The heat capacity and derived thermophysical properties of some alkaline earth silicates and zirconates from 5 to 1000 K--I. Crystalline SrSiO3 and Sr2SiO4

The heat capacities of SrSO3 and Sr2SiO4 were measured from 5 to 350 K. by adiabatic calorimetry, and the derived thermophysical properties, H[deg], S[deg], and {G[deg] - H[deg] (0)}/T were calculated. For the standard molar entropies at 298.15 K the values (95.65 +/- 0.21) J mol-1 K-1 and (155.44 +/- 0.25) J mol-1 K-1, respectively were found, Enthalpy increments relative to 298.15 K were measured by drop calorimetry for SrSiO3 from 503.0 to 886.4 K and for Sr2SiO4 from 503.0 to 886.2 K.The thermodynamic functions including the formation properties [Delta]HT[deg](t) and [delta]DG[deg](T), were derived for temperatures up to 1000 K.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/30026/1/0000394.pd