Raman spectra of stronadelphite Sr-5(PO4)(3)F at high pressures

	Raman spectra of stronadelphite Sr-5(PO4)(3)F at high pressures
	Shuangmeng Zhai; Sean R. Shieh; Weihong Xue
	2015
Source Publication	Physics & Chemistry of Minerals
Volume	42 Issue:7 Pages:579-585
Abstract	The Raman spectra of synthetic stronadelphite, Sr-5(PO4)(3)F, were investigated up to 21.1 GPa using a diamond anvil cell at room temperature. The new splittings of the PO4 asymmetric stretching nu(3b)(A(g)) and bending nu(4b)(A(g)) vibrations were observed during compression. The Raman frequencies of all observed bands for stronadelphite continuously increase with increasing pressure. The quantitative analysis of pressure dependences of Raman bands indicates that the nu(3) asymmetric and nu(1) symmetric stretching vibrations show larger pressure coefficients (from 3.33 to 5.20 cm(-1)/GPa), whereas the nu(4) and nu(2) bending vibrations have smaller pressure coefficients (from 1.35 to 1.96 cm(-1)/GPa), which may be attributed to the pressure-induced structural evolution of PO4 tetrahedron in stronadelphite at high pressure. The external modes show larger pressure coefficient from 3.47 to 6.41 cm(-1)/GPa. The pressure coefficients of the PO4 internal modes lead to the isothermal mode Gruneisen parameters varying from 0.214 to 0.449, which yields an average mode Gruneisen parameter of 0.332. On the other hand, those of the external modes give the isothermal mode Gruneisen parameters from 1.53 to 1.91. Therefore, the external mode Gruneisen parameters mainly contribute to the bulk Gruneisen parameters.
Subject Area	地球深部物质与流体作用地球化学
Indexed By	SCI
Language	英语
Document Type	期刊论文
Identifier	http://ir.gyig.ac.cn/handle/352002/6050
Collection	地球内部物质高温高压实验室_地球内部物质高温高压实验室_期刊论文
Recommended Citation GB/T 7714	Shuangmeng Zhai,Sean R. Shieh,Weihong Xue. Raman spectra of stronadelphite Sr-5(PO4)(3)F at high pressures[J]. Physics & Chemistry of Minerals,2015,42(7):579-585.
APA	Shuangmeng Zhai,Sean R. Shieh,&Weihong Xue.(2015).Raman spectra of stronadelphite Sr-5(PO4)(3)F at high pressures.Physics & Chemistry of Minerals,42(7),579-585.
MLA	Shuangmeng Zhai,et al."Raman spectra of stronadelphite Sr-5(PO4)(3)F at high pressures".Physics & Chemistry of Minerals 42.7(2015):579-585.

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