Na/sub x/P/sub 4/W/sub 14/O/sub 50/: the sodium m = 7 member of the monophosphate tungsten bronze series A/sub x/(PO/sub 2/)/sub 4/(WO/sub 3/)/sub 2m/

Journal Article · Thu Jan 01 04:00:00 EST 1987 · J. Solid State Chem.; (United States)

DOI:https://doi.org/10.1016/0022-4596(87)90221-0· OSTI ID:6948283

Lamire, M; Goreaud, L M; Raveau, B

The structure of Na/sub 1.7/P/sub 4/W/sub 14/O/sub 50/ was established by single crystal X-ray analysis. The compound is the m = 7 member of the family of monophosphate tungsten bronzes with hexagonal tunnels, Na/sub x/(PO/sub 2/)/sub 4/ (WO/sub 3/)/sub 2m/, characterized by ReO/sub 3/-type slabs of various widths connected through PO/sub 4/ tetrahedra. In order to compare with other members of the MPTB/sub h/ family, a cell symmetry Al has been chosen with a = 6.575(2), b = 5.304(1), c = 27.076(3) A, ..cap alpha.. = 89.62(1), ..beta.. = 96.17(1), and ..gamma.. = 90.26(1)/sup 0/. The refinement has led to R = 0.040 and R/sub w/ = 0.036 for 6634 reflections with sigma(I)/I less than or equal to 0.333. A comparative study is carried out concerning the behavior of the alkaline ions in that sort of framework and especially their coordination state in the O/sub 18/ cages.

• Research Organization: Universite de Caen, France
• OSTI ID: 6948283
• Journal Information: J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 66:1; ISSN JSSCB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DATA
DIFFRACTION
EXPERIMENTAL DATA
INFORMATION
LATTICE PARAMETERS
MONOCRYSTALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
PHOSPHORUS OXIDES
REFRACTORY METAL COMPOUNDS
SCATTERING
SODIUM COMPOUNDS
SPACE GROUPS
TRANSITION ELEMENT COMPOUNDS
TRICLINIC LATTICES
TUNGSTEN COMPOUNDS
TUNGSTEN OXIDES
X-RAY DIFFRACTION