The thermodynamic properties of novel boron pnictides have been calculated from the phonon frequencies using the statistical thermodynamic approach on a high-precision sampling mesh in the Brillouin zone. The temperature dependencies of heat capacity at constant volume (C v ) and entropy (S) of crb C 8 and BX are shown in Fig. in comparison with available experimental C p data for diamond and zinc-blende BN , BP and BAs . The observed excellent agreement between the calculated and experimental data for zb-BX indicates the validity of the method used to estimate the thermodynamic properties in the case of boron pnictides. For all three boron pnictides, the heat capacity and entropy of crb phases are slightly higher than those of zb-BX, which is expected for more open crb structures compared to the ideal zinc-blende structure.