| CaCrO4与YCrO4的高压拉曼及晶体结构相变研究 |
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| 引用本文： | 龙有文,杨留响,靳常青.CaCrO4与YCrO4的高压拉曼及晶体结构相变研究[J].光散射学报,2009,21(2):142. |
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| 作者姓名： | 龙有文 杨留响 靳常青 |
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| 作者单位： | 中国科学院物理研究所北京凝聚态物理国家实验室,北京,100080 |
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| 摘 要： | 利用原位高压拉曼散射的方法, 在6.0 GPa及3.0 GPa分别观察到锆石型化合物CaCrO4与YCrO4压力诱导的晶体结构相变。卸压后的拉曼光谱表明了结构相变的不可逆性。并且, 通过比较与实验的方法, 高压新相被确认为白钨矿相。在锆石-白钨矿相变中, 晶体对称性由I41/amd (No. 141, Z＝4)降低为I41/a (No. 88, Z＝4)。
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| 关 键 词： | 原位高压 拉曼光谱 结构相变 |
| 收稿时间： | 2007/6/30 |
A Study on High-Pressure Raman Scattering and Crystal Structural Phase Transition of CaCrO_4 and YCrO_4 |
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| LONG You-wen,YANG Liu-xiang,JIN Chang-qing.A Study on High-Pressure Raman Scattering and Crystal Structural Phase Transition of CaCrO_4 and YCrO_4[J].Chinese Journal of Light Scattering,2009,21(2):142. |
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| Authors: | LONG You-wen YANG Liu-xiang JIN Chang-qing |
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| Institution: | National Laboratory for Condensed Matter Physics;Institute of Physics;Chinese Academy of Sciences;Beijing 100080;China |
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| Abstract: | By using in situ high-pressure Raman scattering method,pressure-induced crystal structural phase transition was observed at 6.0 and 3.0 GPa in the zircon-type CaCrO4 and YCrO4 compounds,respectively.Pressure-released Raman spectra show that the phase transition is irreversible.Moreover,the high-pressure new phase was determined to be a scheelite structure by means of comparison and experiment.During the zircon-scheelite phase transition,the crystal symmetry was reduced from I41/amd(No.141,Z=4) to I41/a(No.8... |
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| Keywords: | in situ high pressure Raman spectrum structural phase transition |
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