Shadchin E. A. A three-dimensional model of H-bond and the geometric isotopic effect = Тривимірна модель водневого зв'язку та геометричний ізотопічний ефект / E. A. Shadchin, A. I. Barabash // Укр. фіз. журн. - 2001. - 46, № 10. - С. 1056-1060. - Библиогр.: 11 назв. - англ.
The geometric isotopic effect in hydrogen-containing crystals of the KDP-type is investigated. A mechanism of changes of the hydrogen bonds lengths under the deuteron substitution is proposed. It is shown that (in the framework of the three-dimensional model for hydrogen bonds based on the Einstein approximation for anharmonic oscillators) the correspondence between experimental and theoretical data can be achieved if one takes into account the interactions between the neighboring chains of H-bonds in a crystal.