Читать книгу Solid State Chemistry and its Applications - Anthony R. West - Страница 63

The perovskite structure, with two different‐sized cations and several possible cation charge combinations, occurs with a very wide range of compositions. In addition, defect perovskites form in which there are either cation or anion vacancies. Defects, solid solutions and various kinds of properties are all considered in later chapters. All we wish to note here is the incredible range of properties found in materials with perovskite‐related structure whose composition has been adjusted to optimise a particular property. Almost every physical property imaginable has been found in materials with the perovskite structure by changing their composition and/or defect structure; for this reason, perovskite is sometimes referred to as an inorganic chameleon! A selection of perovskites and their properties is listed in Table 1.19.