The densities rho of molten salt hydrates C(p)A(q)center dot nH(2)O were obtained from the literature over a range of temperatures. The values of rho and the pertinent isothermal expansibilities alpha(P) and molar volumes at the corresponding temperature of 1.1 times the melting point (T-m/K) are tabulated. The molar volumes of the melts are discussed in terms of the electrostriction of the water.