caa a22 4500 463217217 CHVBK 20180405153200.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s00269-007-0163-9 doi (NATIONALLICENCE)springer-10.1007/s00269-007-0163-9 Hydrostatic compression of galenobismutite (PbBi2S4): elastic properties and high-pressure crystal chemistry [Elektronische Daten] [Lars Olsen, Tonci Balic-Zunic, Emil Makovicky, Angela Ullrich, Ronald Miletich] A single-crystal sample of galenobismutite was subjected to hydrostatic pressures in the range of 0.0001 and 9GPa at room temperature using the diamond-anvil cell technique. A series of X-ray diffraction intensities were collected at ten distinct pressures using a CCD equipped 4-circle diffractometer. The crystal structure was refined to R1(|F0|>4σ) values of approximately 0.05 at all pressures. By fitting a third-order Birch-Murnaghan equation of state to the unit-cell volumes V 0=700.6(2) Å3, K 0=43.9(7) GPa and dK/dP=6.9(3) could be determined for the lattice compression. Both types of cations in galenobismutite have stereochemically active lone electron pairs, which distort the cation polyhedra at room pressure. The cation eccentricities decrease at higher pressure but are still pronounced at 9GPa. Galenobismutite is isotypic with CaFe2O4 (CF) but moves away from the idealised CF-type structure during compression. Instead of the two octahedral cation sites and one bi-capped trigonal-prismatic site, PbBi2S4 attains a new high-pressure structure characterised by one octahedral site and two mono-capped trigonal-prismatic sites. Analyses of the crystal structure at high pressure confirm the preference of Bi for the octahedral site and the smaller one of the two trigonal-prismatic sites. Springer-Verlag, 2007 Galenobismutite nationallicence High pressure nationallicence Lone electron pair nationallicence Equation of state nationallicence Calcium ferrite structuretype nationallicence Olsen Lars Geological Institute, University of Copenhagen, Oester Voldgade 10, 1350, Copenhagen, Denmark aut Balic-Zunic Tonci Geological Institute, University of Copenhagen, Oester Voldgade 10, 1350, Copenhagen, Denmark aut Makovicky Emil Geological Institute, University of Copenhagen, Oester Voldgade 10, 1350, Copenhagen, Denmark aut Ullrich Angela Mineralogisches Institut, Universität Heidelberg, Im Neuenheimer Feld 236, 69120, Heidelberg, Germany aut Miletich Ronald Mineralogisches Institut, Universität Heidelberg, Im Neuenheimer Feld 236, 69120, Heidelberg, Germany aut Physics and Chemistry of Minerals Springer-Verlag 34/7(2007-09-01), 467-475 0342-1791 34:7<467 2007 34 269 https://doi.org/10.1007/s00269-007-0163-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00269-007-0163-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Olsen Lars Geological Institute, University of Copenhagen, Oester Voldgade 10, 1350, Copenhagen, Denmark aut NATIONALLICENCE 700 1- Balic-Zunic Tonci Geological Institute, University of Copenhagen, Oester Voldgade 10, 1350, Copenhagen, Denmark aut NATIONALLICENCE 700 1- Makovicky Emil Geological Institute, University of Copenhagen, Oester Voldgade 10, 1350, Copenhagen, Denmark aut NATIONALLICENCE 700 1- Ullrich Angela Mineralogisches Institut, Universität Heidelberg, Im Neuenheimer Feld 236, 69120, Heidelberg, Germany aut NATIONALLICENCE 700 1- Miletich Ronald Mineralogisches Institut, Universität Heidelberg, Im Neuenheimer Feld 236, 69120, Heidelberg, Germany aut NATIONALLICENCE 773 0- Physics and Chemistry of Minerals Springer-Verlag 34/7(2007-09-01), 467-475 0342-1791 34:7<467 2007 34 269 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer