钼酸二钠砷酸七钠
Na2MoO2As2O7.
作者信息
Jouini Raja, Zid Mohamed Faouzi, Driss Ahmed
机构信息
Laboratoire de Matériaux et Cristallochimie, Faculté des Sciences de Tunis, Université de Tunis ElManar, 2092 ElManar II Tunis, Tunisia.
出版信息
Acta Crystallogr Sect E Struct Rep Online. 2012 Dec 1;68(Pt 12):i93. doi: 10.1107/S1600536812048167. Epub 2012 Nov 30.
Disodium molybdenum dioxide diarsenate, Na2MoO2As2O7, has been synthesized by a solid-state reaction. The structure is built up from MoAs2O12 linear units sharing corners to form a three-dimensional framework containing tunnels running along the a-axis direction in which the Na(+) cations are located. In this framework, the As(V) atoms are tetra-hedrally coordinated and form an As2O7 group. The Mo(VI) atom is displaced from the center of an octa-hedron of O atoms. Two Na(+) cations are disordered about inversion centres. Structural relationships between different compounds: A2MoO2As2O7 (A = K, Rb), AMOP2O7 (A = Na, K, Rb; M = Mo, Nb) and MoP2O7 are discussed.
二砷酸二氧钼酸钠（Na2MoO2As2O7）已通过固态反应合成。其结构由MoAs2O12线性单元通过共享角形成三维框架构成，该框架包含沿a轴方向延伸的隧道，Na(+)阳离子位于其中。在这个框架中，As(V)原子呈四面体配位并形成As2O7基团。Mo(VI)原子偏离O原子八面体的中心。两个Na(+)阳离子在反演中心处无序排列。讨论了不同化合物A2MoO2As2O7（A = K、Rb）、AMOP2O7（A = Na、K、Rb；M = Mo、Nb）和MoP2O7之间的结构关系。
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