Axial electron-channelling analysis of perovskite: II. Site identification of Sr, Zr and U impurities
Axial electron-channelling analysis of perovskite: II. Site identification of Sr, Zr and U impurities
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钙钛矿的轴向电子沟道分析：II。
DOI：
10.1080/13642818808201617
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
T. White
中科院分区：
文献类型：
--
作者：
C. Rossouw;P. Turner;T. White
摘要利用近区轴衍射条件下特征X射线发射的取向依赖性(Borrmann效应)，确定了锶、锆和铀杂质在CaTiO_3(钙钛矿)基质结构中的择优位置。由于这些杂质的特征发射线的能量高于或低于钙或钛的K壳层激发，离域效应显然是可测量的，并被用作ALCHEMI分析的工具。结果表明，锶和铀强烈地分配到钙中心，而锆强地分配到钛中心。
Abstract The orientation dependence of characteristic X-ray emission (the Borrmann effect) under near-zone-axis diffraction conditions has been used to identify the site preferences of strontium, zirconium and uranium impurities within a CaTiO3 (perovskite) host structure. As characteristic emission lines from these impurities occur at both higher and lower energies than the calcium or titanium K-shell excitations, effects of delocalization are clearly measureable, and are used as a tool in the ALCHEMI analysis. It is found that strontium and uranium strongly partition into calcium sites, whereas zirconium occupies titanium sites.