Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-23T23:56:14.007Z Has data issue: false hasContentIssue false
  • English
  • Français

Lead-antimony sulfosalts from Tuscany (Italy). XV. (Tl-Ag)-bearing rouxelite from Monte Arsiccio mine: occurrence and crystal chemistry

Published online by Cambridge University Press:  05 July 2018

C. Biagioni ,
Y. Moëlo  and
P. Orlandi
C. Biagioni*
Affiliation:
Dipartimento di Scienze della Terra, Universitá di Pisa, Via S. Maria 53, I-56126 Pisa, Italy
Y. Moëlo
Affiliation:
Institut des Matériaux Jean Rouxel, UMR 6502, CNRS, Université de Nantes, 2, rue de la Houssinière, 44322 Nantes Cedex 3, France
P. Orlandi
Affiliation:
Dipartimento di Scienze della Terra, Universitá di Pisa, Via S. Maria 53, I-56126 Pisa, Italy Istituto di Geoscienze e Georisorse, CNR, Via Moruzzi 1, I-56124 Pisa, Italy
*
E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

A third world occurrence of rouxelite, ideally Cu2HgPb22Sb28S64(O,S)2, has been identified from the baryte-pyrite-Fe oxides ore of Monte Arsiccio mine, near Sant’Anna di Stazzema (Apuan Alps, Tuscany, Italy). Rouxelite occurs as mm-sized acicular crystals, black in colour, with bluish-violet iridescence, in vugs of carbonate + baryte + quartz veins embedded in dolostones from the Sant’Olga tunnel. It is associated with Tl-bearing chovanite, sphalerite and valentinite. Its X-ray powder diffraction pattern gives unit-cell parameters a = 43.10(2), b = 4.060(2), c = 37.88(2) Å, β = 117.33(2)°, V = 5889(5) Å3. Electron-microprobe data reveal a complex chemistry, with additional minor elements (wt.%): Tl (0.6–1.7), Ag (0.4–0.6), As (0.2–0.6) and Bi (≤0.05). This indicates a widespread substitution of Hg by Ag, according to Hg + Pb = Ag + Sb and incorporation of Tl, with some Ag, according to 2Pb = Sb + (Tl, Ag). The occurrence of mixed (Hg, Ag) and (Hg, Cu) sites in natural sulfides and sulfosalts is briefly reviewed. The Tl-content of the samples studied is a characteristic fingerprint agreeing with the Tl-rich nature of the mineral assemblage from Monte Arsiccio. Rouxelite therefore constitutes a new example of a Tl-bearing sulfosalt.

Keywords

rouxelitemercurysilverthalliumsulfosaltMonte Arsiccio mineApuan AlpsTuscanyItaly
Type
Research Article
Information
Mineralogical Magazine , Volume 78 , Issue 3 , June 2014 , pp. 651 - 661
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2014

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Biagioni, C., Bonaccorsi, E., Pasero, M., Moëlo, Y., Ciriotti, M.E., Bersani, D., Callegari, A.M. and Boiocchi, M. (2011) Ambrinoite, (K,NH4)2(As,Sb)8S13·H2O, a new mineral from the Upper Susa Valley, Piedmont, Italy: The first natural (K,NH4)-hydrated sulfosalt. American Mineralogist, 96, 878–887.CrossRefGoogle Scholar
Biagioni, C., Bonaccorsi, E., Moëlo, Y. and Orlandi, P. (2013a) Mercury-arsenic sulfosalts from the Apuan Alps (Tuscany, Italy). III. Aktashite, Cu6Hg3As4S12, and laffittite, AgHgAsS3, from the Monte Arsiccio mine: occurrence and crystal structure. Periodico di Mineralogia, 83, 1–18.Google Scholar
Biagioni, C., D’Orazio, M., Vezzoni, S., Dini, A. and Orlandi, P. (2013b) Mobilization of Tl-Hg-As-Sb-(Ag,Cu)-Pb sulfosalt melts during low-grade metamorphism in the Alpi Apuane (Tuscany, Italy). Geology, 41, 747–751.CrossRefGoogle Scholar
Biagioni, C., Moëlo, Y., Orlandi, P., Stanley, C.J. and Evain, M. (2013c) Meerschautite, IMA 2013-061. CNMNC Newsletter No. 17, October 2013, page 3004; Mineralogical Magazine, 77, 2997–3005.Google Scholar
Biagioni, C., Orlandi, P. and Moëlo, Y. (2013d) Carducciite, IMA 2013-006. CNMNC Newsletter No. 16, August 2013, page 2702; Mineralogical Magazine, 77, 2695–2709.Google Scholar
Biagioni, C., Bonaccorsi, E., Moëlo, Y., Orlandi, P., Bindi, L., D’Orazio, M. and Vezzoni, S. (2014) Mercury-arsenic sulfosalts from the Apuan Alps (Tuscany, Italy). II. Arsiccioite, AgHg2TlAs2S6, a new mineral from the Monte Arsiccio mine: occurrence, crystal structure and crystal chemistry of the routhierite isotypic series. Mineralogical Magazine, 78, 101–117.CrossRefGoogle Scholar
Bindi, L., Downs, R.T., Spry, P.G., Pinch, W.W. and Menchetti, S. (2012) A chemical and structural reexamination of fettelite samples from the type locality, Odenwald, southwest Germany. Mineralogical Magazine, 76, 551–566.CrossRefGoogle Scholar
Chen, T.T. and Szymański, J.T. (1981) The structure and chemistry of galkhaite, a mercury sulfosalt containing Cs and Tl. The Canadian Mineralogist, 19, 571–581.Google Scholar
Chen, T.T. and Szymański, J.T. (1982) A comparison of galkhaite from Nevada and from the type locality, Khaydarkan, Kirgizia, U.S.S.R.. The Canadian Mineralogist, 20, 575–577.Google Scholar
Costagliola, P., Benvenuti, M., Tanelli, G., Cortecci, G. and Lattanzi, P. (1990) The barite-pyrite-iron oxides deposit of Monte Arsiccio (Apuane Alps). Geological setting, mineralogy, fluid inclusions, stable isotopes and genesis. Bollettino della Società Geologica Italiana, 109, 267–277.Google Scholar
Hatert, F. and Burke, E.A.J. (2008) The IMA-CNMNC dominant-constituent rule revisited and extended. The Canadian Mineralogist, 46, 717–728.CrossRefGoogle Scholar
Laugier, J. and Bochu, B. (1999) CELREF: Cell parameters refinement program from powder diffraction diagram. Laboratoire des Matériaux et du Génie Physique, Ecole Nationale Supérieure de Physique de Grenoble (INPG), Grenoble, France.Google Scholar
Makovicky, E., Balić-Žunić, T. and Topa, D. (2001) The crystal structure of neyite, Ag2Cu6Pb25Bi26S68. The Canadian Mineralogist, 39, 1365–1376.CrossRefGoogle Scholar
Moëlo, Y., Makovicky, E., Mozgova, N.N., Jambor, J.L., Cook, N., Pring, A., Paar, W.H., Nickel, E.H., Graeser, S., Karup-Møller, S., Balić-Žunić, T., Mumme, W.G., Vurro, F., Topa, D., Bindi, L., Bente, K. and Shimizu, M. (2008) Sulfosalt systematics: a review. Report of the sulfosalt subcommittee of the IMA Commission on Ore Mineralogy. European Journal of Mineralogy, 20, 7–46.CrossRefGoogle Scholar
Moëlo, Y., Orlandi, P., Guillot-Deudon, C., Biagioni, C., Paar, W. and Evain, M. (2011) Lead-antimony sulfosalts from Tuscany (Italy). XI. The new mineral species parasterryite, Ag4Pb20(Sb14.5As9.5)S24S58, and associated sterryite, Cu(Ag,Cu)3Pb19 (Sb,As)S22(As–As)S56, from the Pollone mine, Tuscany, Italy. The Canadian Mineralogist, 49, 623–638.CrossRefGoogle Scholar
Mumme, W.G. and Nickel, E.H. (1987) Crystal structure and crystal chemistry of perroudite: A mineral from Coppin Pool, Western Australia. American Mineralogist, 72, 1257–1262.Google Scholar
Orlandi, P., Moëlo, Y., Meerschaut, A. and Palvadeau, P. (1999) Lead-antimony sulfosalts from Tuscany (Italy). I. Scainiite, Pb14Sb30S54O5, the first Pb-Sb oxy-sulfosalt, from Buca della Vena mine. European Journal of Mineralogy, 11, 949–954.CrossRefGoogle Scholar
Orlandi, P., Moëlo, Y., Meerschaut, A., Palvadeau, P. and Léone, P. (2005) Lead-antimony sulfosalts from Tuscany (Italy). VIII. Rouxelite, Cu2HgPb22 Sb28S64(O,S)2, a new sulfosalt from Buca della Vena mine, Apuan Alps: definition and crystal structure. The Canadian Mineralogist, 43, 919–933.CrossRefGoogle Scholar
Orlandi, P., Biagioni, C., Bonaccorsi, E., Moëlo, Y. and Paar, W. (2012) Lead-antimony sulfosalts from Tuscany (Italy). XII. Boscardinite, TlPb4(Sb7As2)S9S18, a new mineral species from the Monte Arsiccio mine: occurrence and crystal structure. The Canadian Mineralogist, 50, 235–251.CrossRefGoogle Scholar
Orlandi, P., Biagioni, C., Moëlo, Y., Bonaccorsi, E. and Paar, W. (2013) Lead-antimony sulfosalts from Tuscany (Italy). XIII. Protochabourné ite, ∼Tl2Pb(Sb9-8As1-2)S10S17, from the Monte Arsiccio mine: occurrence, crystal structure and relationship with chabournéite. The Canadian Mineralogist, 51, 475–494.CrossRefGoogle Scholar
Pandeli, E., Bagnoli, P. and Negri, M. (2004) The Fornovolasco schists of the Apuan Alps (Northern Tuscany, Italy): a new hypothesis for their stratigraphic setting. Bollettino della Società Geologica Italiana, 123, 53–66.Google Scholar
Pekov, I.V. and Bryzgalov, I.A. (2006) New data on galkhaite. New Data on Minerals, 41, 26–32.Google Scholar
Topa, D., Sejkora, J., Makovicky, E., Pršek, J., Ozdín, D., Putz, H., Dittrich, H. and Karup-Møller, S. (2012) Chovanite, Pb15-2xSb14+2xS36Ox (x∼0.2), a new sulphosalt species from the Low Tatra Mountains, Western Carpathians, Slovakia. European Journal of Mineralogy, 24, 727–740.CrossRefGoogle Scholar