Ustarasite (original) (raw)

A valid IMA mineral species - grandfathered - questionable

Formula:

Pb(Bi,Sb)6S10 (?)

Colour:

Silver-grey, white in reflected light.

Name:

Named after its discovery locality, the Ustarasay deposit, Uzbekistan.

"Ustarasite was defined by Sakharova (1955) on the basis of chemical analysis and X-ray powder data. The mineral is compositionally close to synthetic Phase V of Otto & Strunz (1968), which is ∼PbBi4S7 (lillianite–pavonite super-family).
Unit-cell data are needed to validate ustarasite." (Moëlo et al., 2008).

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:4123:8

a0154656-2197-4d75-add8-53babb359e5e

IMA Classification of UstarasiteHide

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Approved, 'Grandfathered' (first described prior to 1959), Questionable

IMA Formula:

Pb(Bi,Sb)6S10

Type description reference:

Classification of UstarasiteHide

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2.JB.40e

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

3.8.11.1

3 : SULFOSALTS
8 : 1 < ø < 2

5.6.33

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

Mineral SymbolsHide

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

Physical Properties of UstarasiteHide

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Colour:

Silver-grey, white in reflected light.

Cleavage:

Perfect
One perfect; another present

Optical Data of UstarasiteHide

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Colour in reflected light:

white

Chemistry of UstarasiteHide

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Mindat Formula:

Pb(Bi,Sb)6S10 (?)

Common Impurities:

Cu,Fe,As

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of UstarasiteHide

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General Appearance of Type Material:

Prismatic crystals; may be bent or twisted.

Associated Minerals at Type Locality:

Reference:

Sakharova, M. S. (1955): Bismuth sulfosalts of Ustarasaisk deposit. Trudy Mineralogicheskogo Muzeya, Akademiya Nauk SSSR (1955), 7, 112-126

Other Language Names for UstarasiteHide

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Varieties of UstarasiteHide

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Relationship of Ustarasite to other SpeciesHide

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Other Members of this group:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Health Risks:

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

Internet Links for UstarasiteHide

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References for UstarasiteHide

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Reference List:

Moëlo, Yves, Makovicky, Emil, Mozgova, Nadejda N., Jambor, John L., Cook, Nigel, Pring, Allan, Paar, Werner, Nickel, Ernest H., Graeser, Stephan, Karup-Møller, Sven, Balic-Žunic, Tonči, Mumme, William G., Vurro, Filippo, Topa, Dan (2008) Sulfosalt systematics: a review. Report of the sulfosalt sub-committee of the IMA Commission on Ore Mineralogy. European Journal of Mineralogy, 20 (1) 7-62 doi:10.1127/0935-1221/2008/0020-1778

Localities for UstarasiteHide

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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

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- 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.