SIGMA-DIBARIUM PYROPHOSPHATE

Authors
ELBELGHITTI AA ELMARZOUKI A BOUKHARI A HOLT EM
Citation
Aa. Elbelghitti et al., SIGMA-DIBARIUM PYROPHOSPHATE, Acta crystallographica. Section C, Crystal structure communications, 51, 1995, pp. 1478-1480
Citations number
28
Categorie Soggetti
Crystallography
Journal title
Acta crystallographica. Section C, Crystal structure communications → ACNP
ISSN journal
01082701
Volume
51
Year of publication
1995
Part
8
Pages
1478 - 1480
Database
ISI
SICI code
0108-2701(1995)51:<1478:SP>2.0.ZU;2-0
Abstract
sigma-Dibarium diphosphate, Ba2P2O7, crystallizes in space group P ($) over bar 62m with the Ba atoms, separated by 4.703 Angstrom, arranged in columns. Ba atoms are in sites of eleven- and tenfold coordination with Ba(1)-O and Ba(2)-O distances in the ranges 2.776(8)-2.869(6) an d 2.878(9)-3.080(9)Angstrom, respectively. One Ba atom has three inter actions with bridging O atoms. P2O7 groups have threefold axes passing through the P atoms. The bridging O atom is disordered about these ax es, with P-O-P angles of 130(1) and 134(4)degrees.