Author/Authors :
Adamkovicova، نويسنده , , Katarيna and Nerad، نويسنده , , Ivan and Kosa، نويسنده , , Ladislav and Liska، نويسنده , , Marek and Strecko، نويسنده , , Jozef and Proks، نويسنده , , Ivo، نويسنده ,
Abstract :
Relative enthalpies of the Ca2MgSi2O7CaSiO3 system melts have been measured by combination of high-temperature drop calorimetry and solution calorimetry of the same sample in the temperature interval 1760–1930 K. From these results, the relative enthalpy-temperature-composition relation has been found by regression analysis. The enthalpy of mixing of melts is zero at any composition within the experimental errors of measurement. The heat capacities of melts do not depend on temperature and are a linear function of composition. They are discussed with values calculated employing Stebbins et al.ʹs, Richet and Bottingaʹs, and Lange and Navrotskyʹs models.
