Lattice dynamic behavior of orthoferrosilite (FeSiO3) toward phase transition under compression

Jennifer Kung, Baosheng Li

研究成果: Article同行評審

8 引文 斯高帕斯(Scopus)

摘要

We performed elasticity and Raman scattering measurements of ortho-FeSiO3 up to ∼7.5 GPa. The velocities of the P and S waves were measured in conjunction with in situ X-radiation techniques. Above 5 GPa, the velocity of the S wave, but not the P wave, exhibited strong softening while the averaged crystal structure, as indicated by X-ray diffraction, maintained an orthorhombic symmetry. Within the same pressure range, the Raman shifts showed systematic increasing as a function of pressure. Based on the results of both Mg and Fe end-member orthopyroxenes, the observed velocity anomalies marked the onset of a phase transition to the high-pressure phase. The experimental results in this study provide insight into lattice dynamic behavior in terms of the composition effect at the onset of the phase transition in the orthopyroxene group under compression.

原文English
頁(從 - 到)12410-12419
頁數10
期刊Journal of Physical Chemistry C
118
發行號23
DOIs
出版狀態Published - 2014 六月 12

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 能源(全部)
  • 物理與理論化學
  • 表面、塗料和薄膜

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