High-pressure X-ray diffraction study on alpha-PbF2

Details High-pressure X-ray diffraction study on alpha-PbF2 High-pressure X-ray diffraction study on alpha-PbF2

2002-09-04

arxiv.org/abs/cond-mat/0209082v1

Physics

Condensed Matter

Materials Science

12 pages, 5 figures, 4 tables, submitted to J. Phys. Chem. Sol

Scientific paper

The high-pressure behaviour of alpha-PbF2 has been investigated by angular-dispersive synchrotron X-ray powder diffraction up to 6.55(8) GPa. The fit of a 3rd-order Birch-Murnaghan equation-of-state gave the volume at zero pressure V0=194.14(4)\AA$^3 and the bulk modulus b_0=47.0(6)GPa with the pressure derivative b'=7.9(4). The continuous-symmetry-measure approach has been used for the quantification of the distortion of the coordination polyhedron in alpha-PbF2 revealing an increasing distortion with pressure. keywords here: high pressure, X-ray diffraction, inorganic compounds PACS: 61.10.N2, 62.50.+P, 64.20.+t, 07.35, 61.10.-i

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