X-ray-absorption fine-structure study of the B1-to-B2 phase transition in RbCl
Abstract
Pressure-induced changes in the local structure about Rb atoms in RbCl are investigated by means of x-ray-absorption fine-structure spectroscopy. Rb K-edge data were taken in fine steps across the pressure-induced NaCl-structure (B1)-to-CsCl-structure (B2) transition at 0.55 GPa. Previous diffraction studies of this phase transition indicate several martensiticlike properties, including the coexistence of both phases at 0.49 GPa. Our results are consistent with this coexistence of phases at the transition. In addition, we find no evidence for an intermediate phase.
- Publication:
-
Physical Review B
- Pub Date:
- April 1998
- DOI:
- 10.1103/PhysRevB.57.7543
- Bibcode:
- 1998PhRvB..57.7543K
- Keywords:
-
- 61.10.Ht;
- 64.60.-i;
- 61.50.Ks;
- 78.55.Fv;
- X-ray absorption spectroscopy: EXAFS NEXAFS XANES etc.;
- General studies of phase transitions;
- Crystallographic aspects of phase transformations;
- pressure effects;
- Solid alkali halides