This volume aims to explain the basic concepts of crystallography and to discuss the principal modes of study of crystalline solids and the diffraction of X-rays, electrons and neutrons. Some depth of understanding of crystallography and some knowledge of the methods employed in the study of crystalline solids are central to the contemporary study of many of the active areas in chemistry, the earth sciences, materials science and physics, and this book will therefore be of interest to students and researchers in those fields where crystallography applies. A notable feature of the book is the inclusion of problems at the end of each chapter. It is the first volume in the series "Crystalline Solids".