| 早在1968年，Brasch等人第一次在DAC中进行了Raman散射研究。通过高压下的拉曼光谱不仅可以获得物质在高压下的声子谱、电-声相互作用以及晶格振动的非简谐信息,还可以测量物质的熔化曲线以及Mode-Grüneisen参数、固-固相变、固-液相变、P-T相图等。当晶体结构发生固-固相变时，反映晶体结构特征的外振动谱线会发生明显的变化。我们利用金刚石对顶砧高压装置，对CaSO进行了高压原位Raman光谱的测量，通过高压Raman光谱的变化，发现CaSO在压力为1.8GPa时，发生了压力导致的晶体结构相变；通过对(MgFeCa)AlSiO的高压原位Raman光谱和X射线衍射的测量，获得了其Mode-Grüneisen参数。
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