Abstract
The measurements of crystal lattice parameters (a) of solid solutions being formed in the system KClKBrH2O at 298 K were conducted. The volumes (v) of unit cells and the densities (ϱ) of mixed crystals K(Cl, Br) were calculated. It was confirmed that in the investigated system continuous solid solutions were formed. The lattice parameters of these crystals formed from aqueous solutions of salts as well as from molten salts and also calculated by Durham‐Hawkins method were nearly identic.