First-principles study on the structural, cohesive and electronic properties of rhombohedral Mo2B5 as compared with hexagonal MoB2

The full-potential linearized augmented plane wave method using the generalized gradient approximation (FLAPW–GGA) has been applied to provide comparison and contrast for Mo borides with various structural types: rhombohedral Mo2B5 versus hexagonal MoB2. The equilibrium lattice parameters, energies of formations, total and partial densities of states, electronic density distributions and the theoretical shapes of boron K-edge X-ray emission spectra are obtained and compared to available data.