Abstract
The paper presents a new model of bonding for tetrahedrally coordinated binary compounds. The lattices are described as arrangements of closest-packed spherical molecules. The correlation of charge and spin among the valence electrons gives two stable kinds of molecules behaving crystallographically in a different way. They are responsible for either cubic closest packing, hexagonal closest packing or for polytypism. Geometric relations have been derived for the interatomic distances which agree excellently with experimental data. The main consequence of the model is the existence of sigma and pi bonds in the crystal lattice.
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Hausmann, A. Sigma and Pi bonding in tetrahedrally coordinated crystals. Z. Physik B - Condensed Matter 78, 389–396 (1990). https://doi.org/10.1007/BF01313319
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DOI: https://doi.org/10.1007/BF01313319