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UM1992-21-S:AgFeSb

Valid as an unnamed mineral
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Formula:
Ag6(Ag4Fe2+2)Sb4S12S
Crystal System:
Isometric
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-(Zn).

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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Unique IdentifiersHide

Mindat ID:
52185
Long-form identifier:
mindat:1:1:52185:5

Similar NamesHide

UM1982-11-S:CuFeSbCu6Fe6Sb4S13

IMA Classification of UM1992-21-S:AgFeSbHide

IMA status notes:
Unnamed (probably valid)

Classification of UM1992-21-S:AgFeSbHide

Strunz-mindat (2025):
2.GB.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
B : Neso-sulfarsenites, etc. with additional S

Optical Data of UM1992-21-S:AgFeSbHide

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

Chemistry of UM1992-21-S:AgFeSbHide

Mindat Formula:
Ag6(Ag4Fe2+2)Sb4S12S
Element Weights:
Element% weight
Ag51.507 %
Sb23.256 %
S19.904 %
Fe5.333 %

Calculated from ideal end-member formula.
Elements listed:
Ag, Fe, S, Sb - search for minerals with similar chemistry

Crystallography of UM1992-21-S:AgFeSbHide

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

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

Member of:
Rozhdestvenskayaite Subgroup > Tetrahedrite Group
Other Members of Rozhdestvenskayaite Subgroup:
Kenorozhdestvenskayaite-(Fe)[Ag6]4+(Ag4Fe2+2)Sb4S12◻Iso. 4 3m : I4 3m
Rozhdestvenskayaite-(Zn)Ag6(Ag4Zn2)Sb4S12SIso. 4 3m : I4 3m

Related Minerals - Strunz-mindat GroupingHide

2.GB.Polybasite-Tac[Ag6Sb2S7][Ag9CuS4]Trig. 3m (3 2/m) : P3m1
2.GB.Kenoargentotetrahedrite-(Zn)[Ag6]4+(Cu4Zn2)Sb4S12◻Iso. 4 3m : I4 3m
2.GB.Argentotetrahedrite-(Hg)Ag6(Cu4Hg2)Sb4S12SIso. 4 3m : I4 3m
2.GB.Annivite-(Zn)Cu6(Cu4Zn2)Bi4S12SIso. 4 3m : I4 3m
2.GB.Pošepnýite(Cu+3◻3)(Hg2+4Cu+2)Sb4Se12(Se0.5◻0.5)Iso. 4 3m : I4 3m
2.GB.Tennantite-(Cu)Cu6(Cu4Cu2)As4S12SIso. 4 3m : I4 3m
2.GB.Argentopolybasite[Ag6Sb2S7][Ag9AgS4]Trig. 3 2 : P3 2 1
2.GB.Tennantite-(Mn)Cu6(Cu4Mn2)As4S12SIso. 4 3m : I4 3m
2.GB.Argentotetrahedrite-(Cd)Ag6(Cu4Cd2)Sb4S12SIso. 4 3m : I4 3m
2.GB.Stibioústalečite(Cu4Cu2)(Cu4Cu+2)(Sb2Te2)Se12SeIso. 4 3m : I4 3m
2.GB.Stibiogoldfieldite(Cu4Cu2)(Cu4Cu+2)(Sb2Te2)S12SIso. 4 3m : I4 3m
2.GB.Argentotetrahedrite-(Zn)Ag6(Cu4Zn2)Sb4S12SIso. 4 3m : I4 3m
2.GB.Tetrahedrite-(Cd)Cu6(Cu4Cd2)Sb4S12SIso. 4 3m : I4 3m
2.GB.Arsenogoldfieldite(Cu4Cu2)(Cu4Cu+2)(As2Te2)S12SIso. 4 3m : I4 3m
2.GB.Arsenoústalečite(Cu4Cu2)(Cu4Cu+2)(As2Te2)Se12SeIso. 4 3m : I4 3m
2.GB.Tennantite-(In)Cu6(Cu4(In3+Cu+))As4S12SIso. 4 3m : I4 3m
2.GB.Zvěstovite-(Fe)Ag6(Ag4Fe2+2)As4S12SIso. 4 3m : I4 3m
2.GB.Hakite-(Fe)Cu6(Cu4Fe2+2)Sb4Se12SeIso. 4 3m : I4 3m
2.GB.Tennantite-(Cd)Cu6(Cu4Cd2)As4S12SIso. 4 3m : I4 3m
2.GB.XKenorozhdestvenskayaite-(Fe)[Ag6]4+(Ag4Fe2+2)Sb4S12◻Iso. 4 3m : I4 3m
2.GB.Tetrahedrite-(Cu)Cu6(Cu4Cu2+2)Sb4S12SIso. 4 3m : I4 3m
2.GB.Hakite-(Zn)Cu6(Cu4Zn2)Sb4Se12SeIso. 4 3m : I4 3m
2.GB.Zvěstovite-(Zn)Ag6(Ag4Zn2)As4S12SIso.
2.GB.Hakite-(Cd)Cu6(Cu4Cd2)Sb4Se12SeIso. 4 3m : I4 3m
2.GB.Kenoargentotennantite-(Fe)[Ag6]4+(Cu4Fe2)As4S12◻Iso.
2.GB.Tennantite-(Hg)Cu6(Cu4Hg2)As4S12SIso. 4 3m : I4 3m
2.GB.Tetrahedrite-(Mn)Cu6(Cu4Mn2)Sb4S12SIso. 4 3m : I4 3m
2.GB.Tennantite-(Ni)Cu6(Cu4Ni2)As4S12SIso. 4 3m : I4 3m
2.GB.Tetrahedrite-(Ni)Cu6(Cu4Ni2)Sb4S12SIso. 4 3m : I4 3m
2.GB.05Hakite-(Hg)Cu6(Cu4Hg2)Sb4Se12SeIso. 4 3m : I4 3m
2.GB.05Rozhdestvenskayaite-(Zn)Ag6(Ag4Zn2)Sb4S12SIso. 4 3m : I4 3m
2.GB.05Argentotennantite-(Zn)Ag6(Cu4Zn2)As4S12SIso. 4 3m : I4 3m
2.GB.05Argentotennantite-(Fe)Ag6(Cu4Fe2)As4S12SIso. 4 3m : I4 3m
2.GB.05Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1Iso. 4 3m : I4 3m
2.GB.05Tennantite SubgroupCu6(Cu4C2+2)As4S12SIso. 4 3m : I4 3m
2.GB.05Tennantite-(Zn)Cu6(Cu4Zn2)As4S12SIso. 4 3m : I4 3m
2.GB.05Tetrahedrite-(Zn)Cu6(Cu4Zn2)Sb4S12SIso. 4 3m : F4 3m
2.GB.05Tetrahedrite SubgroupCu6(Cu4C2+2)Sb4S12SIso. 4 3m : I4 3m
2.GB.05Tennantite-(Fe)Cu6(Cu4Fe2+2)As4S12SIso. 4 3m : I4 3m
2.GB.05Tetrahedrite-(Fe)Cu6(Cu4Fe2+2)Sb4S12SIso. 4 3m : I4 3m
2.GB.05Tetrahedrite-(Hg)Cu6(Cu4Hg2)Sb4S12SIso. 4 3m : I4 3m
2.GB.05Kenoargentotetrahedrite-(Fe)[Ag6]4+(Cu4Fe2+2)Sb4S12◻Iso. 4 3m : I4 3m
2.GB.05Giraudite-(Zn)Cu6(Cu4Zn2)As4Se12SeIso. 4 3m : I4 3m
2.GB.05Argentotetrahedrite-(Fe)Ag6(Cu4Fe2)Sb4S12SIso. 4 3m : I4 3m
2.GB.05Goldfieldite(Cu4◻2)(Cu4Cu+2)Te4S12SIso. 4 3m : I4 3m
2.GB.10SelenostephaniteAg5SbSe4Orth. 2 2 2 : P21 21 21
2.GB.10StephaniteAg5SbS4Orth. mm2 : Cmc21
2.GB.15UM2003-14-S:AgBiFeTeAg16FeBiTe3S8
2.GB.15UM1979-17-S:BiCuFe~Cu18Fe4BiS16
2.GB.15Pearceite[Ag6As2S7][Ag9CuS4]Trig. 3m (3 2/m) : P3m1
2.GB.15ArgentopearceiteAg16As2S11Trig. 3 2 : P3 2 1
2.GB.15Cupropolybasite[Cu6Sb2S7][Ag9CuS4]Trig. 3m : P3 1m
2.GB.15Fengruiite[Ag6Sb2S7][Ag9CuS2Te2]Trig. 3m (3 2/m) : P3m1
2.GB.15Auropearceite [Ag9AuS4][Ag6As2S7]Trig. 3 2 : P3 2 1
2.GB.15Selenopolybasite[(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2]Trig. 3m (3 2/m) : P3m1
2.GB.15Polybasite[Ag6Sb2S7][Ag9CuS4]Mon. 2/m : B2/m
2.GB.15Auropolybasite [Ag9AuS4][Ag6Sb2S7]Trig. 3 2 : P3 2 1
2.GB.15Cupropearceite[Cu6As2S7][Ag9CuS4]Trig. 3m (3 2/m) : P3m1
2.GB.20Vorontsovite(Hg5Cu)Σ6TlAs4S12Iso. 4 3m : I4 3m
2.GB.20Ferrovorontsovite(Fe5Cu)Σ6TlAs4S12Iso. 4 3m : I4 3m
2.GB.20Galkhaite(Hg5Cu)CsAs4S12Iso. 4 3m : I4 3m

Other InformationHide

Notes:
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.

Internet Links for UM1992-21-S:AgFeSbHide

References 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 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.
Russia
 
  • Sakha
    • Verkhoyansk Fold Belt
      • Verkhoyansk Silver Province
        • Khachakchan ore cluster
Zhdatov et al. (1992) +1 other reference
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