Rare-earth phosphides structural relationships

The crystallochemical peculiarities and structural relationships of the binary and ternary rare-earth phosphides are discussed from the viewpoint of the coordination of the phosphorus atoms. 

Phosphorus CPs in the structures of the binary rare-earth phosphides belong to six groups and the structure types belong to four of 17 groups distinguished by Krypyakevych (1977). The smallest atoms have only a few kinds of coordination polyhedra. The relationship of such a structure to a definite structure group is determined ly the polyhedron with the fewest number of vertices. As one can see from table 17 there is... 

The structure relationships of ternary rare-earth phosphides with metal-to-nonmetal ratio 2 1 are shown in fig. 83. 

Kuz ma and Chykhrij present a systematic and encyclopedic discussion of the phosphides of the binary, ternary and quaternary rare earths. Their coverage includes preparation, phase diagrams, structure, as well as chemical and physical properties. The crystallochemical regularities, the nature of the interaction between components in ternary systems, and structural relationships also constitute important aspects of this review. 

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