拉曼光谱
石英
固溶体
分析化学(期刊)
相(物质)
锗
热液循环
材料科学
Crystal(编程语言)
环境压力
化学
结晶学
化学工程
热力学
硅
色谱法
冶金
光学
物理
有机化学
计算机科学
程序设计语言
工程类
作者
Valentin Kovalev,А. В. Спивак,Т. В. Сеткова,Д. А. Ксенофонтов,Е. А. Волкова,Vitaly I. Korepanov,V. S. Balitsky,Egor Zakharchenko
标识
DOI:10.1016/j.jpcs.2023.111749
摘要
Spontaneous α-Si1-xGexO2 single crystals were synthesized using the set of crystal growth techniques: hydrothermal (XGe = 0.09, 0.20), flux (XGe = 0.45, 0.70) and recycling (XGe = 0.96). The XRD and spectroscopic studies with non-negative matrix factorization show linear dependences of structural parameters and Raman shift on germanium content and confirmed the existence of a complete series of α-Si1-xGexO2 solid solution. The synthesized samples of the solid solution were studied by Raman spectroscopy at the ambient conditions and for the first time at high pressures up to ∼30 GPa. The obtained results suggest a phase transition “α-quartz → post-quartz” for Si1-xGexO2 in the examined pressure range. The formation of the possible intermediate phase (quartz-II) was detected for Si1-xGexO2 with XGe = 0.09, 0.20 and 0.45 at 11, 10 and 7.5 GPa, respectively. The linear dependences of the pressure value of phase transitions on germanium content were observed. At decompression, the post-quartz phase remained stable that was determined by Raman spectra for all compositions of solid solution. Obtained experimental results revealed the correlation of the chemical composition, spectroscopic characteristics, and structural deformations at ambient conditions and at high pressures.
科研通智能强力驱动
Strongly Powered by AbleSci AI