Relationship between covalence and displacive phase transition temperature in RAO{sub 4} and LiAO{sub 3} (R = rare-earth element and A = Nb and Ta)
Journal Article
·
· Journal of Solid State Chemistry
- Tohoku Univ., Sendai (Japan)
- Univ. of Tsukuba (Japan)
Crystal structure analyses by TOF neutron powder diffraction are performed for R TaO{sub 4} (R = rare-earth element) and the Ta-O interatomic distances are determined. The relationship between the covalency of A-O bonds (A = Nb and Ta), which show the most shortening upon phase transition, and the transition temperature is discussed for RAO{sub 4} and LiAO{sub 3}, and the parameters of Ta-O covalence are determined.
- OSTI ID:
- 70177
- Journal Information:
- Journal of Solid State Chemistry, Vol. 116, Issue 1; Other Information: PBD: Apr 1995
- Country of Publication:
- United States
- Language:
- English
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