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Scheelite-type NaEr(MoO4)2

机译:白钨矿型NaEr(MoO4)2

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Explorations of the A1+–RE3+–Mo6+–O2? (A1+ is an alkali metal cation, RE3+ is a rare-earth metal cation) quaternary systems prepared by the high-temperature solution growth method led to the title structure, sodium erbium bis-(molyb-date), NaEr(MoO4)2. It is isostructural to the scheelite structure (CaWO4) and is composed of [MoO4]2? tetra-hedra with overline{4} symmetry and [(Na/Er)O8]14? polyhedra. The [(Na/Er)O8]14? polyhedron is a distorted tetra-gonal anti-prism, also with overline{4} symmetry, with statistically mixed Na/Er atoms at its centre. There are two sets of Na/Er—O bond lengths [2.420?(4) and 2.435?(3)??], but just one set of Mo—O bond lengths [1.774?(4)??].
机译:探索A1 + –RE3 + –Mo6 + –O2? (A1 +是碱金属阳离子,RE3 +是稀土金属阳离子)通过高温溶液生长方法制备的四元体系,生成标题结构为双-钼酸钠dateNaEr(MoO4)2。它与白钨矿结构(CaWO4)同构,由[MoO4] 2?组成。具有 overline {4}对称和[(Na / Er)O8] 14的四面体?多面体。 [(Na / Er)O8] 14?多面体是扭曲的四角形棱镜,也具有 overline {4}对称性,并且在中心具有统计混合的Na / Er原子。有两组Na / Er-O键长[2.420?(4)和2.435?(3)??],但只有一组Mo-O键长[1.774?(4)??]。

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