It should be noted that the bulk modulus of zb-BAs calculated from the elastic constants (134 GPa) is ~10% smaller than the experimental values obtained by synchrotron X-ray diffraction study (148(6) GPa ) and picosecond interferometry (148(9) GPa ). On the other hand, the B 0 value of 146 GPa calculated in the framework of the thermodynamic model is in perfect agreement with the experimental data. For this reason, the bulk modulus values obtained using the thermodynamic model (see Table ) should be preferred also for all other pnictides.