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Polybasite-Tac

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Big Photo

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

Show Polybasite-Tac Photos (21)



System:MonoclinicColour:Black
Hardness:3
A polytype of Polybasite

Previously known as "antimonpearceite", which was originally described from Sonora, Mexico. Was renamed during a nomenclature change in 2006 (Bindi et al., 2007).

A Se-bearing variety has been described by Marquez-Zavalia et al. (2008).

Classification of Polybasite-Tac

IMA status:Redefined Approved 2006
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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Occurrences of Polybasite-Tac

Geological Setting:Epithermal precious metal deposits

Physical Properties of Polybasite-Tac

Lustre:Sub-Metallic
Diaphaneity (Transparency):Opaque
Colour:Black
Streak:Black
Hardness (Mohs):3
Tenacity:Brittle
Density (measured):6.33 - 6.35 g/cm3
Density (calculated):6.40 g/cm3

Crystallography of Polybasite-Tac

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m {B1 1 2/m} {C2/m} {C1 2/m 1}
Space Group Setting:C2/m
Morphology:Thin tabular pseudohexagonal
Twinning:On {110}

Relationship of Polybasite-Tac to other Species

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)
 
6
(As,Sb)
 
2
S
 
7
][Ag
 
9
CuS
 
4
]
5.2.6Pearceite-T2ac
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)
 
6
(Sb,As)
 
2
S
 
7
][Ag
 
9
CuS
 
4
]
5.2.13Billingsleyite
Ag
 
7
AsS
 
6
5.2.15Freibergite
(Ag
 
4+2x
Cu
 
2-2x
)[(Cu, Ag)
 
4
(Fe, Zn)
 
2
]Sb
 
4
S
 
12
S
 
1-x
 (0 < x < 1)
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
Other Languages:
German:Antimonpearceit
Russian:Антимонпирсеит
Spanish: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.

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, 92, 918-925.

Marquez-Zavalia, M.F. et al. (2008): Mineral. Petrol. 94, 145-150.

Internet Links for Polybasite-Tac

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    • Localities for Polybasite-Tac

    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.
    Argentina
     
    • Santa Cruz
      • Macizo del Deseado
    		Marquez-Zavalia, M.F. et al. (2008): Mineral. Petrol. 94, 145-150.; FERNANDEZ, Raúl R. et al. Gold and silver deposits related to Jurassic Patagonian volcanism: review and perspectives for exploration. Rev. Asoc. Geol. Argent. [online]. 2008, vol.63, n.4, pp. 665-681.
    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
    Indonesia
     
    • Jawa Island (Java Island)
      • Jawa Barat Province (West Java Province)
        • Bogor District
    		Syafrizal; Imai, A.; Motomura, Y.; Watanabe, K. (2005): Characteristics of gold mineralization at the Ciurug vein, Pongkor gold-silver deposit, West Java, Indonesia. Resource Geology 55, 225-238.
    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
      • Prešov Co.
    		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
     
    • Alaska
      • Juneau Borough
        • Admiralty District
    		Taylor, C.D., and Johnson, C.A., editors, 2010, Geology, geochemistry, and genesis of the Greens Creek massive sulfide deposit, Admiralty Island, southeastern Alaska: U.S. Geological Survey Professional Paper 1763, 429 p., 7 plates on CD.
    • 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
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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