Anisotropy of the Refractive Indices and Thermal Expansion Coefficients of Rb2ZnCl4 Crystals.

Autor:	Stadnyk, V. Yo., Andrievskii, B. V., Stakhura, V. B., Kogut, Z. A.
Předmět:	REFRACTIVE index THERMAL expansion ANISOTROPY PHASE transitions CRYSTALLOGRAPHY
Zdroj:	Crystallography Reports; Dec2018, Vol. 63 Issue 7, p1167-1172, 6p
Abstrakt:	Abstract: The temperature dependences of the optical path difference ∆і(Т) and relative changes δlі/lі in the thickness of Rb2ZnCl4 crystals have been studied. The temperature dependences of the relative changes in the refractive indices δnі/(nі - 1) are calculated. The critical index of the temperature changes in the refractive indices is estimated to be β = 0.31 ± 0.02, a value that is well consistent with the Landau theory of phase transitions. The coefficients of anisotropy of refractive indices Аn - 1(Т) are calculated. A characteristic minimum near the phase transition temperature is found in these dependences. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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