期刊
OPTICS AND SPECTROSCOPY
卷 117, 期 5, 页码 756-758出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0030400X14110216
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The spectral and baric dependences of the birefringence of alpha-LiNH4SO4 crystals are studied. It is found that the birefringence is rather sensitive to uniaxial compressions. A baric shift of the isotropic point to longer or shorter wavelengths depending on the uniaxial compression direction is observed and a generalized temperature-spectral-baric diagram of the isotropic state is plotted. A possibility of the appearance of a pseudoisotropic state under the action of uniaxial pressure sigma (z) or simultaneous pressures sigma (x) = sigma (z) is shown.
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