Birefringence Properties of Uniaxially Compressed K2SO4 Crystals

  • V. Yo. Stadnyk Ivan Franko National University of L’viv
  • O. Z. Kashuba Ivan Franko National University of L’viv
  • R. S. Brezvin Ivan Franko National University of L’viv
  • I. M. Matviishyn Ivan Franko National University of L’viv
  • M. Y. Rudysh Ivan Franko National University of L’viv
Keywords: birefringence, uniaxial press, phase transition

Abstract

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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Published
2018-10-11
How to Cite
Stadnyk, V., Kashuba, O., Brezvin, R., Matviishyn, I., & Rudysh, M. (2018). Birefringence Properties of Uniaxially Compressed K2SO4 Crystals. Ukrainian Journal of Physics, 58(9), 853. https://doi.org/10.15407/ujpe58.09.0853
Section
Solid matter