The monograph is devoted to complex diamond-like semiconductors, many of which have found wide application in electronics in recent years. The book contains the results of research by the author and his collaborators in the field of chemistry of diamond-like semiconductors, and also reflects the work of other scientists. Extensive experimental material on the physical and physicochemical properties of multicomponent tetrahedral phases is summarized and systematized in accordance with the classification given at the beginning of the book...