High-pressure structural behaviour of silver(I) fluoride
Abstract
The high-pressure structural behaviour of AgF has been studied by the powder neutron diffraction technique. The material undergoes a pressure-induced transition at 2.70(2) GPa from the rocksalt structure to the CsCl-type arrangement with a volume change of 0953-8984/10/36/005/img1. On decreasing pressure, the reverse 0953-8984/10/36/005/img2 transition occurs via an intermediate phase possessing the hexagonal anti-NiAs structure. A plausible structural model to explain this observation is provided, together with a discussion of the relative stability of the (anti-) NiAs arrangement as a high-pressure polymorph in binary MX compounds.
- Publication:
-
Journal of Physics Condensed Matter
- Pub Date:
- September 1998
- DOI:
- 10.1088/0953-8984/10/36/005
- Bibcode:
- 1998JPCM...10.7945H