Handbook on the Physics and Chemistry of Rare Earths

The first chapter (241) in this volume of the Handbook on the Physics and Chemistry of Rare Earths gives a theoretical overview of the dual nature of 4f states in the lanthanides, which may either be part of the valence states or be inert and form part of the core. First principles theory is supported by relevant experimental data, thus providing a coherent picture of the present state-of-the-art of this fascinating subject. Chapter 242 is a compilation of temperature-dependent data about c...