%0 Journal Article
%T Raman Spectra of Quartz and Pb4+-Doped SiO2 Crystals at Different Temperature and Pressure
%J Crystals | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/cryst9110569
%X In order to seek for new Raman crystals, the manuscript presented the discussion on the Raman frequency of ¦Á-quartz, ¦Â-quartz, as well as Pb 4+-doped SiO 2 crystals at different temperature and pressure. The results demonstrated that as the pressure increased, the Raman lines shifted towards higher frequency for ¦Á-SiO 2 crystal, while for ¦Â-SiO 2 crystals, the main lines moved to lower frequency. Several new peaks were generated from the Pb 4+-doped ¦Á-SiO 2 crystals. The Pb 4+-doped ¦Â-SiO 2 crystals presented strong and ample Raman beams in the low-frequency range. The airfoil-shaped spectra appeared and broadened at high temperature and pressure. It could be inferred that the Pb 4+-doped SiO 2 crystals were excellent Raman crystal candidates. View Full-Tex
%U https://www.mdpi.com/2073-4352/9/11/569