A PHOSPHONIOBATE WITH AN INTERSECTING TUNNEL STRUCTURE RELATED TO PYROCHLORE - RB3NB5P2O19

Authors
LECLAIRE A BOREL MM CHARDON J RAVEAU B
Citation
A. Leclaire et al., A PHOSPHONIOBATE WITH AN INTERSECTING TUNNEL STRUCTURE RELATED TO PYROCHLORE - RB3NB5P2O19, Journal of solid state chemistry, 111(1), 1994, pp. 26-32
Citations number
10
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Physical
Journal title
Journal of solid state chemistry → ACNP
ISSN journal
00224596
Volume
111
Issue
1
Year of publication
1994
Pages
26 - 32
Database
ISI
SICI code
0022-4596(1994)111:1<26:APWAIT>2.0.ZU;2-D
Abstract
A new phosphoniobate Rb3Nb5P2O19 with an intersecting tunnel structure has been synthesized. It crystallizes in the R3cBAR space group with a(H) = 12.989(2) angstrom and c(H) = 53.912(6) angstrom. The host latt ice, related to the pyrochlore framework, is built up from ''Nb6O27'' and ''Nb3P3O24'' units which share their corners in the (001) planes, forming [Nb2PO8]infinity layers. These layers, connected through NbO6 octahedra, delimit large cages along c which contain the rubidium ions . The cages are connected through hexagonal tunnels running along [210 ]H. The relationships with pyrochlore and Rb10Nb29.2O78 are studied. ( C) 1994 Academic Press, Inc.