The structural properties of concentrated aqueous solutions of lithium bromide and iodide at low temperatures

The method of integral equations was used to study the special features of the structure of aqueous solutions of LiBr - 5H(2)O and LiI - 5H(2)O in the temperature range 298-243 K. It was shown that, at low temperatures, tetrahedral ordering of solvent molecules increased and the number of interactions between free solvent water molecules slightly grew. Temperature lowering also caused an increase in the degree of structuring of solvent molecules around cations, whereas H-bonds were preferably formed between water molecules and anions. Direct Li+-An(-) correlations were virtually absent in the systems at low temperatures. Conversely, the probability of the formation of Li+ H2O-An(-) ion-water chains increased as temperature lowered.