Preface. Symmetric Relationships between Crystal Structures and their Practical Applications; G.C. Chapuis. Cluster Solid State Chemistry: A Frontier Discipline Between Metallurgy and Molecular Chemistry; R. Chevrel. Structural and Bonding Principles in Metal Halide Cluster Chemistry; J.D. Corbett. Modern Concepts of Atom Coordinations, Atom Volume and Charge Transfer in Intermetallic Compounds; M.L. Fornasini. The Intergrowth Concept as a Useful Tool to Interpret and Understand Complicated Intermetallic Structures; Y.N. Grin. Introduction to the Electronic Structure of Extended Systems; R. Hoffmann. Crystal Chemical Formulae for Inorganic Structure Types; J. Lima-de-Faria. Crystal Chemistry of Complex Sulfides (Sulfosalts and its Chemical Application; E. Makovicky. The Bond Valence Method in Crystal Chemistry; M. O'Keeffe. Valence Electron Rules for Compounds with Tetrahedral Structures and Anionic Tetrahedron Complexes; E. Parthé. Structural Principles of Silicates, Photospates, Sulphates and Related Structures; D.Y. Pushcharovsky. Crystal Chemistry of High Tc Superconducting Oxides; B. Raveau, C. Michel, M. Hervieu. Competition Between Trigonal Prisms and other Coordination Polyhedra in Borides, Carbides, Silicides and Phosphides; P. Rogi. Index.