Temperature Dependence of the Raman Frequency of an Internal Mode for SiO2-Moganite Close to theα-βTransition

摘要

The temperature dependence of the 501 cm−1frequency of the vibrational mode is analyzed for SiO2-moganite. The experimental data for the heating and cooling cycles of moganite from the literature is used for our analysis. The coexistence ofα-βmoganite is obtained over a finite temperature interval, and theα-βmoganite transition at around 570 K is studied, as observed experimentally.