Ordering in Pb(Mg {1}/{3}Nb {2}/{3})O 3Pb(Mg {1}/{2}W {1}/{2})O 3 solid solutions
Abstract
Compositional ordering was found to occur in the ferroelectric (1 - x) Pb(Mg {1}/{3}Nb {2}/{3})O 3-antiferroelectric x Pb(Mg {1}/{2}W {1}/{2})O 3 solid solution system. X-Ray diffraction and neutron profile fitting structure refinement were used to refine one such composition with x = 0.9. The paraelectric structure of compositions with x < 0.2 is that of the disordered perovskite (space group Pm3 m), whereas for 0.2 ≤ x < 1.0 the structure is that of ordered perovskite (space group Fm3 m). The oxygen octahedra in the ordered state are regular but no longer equivalent.
- Publication:
-
Journal of Solid State Chemistry France
- Pub Date:
- November 1980
- DOI:
- 10.1016/0022-4596(80)90502-2
- Bibcode:
- 1980JSSCh..35..267A