Structure and bonding in solids.

This article will appear in The Encyclopedia of Physical Science and Technology (Academic Press). The subjects covered are: Molecules and Solids, Molecular Crystals, Ionic Crystals and Electronegativity, Covalent Crystals and Directed Valence Bonds, Mixed Covalent and Ionic Bonding, Metallic Bonding, Quantum Structure Diagrams, and Complete Quantum Structural Analysis.