Reinvestigation of the structure of BaCuSi(2)O(6) -- evidence for a phase transition at high temperature.
Reinvestigation of the structure of BaCuSi(2)O(6) -- evidence for a phase transition at high temperature.
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BaCuSi(2)O(6) 结构的重新研究——高温相变的证据。
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
G. Roth
中科院分区：
文献类型：
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作者：
K. Sparta;G. Roth
在BaCuSi（2）O（6）的室温X射线衍射图中观察到超结构反射。与Finger等人确定的原始结构相比，四元结构具有四倍的晶胞体积。在T（s）= 610 K时，BaCuSi（2）O（6）发生结构相变，超结构反射消失。在较大单元中的结构描述消除了在原始结构中观察到的晶体化学不一致性。
Superstructure reflections have been observed in the room-temperature X-ray diffraction pattern of BaCuSi(2)O(6), barium copper disilicate. The tetragonal structure has a fourfold unit-cell volume compared with the original structure determined by Finger et al. At T(s) = 610 K BaCuSi(2)O(6) undergoes a structural phase transition upon which the superstructure reflections disappear. The description of the structure in the larger cell removes the crystal-chemical inconsistencies observed for the original structure.