Volume 22 of Reviews in Mineralogy is a book exclusively devoted to three minerals: the Al2SiO5
polymorphs - andalusite sillimanite and kyanite. It covers a wide variety of topics that must
be considered in the analysis of metamorphic systems and illustrates the fact that modern
metamorphic petrology demands an awareness of a wide spectrum of geologic variables and
processes. This volume is intended to provide a comprehensive review summarizing the methods
theories and pitfalls of the various contributions on the aluminum silicates. Several sections
of this book present the chronological development of research on various topics giving
readers historical perspectives on the development of theories models and biases on various
problems regarding the aluminum silicates.