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Journal of Physical Studies 5(1), 65–69 (2001)
DOI: https://doi.org/10.30970/jps.05.65 THE REFRACTOMETRY OF THE MECHANICALLY STRESSED RbNH4SO4 CRYSTALSV. Yo. Stadnyk, M. O. Romanjuk
Ivan Franko National University of Lviv, Chair of Experimental Physics, |
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The temperature (77-300 К) and spectral (300-700 нм) dependencies of refractive indices $n_i$ of mechanically unstressed and stressed by the pressures along general crystallophysic directions RbNH$_4$SO$_4$ crystals were studied. The refractive indices were observed to dicrease under pressure. The temperature and spectral dependencies of piezooptic constants were investigated. The changes of refraction, electron polarizibility and the position of ultraviolet absorption effective center were calculated. The temperature and spectral dependencies of birefrigence sign inversion of the mechanically unstressed and stressed RbNH$_4$SO$_4$ crystals were analyzed.
PACS number(s): 78.20.Ci, 78.20.H, 61.50.Ks.