Formation ability of the perovskite-type structure in Li x Na 1 - x MgH 3 ( x = 0, 0.5 and 1.0)
Formation ability of the perovskite-type structure in Li x Na 1 - x MgH 3 ( x = 0, 0.5 and 1.0)
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DOI：
10.1016/j.actamat.2005.04.001
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发表时间：
2005-07
影响因子：
3.6
通讯作者：
K. Ikeda;Y. Nakamori;S. Orimo
中科院分区：
文献类型：
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作者：
K. Ikeda;Y. Nakamori;S. Orimo
本研究通过实验研究了 x=0、0.5 和 1.0 时 LixNa1−xMgH3 中钙钛矿型结构的形成能力。首次仅通过机械球磨成功合成了钙钛矿型结构的NaMgH3(x=0)。由于中间组合物(x=0.5)中Na被Li部分取代，对应于该结构的衍射峰向更高角度移动，而LiMgH3(x=1.0)中没有钙钛矿结构的证据。从Goldschmidt容差因子描述的离子几何限制的角度可以合理地解释实验结果。
Formation ability of the perovskite-type structure in LixNa1−xMgH3with x=0, 0.5 and 1.0 was investigated experimentally in this study. NaMgH3(x=0) with the perovskite-type structure was successfully synthesised for the first time by mechanical milling alone. The diffraction peaks corresponding to the structure shift to higher angles due to the partial substitution of Na by Li in the intermediate composition (x=0.5), while there is no evidence of the perovskite structure in LiMgH3(x=1.0). The experimental results can be reasonably explained from the viewpoint of the geometric restrictions on ions that are described by the Goldschmidt tolerance factors.