Structural change in Li1-xVO2(x≃0.2) single crystals
Structural change in Li1-xVO2(x≃0.2) single crystals
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Li1-xVO2(x≃0.2)单晶的结构变化
DOI：
10.1006/jssc.1993.1032
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发表时间：
1993
影响因子：
5.4
通讯作者：
H. Takei
中科院分区：
文献类型：
--
作者：
Katsuhiro Imai;M. Koike;H. Sawa;H. Takei
用助熔剂法生长的Li0.8VO2单晶样品研究了500K附近的相变。单晶X射线衍射结果表明，室温下沿α 00 · 1 π方向延伸的明显超结构条纹在500 K以上加热时消失，结构变为理想的“有序岩盐”型α NaFeO2。相变在加热和冷却循环期间可逆地发生。还观察到部分分解成尖晶石相。
Abstract The phase transition around 500 K of Li 0.8 VO 2 has been studied using single-crystal specimens grown by the flux method. Single-crystal X-ray diffraction reveals that the marked superstructure streaks elongated in the 〈00 · 1〉 direction at room temperature disappear on heating above 500 K, and that the structure becomes an ideal "ordered rock salt" type of α-NaFeO 2 . The phase change occurs reversibly during heating and cooling cycles. Partial decomposition into a spinel phase is also observed.