Measured Enthalpy and Derived Thermodynamic Properties of Alpha Beryllium Nitride, Be3N2, from 273 to 1200 K.

The relative enthalpy of a sample of alpha beryllium nitride, Be3N2, of 95 percent purity was precisely measured over the temperature range 273 to 1173 K using a drop calorimetric method. Corrections were applied for the impurities, and the resulting heat capacity-temperature function was required to join smoothly that from recent precise NBS adiabatic calorimetry which covered the range 20 to 315 K. The enthalpy, heat capacity, entropy, and Gibbs free-energy function were computed from empirical functions of temperature and tabulated from 273 to 1200 K.