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


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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.

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V. Stadnyk

Lviv National University

编辑信件的主要联系方式.
Email: vasylstadnyk@ukr.net
乌克兰, Lviv, 79005

B. Andrievskii

Koszalin University of Technology

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Email: bohdan.andriyevskyy@tu.koszalin.pl
波兰, Koszalin, 75-453

V. Stakhura

Lviv National University

Email: bohdan.andriyevskyy@tu.koszalin.pl
乌克兰, Lviv, 79005

Z. Kogut

National University Lviv Polytechnica

Email: bohdan.andriyevskyy@tu.koszalin.pl
乌克兰, Lviv, 79013

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