Analysis of Rotational–Vibrational Transition Frequencies of the HCl Molecule and Its RKR Potentials in the Ground Electronic State

Oxyhalides Ba₂InO₃F, Ba₂InO₃Cl, and Ba₂InO₃Br are synthesized, and their phase homogeneity is confirmed by the method of X-ray diffraction. The influence of the nature of a halide ion on the crystal-lattice parameters and on the In–O bond lengths is established. The ability of the studied phases to undergo hydration and formation of oxygen–hydrogen groups in their structure is proven.