常温0～1 GPa压力下重晶石的拉曼光谱研究

doi:10.3964/j.issn.1000-0593(2011)06-1529-04

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Abstract The variation characters of Raman spectra of S—O symmetric stretching vibration ν₉₈₇ and symmetric bending vibration ν₄₅₂ and ν₄₆₂ of barite at high pressure were studied using moissanite anvil cell. The experimental results show that barite is stable at the pressure of 0～1 GPa and ambient temperature, and the Raman peak positions of barite shift to higher frequency with increasing pressure. The relations between the Raman shifts and system pressure are given as follows: ν₉₈₇=0.004 4p+987.42, ν₄₅₂=0.002 3p+452.6, ν₄₆₂=0.001 8p+462.42, and that stretching vibrations are more affected by pressure than bending vibrations. The intensity of 987 cm^-1 Raman peak of barite is six times greater than that of 464 cm^-1 Raman peak of quartz, so barite can be used as a good pressure gauge. Besides, the relation between the system pressure and Raman shift of 987 cm^-1 peak position of barite is given as follows: p(MPa)=223.16×(Δν_p)₉₈₇-90.35(987 cm^-1＜ν_p＜992 cm^-1). The difference in the measured relative pressure-shift of the Raman line of the symmetric stretching vibration among various sulfate minerals shows the compressibility and strength of the S—O bond in the SO₄ group.

Key words：High pressure;Barite;Raman spectra;Moissanite anvil cell

Received: 2010-09-01 Accepted: 2010-12-22

ZTFLH:

P578.7

Corresponding Authors: ZHENG Hai-fei E-mail: hfzheng@pku.edu.cn

Cite this article:

LIU Chuan-jiang,ZHENG Hai-fei. Raman Spectra Study of Barite at the Pressure of 0～1 GPa and Ambient Temperature [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(06): 1529-1532.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2011)06-1529-04 OR https://www.gpxygpfx.com/EN/Y2011/V31/I06/1529