Ukrainian Journal of Physical Optics

Number 3, Volume 7, 2006

On the “Forbidden” Ferroelastic Domain Structure in Rb2xTl2(1-x)Cd2(SO4)3 Crystals (x=0.1, 0.2 and 0.3). Optical Microscopic Observations
Say A., Vasylkiv Yu., Girnyk I., Vlokh R.

Institute of Physical Optics, 23 Dragomanov St., 79005 Lviv, Ukraine

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Ferroelastic (FE) domain structure and movement of phase boundaries have been studied in the course of phase transitions in Rb2xTl2(1-x)Cd2(SO4)3 crystals. The reasons for the appearance of so-called “forbidden” domain structure in FE langbeinites have been found. We have shown that two types of conjugated domain walls can appear. In some cases, the phase boundaries could play a part of domain walls.

Key words: ferroelastics, domain structure, “forbidden” walls, langbeinite crystals

PACS: 77.80.Dj , 78.20.Fm

doi 10.3116/16091833/7/3/108/2006

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