Electron-Diffraction Analysis of the Ferroelectric Aluminate Sodalite Sr8Al12o242
The structures of the cubic, the tetragonal and the orthorhombic phases of single crystals of the ferroelectric aluminate sodalite Sr/sub 8/(Al/sub 12/O/sub 24/)(CrO/sub 4/)/sub 2/ were investigated by selected area and convergent beam electron diffraction in the temperature range between 180 and 370 K. Evidence was obtained for the non-centrosymmetric character of the cubic phase which infers the space group I43m. The electron diffraction analysis points to the following phases I43m, P4/sub 2//mmc and Ama2.
WOS:A1991GR71000013
1991
120
3-4
261
270
Stoto, T Ecole Polytech Fed Lausanne,Inst Genie Atom,Phb,Phys Solides Semi Cristallins Grp,Ch-1015 Lausanne,Switzerland Ecole Polytech Fed Lausanne,Mxd,Ceram Lab,Ch-1015 Lausanne,Switzerland Ecole Polytech Fed Lausanne,Mxc,Inst Interdept Microscopie Electr,Ch-1015 Lausanne,Switzerland Univ Geneva,Dept Chim Minerale Analyt & Appl,Ch-1211 Geneva 4,Switzerland
Gr710
Cited References Count:18
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