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ChemInform Abstract: Rb2(Ga4(HPO4)(PO4)4)×0.5 H2O: A New Gallium Phosphate Containing Four-, Five-, and Six-Coordinated Gallium Atoms.

✍ Scribed by K.-H. LII

Publisher: John Wiley and Sons
Year: 2010
Weight: 32 KB
Volume: 28
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199709021

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✦ Synopsis

Rb2(Ga4(HPO4)(PO4)4)•0.5 H2O: A New Gallium Phosphate Containing Four-, Five-, and Six-Coordinated Gallium Atoms.

-Colorless acicular crystals of the novel title compound are prepared by highpressure hydrothermal reaction of RbH2PO4, H3PO4, and Ga2O3 ( molar ratio Rb: P of 0.5, 600 • C, 35000 psi, sealed Au ampoule, 40 h). Structure determination of the compound (monoclinic, P21, Z = 2) by single crystal XRD analysis shows that it consists of a network of corner-sharing Ga-O polyhedra and phosphate tetrahedra forming an open structure containing two types of channels with 8-membered windows. Of the four distinct Ga atoms, one is octahedrally (GaO6), two tetrahedrally (GaO4), and one trigonal bipyramidally coordinated with oxygen (GaO5). In the infinite channels the Rb+ cations and water molecules are located.

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