RIETVELD REFINEMENT OF CA2TISIO6 PEROVSKITE

Authors
LEINENWEBER K PARISE J
Citation
K. Leinenweber et J. Parise, RIETVELD REFINEMENT OF CA2TISIO6 PEROVSKITE, The American mineralogist, 82(5-6), 1997, pp. 475-478
Citations number
12
Categorie Soggetti
Geochemitry & Geophysics",Mineralogy
Journal title
The American mineralogist → ACNP
ISSN journal
0003004X
Volume
82
Issue
5-6
Year of publication
1997
Pages
475 - 478
Database
ISI
SICI code
0003-004X(1997)82:5-6<475:RROCP>2.0.ZU;2-6
Abstract
The structure of the high-pressure cubic double perovskite Ca2TiSiO6 w as refined using synchrotron X-ray powder data [S.G. <Fm(3)over bar m> , a = 7.4105(1) Angstrom, Z = 4]. Ti and Si are fully ordered into alt ernating octahedra in the perovskite framework, with Ca occupying a te trahedrally distorted cuboctahedron. The cation-anion bond lengths are Ti-O = 1.947(3) Angstrom, Si-O = 1.758(3) Angstrom, and Ca-O = 2.622( 1) degrees.