Structure and vibrational spectra of salts of the (VW/sub 5/O/sub 19/)/sup 3/minus// anion. Crystal structure of (N(CH/sub 3/)/sub 4/)/sub 2/(NH/sub 4/)(VW/sub 5/O/sub 19/)
The crystal structure of cubic single crystals of (N(CH/sub 3/)/sub 4/)/sub 2/(NH/sub 4/)(VW/sub 5/O/sub 19/) grown from aqueous solution was solved using three-dimensional diffractometer data (Syntex P2/sub 1/ autodiffractometer, Mo K/alpha/ radiation, 243 reflections) and refined to R = 0.069, space group. Fm3m, a = 13.824(4) /angstrom/, V = 2641.8 /angstrom//sup 3/, Z = 4. The main fragments in the structure are: (a) the isopolyanion M/sub 6/O/sub 19/ (M is a statistical distribution of five W atoms and one V atom), composed of six edge-sharing octahedra of oxygens; (b) the NH/sub 4/ group, situated inside an octahedron contacting the six surrounding isopolyanions of M/sub 6/O/sub 19/ through terminal oxygens; and (c) the tetramethylammonium ion, N(CH/sub 3/)/sub 4//sup +/, situated in the center of a multifaced polyhedron. The M/sub 6/O/sub 19/ ions and NH/sub 4/ octahedra form a three-dimensional framework. The N(CH/sub 3/)/sub 4//sup +/ ions are located in the center of large voids. The vibrational spectra (IR and laser Raman) of the compound were investigated. The possibility of using IR spectra for the identification of mixed sixth-order isopolyanions in various salts was demonstrated.
- OSTI ID:
- 6050498
- Journal Information:
- J. Struct. Chem. (Engl. Transl.); (United States), Journal Name: J. Struct. Chem. (Engl. Transl.); (United States) Vol. 29:3; ISSN JSTCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360602* -- Other Materials-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
ANIONS
CATIONS
CHARGED PARTICLES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
CRYSTALS
CUBIC LATTICES
DIFFRACTION
DIFFRACTION METHODS
ENERGY LEVELS
EXCITED STATES
INFRARED SPECTRA
IONS
LATTICE PARAMETERS
LAUE METHOD
MONOCRYSTALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PRECESSION
RAMAN SPECTRA
SCATTERING
SODIUM COMPOUNDS
SPACE GROUPS
SPECTRA
STRUCTURAL CHEMICAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS
TUNGSTATES
VANADATES
VANADIUM COMPOUNDS
VIBRATIONAL STATES
X-RAY DIFFRACTION