SYNTHESIS AND CRYSTAL-STRUCTURE OF A NEW VANADIUM-IV PHOSPHATE - NAVOP5

Authors
BENHAMADA L GRANDIN A BOREL MM LECLAIRE A RAVEAU B
Citation
L. Benhamada et al., SYNTHESIS AND CRYSTAL-STRUCTURE OF A NEW VANADIUM-IV PHOSPHATE - NAVOP5, Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre, 314(6), 1992, pp. 585-589
Citations number
7
Journal title
Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre → ACNP
ISSN journal
07644450
Volume
314
Issue
6
Year of publication
1992
Pages
585 - 589
Database
ISI
SICI code
0764-4450(1992)314:6<585:SACOAN>2.0.ZU;2-1
Abstract
The structure of a new tetravalent phosphate has been determined by si ngle crystal X-ray diffractometry. Although it presents a structure cl ose to that of LiVPO5, this oxide exhibits a different symmetry. Its c ell is monoclinic P2(1)/c, with a = 6.5296(4), b = 8.4643(7), c = 7.12 28(6) angstrom, beta = 115.237(6)-degrees, Z = 4. The host lattice [VP O5] infinity is described as [VO3] infinity octahedral chains linked t ogether through PO4 tetrahedra. The geometry of the octahedral chains is intermediate between that of hexagonal tungsten bronze and ReO3-typ e structure. The relationships with phosphates KVPO5 and Ca0.5Cs2Nb6P3 O24 are discussed.