Complex alloy structures regarded as sphere packings. II. Analysis and classification of representative structures

The general principles and properties which have been deduced previously (Frank & Kasper, 1958) for the class of alloy structures with triangulated coordination polyhedra are applied in an analysis and classification of representative structures. In the main the analysis is with regard to the nature of layers and how they rpay be stacked and with regard to the nature of the major skeletons. Many hypothetical structures resulting from the analysis are listed and procedures are given for predicting other structure types. The relationship between alloy structures and inert gas hydrates is discussed. * Face-centered cubic. t Hexagonal close-packed.