Abstract
Infrared and Raman spectra of polycrystalline Y 2O 3 as well as polarized Raman spectra of Y 2O 3 single crystals have been measured. A complete assignment of the bands is proposed. A normal coordinate analysis using a generalized valence force field enabled us to fit the observed frequencies with a satisfactory accuracy (3.5%). The calculated force constants are discussed and compared with those of α-Al 2O 3 exhibiting the same atomic coordination.
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