The heat capacity of two samples of BaCuO2 was measured in a vacuum ad
iabatic calorimeter in the temperature range 8-305 K. The thermodynami
c functions of barium cuprate (entropy, enthalpy, Gibbs free energy) w
ere calculated on the basis of C-p-T dependences. Both samples exhibit
ed an anomalous rise in C-p at low temperatures (below 12 K). Our data
are compared with previously measured data.