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On the phase transitions in RbIn(MoO4)2 
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Zapart M. B. and Zapart W.

Abstract. Ferroelastic phase transitions in single crystals of RbIn(MoO4)2 have been studied by means of polarised light microscopy. Investigations of morphology and temperature evolution of domain structures in three ferroelastic phases of RbIn(MoO4)2 have been performed. Orientation of optical indicatrix axes corre-sponding to refractive indices ng and nm has been found and optical birefringence measured in (0001) plane in the temperature range covering all of the ferroelastic phases

Keywords: ferroelastics, domain structure, birefringence, trigonal double molybdates
 

PACS: 62.20.D-, 78.20.Fm, 78.20.Ek
UDC: 535.5, 548
Ukr. J. Phys. Opt. 13 196-203
doi: 10.3116/16091833/13/4/196/2012

Received: 09.09.2012

Анотація. Методом поляризаційної мікроскопії досліджений сегнетоеластичний фазовий перехід в монокристалах RbIn(MoO4)2. Вивчено морфологію і температурну зміну доменної структури у трьох сегнетоеластичних фазах кристалів RbIn(MoO4)2. Визначено орієнтацію осей оптичної індикатриси, які відповідають показникам заломлення ng і nm та виміряне оптичне двозаломлення у напрямку перпендикулярному площині (0001) в температурній області існування всіх сегнетоеластичних фаз.
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