A novel niobium phosphate bronze with a tunnel structure, K sub 3 Nb sub 6 P sub 4 O sub 26 , member n = infinity of the series (K sub 3 Nb sub 6 P sub 4 O sub 26 ) n ter dot KNb sub 2 PO sub 8

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Journal of Solid State Chemistry; (USA)

DOI:https://doi.org/10.1016/0022-4596(90)90334-T· OSTI ID:7198971

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

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1. Universite de Caen (France)

A new niobium phosphate bronze with a tunnel structure K{sub 3}Nb{sub 6}P{sub 4}O{sub 26} has been synthesized and its structure has been determined from a single crystal by X-ray diffraction. It crystallizes in the space group Pnma with a = 14.7484(9) {angstrom}, b = 31.582(2) {angstrom}, c = 9.3859(6) {angstrom}. Its structure consists of (Nb{sub 3}P{sub 2}O{sub 13}){infinity} layers sharing the corners of their NbO{sub 6} octahedra and PO{sub 4} tetrahedra. The geometry of those layers derives from the hexagonal tungsten bronze and is compared to that of K{sub 7}Nb{sub 14}P{sub 9}O{sub 60}. This oxide represents the member n = {infinity} of the structural family (K{sub 3}Nb{sub 6}P{sub 9}O{sub 26}){sub n} {center dot} KNb{sub 2}PO{sub 8}, whereas K{sub 7}Nb{sub 14}P{sub 9}O{sub 60} previously described corresponds to n = 2.

• OSTI ID: 7198971
• Journal Information: Journal of Solid State Chemistry; (USA), Journal Name: Journal of Solid State Chemistry; (USA) Vol. 84:2; ISSN 0022-4596; ISSN JSSCB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
BRONZE
CALCULATION METHODS
COPPER ALLOYS
COPPER BASE ALLOYS
CRYSTAL STRUCTURE
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
NIOBIUM COMPOUNDS
NIOBIUM PHOSPHATES
NUMERICAL DATA
OXYGEN COMPOUNDS
PHASE STUDIES
PHOSPHATES
PHOSPHORUS COMPOUNDS
REFRACTORY METAL COMPOUNDS
SYNTHESIS
TIN ALLOYS
TRANSITION ELEMENT COMPOUNDS