RAMAN-SPECTRUM OF O-18-LABELED HAFNIA

The Raman spectrum of O-18-labelled monoclinic Hafnia (HfO2) is report ed. All of the eighteen Raman bands predicted from a group theoretical analysis are observed. The six Raman bands at 300-130 cm(-1) have lit tle dependence on the O-18 content, whereas the remaining twelve Raman bands shift to low wavenumbers by the O-18-substitution. The former s ix are assigned to the Hf-Hf vibrations and the latter twelve are assi gned to the Hf-O or O-O vibrations. Copyright (C) 1997 Elsevier Scienc e Ltd.