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Inorganic Solids: an Introduction to Concepts in Solid-State Structural Chemistry

It is not many years since the mineralogist could, with considerable justice, have characterized the solid-state physicist as a peculiar fellow who devoted infinite time to the study of simple binary cubic crystals containing infinitesimal amounts of impurity, while ignoring the rest of the crystalline creation, and foregoing the delights of 'dirty' crystals (i.e. solid solutions), and other highly 'imperfect' crystals. The solidstate physicist might in turn have regarded those-studying triclinic multicomponent solid solutions as unbalanced, or at least as engaged in an unrewarding enterprise capable of yielding only superficial results. This gap in attitude and interests is now narrowing rapidly, raising the problem of finding textbooks of solid-state physics suited to use by undergraduate and postgraduate mineralogists. Elliott and Gibson begin with a brief (27 pp.) discussion o f crystal structures, including sections on bonding and on diffraction by crystals. This is not sufficiently detailed to replace the texts in current use. The chapters on excitations, lattice vibrations, and electrons in bands are useful, and offer insights into these subjects which are not easily obtained from other books. Chapter 5 deals with imperfections, but pays little attention to the mineralogically important cases of crystals with high dislocation densities, or high impurity contents, and like Chapter 6 (optical properties of solids) concentrates attention on semiconductors rather than ionic solids. Chapter 7 deals with the properties of free carriers, and has relevance to the deep mantle and core. Chapter 8 (Transport) covers electrical and thermal conduction and related properties, and sections 8. I to 8.8 should be of considerable interest to mineralogists. Devices are covered in Chapter 9, and magnetic properties in Chapter IO, which contains much interesting material. From the mineralogist's viewpoint, the book suffers from an emphasis on semiconductor properties and perfect crystals, and the relative neglect of imperfect ionic crystals, which makes it difficult to recommend as a teaching text. Despite this, there is much to be gained by browsing through Chapters 2 to 8, and Chapter IO, which give readers a view of the subject usefully different from those in Kittel and Dekker. The book is well produced, with abundant illustrations of excellent quality, and is very reasonably priced by current standards. R . G . J . STRENS