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Structural role of tellurium in the minerals of the pearceite-polybasite group

Published online by Cambridge University Press:  05 July 2018

L. Bindi ,
P. Voudouris  and
P. G. Spry
L. Bindi*
Affiliation:
Dipartimento di Scienze della Terra, Università degli Studi di Firenze, Via La Pira, 4, I-50121, Florence, Italy
P. Voudouris
Affiliation:
Department of Mineralogy-Petrology, Faculty of Geology & Geoenvironment, National and Kapodistrian University of Athens, Panepistimiopolis, G-15784, Athens, Greece
P. G. Spry
Affiliation:
Department of Geological and Atmospheric Sciences, 253 Science I, Iowa State University, Ames, Iowa 50011-3212, USA
*
* E-mail: [email protected]
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Abstract

The crystal structure of a Te-rich polybasite has been refined by means of X-ray diffraction data collected at room temperature (space group Pm1; R = 0.0505 for 964 observed reflections and 94 parameters; refined formula Ag14.46Cu1.54Sb1.58As0.42S9.67Te1.33). The structure comprises stacking of [(Ag, Cu)6(Sb, As)2(S, Te)7]2–A and [Ag9Cu(S, Te)2(S, Te)2]2+B layer modules in which Sb forms isolated SbS3 pyramids, as occurs typically in sulfosalts, Cu links two S atoms in a linear coordination and Ag occupies sites with coordination ranging from quasi linear to almost tetrahedral. The silver d10 ions are found in the B layer module along two-dimensional diffusion paths and their electron densities evidenced by means of a combination of a Gram-Charlier development of the atomic displacement factors and a split model. The Te-for-S substitution occurs at the same structural sites that Se substitutes for S in selenopolybasite and the Te occupancy at one of these sites is 0.49, thus suggesting the possibility that 'telluropolybasite' could be found in nature.

Keywords

polybasitetelluriumcrystal structureionic conductivitystructural disorderKallianou mineralizationGreece
Type
Research Article
Information
Mineralogical Magazine , Volume 77 , Issue 4 , June 2013 , pp. 419 - 428
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2013

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References

Alexouli-Livaditi, K. (1978) Mixed sulphide ores of Kallianou area, southern Evia. PhD thesis, National Technical University of Athens (in Greek).Google Scholar
Alfieris, D., Voudouris, P. and Spry, P.G. (2013) Shallow submarine epithermal Pb-Zn-Cu-Au-Ag-Te mineralization on western Milos Island, Aegean Volcanic Arc, Greece: Mineralogical, geological and geochemical constraints. Ore Geology Reviews, 53, 159–180. doi: 10.1016/j.oregeorev.2013.01.007CrossRefGoogle Scholar
Barrett, R.A. and Zolensky, M.E. (1986) Compositionalcrystallographic relations for polybasite. Geological Society of America Meeting Abstracts Program, 18, 535.Google Scholar
Becker, P.J. and Coppens, P. (1974) Extinction within the limit of validity of the Darwin transfer equations. I. General formalism for primary and secondary extinction and their applications to spherical crystals. Acta Crystallographica, A30, 129–147.CrossRefGoogle Scholar
Bindi, L., Evain, M. and Menchetti, S. (2006a) Temperature dependence of the silver distribution in the crystal structure of natural pearceite, (Ag,Cu)16(As,Sb)2S11. Acta Crystallographica, B62, 212–219.CrossRefGoogle Scholar
Bindi, L., Evain, M., Pradel, A., Albert, S., Ribes, M. and Menchetti, S. (2006b) Fast ionic conduction character and ionic phase-transitions in disordered crystals: The complex case of the minerals of the pearceite-polybasite group. Physics and Chemistry of Minerals, 33, 677–690.CrossRefGoogle Scholar
Bindi, L., Evain, M., Spry, P.G. and Menchetti, S. (2007a) The pearceite-polybasite group of minerals: Crystal chemistry and new nomenclature rules. American Mineralogist, 92, 918–925.CrossRefGoogle Scholar
Bindi, L., Evain, M. and Menchetti, S. (2007b) Complex twinning, polytypism and disorder phenomena in the crystal structures of antimonpearceite and arsenpolybasite. The Canadian Mineralogist, 45, 321–333.CrossRefGoogle Scholar
Bindi, L., Evain, M., Spry, P.G., Tait, K.T. and Menchetti, S. (2007c) Structural role of copper in the minerals of the pearceite-polybasite group: The case of the new minerals cupropearceite and cupropolybasite. Mineralogical Magazine, 71, 641–650.CrossRefGoogle Scholar
Bindi, L., Evain, M. and Menchetti, S. (2007d) Selenopolybasite, [(Ag,Cu)6(Sb,As)2(S,Se)7] [Ag9Cu(S,Se)2Se2], a new member of the pearceitepolybasite group from the De Lamar Mine, Owyhee county, Idaho, USA. The Canadian Mineralogist, 45, 1525–1528.CrossRefGoogle Scholar
Bindi, L. and Menchetti, S. (2009) Adding further complexity to the polybasite structure: The role of silver in the B layer of the M2a2b2c polytype. American Mineralogist, 94, 151–155.CrossRefGoogle Scholar
Bonsall, T.A., Spry, P.G., Voudouris, P., Seymour, K.St., Tombros, S. and Melfos, V. (2011) The geochemistry of carbonate-replacement Pb-Zn-Ag mineralization in the Lavrion district, Attica, Greece: Fluid inclusion, stable isotope, and rare earth element studies. Economic Geology, 106, 619–651.CrossRefGoogle Scholar
Boucher, F., Evain, M. and Brec, R. (1993) Distribution and ionic diffusion path of silver in g-Ag8GeTe6: A temperature dependent anharmonic single crystal structure study. Journal of Solid State Chemistry, 107, 332–346.CrossRefGoogle Scholar
Evain, M., Bindi, L. and Menchetti, S. (2006a) Structural complexity in minerals: twinning, polytypism and disorder in the crystal structure of polybasi t e , (Ag,Cu) 1 6(Sb,As)2S1 1. Acta Crystallographica, B62, 447–456.CrossRefGoogle Scholar
Evain, M., Bindi, L. and Menchetti, S. (2006b) Structure and phase transition in the Se-rich variety of antimonpearceite,(Ag14.67Cu1.20Bi0.01Pb0.01 Zn0.01Fe0.03)15.93(Sb1.86As0.19)2.05 (S8.47Se2.55)11.02 . Acta Crystallographica, B62, 768–774.CrossRefGoogle Scholar
Harris, D.C., Nuffield, E.W. and Frohberg, M.H. (1965) Studies of mineral sulphosalts: XIX-Selenian polybasite. The Canadian Mineralogist, 8, 172–184.Google Scholar
Jelen, S., Kovalenker, V.A. and Gaber, M. (2007) Paragenetic assemblages of gold and silver minerals in ores of the Banska Stiavnica and Hodrusa deposits (The eastern Carpathians, Slovakia): Mineralogy, variation of chemical composition, and formation conditions. Pp. 178–183. in: Rol mineralogii v poznanii protsessov rudoobrazovani y a (Contribution of Mineralogy to Knowledge on Ore Formation). IGEM RAN, Moscow.Google Scholar
Johnson, C.K. and Levy, H.A. (1974) International Tables for X-ray Crystallography Vol. IV (J.A. Ibers and W.C. Hamilton, editors). Pp. 311–336. Kynoch Press, Birmingham, UK.Google Scholar
Katsikatsos, G. (1978) The mineral wealth of the area of the Euboea prefecture. Athens: Institute of Geological and Mining Research International Report, 7, 29.Google Scholar
Kovalenker, V.A., Kiseleva, G.D., Krylova, T.L. and Andreeva, O.V. (2011) Mineralogy and ore formation conditions of the Bugdaya Au-bearing W-Mo porphyry deposit, eastern Transbaikal region, Russia. Geology of Ore Deposits, 53, 93–125.CrossRefGoogle Scholar
Kuhs, W.F. (1984) Site-symmetry restrictions on thermal-motion-tensor coefficients up to rank 8. Acta Crystallographica, A40, 133–137.CrossRefGoogle Scholar
Neubauer, F. (2005) Structural control of mineralization in metamorphic core complexes. Pp. 561–564. in: Mineral Deposit Research: Meeting the Global Challenge (J. Mao and F.P. Bierlein, editors). Springer, Berlin-Heidelberg.CrossRefGoogle Scholar
Oxford Diffraction (2006) CrysAlis RED (Version 1.171.31.2) and ABSPACK in CrysAlis RED. Oxford Diffraction Ltd, Abingdon, Oxfordshire, UK.Google Scholar
Petříček, V., Dušek, M. and Palatinus, L. (2006). JANA2006, a crystallographic computing system. Institute of Physics, Academy of Sciences of the Czech Republic, Prague.Google Scholar
Ring, U. and Glodny, J. (2010) No need for lithospheric extension for exhuming U(HP) rocks by normal faulting. Journal of the Geological Society of London, 167, 1–4.CrossRefGoogle Scholar
Ring, U., Glodny, J., Will, T. and Thomson, S. (2007) An Oligocene extrusion wedge of blueschist facies nappes on Evia, Aegean Sea, Greece: implications for the early exhumation of high-pressure rocks. Journal of the Geological Society of London, 164, 637–652.CrossRefGoogle Scholar
Shannon, R.D. (1976) Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallographica, A32, 751–767.CrossRefGoogle Scholar
Skarpelis, N. (2002) Geodynamics and evolution of the Miocene mineralization in the Cycladic-Pelagonian belt, Hellenides. Bulletin of the Geological Society of Greece, 34, 2191–2206.CrossRefGoogle Scholar
Spry, P.G., Tombros, S.F., Seymour, K.St., Williams- Jones, A.E. and Zouzias, D.P. (2006) Geology, mineralogy and geochemistry of granite-hosted gold telluride mineralization at Panormos Bay, Tinos Island, Greece. Geological Society of America, Akron, Ohio – Abstracts, 38, 55.Google Scholar
Tombros, S., Seymour, K.St. and Spry, P.G. (2004) Description and conditions of formation of new unnamed Ag-Cu and Ag-Cu-Au sulfotellurides in epithermal polymetallic Ag-Au-Te mineralization, Tinos Island, Hellas. Neues Jahrbuch für Mineralogie, Abhandlungen, 179, 295–310.CrossRefGoogle Scholar
Tombros, S.F., Seymour, K.St., Williams-Jones, A.E. and Spry, P.G. (2007) The genesis of epithermal Au- Ag-Te mineralization, Panormos Bay, Tinos Island, Cyclades, Greece. Economic Geology, 102, 1269–1294.CrossRefGoogle Scholar
Vavelidis, M. (1997) Au-bearing quartz veins and placer gold on Sifnos Island, Aegean Sea, Greece. Pp. 335–338. in: Mineral Deposits: Research and Exploration where do they Meet? (H. Papunen, editor). Balkema, Rotterdam, The Netherlands.Google Scholar
Vavelidis, M. and Michailidis, M. (1990) Gold composition in the Fe-Pb-Cu-(Ag-Zn) hydrothermal quartz veins of Kallianou area, Southern Euboea (Greece). Bulletin of the Geological Society of Greece, 22, 87–96.Google Scholar
Voudouris, P. and Spry, P.G. (2008) A new occurrence of cervelleite-like phases and Te-polybasite from gold-bearing veins in metamorphic rocks of the Cycladic Blueschist Unit, Greece. 33rd International Geological Congress, MRD-09 Au-Ag tellurideselenide deposits, CD-ROM, Abstract.Google Scholar
Voudouris, P.C., Spry, P.G., Sakellaris, G.A. and Mavrogonatos, C. (2011) A cervelleite-like mineral and other Ag-Cu-Te-S minerals [Ag2CuTeS and (Ag,Cu)2TeS] in gold-bearing veins in metamorphic rocks of the Cycladic Blueschist Unit, Kallianou, Evia Island, Greece. Mineralogy and Petrology, 101, 169–183.CrossRefGoogle Scholar
Warmada, I.W., Lehmann, B. and Simandjuntak, M. (2003) Polymetallic sulfides and sulfosalts of the Pongkor epithermal gold-silver deposit, west Java, Indonesia. The Canadian Mineralogist, 41, 185–200.CrossRefGoogle Scholar