MonoChalcogenides, cerium

Region III is rich in cubic compounds and practically all of them are formed with p elements. Cerium monopictinides and monochalcogenides have the NaCl structure and CeXj (with X = In, Tl, Pb) the AuCus structure, all of them face-centered cubic (fee) type. CeBg has the CaBg structure, which is simple cubic and is closely related to the CsCl structure, whereby the Bg octahedra occupy the Cl positions. 

Subsequent to the discussion of the intermetallic compounds we give a description of the transport properties of cerium monopnictides and monochalcogenides, which are compared with various actinide monopnictide and monochalcogenide systems. In these compoimds, which partly show a seraimetal-like behaviour, a great and... 

Much less efforts have been put in the study of the cerium monochalcogenides CeY (Y = S, Se and Te), since they were considered as rare examples of cerium compounds with normal behaviour. However, the first resistivity measurements on CeS (Schoenes and Hulliger 1985) displayed a temperature dependence similar to that found in CeAl2- This prompted a more systematic investigation of the electrical resistivity of CeS, CeSe and CeTe on single crystals in a large temperature region (2 to 1000 K). 

Multi-Ar structures exist in many compounds and solid solutions. They do not, apparently, exist in isostructural Ce monopnictides, but they may exist in the cerium monochalcogenides (Ott et al. 1979). 

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