Crystal Chemistry of RE6MgxCd23-xPb [0.6(1) = x = 3.2(1); RE = La and Ce]. New Mixed-Metal Derivatives of the RE6Cd23T Phases (T = Group 14/15/16 Element)

Desroches Griffen; Ovchinnikov Alexander; Bobev Svilen

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Crystal Chemistry of RE6MgxCd23-xPb [0.6(1) = x = 3.2(1); RE = La and Ce]. New Mixed-Metal Derivatives of the RE6Cd23T Phases (T = Group 14/15/16 Element)

机译：Re6mgxcd23-xpb的晶体化学[0.6（1）= x＆ = 3.2（1）; re = la和ce]。 RE6CD23T阶段的新混合金属衍生物（T =第14/15/16个元素）

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Synthesis and crystal structure determinations are reported for six quaternary phases with the general formula RE6MgxCd23-xPb [RE = La, Ce; 0.6(1) = x = 3.2(1)]. These compounds were prepared by high temperature reactions of the elements in sealed Nb tubes. As revealed by powder and single-crystal X-ray diffraction, their crystal structures are of the cubic Zr6Zn23Si system (cF120, Fm3m, Z = 4), itself an interstitially filled variant of the Th6Mn23 structure type. Rather than distributing equally across the entire Cd-23 sub-structure, Mg displayed a tendency to accumulate at specific sites (most notably 4a); charge differences between sites within the sub-structure, as revealed by computational methods, are the likeliest explanation.

机译：将合成和晶体结构测定报告六个季阶段，通式Re6mgxCd23-XPB [Re = La，Ce; 0.6（1）＆ = x＆ = 3.2（1）]。通过密封的Nb管中的元素的高温反应制备这些化合物。如粉末和单晶X射线衍射所揭示，它们的晶体结构是立方ZR6ZN23SI系统（CF120，FM3M，Z = 4），本身是TH6MN23结构型的无纺粘变体。而不是在整个CD-23子结构上同样分布，MG显示出积聚在特定位点的趋势（最值得注意的是4A）; 通过计算方法揭示的子结构内的站点之间的电荷差异是最糟糕的解释。

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来源
《Zeitschrift fur Anorganische und Allgemeine Chemie》 |2018年第24期|共7页
作者
Desroches Griffen; Ovchinnikov Alexander; Bobev Svilen;
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作者单位

Univ Delaware Dept Chem &

Biochem Newark DE 19716 USA;

Univ Delaware Dept Chem &

Biochem Newark DE 19716 USA;

Univ Delaware Dept Chem &

Biochem Newark DE 19716 USA;

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原文格式 PDF
正文语种 eng
中图分类化学;
关键词
Intermetallic phases; Solid-state structures; Electronic structure; Lanthanides; Cadmium;

机译：金属间相;固态结构;电子结构;镧系;镉;

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1. Crystal Chemistry of RE6MgxCd23-xPb [0.6(1) = x = 3.2(1); RE = La and Ce]. New Mixed-Metal Derivatives of the RE6Cd23T Phases (T = Group 14/15/16 Element) [J] . Desroches Griffen, Ovchinnikov Alexander, Bobev Svilen Zeitschrift fur Anorganische und Allgemeine Chemie . 2018,第24期

机译：Re6mgxcd23-xpb的晶体化学[0.6（1）= x＆ = 3.2（1）; re = la和ce]。 RE6CD23T阶段的新混合金属衍生物（T =第14/15/16个元素）
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Crystal Chemistry of RE6MgxCd23-xPb [0.6(1) = x = 3.2(1); RE = La and Ce]. New Mixed-Metal Derivatives of the RE6Cd23T Phases (T = Group 14/15/16 Element)

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