Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (13) Citing Articles via Google Scholar Google Scholar Articles by MEERSCHAUT, A. Articles by ORLANDI, P. Search for Related Content GeoRef GeoRef Citation

Lead-antimony sulfosalts from Tuscany (Italy). IV. Crystal structure of pillaite, Pb₉Sb₁₀S₂₃CIO_0.5, an expanded monoclinic derivative of hexagonal Bi(Bi₂S₃)₉I₃, from the zinkenite group

¹ Laboratoire de Chimie des Solides, Institut des Matériaux J. Rouxel, UMR CNRS 6502, 2 rue de la Houssiniére, 44 322 Nantes Cedex 3, France
² Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, I-56126 Pisa, Italy

^* E-mail: moelo{at}cnrs-imn.fr

The crystal structure of pillaite, a recently described Pb-Sb oxy-chloro-sulfosalt from the Buca della Vena mine, Tuscany (Italy), was solved and refined to a residual R of 0.045 in the monoclinic system, with space group C2/m, and a = 49.49(1), b = 4.1259(8), c = 21.828(4) Å, β = 99.62(3)⁰, V = 4394(2) Å3. The structural formula is Pb_9.16Sb_9.84S₂₃ClO_0.5, corresponding to the electron-microprobe one Cu_0.10Pb_9.16Sb_9.84S_22.94Cl_1.06O _0.5 (ideally Pb₉Sb₁₀S₂₃ClO_0.5), with Z = 4 and D_cale. = 5.87. The crystal structure is organized around pseudo-threefold axes where chlorine atoms are in a trigonal prismatic coordination with Pb atoms. An oxygen position, half-filled, is bonded to two Sb atoms, like in scainiite. Pairs of pseudo-trigonal rods parallel to the elongation b-direction are connected along [10] to form rod-layers. The pillaite structure is an expanded homologue of hexagonal Bi(Bi₂S₃)₉I₃. Among lead sulfosalts, it belongs to the zinkenite group of cyclically twinned structures. Pillaite is the first example of a Pb-Sb sulfosalt where small amounts of two anion species simultaneously play a specific crystal chemical role, which is essential for the stabilization of the crystal structure: chlorine, like in dadsonite, and oxygen, like in scainiite.

Key-words: pillaite, crystal structure, lead, antimony, oxy-chloro-sulfide, sulfosalt, zinkenite group.

This article has been cited by other articles:

				M. Zelenski, A. Garavelli, D. Pinto, F. Vurro, Y. Moelo, L. Bindi, E. Makovicky, and E. Bonaccorsi Tazieffite, Pb20Cd2(As,Bi)22S50Cl10, a new chloro-sulfosalt from Mutnovsky volcano, Kamchatka Peninsula, Russian Federation American Mineralogist, October 1, 2009; 94(10): 1312 - 1324. [Abstract] [Full Text] [PDF]

				E. Makovicky and D. Topa THE CRYSTAL STRUCTURE OF SULFOSALTS WITH THE BOXWORK ARCHITECTURE AND THEIR NEW REPRESENTATIVE, Pb15-2xSb14+2xS36Ox Can Mineral, February 1, 2009; 47(1): 3 - 24. [Abstract] [Full Text] [PDF]

				D. Pinto, E. Bonaccorsi, T. Balic-Zunic, and E. Makovicky The crystal structure of vurroite, Pb20Sn2(Bi, As)22S54Cl6: OD-character, polytypism, twinning, and modular description American Mineralogist, May 1, 2008; 93(5-6): 713 - 727. [Abstract] [Full Text] [PDF]

				Y. Moelo, E. Makovicky, N. N. Mozgova, J. L. Jambor, N. Cook, A. Pring, W. Paar, E. H. Nickel, S. Graeser, S. Karup-Moller, et al. Sulfosalt systematics: a review. Report of the sulfosalt sub-committee of the IMA Commission on Ore Mineralogy European Journal of Mineralogy, February 1, 2008; 20(1): 7 - 46. [Abstract] [Full Text] [PDF]

				F. Laufek, R. Pazout, and E. Makovicky Crystal structure of owyheeite, Ag1.5Pb4.43Sb6.07S14: refinement from powder synchrotron X-ray diffraction European Journal of Mineralogy, July 1, 2007; 19(4): 557 - 566. [Abstract] [Full Text] [PDF]

				P. Orlandi, A. Meerschaut, Y. Moelo, P. Palvadeau, and P. Leone LEAD ANTIMONY SULFOSALTS FROM TUSCANY (ITALY). VIII. ROUXELITE, Cu2HgPb22Sb28S64(O,S)2, A NEW SULFOSALT FROM BUCA DELLA VENA MINE, APUAN ALPS: DEFINITION AND CRYSTAL STRUCTURE Can Mineral, June 1, 2005; 43(3): 919 - 933. [Abstract] [Full Text] [PDF]

				P. PALVADEAU, A. MEERSCHAUT, P. ORLANDI, and Y. MOELO Lead-antimony sulfosalts from Tuscany (Italy). VII. Crystal structure of pellouxite, ~ (Cu,Ag)2Pb21Sb23S55ClO, an expanded monoclinic derivative of Ba12Bi24S48 hexagonal sub-type (zinkenite group) European Journal of Mineralogy, October 1, 2004; 16(5): 845 - 855. [Abstract] [Full Text] [PDF]

				E. Makovicky, T. Balic-Zunic, and D. Topa THE CRYSTAL STRUCTURE OF NEYITE, Ag2Cu6Pb25Bi26S68 Can Mineral, October 1, 2001; 39(5): 1365 - 1376. [Abstract] [Full Text] [PDF]

				J. A. Mandarino NEW MINERALS Can Mineral, October 1, 2001; 39(5): 1473 - 1502. [Full Text] [PDF]