“…9,10 Moreover, BeO possesses good irradiation resistance and neutron scattering performance, which increase the preference of its application in nuclear reactors. 11,12 In the past several decades, the electronic, optical, and mechanical properties of BeO have been reported in many experimental and theoretical works. 5,6,13−19 Those properties are attributed to the unique structure of BeO, which is the only alkaline-earth oxide crystallizing in the hexagonal wurtzite structure 20 at room temperature, while the other oxides in this family have the rock salt structure.…”