Vibrational normal modes of SiO2. III. α-Berlinite (AlPO4) and its relations to Γ–A phonon dispersion curves in α-quartz
- 15 June 1978
- journal article
- conference paper
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 68 (12) , 5336-5341
- https://doi.org/10.1063/1.435710
Abstract
The valence force field, previously obtained to describe the vibrational normal modes of quartz, cristobalite, and tridymite forms of SiO2 (parts I and II), has been used to calculate the phonon dispersion curves and elastic constants of α‐quartz. The reasonably good fit to the experimental data suggested that the same valence force field may be valid in α‐berlinite, an isomorph of α‐quartz. The following results confirm the analogy between SiO2 and AlPO4.Keywords
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