valley
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