Andriyevsky, B.V.; Czapla, Z.; Dacko, S.; Myshchyshyn, O.Ya.
(Condensed Matter Physics, 1999)
Temperature dependences of the optical path difference by the variable
part of refractive index D = (n − 1)l and the components ε′ and ε′′ of complex dielectric permittivity for NH₄HSeO₄ single crystal are studied in ...