New structural phase transitions in PbMBO$_{4}$ complex oxides: Raman spectroscopy and x-ray diffraction studies

ORAL

Abstract

Complex oxides with the mullite crystal structure belong to the most important phase in both traditional and advanced ceramics. Mullites are built of infinite chains of edge-sharing MO$_{6}$ octahedra, bridged by various oxide groups. Interest in metal borates stems from their useful nonlinear optical properties. New complex oxides in the mullite family PbMBO$_{4}$ (M= Fe, Mn, Al) were synthesized and characterized. Using Raman spectroscopy and synchrotron x-ray diffraction at elevated pressure we demonstrate new structural phase transitions.

*DOE-NNSA DE-FC08-01NV14049. DOE-BES, DOE-NNSA, NSF, DOD –TACOM, the W.M. Keck Found. DOE-BES, W-31-109-ENG-38

Authors

  • Patricia Kalita

    • Dept. of Physics and Astronomy, University of Nevada Las Vegas, Las Vegas, NV, USA

  • Andrew Cornelius

    • Dept. of Physics and Astronomy, University of Nevada Las Vegas, Las Vegas, NV, USA

  • Kristina Lipinska

    • Harry Reid Center for Environmental Studies, University of Nevada Las Vegas, NV, USA

  • Oliver Hemmers

    • Harry Reid Center for Environmental Studies, University of Nevada Las Vegas, NV, USA

  • Stanislav Sinogeikin

    • Geophysical Lab., Carnegie Institution of Washington, Washington, DC, USA

  • M. Mangir Murshed

    • Chemische Kristallographie fester Stoffe, Universit\"at Bremen, Bremen, Germany

  • Thorsten Gesing

    • Chemische Kristallographie fester Stoffe, Universit\"at Bremen, Bremen, Germany

  • Hartmut Schneider

    • Inst. of Crystallography, University of Koeln, Koeln, Germany