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Vaughanite

A valid IMA mineral species
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About VaughaniteHide

04540670015143741494393.jpg
David J. Vaughan
Formula:
TlHgSb4S7
Colour:
Light gray
Lustre:
Metallic
Hardness:
3 - 3½
Specific Gravity:
5.56 (Calculated)
Crystal System:
Triclinic
Name:
Named in honor of David John Vaughan (b. 1946), chair in mineralogy, University of Manchester, England, for his many outstanding contributions to ore mineralogy and ore microscopy.
This page provides mineralogical data about Vaughanite.


Unique IdentifiersHide

Mindat ID:
4162
Long-form identifier:
mindat:1:1:4162:7
GUID
(UUID V4):
bf9c7d4c-8e4b-4db6-b81e-41ddf4a33a24

IMA Classification of VaughaniteHide

Classification of VaughaniteHide

2.LA.20

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
L : Unclassified Sulfosalts
A : Without essential Pb
3.8.15.1

3 : SULFOSALTS
8 : 1 < ø < 2
5.5.15

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
VghIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of VaughaniteHide

Metallic
Transparency:
Opaque
Colour:
Light gray
Streak:
Black
Hardness:
3 - 3½ on Mohs scale
Hardness:
VHN25=100 - 115 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
Weak
Density:
5.56 g/cm3 (Calculated)

Optical Data of VaughaniteHide

Anisotropism:
Moderate to strong: purple, purplish brown-gray, brownish yellow, greenish yellow, sage-green, bluish green, dark blue-bottle-green.
Bireflectance:
Weak to moderate
Reflectivity:
WavelengthR1R2
400nm35.2%41.0%
420nm35.1%40.8%
440nm34.6%40.2%
460nm33.9%39.4%
480nm33.3%39.1%
500nm32.8%39.1%
520nm32.5%39.4%
540nm32.0%39.4%
560nm31.4%39.2%
580nm30.9%38.8%
600nm30.4%38.5%
620nm30.1%37.9%
640nm29.7%36.9%
660nm29.2%35.9%
680nm28.6%35.9%
700nm28.0%34.2%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 41.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Pale gray
Internal Reflections:
Blood red - rare
Pleochroism:
Weak
Comments:
Slightly greenish grey to a slightly darker bluish grey
Comments:
When immersed in oil (ND 1.515), the bireflectance and reflectance pleochroism are enhanced.

Chemistry of VaughaniteHide

Mindat Formula:
TlHgSb4S7

Crystallography of VaughaniteHide

Crystal System:
Triclinic
Cell Parameters:
a = 9.012(3) Å, b = 13.223(3) Å, c = 5.906(2) Å
α = 93.27(3)°, β = 95.05(4)°, γ = 109.16(3)°
Ratio:
a:b:c = 0.682 : 1 : 0.447
Unit Cell V:
659.46 ų
Z:
2
Morphology:
Anhedral grains, to 200 µm.
Comment:
Point Group: 1 or 1; Space Group: P1 or P1.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.343 Å(30)
4.204 Å(100)
3.313 Å(60)
2.749 Å(40)
2.315 Å(30)
Comments:
Five strongest lines from type material

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-𝑇 alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of VaughaniteHide

General Appearance of Type Material:
Massive aggregates to 450 µm.
Place of Conservation of Type Material:
British Museum of Natural History, London, UK, BM 1987,95, polished section E.1220.
National Mineral Collection, Geological Survey of Canada, Ottawa, Ontario, Canada, NMC 65497.
Geological Setting of Type Material:
epithermal gold deposit
Associated Minerals at Type Locality:
Reference:
Harris, D.C., Roberts, A.C., Criddle, A.J. (1989) Vaughanite (TlHgSb4S7), a new mineral from the Hemlo gold deposit, Hemlo, Ontario, Canada. Mineralogical Magazine: 53: 79-83.

Synonyms of VaughaniteHide

Other Language Names for VaughaniteHide

German:Vaughanit
Simplified Chinese:硫锑汞铊矿
Spanish:Vaughanita

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Vaughanite associated with PääkköneniteSb2AsS2
2 photos of Vaughanite associated with StibarsenAsSb
2 photos of Vaughanite associated with RealgarAs4S4

Related Minerals - Strunz-mindat GroupingHide

2.LA.GladkovskyiteMnTlAs3S6Trig. 3m : R3c
2.LA.BiagioniiteTl2SbS2Mon. m : Pb
2.LA.ThunderbayiteTlAg3Au3Sb7S6Tric. 1 : P1
2.LA.AuerbakhiteMnTl2As2S5Orth.
2.LA.Ferrofettelite[Ag6As2S7][Ag10FeAs2S8]Mon. 2 : B2
2.LA.10DervilliteAg2AsS2Mon. 2/m : P2/b
2.LA.15DaomaniteCuPtAsS2Orth.
2.LA.25CriddleiteTlAg2Au3Sb10S10Mon.
2.LA.30Fettelite[Ag6As2S7][Ag10HgAs2S8] Mon. 2 : B2
2.LA.35Chaméanite(Cu,Fe)4As(Se,S)4Iso.
2.LA.40ArcubisiteAg6CuBiS4
2.LA.45MgriiteCu3AsSe3Iso. m3m (4/m 3 2/m)
2.LA.50Benleonardite[Ag6(Sb,As)2S6Te][Ag9Cu(S,Te)2Te2]Trig. 3m (3 2/m) : P3m1
2.LA.55TsnigriiteAg9SbTe3S3Mon.
2.LA.60BorovskitePd3SbTe4Iso.
2.LA.65JonassoniteAuBi5S4Mon.
2.LA.65NuwaiteNi6GeS2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
2.LA.65ButianiteNi6SnS2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
2.LA.70RaberiteTl5Ag4As6SbS15 Tric. 1 : P1
2.LA.75SpaltiiteTl2Cu2As2S5Mon. 2/m : P21/b

Other InformationHide

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

Internet Links for VaughaniteHide

References for VaughaniteHide

Localities for VaughaniteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Canada
 
  • Ontario
    • Thunder Bay District
      • Bomby Township
 
矿物 and/or 产地  
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