Birefringence Properties of Uniaxially Compressed K2SO4 Crystals
DOI:
https://doi.org/10.15407/ujpe58.09.0853Keywords:
birefringence, uniaxial press, phase transitionAbstract
The influence of the uniaxial mechanical pressure om < 200 bar on the temperature dependence of the birefringence Δni in K2SO4 crystals in an interval of 300–1000 K has been studied. The uniaxial pressure was found to affect only the magnitude but not the behavior of dΔni=dT. A significant baric shift of the ferroelastic phase transition point toward higher (for ox) and lower (for oy and oz pressures) temperatures was observed, as well as a baric shift of the temperature interval, where the intermediate phase exists, near the phase transition point.
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