The tite compound, lithium pentasodium nonamolybdate, LiNa5Mo9O30, was synthesized by solid-state reaction. The three-dimensional [Mo9O30]6− framework is built up from MoO6 octahedra and MoO5 bipyramids, linked together by edges and corners. The framework delimits two types of intersecting tunnels running along [100] and [010] in which the Na+ and Li+ ions are located. The asymmetric unit contains one Mo, one Na and one Li site located on a twofold rotation axis. The crystal studied was a racemic twin with site a twin ratio of 0.51 (10):0.49 (10). Relationships between the structures of K2Mo3O10, K2Mo4O13, Cs2Mo7O22, Na6Mo10O33 and Na6Mo11O36 compounds are discussed.
Key indicators: single-crystal X-ray study; T = 298 K; mean (Mo-O) = 0.005 Å; disorder in main residue; R factor = 0.030; wR factor = 0.087; data-to-parameter ratio = 12.6.The title compound, sodium disilver arsenatotrimolybdate, Na 0.93 (1) Ag 2.07 (1) Mo 3 AsO 13 , was prepared by a solid-state reaction. In the crystal structure, isolated AsO 4 tetrahedra share corners with groups of three edge-sharing MoO 6 octahedra. This arrangement leads to the formation of anionic ExperimentalCrystal data
The title compound, silver disodium trimolybdenum(VI) nonaoxide arsenate, AgNa2Mo3O9AsO4, was prepared by a solid-state reaction at 808 K. The structure consists of an infinite (Mo3AsO13)n ribbon, parallel to the c axis, composed of AsO4 tetrahedra and MoO6 octahedra sharing edges and corners. The Na and Ag ions partially occupy several independent close positions, with various occupancies, in the inter-ribbon space delimited by the one-dimensional framework. The composition was refined to Ag1.06(1)Na1.94(1)Mo3O9AsO4.
The title mixed-alkali-metal molybdenium oxide, hexakis(lithium/sodium) undecamolybdate, was synthesized by solid-state reaction at 793 K. Its [Mo11O36]6− framework is built up from MoO6 octahedra and MoO5 pyramids linked together by edges and vertices. The framework delimits two types of intersecting tunnels running along [100] and [001], where the sodium and lithium ions are located. Two of the sodium ions and the lithium ion have fractional site occupancies. One of the Mo atoms has site symmetry 2, one sodium ion has site symmetry 2 and one has site symmetry -1, and the Li+ ion has site symmetry 2. Structural relationships between the title compound and the anatase and Na6Mo11O36 structures are discussed.
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