Bulk modulus — volume — ionicity relationship in tetrahedrally bonded semiconductors

It is shown that the bulk modulus of all diamond, zincblende and wurtzite structure compounds can be evaluated by means of the simple relation B = b₀a^−m(1 – g₀f_i) where a is the lattice parameter, f_i the spectroscopically defined bond ionicity and b₀, m and g₀ are constants having the same values for all compounds. This bulk modulus relation is used to estimate the bulk moduli for those zincblende and wurtzite structure compounds for which no experimental measurements have been made until now.