"Materials Thermochemistry", the 6th edition of "Metallurgical Thermochemistry" aims to demonstrate the central role of thermochemistry in the understanding and designing of materials and materials processes. Revised and updated, this edition includes recent developments in experimental methods, methods for estimating thermochemical data for both pure and alloy substances, practical applications of thermochemical calculations, and updated tables of critically evaluated thermochemical data for inorganic substances and binary alloy systems. The basic principles of chemical thermodynamics are presented, with many examples of the use of thermochemical calculations in solving a variety of materials' problems. Although thermodynamics is an established field, this edition presents recent experimental methods and calculations of complex equilibria associated with recent materials and environmental considerations, such as environmental pollution. This text is suitable for graduates and undergraduates, and provides basic information necessary for researchers to apply thermochemical principles and data to the optimization of materials and materials processes.