Antiferroelectric superstructure of PB2CoWO6
- 1 January 1978
- journal article
- research article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 21 (1) , 449-450
- https://doi.org/10.1080/00150197808237294
Abstract
Optical study of perovskite type Pb2CoWO6 has revealed that, on cooling, the cubic crystal changes to monoclinic below 20°C. New superstructure reflections appearing below 20°C indicate that the low temperature phase is antiferroelectric incommensurate phase. Incommensurate modulation of lattice periodicity has been studied as a function of temperature. The modulation wave vector lies on the monoclinic ac-plane and main atomic displacement seems to occur along the baxis. The temperature range of the incommensurate phase is very wide, from 20°C down to lower than −120°C.Keywords
This publication has 1 reference indexed in Scilit:
- Pseudo-cubic alkaline-earth tungstates and molybdates of theR3MX6typeActa Crystallographica, 1951