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Polybasite-Tac

Big Photo

Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany
© Stephan Wolfsried

Show Polybasite-Tac Photos (16)
Formula:
(Ag,Cu)
 
16
(Sb,As)
 
2
S
 
11
System:TrigonalHardness:3


Previously known as "Antimonpearceite", which was originally described from Sonora, Mexico.

Classification of Polybasite-Tac

Strunz 8th edition ID:2/E.05-30

2 : Sulphides
E : Sulphosalts (S : As,Sb,Bi = x), Sulphosalts with predominant Fe and Cu and x = 2.0
05 : Billingsleyite - Polybasite series
Strunz 9th edition ID:2.GB.

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
Dana 8th edition ID:3.1.8.2

3 : SULFOSALTS
1 : ø > 4
Hey's CIM Ref.:5.2.14

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

Hardness (Mohs):3

Crystallography of Polybasite-Tac

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:P3m1 (P3 2/m 1)
Cell Parameters:a = 7.595Å, c = 12.0731Å
Ratio:a:c = 1 : 1.59
Unit Cell Volume:V 603.12 ų
Z:1

Chemical Properties of Polybasite-Tac

Formula:
(Ag,Cu)
 
16
(Sb,As)
 
2
S
 
11
Essential elements:Ag, S, Sb
All elements listed in formula:Ag, As, Cu, S, Sb
Common Impurities:Fe

Relationship of Polybasite-Tac to other Species

Related Minerals - Strunz Grouping):
2/E.05-10Billingsleyite
Ag
 
7
AsS
 
6
2/E.05-20Pearceite
(Ag,Cu)
 
16
(As,Sb)
 
2
S
 
11
2/E.05-40Pearceite-T2ac
(Ag,Cu)
 
16
(As,Sb)
 
2
S
 
11
2/E.05-50Polybasite
(Ag,Cu)
 
16
(Sb,As)
 
2
S
 
11
Related Minerals - Hey's Index Grouping:
5.2.1Smithite
AgAsS
 
2
5.2.2Trechmannite
AgAsS
 
2
5.2.3Proustite
Ag
 
3
AsS
 
3
5.2.4Xanthoconite
Ag
 
3
AsS
 
3
5.2.5Pearceite
(Ag,Cu)
 
16
(As,Sb)
 
2
S
 
11
5.2.6Pearceite-T2ac
(Ag,Cu)
 
16
(As,Sb)
 
2
S
 
11
5.2.7Argentotennantite
(Ag,Cu)
 
10
(Zn,Fe)
 
2
(As,Sb)
 
4
S
 
13
5.2.8Miargyrite
AgSbS
 
2
5.2.9Pyrargyrite
Ag
 
3
SbS
 
3
5.2.10Pyrostilpnite
Ag
 
3
SbS
 
3
5.2.11Stephanite
Ag
 
5
SbS
 
4
5.2.12Polybasite
(Ag,Cu)
 
16
(Sb,As)
 
2
S
 
11
5.2.13Billingsleyite
Ag
 
7
AsS
 
6
5.2.15Freibergite
(Ag,Cu,Fe)
 
12
(Sb,As)
 
4
S
 
13
5.2.16Aramayoite
Ag(Sb,Bi)S
 
2
5.2.17Matildite
AgBiS
 
2
5.2.18Schapbachite
AgBiS
 
2
5.2.19Pavonite
(Ag,Cu)(Bi,Pb)
 
3
S
 
5
5.2.20Arcubisite
Ag
 
6
CuBiS
 
4
5.2.21Bohdanowiczite
AgBiSe
 
2
5.2.22Selenostephanite
Ag
 
5
Sb(Se,S)
 
4
5.2.23Benleonardite
Ag
 
8
(Sb,As)Te
 
2
S
 
3
5.2.24Volynskite
AgBiTe
 
2

Other Names for Polybasite-Tac

Synonyms:
Antimonpearceite
German names:
Antimonpearceit
Russian names:
Антимонпирсеит
Spanish names:
Antimonpearceita

Other Information

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

References for Polybasite-Tac

Reference List:American Mineralogist: 48: 565-572.

American Mineralogist: 50: 1507.

M. Evain, L. Bindi and S. Menchetti (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 Cryst. B62, 768-774.

LUCA BINDI, MICHEL EVAIN, PAUL G. SPRY, AND SILVIO MENCHETT (2007) The pearceite-polybasite group of minerals: Crystal chemistry and new nomenclature rules. American Mineralogist, Volume 92, pages 918-925

Bindi et al., Acta Cryst. B62,212-219(2006),"Temperature dependence of the silver distribution in the crystal structure of natural pearceite"

Evain, et al., Acta Cryst. B62,447-456(2006), "Structural complexity in minerals: twinning, polytypism and disorder in the crystal structure of polybasite"

Bindi, Luca, Michel Evain, Paul G. Spry, and Silvio Menchett (2007) The pearceite-polybasite group of minerals: Crystal chemistry and new nomenclature rules. American Mineralogist, Volume 92, pages 918-925.

Internet Links for Polybasite-Tac

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    Localities for Polybasite-Tac

    Hide Locality List
    The 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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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • St Blasien
          • Urberg
    		Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Wolfach
          • Oberwolfach
            • Frohnbach valley
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
            • Rankach valley
    		Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German); KOLITSCH, U., GRÖBNER, J. & BAYERL, R. (1995): Die Mineralien der Silber-Antimon-Vererzungen der Grube Clara im Zeitraum 1993 bis 1995. - Erzgräber 9 (2), 61-77. ; Wendel, G. (2006): Antimonpearceite aus der Grube Clara, Oberwolfach. LAPIS 31 (2), 36-37
    • Rhineland-Palatinate
      • Siegerland
        • Niederfischbach
    		Schnorrer-Köhler, G. (1991): Mineralogische Notizen V, Der Aufschluss, Vol. 42, 155-171
    Italy
     
    • Sardinia
      • Cagliari Province
        • Burcei
    		Stara, P., Rizzo, R., Brizzi G., (1993): Sarrabus Miniere e Minerali. Edito a cura dell'EMSA e "varie associazioni mineralogiche", 208 pp.
        • San Vito
    		AA. VV., 1996. Collezionare minerali. Hobby & Work.
    Mexico
     
    • Guanajuato
    		Amer.Min.(1963) 48, 565-572
    Amer.Min.(1963) 48, 565-572
      • Mun. de Arizpe
        • Arizpe
    		Amer.Min.(1963) 48, 565-572
    Slovakia
     
    • Prešov Region
      • Northern Slanské Mts
    		Duda et. all.,1981:Minerály severnej časti Slanských vrchov. Min.Slovca,Monografia 2,Bratislava, 98 p
    Spain
     
    • Castile and Leon
      • Salamanca
    		Revista de minerales, 2000 (Mars), 260-263.
    UK
     
    • England
      • Cornwall
        • Wadebridge District
          • Area West of Wadebridge
            • St Minver
    		No reference listed
    USA
     
    • Colorado
      • Clear Creek Co.
    		Minerals of Colorado (1997) Eckels, E. B.
    • Missouri
      • Madison Co.
        • Fredericktown District
    		R&M 73:2 pp 98-117
    • Washington
      • Chelan Co.
        • Wenatchee 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
    Google
     
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