A niobium phosphate bronze closely related to the tungsten phosphate bronzes family: Na sub 4 Nb sub 8 P sub 6 O sub 35

Journal Article · Wed Oct 31 23:00:00 EST 1990 · Journal of Solid State Chemistry; (USA)

DOI:https://doi.org/10.1016/0022-4596(90)90295-9· OSTI ID:5943568

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

---

1. Universite de Caen (France)

A new niobium phosphate bronze Na{sub 4}Nb{sub 8}P{sub 6}O{sub 35} has been isolated. Its structure was solved by single crystal x-ray diffraction. It crystallizes in the orthorhombic system with the space group Pbam. The cell parameters are a = 8.4992(7) {angstrom}, b = 15.3390(8) {angstrom}, and c = 10.5913(9) {angstrom}. The framework (Nb{sub 8}P{sub 6}O{sub 35}){sub {infinity}} consists of (Nb{sub 3}P{sub 2}O{sub 17}){sub {infinity}} layers, sharing the corners of their octahedra and forming (Nb{sub 6}P{sub 4}O{sub 31}){sub {infinity}} bilayers. The latter bilayers are linked along {rvec c} through (Nb{sub 2}P{sub 2}O{sub 14}) units, built up themselves of two edge-sharing NbO{sub 6} octahedra connected to two PO{sub 4} tetrahedra. The relationships with other niobium phosphate bronzes is also discussed as well as the great distortion of the different polyhedra of the structure.

• OSTI ID: 5943568
• Journal Information: Journal of Solid State Chemistry; (USA), Journal Name: Journal of Solid State Chemistry; (USA) Vol. 89:1; ISSN JSSCB; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
EXPERIMENTAL DATA
INFORMATION
LATTICE PARAMETERS
MEASURING METHODS
NIOBIUM COMPOUNDS
NIOBIUM PHOSPHATES
NUMERICAL DATA
ORTHORHOMBIC LATTICES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
REFRACTORY METAL COMPOUNDS
SCATTERING
SODIUM COMPOUNDS
SODIUM PHOSPHATES
SPACE GROUPS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION