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0.1~800MPa压力下方解石拉曼光谱的实验研究

DOI: 10.11858/gywlxb.2003.03.012, PP. 226-229

Keywords: 高压,压标,方解石,拉曼光谱,金刚石压腔

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Abstract:

利用石英的拉曼谱峰与温度和压力的关系,检验了在金刚石压腔中用方解石拉曼谱峰确定体系压力的可行性,并初步确定了在常温下方解石的拉曼谱峰与压力的关系。实验研究结果表明:在实验的压力范围内方解石稳定,且其1085cm-1谱峰约为石英464cm-1谱峰的3倍强度,因此非常适合作为热液金刚石压腔的压力标定物。在温度26℃、压力0.1~800MPa条件下,方解石的拉曼谱峰(1085cm-1)随着压力的增加,呈线形增大,其关系式为:p(MPa)=192×(νp-1085)-21.8,1085cm-1<νp<1090cm-1。

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