Thermochemical and thermophysical data for several oxides and silicates are assessed and refined from the available data on Cp (heat capacity at constant pressure), thermal expansion (α), and compressibility (β) from the relation: Cp=Cv+α2VTT/βT, where Cv (heat capacity at constant volume) at low-temperatures is modeled from Kieffer's (1979a, b, c) model. For five minerals, periclase, forsterite, pyrope, lime, and corundum, high temperature data are available and a comparison between the available and assessed data shows a good match. The available data on thermal expansion, and bulk modulus, the calculated and assessed Cv data on 44 oxides and silicates are made internally consistent satisfying the above relationship between the heat capacity at constant pressure and at constant volume, thermal expansion and bulk modulus. These data are useful in phase equilibrium computations. ¿ American Geophysical Union 19