Raman and infrared study of pressure-induced structural changes in MgSiO3, CaMgSi2O6, and CaSiO3 glasses

Abstract

The principal pressure-induced changes in spectra observed are reversible, so that the characterization of the high density states of these materials requires in situ measurements at high pressure. The dominant change in all three glasses is a marked shift of the midfrequency Raman bands to higher frequencies at higher pressure