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首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >Structure cristalline de type alluaudite K0.4Na3.6Co(MoO4)3
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Structure cristalline de type alluaudite K0.4Na3.6Co(MoO4)3

机译：钙铝石型K0.4Na3.6Co（MoO4）3的晶体结构

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摘要

A new triple molybdate, potassium sodium cobalt tris­(molybdate), K0.4Na3.6Co(MoO4)3, was synthesized using solid-state reactions. The Co2+ and one Na+ cation are located at the same general site, each with occupancy 0.5. Another site (site symmetry 2) is occupied by Na+ and K+ cations, with occupancies of 0.597 (7) and 0.402 (6), respectively. The other two Na+ cations and one of the two Mo atoms lie on special positions (site symmetries -1, 2 and 2, respectively). The structure is characterized by M2O10 (M = Co/Na) dimers, which are linked by MoO4 tetra­hedra, forming infinite layers. The latter are connected firstly by insertion of one type of MoO4 tetra­hedra and secondly by sharing corners with the other type of MoO4 tetra­hedra. This results in an open three-dimensional framework with the cavities occupied by the Na+ and K+ cations. The structure is isotypic with Na3In2As3O12 and Na3In2P3O12. A comparison is made with structures such as K2Co2(MoO4)3 and β-NaFe2(MoO4)3 and their differences are discussed.
机译：利用固态反应合成了一种新的三钼酸钾三钴钾钠（K0.4Na3.6Co（MoO4）3）。 Co2 +和一个Na +阳离子位于相同的一般位点，每个元素的占有率为0.5。另一个位点（位点对称性2）由Na +和K +阳离子占据，分别占0.597（7）和0.402（6）。其他两个Na +阳离子和两个Mo原子之一位于特殊位置（位置对称分别为-1、2和2）。该结构的特征是M2O10（M = Co / Na）二聚体，它们通过MoO4四面体连接在一起，形成无限层。后者首先通过插入一种MoO4四面体进行连接，其次通过与另一种MoO4四面体共享转角。这导致了一个开放的三维框架，其中的空穴被Na +和K +阳离子占据。该结构与Na3In2As3O12和Na3In2P3O12同型。比较了诸如K2Co2（MoO4）3和β-NaFe2（MoO4）3之类的结构，并讨论了它们之间的差异。

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