ANION DISTRIBUTIONS AND PHASE-TRANSITIONS IN CUS1-XSEX(X = 0-1) STUDIED BY RAMAN-SPECTROSCOPY
ANION DISTRIBUTIONS AND PHASE-TRANSITIONS IN CUS1-XSEX(X = 0-1) STUDIED BY RAMAN-SPECTROSCOPY
复制标题
DOI：
10.1006/jssc.1993.1242
复制
发表时间：
1993-08-01
影响因子：
3.3
通讯作者：
NOZAKI, H
中科院分区：
文献类型：
--
作者：
ISHII, M;SHIBATA, K;NOZAKI, H
通过拉曼光谱研究了与铜蓝同构的CuS_（1-x）Sex（x= 0-1）中阴离子的分布和相变。在六方CuS型固溶体中，存在两种不同的阴离子位（六方空间群P63/mmc的2c和4 e位），硒原子优先占据4 e位。在300 ~ 80 K温度范围内，测量了七个CuS_（1-x）Sexin样品的拉曼峰频率随温度的变化。对于除CuSe外的每种样品，最低频率的拉曼峰都显示出软模行为，这被认为与结构相变有关。这些结果已被讨论，参考由X射线衍射法得到的结果。在这些固溶体中，相变温度随着硒含量的增加而升高。
Anion distributions and phase transitions in CuS1-xSex(x= 0-1), which are isostructural with CuS (covellite), have been studied through the Raman spectroscopic measurements. In hexagonal CuS type structure, there exist two different anion sites (2cand 4esites of the hexagonal space groupP63/mmc), and it has been shown that the selenium atoms occupy the 4esites preferentially in these solid solutions. The temperature dependences of the frequencies of the Raman peaks have also been measured for the seven samples of CuS1-xSexin the temperature range from 300 to 80 K. For each sample except for CuSe, the lowest frequency Raman peak has shown the soft mode behavior, which is considered to be related to the structural phase transition. These results have been discussed referring to those obtained by the X-ray diffraction method. In these solid solutions, the phase transition temperatures rise with increasing selenium contents.