A STRUCTURAL STUDY OF ALUMINATE SODALITE CA-8[AL12O24](CRO4)(2)(CACR)

Authors
MELZER R DEPMEIER W
Citation
R. Melzer et W. Depmeier, A STRUCTURAL STUDY OF ALUMINATE SODALITE CA-8[AL12O24](CRO4)(2)(CACR), Crystal research and technology, 31(4), 1996, pp. 459-467
Citations number
18
Categorie Soggetti
Crystallography
Journal title
Crystal research and technology → ACNP
ISSN journal
02321300
Volume
31
Issue
4
Year of publication
1996
Pages
459 - 467
Database
ISI
SICI code
0232-1300(1996)31:4<459:ASSOAS>2.0.ZU;2-T
Abstract
The structure of the cubic high temperature phase of Ca-8[Al12O24] (Cr O4)(2), CACr, has been determined at 700 K by Rietveld analysis of neu tron powder diffraction data. The structure is discussed with respect of those of its homologues. The phase transitions of the title compoun d have been investigated by means of synchrotron x-ray powder diffract ion and differential thermo analysis. High precision lattice parameter s have been determined in the temperature range between 350 and 750 K. Three phase transitions occurring at 610 K, 453 K: and 432 K could be verified. Observed anomalies in the lattice parameters versus tempera ture might indicate a yet unknown phase transition at about 555 K. Thi s is supported by results of differential thermo analysis.