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About Pearceite-T2acHide

2 - 3
Specific Gravity:
6.18 - 6.23
Crystal System:
For Richard Pearce (1837-1927), US chemist
A polytype of Pearceite

Pearceite-Polybasite series

The old species "arsenpolybasite" is now classified as the polytypes Pearceite-T2ac or Pearceite-M2a2b2c (redefinition; see Bindi et al., 2007).

Classification of Pearceite-T2acHide


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

Physical Properties of Pearceite-T2acHide

Dark red in transmitted light
2 - 3 on Mohs scale
Imperfect od {001}
6.18 - 6.23 g/cm3 (Measured)    

Crystallography of Pearceite-T2acHide

Crystal System:
Class (H-M):
3 2 - Trapezohedral
Space Group:
P3 2 1
Cell Parameters:
a = 14.9746(17) Å, c = 11.9982(6) Å
a:c = 1 : 0.801
Unit Cell V:
2,330.01 ų (Calculated from Unit Cell)
Data from Bindi et al. (2007).

First Recorded Occurrence of Pearceite-T2acHide

Synonyms of Pearceite-T2acHide

Other Language Names for Pearceite-T2acHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Rammelsbergite3 photos of Pearceite-T2ac associated with Rammelsbergite on
Nickelskutterudite3 photos of Pearceite-T2ac associated with Nickelskutterudite on
Proustite3 photos of Pearceite-T2ac associated with Proustite on
Rhodochrosite3 photos of Pearceite-T2ac associated with Rhodochrosite on

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

5.2.1SmithiteAgAsS2Mon. 2/m
5.2.3ProustiteAg3AsS3Trig. 3m (3 2/m) : R3c
5.2.4XanthoconiteAg3AsS3Mon. 2/m : B2/b
5.2.5Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]Trig. 3m (3 2/m) : P3m1
5.2.7ArgentotennantiteAg6Cu4(Fe2+,Zn)2As4S12SIso. 4 3m : I4 3m
5.2.8MiargyriteAgSbS2Mon. 2/m : B2/b
5.2.9PyrargyriteAg3SbS3Trig. 3m : R3c
5.2.10PyrostilpniteAg3SbS3Mon. 2/m : P21/b
5.2.11StephaniteAg5SbS4Orth. mm2 : Cmc21
5.2.12Polybasite[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]Mon. 2/m : B2/m
5.2.13BillingsleyiteAg7AsS6Iso. 2 3 : P21 3
5.2.14Polybasite-TacTrig. 3m (3 2/m) : P3m1
5.2.15Freibergite(Ag,Cu,◻)10Fe2+2Sb4S12Iso. 4 3m : I4 3m
5.2.16AramayoiteAg3Sb2(Bi,Sb)S6Tric. 1 : P1
5.2.17MatilditeAgBiS2Trig. 3m (3 2/m) : P3m1
5.2.19PavoniteAgBi3S5Mon. 2/m : B2/m
5.2.21BohdanowicziteAgBiSe2Trig. 3m (3 2/m) : P3m1
5.2.23Benleonardite[Ag6(Sb,As)2S6Te] [Ag9Cu(S,Te)2Te2]Trig. 3m (3 2/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.

References for Pearceite-T2acHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Frondel, C. (1963) Isodimorphism of the polybasite and pearceite series. American Mineralogist: 48: 565-572.
International Mineralogical Association: Commission on New Minerals and Mineral Names (1967) Mineralogical Magazine: 36: 131-136.
Hall, H.T. (1967) The pearceite and polybasite series. American Mineralogist: 52: 1311-1321.
Bindi, L., Evain, M., Menchetti, S. (2006) Temperature dependence of the silver distribution in the crystal structure of natural pearceite, (Ag,Cu)16(As,Sb)2S11. Acta Crystallographica: B62: 212-219.
Evain, M., Bindi L., Menchetti, S. (2006) Structural complexity in minerals: twinning, polytypism and disorder in the crystal structure of polybasite, (Ag,Cu)16(Sb,As)2S11. Acta Crystallographica: B62: 447-456.
Evain, M., Bindi L., Menchetti, S. (2006) Structure and phase transition of the Se-rich variety of antimonpearceite, [(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2]. Acta Crystallographica: B62: 768-774.
Bindi, L., Evain, M., Spry, P.G., Menchetti, S. (2007) The pearceite-polybasite group of minerals: Crystal chemistry and new nomenclature rules. American Mineralogist: 92: 918-925.

Internet Links for Pearceite-T2acHide

Localities for Pearceite-T2acHide

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.
  • Hunan
    • Chenzhou
      • Guiyang Co.
        • Baoshan ore field (Baoshan Mine)
Mingjun Yang and Gonghua Tan (1991): Mining Geology 12(2), 118-121
    • Hengyang
      • Changning Co.
        • Shuikoushan ore field
Nanshi Zeng, Eiji Izawa, Yoshinobu Motomura, and Lairen Lai (2000): The Canadian Mineralogist 38, 11-22.
  • Jilin
    • Siping
      • Lishu Co.
Liyan Zhang and Jigang Tang (1996): Geology and Prospecting 32(3), 23-27
Czech Republic
  • Karlovy Vary Region
Jakub Plasil
  • Ústí nad Labem Region
    • Klášterec nad Ohří
No reference listed
  • Baden-Württemberg
    • Black Forest
      • Alpirsbach
        • Reinerzau District
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
      • Schenkenzell
        • Wittichen
          • Böckelsbach valley
Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
          • Burgfelsen
No reference listed
          • Heubach Valley
No reference listed
  • Hesse
    • Odenwald
      • Mühltal
        • Nieder-Beerbach
  • Saxony
    • Mittelsachsen
      • Freiberg
C. Frondel (1963): Isodimorphism of the polybasite and pearceite series.- American Mineralogist 48, 565-572
  • Sumatra
    • Sumatera Barat Province (West Sumatra Province)
Econ Geol (1997) 92:468-484
  • Tuscany
    • Lucca Province
      • Stazzema
        • Sant'Anna di Stazzema
Menchetti S., 1970. Sulla arsenpolibasite del Canale dell’Angina (Alpi Apuane). Atti Soc. Tosc. Sci. Nat., Mem., 77: 111-122.
  • Kostanay Region
    • Rudny
[World of Stones 12:13]
  • Lima
    • Oyon Province
Hyrsl & Rosales (2003) Mineralogical Record, 34, 241-254.
  • Chukotka Autonomous Okrug
    • Chukchi Peninsula (Chukotka Peninsula; Chukotski Peninsula)
K. A. Novoselov, V. A. Kotlyarov und E. V. Belogub (2010): Silver sulfoselenide from ore of the Valunisty Au-Ag deposit, Chukchi Peninsula. Geology of Ore Deposits 52, 811-814.
  • Grisons
    • Vorderrhein Valley
      • Tujetsch (Tavetsch)
        • Curnera Valley
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 52
  • Colorado
    • Lake Co.
      • Leadville Mining District
Minerals of Colorado (1997) Eckel, E. B.
    • Park Co.
Minerals of Colorado (1997) Eckel, E. B.
    • Summit Co.
      • Montezuma Area
Minerals of Colorado (1997) Eckel, E. B.
  • Washington
    • Chelan Co.
      • Wenatchee Mining District
        • Wenatchee
          • Squillchuck Creek
Lasmanis, R. (1995): Mineral News: A Compendium of Wenatchee District Mineralogy, Chelan County, Washington, p.6-7
Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
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