Microscopic Theory of the Structural Stability ofpd-BondedABCompounds

Abstract
The relative stability of the seven most common crystal structures of the pd-bonded AB compounds is examined within a tight-binding model which allows the influence of atomic size, p and d energy-level separation, and band filling to be studied directly. The simple theory, which neglects the valence s electrons, accounts qualitatively for the observed domains of NaCl, CsCl, NiAs, MnP, and boride stability, only the narrow FeSi domain remaining unaccounted for.