This table lists the liquid density at the melting point, ρm , for elements that are solid at room temperature, as well as for some representative salts of these elements. Densities at higher temperatures (up to the tmax given in the last column) may be estimated from the equation
ρ(t) = ρm – k(t-tm)
where tm is the melting point and k is given in the fifth column of the table. If a value of tmax is not given, the equation should not be used to extrapolate more than about 20°C beyond the melting point.
Data for the elements were selected from the primary literature; the assistance of Gernot Lang in compiling these data is gratefully acknowledged. The molten salt data were derived from Reference 1.