Abstract
The effects of differently charged Ge impurities on the local atomic structure and lattice dynamics of [Formula: see text]-quartz were studied. We have determined the equilibrium structures and calculated the symmetrized local density of vibrational states for the Ge-doped [Formula: see text]-quartz. The frequencies of localized vibrations of [Formula: see text]- and [Formula: see text]-symmetries induced by Ge impurities were obtained. Besides, we have analyzed what contribution the vibrations of atoms located around the Ge impurities make to the localized symmetrized vibrations.
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