Optical birefringence imaging of the phase transition of K2Mn2(SO4)3

The present paper reports on the observation of the optical birefringence as a function of temperature of the langbeinite‐type crystal K2Mn2(SO4)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 ind...

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Bibliographic Details
Published in:Journal of applied crystallography 2003-06, Vol.36 (3-2), p.914-919
Main Authors: Hernández-Rodríguez, C., Geday, M. A., Kreisel, J., Glazer, A. M., Hidalgo-López, A.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Elasticity, elastic constants
Exact sciences and technology
Materials science
Materials testing
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Nondestructive testing: optical methods
optical birefringence
phase transitions
Physics
rotating-polarizer method
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Summary:The present paper reports on the observation of the optical birefringence as a function of temperature of the langbeinite‐type crystal K2Mn2(SO4)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 K2Mn2(SO4)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.
ISSN:1600-5767
0021-8898
1600-5767
DOI:10.1107/S002188980300476X