A mixed valence vanadium phosphate with a tunnel structure: Rb sub 6 V sub 6 P sub 6 O sub 31

Journal Article · Tue Oct 01 04:00:00 EDT 1991 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1016/0022-4596(91)90192-K· OSTI ID:7274134

Benhamada, L; Grandin, A; Borel, M M; Leclaire, A; Raveau, B ^[1]

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1. Laboratoire CRISMAT-ISMRA, Caen (France)

A new mixed-valence vanadium phosphate Rb{sub 6}V{sub 6}P{sub 6}O{sub 31} has been isolated. Its structure was determined from single-crystal X-ray diffraction data. It crystallizes in the orthorhombic space group Pnma with a = 7.0656(4) {angstrom}, b = 13.4988(8) {angstrom}, c = 14.4198(9) {angstrom}, {upsilon} = 1375.3(2) {angstrom}{sup 3}, Z = 4, R = 0.049, and R{sub w} = 0.052 for 1,058 unique reflections with I > 3{sigma}(I). The three-dimensional framework (V{sub 6}P{sub 6}O{sub 31}){sub {infinity}} can be described by the assemblage of octahedral (VO{sub 3}){sub {infinity}} chains with double chains (V{sub 2}P{sub 2}O{sub 10}){sub {infinity}} built up from single PO{sub 4} tetrahedra and double pyramidal units V{sub 2}O{sub 9}. The cohesion of the framework is achieved by P{sub 2}O{sub 7} groups which share their corners with V{sub 2}O{sub 9} units. This host lattice delimits very large tunnels running along b and five-sided tunnels running along a. The rubidium cations are located at the intersection of these tunnels.

• OSTI ID: 7274134
• Journal Information: Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 94:2; ISSN JSSCB; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
ALKALI METALS
AMMONIUM COMPOUNDS
AMMONIUM PHOSPHATES
BOND ANGLE
BOND LENGTHS
CARBON COMPOUNDS
CARBONATES
CATALYSTS
CATIONS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
DIMENSIONS
ELEMENTS
HYDROCARBONS
IONS
LENGTH
METALS
MOLECULAR STRUCTURE
ORGANIC COMPOUNDS
ORTHORHOMBIC LATTICES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
RUBIDIUM
RUBIDIUM CARBONATES
RUBIDIUM COMPOUNDS
SCATTERING
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
VALENCE
VANADIUM COMPOUNDS
VANADIUM OXIDES
VANADIUM PHOSPHATES
X-RAY DIFFRACTION