Twin model for orthorhombic perovskites

2001/03/30 by Bas B. Van Aken, Auke Meetsma, Van Aken, Bas B. +4
Chemistry · Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Chemistry #Condensed Matter (cond-mat) #Condensed matter physics #Crystal Structures and Properties #Crystal structure #Crystal twinning #Crystallography #Diffraction #FOS: Physical sciences #Geometry #Lattice (music) #Macle #Materials science #Mathematics #Microstructure #Optics #Orthorhombic crystal system #Perpendicular #Physics #Solid-state spectroscopy and crystallography #cond-mat

paper · pdf · doi:10.48550/arxiv.cond-mat/0103628

8 pages, including 4 figures

arxiv created 2001/03/30 · openalex publication_date 2001/03/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present a detailed single crystal x-ray diffraction study of twinned orthorhombic perovskites. The diffraction pattern can be indexed on a 2a_px2a_px2a_p lattice, but does not obey cubic symmetry relations. The data can be modelled in space group Pnma with a twin based on a distribution of the b axis over three perpendicular cubic axes. This model allows full structure determination in the presence of up to six twin fractions from single crystal x-ray diffraction data.

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