Evolution of crystallographic phases in (Sr1-xCax)TiO3 with composition (x)

Ranjan, Rajeev ; Pandey, Dhananjai ; Schuddinck, W. ; Richard, O. ; De Meulenaere, P. ; Van Landuyt, J. ; Van Tendeloo, G. (2001) Evolution of crystallographic phases in (Sr1-xCax)TiO3 with composition (x) Journal of Solid State Chemistry, 162 (1). pp. 20-28. ISSN 0022-4596

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00224...

Related URL: http://dx.doi.org/10.1006/jssc.2001.9336

Abstract

Results of X-ray powder diffraction, neutron powder diffraction, electron microdiffraction, and convergent beam electron diffraction (CBED) studies are presented to show that the space group of (Sr1-xCax)TiO3 (SCT) in the composition range 0.35<x≤0.55 cannot be Cmcm. The correct space groups are Pbcm for 0.35<x≤0.40 and Pbnm for 0.40<x≤0.55. The analysis of powder XRD data reveals that the structure of SCT is noncubic for x≥0.06. It is shown that four different types of orthorhombic phases appear in the SCT system with increasing Ca2+ content.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Sr1-xCax)TiO3; Perovskites; Electron Microdiffraction; CBED; Neutron Powder Diffraction; X-ray Powder Diffraction; Antiferroelectrics; Quantum Ferroelectrics; Tilt Transitions
ID Code:27220
Deposited On:10 Dec 2010 12:56
Last Modified:05 Mar 2011 10:01

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