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Ferrostalderite, CuFe2TlAs2S6, a new mineral from Lengenbach, Switzerland: occurrence, crystal structure, and emphasis on the role of iron in sulfosalts

  • Cristian Biagioni (a1), Luca Bindi (a2), Fabrizio Nestola (a3), Ralph Cannon (a4), Philippe Roth (a5) and Thomas Raber (a6)...


The new mineral species ferrostalderite, CuFe2TlAs2S6, was discovered in the Lengenbach quarry, Binn Valley, Wallis, Switzerland. It occurs as minute, metallic, black, equant to prismatic crystals, up to 50 mu;m, associated with dolomite, realgar, baumhauerite (?) and pyrite. Minimum and maximum reflectance data for COM wavelengths in air are [λ (nm): R (%)]: 471.1: 24.2/25.4; 548.3: 23.7/24.7; 586.6: 22.9/23.8; 652.3: 21.0/22.0. Electron microprobe analyses give (wt.%): Cu 6.24(25), Ag 4.18(9), Fe 9.95(83), Zn 4.46(91), Hg 1.22(26), Tl 26.86(62), As 19.05(18), Sb 0.63(6),S 25.39(47), total 97.98(72). On the basis of 12 atoms per formula unit, the chemical formula of ferrostalderite is Cu0.75(2)Ag0.30(1)Fe1.36(10) Zn0.52(11) Hg0.05(1) Tl1.00(1)[As1.94(4)Sb0.04(1)]∑1.98(4)S6.04(4). The new mineral is tetragonal, space group I4̄2 m, with a = 9.8786(5), c = 10.8489(8) Å, V = 1058.71(11) Å3, Z = 4. The main diffraction lines of the calculated powder diagram are [d (in Å), intensity, hkl]: 4.092, 70, 211; 3.493, 23, 220; 3.396, 35, 103; 3.124, 17, 310; 2.937, 100, 222; 2.656, 19, 321; 2.470, 19, 400; 2.435, 33, 303. The crystal structure of ferrostalderite has been refined by Xray single-crystal data to a final R1 = 0.050, on the basis of 1169 reflections with F0 > 4σ(F0). It shows a three dimensional framework of (Cu,Fe)-centred tetrahedra (1M1 + 2 M2), with channels parallel to [001] hosting disymmetric TlS6 and (As,Sb)S3 polyhedra. Ferrostalderite is derived from its isotype stalderite M1CuM2Zn2TlAs2S6 through the homovalent substitution M2Zn2+ → M2Fe2+. The ideal crystal-chemical formula of ferrostalderite is M1CuM2Fe2TlAs2S6.


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Andreasen, J.W., Makovicky, E., Lebech, B. and Karup-Møller, S. (2008) The role of iron in tetrahedrite and tennantite determined by Rietveld refinement of neutron powder diffraction data. Physics and Chemistry of Minerals, 35, 447454
Balic-Zunic, T., Makovicky, E., Karanovic, L., Poleti, D. and Graeser, S. (2006) The crystal structure of gabrielite, Tl2AgCu2As3S7, a new species of thallium sulfosalt from Lengenbach, Switzerland. The Canadian Mineralogist, 44, 141158.
Biagioni, C., D'Orazio, M., Vezzoni, S., Dini, A. and Orlandi, P. (2013) Mobilization of Tl-Hg-As-Sb-(Ag, Cu)-Pb sulfosalt melts during low-grade metamorph-ism in the Alpi Apuane (Tuscany, Italy). Geology, 41, 747–75.
Biagioni, C., Bonaccorsi, E., Moëlo, Y and Orlandi, P. (2014a) Mercury-arsenic sulfo salts from Apuan Alps (Tuscany, Italy). I. Routhierite, (Cu0 8Ag0 2)Hg2Tl (As1.4Sb0.6)Σ=2S6, from Monte Arsiccio mine: occur¬rence and crystal structure. European Journal of Mineralogy, 26, 163170.
Biagioni, C., Bonaccorsi, E., Moëlo, Y., Orlandi, P., Bindi, L., D'Orazio, M. and Vezzoni, S. (2014b) 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, 101117
Bindi, L. (2008) Routhierite, Tl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6 . Acta Crystallographica, C64, i95i96.
Bindi, L. and Menchetti, S. (2005) Garavellite, FeSbBiS4, from the Caspari mine, North Rhine-Westphalia, Germany: composition, physical properties and deter¬mination of the crystal structure. Mineralogy and Petrology, 85, 131139.
Bindi, L., Downs, R.T., Spry, P.G., Pinch, W.W. and Menchetti, S. (2012) A chemical and structural re-examination of fettelite samples from the type locality, Odenwald, southwest Germany. Mineralogical Magazine, 76,551566
Bindi, L., Biagioni, C., Nestola, F., Cannon, R., Roth, P. and Raber, T (2015a) Ferrostalderite, IMA 2014-090. CNMNC Newsletter No. 24, April 2015, page 248. Mineralogical Magazine, 79, 247251
Bindi, L., Biagioni, C., Raber, T., Roth, P. and Nestola, F. (2015b) Ralphcannonite, AgZn2TlAs2S6, a new mineral of the routhierite isotypic series from Lengenbach, Binn Valley, Switzerland. Mineralogical Magazine, 79, 10891098.
Brese, N.E. and O'Keeffe, M. (1991) Bond-valence parameters for solids. Acta Crystallographica, B47, 192197.
Brown, K.L. and Dickson, F.W. (1976) The crystal structure of synthetic christite, HgTlAsS3 . Zeitschrift für Kristallographie, 144,367376
Buerger, M.J. and Hahn, T (1955) The crystal structure of berthierite, FeSb2S4 . American Mineralogist, 40, 226238.
Graeser, S., Schwander, H., Wulf, R. and Edenharter, A. (1995) Stalderite, TlCu(Zn,Fe,Hg)2As2S6 - a new mineral related to routhierite: description and crystal structure. Schweizerische Mineralogische und Petrographische Mitteilungen, 75,337345
Graeser, S., Cannon, R., Drechsler, E., Raber, T and Roth, P. (2008) Faszination Lengenbach Abbau-Forschung-Mineralien 1958-2008. Kristallographik Verlag, Achberg, Germany.
Hofmann, B.A. andKnill, M.D. (1996) Geochemistry and genesis of the Lengenbach Pb-Zn-As-Tl-Ba mineral¬ization, Binn Valley, Switzerland. Mineralium Deposita, 31, 319339.
Johan, Z. and Mantienne, J. (2000) Thallium-rich mineralization at Jas Roux, Hautes-Alpes, France: a complex epithermal, sediment-hosted, ore-forming system. Journal of the Czech Geological Society, 45,6377
Johan, Z., Mantienne, J. and Picot, P. (1974) La routhiérite, TlHgAsS3, et la laffittite, AgHgAsS3, deux nouvelles especes minerales. Bulletin de la Société française de Minéralogie et de Cristallographie, 97, 4853.
Kraus, W. and Nolze, G. (1996) PowderCell — a program for the representation and manipulation of crystal structures and calculation of the resulting X-ray powder patterns. Journal of Applied Crystallography, 29, 301303.
Lemoine, P.P., Carré, D. and Robert, F. (1991) Structure du sulfure de fer et d'antimoine, FeSb2S4 (berthierite). Acta Crystallographica, C47, 938940.
Léone, P., Le Leuch, L.M., Palvadeau, P., Molinie, P. and Moëlo, Y (2003) Single crystal structure and magnetic properties of two iron or manganese-lead-antimony sulfides: MPb4Sb6S14 (M:Fe, Mn). Solid State Sciences, 5, 771776.
Li, J. (1984) Franckeite syntheses and heating experi-ments. Neues Jahrbuch für Mineralogie, Abhandlungen, 150,4550
Lukaszewicz, K., Pietraszko, A., Stepien-Damm, J., Kajokas, A., Grigas, J. and Drulis, H. (2001) Crystal structure, Mössbauer spectra, thermal expansion, and phase transition of berthierite, FeSb2S4 . Journal of Solid State Chemistry, 162,7983
Makovicky, E., Forcher, K., Lottermoser, W. and Amthauer, G. (1990) The role of Fe2+ and Fe3+ in synthetic Fe-substituted tetrahedrite. Mineralogy and Petrology, 43, 7381.
Makovicky, E., Petricek, V., Dušek, M. and Topa, D. (2008) Crystal structure of a synthetic tin-selenium representative of the cylindrite structure type. American Mineralogist, 93, 17871798.
Makovicky, E., Petricek, V., Dušek, M. and Topa, D. (2011) The crystal structure of franckeite, Pb217S119 3Fe4 0Sb8 j S56.9 . American Mineralogist, 96, 16861702.
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., Balic-Zunic, T. Mumme, W.G., Vurro, F., Topa, D., Bindi, L., Bente, K. and Shimizu, M. (2008) Sulfosalt systematics: a review. Report of the sulfosalt sub-committee of the IMA Commission on Ore Mineralogy. European Journal of Mineralogy, 20,746
Oxford Diffraction (2006) CrysAlis RED (Version and ABSPACK in CrysAlis RED. Oxford Diffraction Ltd, Abingdon, UK.
Paar, W.H., Moëlo, Y., Mozgova, N.N., Organova, N.I., Stanley, C.J., Roberts, A.C., Culetto, EX, Effenberger, H.S., Topa, D., Putz, H., Sureda, R.J. and de Brodtkorb, M.K. (2008) Coiraite, (Pb,Sn2+)12.5 As3Fe2+Sn4+ 5 S28: a franckeite-type new mineral from Jujuy Province, NW Argentina. Mineralogical Magazine, 72, 10831101.
Parasyuk, O.V., Gulay, L.D., Piskach, L.V. and Gagalovska, O.P. (2002) The Ag2S-HgS-GeS2 system at 670 K and the crystal structure of the Ag2HgGeS4 compound. Journal of Alloys and Compounds, 336, 213217.
Petrova, I.V., Pobedimskaya, E.A. and Bryzgalov, I.A. (1988) Crystal structure of miharaite Cu4FePbBiS6. Doklady Akademii Nauk SSSR, 299, 123127 [in Russian].
Roth, P., Raber, T., Drechsler, E. and Cannon, R. (2014) The Lengenbach Quarry, Binn Valley, Switzerland. The Mineralogical Record, 45, 157196.
Sachdev, S.C. and Chang, L.L.Y.. (1975) Phase relations in the system tin-antimony-lead sulfides and the synthesis of cylindrite and franckeite. Economic Geology, 70, 11111122.
Sheldrick, G.M. (2008) A short history of SHELX. Acta Crystallographica, A64, 112122.
Wilson, A.J.C.. (1992) International Tables for X-ray Crystallography Volume C. Kluwer, Dordrecht, The Netherlands.


Ferrostalderite, CuFe2TlAs2S6, a new mineral from Lengenbach, Switzerland: occurrence, crystal structure, and emphasis on the role of iron in sulfosalts

  • Cristian Biagioni (a1), Luca Bindi (a2), Fabrizio Nestola (a3), Ralph Cannon (a4), Philippe Roth (a5) and Thomas Raber (a6)...


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