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Crystal System:
Almost certainly not identical to now recognized argentotetrahedrite (also differs in the unit cell parameter).

The species seems to be the Fe analogue of rozhdestvenskayaite.

Forms aggregates, 0.002-0.03 mm in diameter, in cavities of siderite; associates: argentian pyrite, tetrahedrite. May also reside in a silver amalgam.

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Classification of UM1992-21-S:AgFeSbHide

Unnamed (probably valid)

Optical Data of UM1992-21-S:AgFeSbHide

Colour in reflected light:
gray with a bluish hue
Internal Reflections:
very rare, dark cherry red

Chemical Properties of UM1992-21-S:AgFeSbHide


Crystallography of UM1992-21-S:AgFeSbHide

Crystal System:
Cell Parameters:
a = 10.92 Å
Unit Cell V:
1,302.17 ų (Calculated from Unit Cell)
the a parameter may increase with Ag content

Relationship of UM1992-21-S:AgFeSb to other SpeciesHide

Other Members of this group:
ArgentotennantiteAg6Cu4(Fe2+,Zn)2As4S12SIso. 4 3m : I4 3m
Argentotetrahedrite-(Fe)Ag6Cu4(Fe2+,Zn)2Sb4S12SIso. 4 3m : I4 3m
Freibergite(Ag,Cu,◻)10Fe2+2Sb4S12Iso. 4 3m : I4 3m
GirauditeCu6Cu4(Fe2+,Zn)2As4Se12SIso. 4 3m : I4 3m
Goldfieldite(Cu102)Te4S12SIso. 4 3m : I4 3m
Hakite-(Hg)Cu6Cu4Hg2Sb4Se12SeIso. 4 3m : I4 3m
Rozhdestvenskayaite-(Zn)Ag6Ag4Zn2Sb4S12SIso. 4 3m : I4 3m
TennantiteCu6[Cu4(X)2]As4S12SIso. 4 3m : I4 3m
TetrahedriteCu6Cu4(X)2Sb4S13Iso. 4 3m : I4 3m

Other InformationHide

unaffected by light
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 UM1992-21-S:AgFeSbHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Zhdatov, Yu.Ya., Amuzinskiy, V.A., Andrianov, N.G. (1992): A natural variety of silver-rich tetrahedrite with a large unit-cell parameter. Doklady Akad' Nauk SSSR: 326(2): 337 -340 (in Russian); in: Jambor, J.L., Grew, E.S. (1994): New mineral Names. American Mineralogist: 79: 390
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; (2016)

Internet Links for UM1992-21-S:AgFeSbHide

Localities for UM1992-21-S:AgFeSbHide

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.
  • Sakha Republic (Yakutia)
    • Verkhoyansk Fold Belt
      • Verkhoyansk Silver Province
        • Khachakchan ore cluster
Zhdatov, Yu.Ya., Amuzinskiy, V.A., Andrianov, N.G. (1992): A natural variety of silver-rich tetrahedrite with a large unit-cell parameter. Doklady Akad' Nauk SSSR: 326(2): 337 -340 (in Russian); in: Jambor, J.L., Grew, E.S. (1994): New mineral Names. American Mineralogist: 79: 390
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