Dependences of molar volumes in solids, partial molal and hydrated ionic volumes of alkali halides on covalent and ionic radii and the golden ratio

New linear dependences are presented here for the volumes of alkali halides in crystals and in aqueous solutions: (1) the molar volumes in solids ( V B o ) and the partial molal volumes ( ϕ V o ) in aqueous solutions on the sums of crystal ionic volumes, V(M+, X−)cr, (2) ϕ V o on V B o , (3) ϕ V o on the sum of aqueous ionic volumes, V(M+, X−)aq and (4) ϕ V o , V B o , V(M+, X−)cr, V(M+, X−)aq and volume sum of the hydrated ions, ϕ V o ( M + , X - ) h on the sum of atomic volumes V(M, X)cov based on covalent radii. All ionic radii are based on the Golden ratio. The volumes due to electrostriction and ionic hydration have also been estimated.