Local trigonal distortions of some paramagnetic impurity centers in ZnSiF6 · 6H2O crystal
Local trigonal distortions of some paramagnetic impurity centers in ZnSiF6 · 6H2O crystal
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DOI：
10.1080/10420159708216857
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发表时间：
1997-03
影响因子：
1
通讯作者：
Z. Wen-chen
中科院分区：
文献类型：
--
作者：
Z. Wen-chen
摘要 通过分析ZnSiF6·6H2O晶体中Ni2+、V2+、Mn2+和Co2+离子的零场分裂和g因子（Δg=g⊥−g∥）的各向异性，研究了它们的三角畸变。研究发现，杂质离子八面体环境的三角畸变（压缩或拉长）的符号与杂质有关，即当杂质离子半径大于被取代的Zn2+离子半径时，杂质八面体环境被压缩，而当杂质离子半径小于Zn2+离子半径时，杂质八面体环境被拉长。这一点与同形纯晶体的情况类似，其中顺磁离子是主体离子而不是杂质。
Abstract The trigonal distortions of Ni2+, V2+, Mn2+ and Co2+ ions in ZnSiF6 · 6H2O crystal have been studied by analysing their zero-field splittings and the anisotropy of g factor (characterized by Δg = g ⊥ − g ∥). From the studies, it is found that the sign of trigonal distortion (compression or elongation) of octahedral environment of impurity ion is impurity-dependent, i.e., when the ionic radius of impurity is greater than that of the replaced Zn2+ ion, the octahedral environment of impurity is compressed, whereas if the ionic radius of impurity is smaller than that of Zn2+, it is elongated. This point is similar to the case of isomorphous pure crystal where the paramagnetic ion is the host ion rather than the impurity.