Compounds with multiple anions provide a new materials platform, bringing a new degree of freedom for designing materials. Mixed-anion compounds have seen a recent resurgence in interest owing to their intriguing properties for a wide variety of applications. The purpose of this book is a systematic description of the science of mixed-anion compounds with a comprehensive description of synthesis, analysis, applications, and computational science related to mixed-anion compounds. The book will be of particular interest to postgraduate students and researchers in inorganic solid-state chemistry, computational science and the synthesis, analysis and application of mixed-anion compounds.