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 00:00:00 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), Vol. 84:2; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

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