A few general remarks about homeotect structures

4 A few general remarks about homeotect structures. Other important sets of homeotect structure types are those related to disilicide structure types (MoSi2, CrSi2, etc.), cadmium halide structure types, etc. (See Parthe 1964, Hyde and Anderson 1989), or presented by certain groups of compounds such as rare earth trialuminides (Van Vucht and Buschow 1965). 

The aforementioned papers (Guinier et al. 1984, Zvyagin 1987) also contain suggestions and recommendations on the nomenclature and symbolism for use in the general case of either simple or complex polytypic structures. 

Another method for describing polytypic structures has been suggested by Bokii and Laptev (1994). The polytypic structures, described by means of special unit 

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