正磷酸盐晶体Ba3(PO4)2和Sr3(PO4)2高温拉曼光谱研究*
Temperature-dependent Raman spectroscopic study on orthophosphates Ba3(PO4)2 and Sr3(PO4)?2
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摘要: 测量了碱土金属正磷酸盐Ba3(PO4)2和Sr3(PO4)2常温及高温拉曼光谱,对拉曼振动模式进行指认,并分析了晶体拉曼振动光谱及晶体结构在高温下的变化.在温度升高的过程中,拉曼振动频率向低频移动且振动峰宽度展宽,晶体中的P-O平均键长随温度升高而变长,但O-P-O的键角并未发生变化.晶体在900?C以下无结构相变发生.
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关键词:
- Ba3(PO4)2和Sr3(PO4)2 /
- 高温拉曼光谱 /
- 振动模式 /
- 高温结构
Abstract: Temperature-dependent Raman spectroscopic study on orthophosphates Ba3(PO4)2 and Sr3(PO4)2 were carried out up to 900 ?C. The change of Raman lines and crystal structure has been investigated at high-temperatures. It is found that all the Raman lines exhibit a decrease in frequency shifts and the width of the Raman lines increases with the increase in temperature. The P-O bond lengths in the crystal increase in high-temperature, but the O-P-O bond angles have less change. No phase changes have been observed under 900 ?C. -
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