Enthalpy, heat capacity, second-order transitions and enthalpyof fusion of Li4SiO4 by high-temperature calorimetry

摘要: Abstract The enthalpy of Li 4 SiO was obtained between 363 and 1300 K using isothermal drop calorimetry. Anisothermal calorimetry used for the identification two second-order transitions measurement fusion. smoothed 298 results in H °( T ) − °(298) 17156 + 73.694 0.103210 2 4163115 −1 J mol . heat capacity derived by differentiation. value extrapolated to is C p ,298 = 182.1 critical temperatures are c1 938 c2 996 K. fusion Δ fus 53 kJ at melting temperature m 1531 An isotope effect 6 enrichment on could not be discerned.