Lattice vibrations in high-pressure phases of LiYF4
β Scribed by A. Sen; S.L. Chaplot; R. Mittal
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 578 KB
- Volume
- 363
- Category
- Article
- ISSN
- 0921-4526
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π SIMILAR VOLUMES
The high-pressure phase transition from ambient pressure a-LiBH 4 to high-pressure b-LiBH 4 was observed by Raman spectroscopy and X-ray diffraction between 0.8 and 1.1 GPa. The phase boundary between these two phases was mapped over a large range of temperatures using thermal conductivity studies a
A Raman study to 100 kbar has confirmed existence of a second-order phase change in NaNO, at 8.5 kbar at ambient temperature, and revealed a new transition at 48.0 kbar. This transition appears to be first-order in type and involve cell doubling.