Inelastic light scattering has been used to probe the phonon behavior in AlAsO₄, GaAsO₄, GaPO₄, and BPO₄. The results are compared with earlier studies of isomorphic AlPO₄, SiO₂, and GeO₂. A previous ambiguity regarding symmetry assignments for phonons in GeO₂ is resolved. Linewidths and frequencies are measured up to 1300^∘{}K.
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Dultz et al. (1975) studied this question.
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