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Optical birefringence imaging of the phase transition of K 2 Mn 2 (SO 4 ) 3
Author(s) -
HernándezRodríguez C.,
Geday M. A.,
Kreisel J.,
Glazer A. M.,
HidalgoLópez A.
Publication year - 2003
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s002188980300476x
Subject(s) - birefringence , polarizer , anisotropy , phase transition , crystal (programming language) , phase (matter) , optics , optical anisotropy , materials science , domain (mathematical analysis) , optical axis , condensed matter physics , crystallography , chemistry , physics , lens (geology) , mathematical analysis , mathematics , organic chemistry , computer science , programming language
The present paper reports on the observation of the optical birefringence as a function of temperature of the langbeinite‐type crystal K 2 Mn 2 (SO 4 ) 3 by using an imaging version of the so‐called rotating‐polarizer method. This method provides separate moving images of the orientation of the optical indicatrix and the magnitude of the optical anisotropy, showing the domain‐wall behaviour during temperature changes. Some new results on the domain behaviour of the phase transition of K 2 Mn 2 (SO 4 ) 3 have been obtained. It is concluded that the sample single crystal consists of local regions, indicating the coexistence of two phases in this langbeinite‐type crystal.