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Argentopolybasite-T2ac

A structural variant of Argentopolybasite
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A polytype of Argentopolybasite

Approved by the IMA.


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Unique IdentifiersHide

Mindat ID:
55911
Long-form identifier:
mindat:1:1:55911:3

IMA Classification of Argentopolybasite-T2acHide

IMA status:
Pending publication

Chemistry of Argentopolybasite-T2acHide

Mindat Formula:
Ag16Sb2S11
Element Weights:
Element% weight
Ag74.324 %
S15.189 %
Sb10.487 %

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

Chemical AnalysisHide

Empirical formulas:
Sample IDEmpirical Formula
1(1) (Ag15.94Cu0.18)?16.12(Sb1.40As0.61)?2.01(S10.60Se0.25Cl0.03)?10.88; (2) Ag16.30(Sb1.74As0.22)?1.96(S10.69Cl0.04)?10.73; (3) (Ag15.54Cu0.38)?15.92(Sb1.56As0.51)?2.07S11.01
Sample references:
IDLocalityReferenceNotes
1Kremnica Au-Ag deposit, Kremnica, Žiar nad Hronom District, Banská Bystrica Region, Slovakia
by EPMA-WDS; 1 = Kremnica material, 2 = Nová Baňa material, 3 = Arykevaam material; empirical formulae basis: 29 apfu

Crystallography of Argentopolybasite-T2acHide

Crystal System:
Trigonal
Class (H-M):
32 - Trapezohedral
Space Group:
P321
Cell Parameters:
a = 15.0646(5) Å, c = 12.2552(5) Å
Ratio:
a:c = 1 : 0.814
Unit Cell V:
2,408.61 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
12.169 Å(40)
3.162 Å(100)
3.045 Å(54)
2.881 Å(45)
2.691 Å(23)
2.547 Å(22)
2.426 Å(28)
1.886 Å(22)

First Recorded Occurrence of Argentopolybasite-T2acHide

Co-First Recorded Localities:
ⓘ Arykevaam deposit, Anadyrsky District, Chukotka Autonomous Okrug, Russia
ⓘ Šibeničný vrch, Nová Baňa, Žarnovica District, Banská Bystrica Region, Slovakia
ⓘ Kremnica Au-Ag deposit, Kremnica, Žiar nad Hronom District, Banská Bystrica Region, Slovakia
Place of Conservation of First Recorded Material:
collections of (1) the Department of Mineralogy and Petrology, National Museum in Prague, Cirkusová 1740, 19300 Prague 9, Czech Republic, catalogue numbers P1P 59/2021 (holotype) and (2) P1P 60/2021 (cotype from Nová Baňa); and (3) the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5818/1 (cotype from Arykevaam)

Other Language Names for Argentopolybasite-T2acHide

Relationship of Argentopolybasite-T2ac to other SpeciesHide

Member of:
Pearceite-Polybasite Group
Other Members of Pearceite-Polybasite Group:
ArgentopearceiteAg16As2S11Trig. 32 : P321
Argentopolybasite[Ag6Sb2S7][Ag9AgS4]Trig. 32 : P321
Auropearceite [Ag9AuS4][Ag6As2S7]Trig. 32 : P321
Auropolybasite[Ag9AuS4][Ag6Sb2S7]Trig. 32 : P321
Benleonardite[Ag6(Sb,As)2S6Te][Ag9Cu(S,Te)2Te2]Trig. 3m(32/m) : P3m1
Cupropearceite[Cu6As2S7][Ag9CuS4]Trig. 3m(32/m) : P3m1
Cupropolybasite[Cu6Sb2S7][Ag9CuS4]Trig. 3m : P31m
Fengruiite[Ag6Sb2S7][Ag9CuS2Te2]Trig. 3m(32/m) : P3m1
Pearceite[Ag6As2S7][Ag9CuS4]Trig. 3m(32/m) : P3m1
Polybasite[Ag6Sb2S7][Ag9CuS4]Mon. 2/m : B2/m
Selenopolybasite[(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2]Trig. 3m(32/m) : P3m1

Other InformationHide

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 Argentopolybasite-T2acHide

References for Argentopolybasite-T2acHide

Localities for Argentopolybasite-T2acHide

Showing 4 localities.

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.
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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 (FRL)
 
  • Chukotka Autonomous Okrug
    • Anadyrsky District
Miyawaki et al. (2022)
Slovakia (FRL)
 
  • Banská Bystrica Region
    • Žarnovica District
      • Nová Baňa
Miyawaki et al. (2022)
    • Žiar nad Hronom District
      • Kremnica
Miyawaki et al. (2022)
USA
 
  • California
    • Alpine County
      • Silver Mountain Mining District
        • Silver Mountain
          • IXL Canyon (I.X.L. Canyon)
Bindi et al. (2023)
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