Solid-Vapor Reactions

The most convenient method to prepare rare earth sesquichalcogenides is the solid-vapor reaction of the elements in evacuated tubes at relatively low temperatures. The resulting granular products are melted in vacuum. Liquid-vapor reactions are also used. Other techniques employ the reaction of M2O3 or M salts with H2Se. 

Room temperature susceptibilities for samples prepared by solid-vapor reaction and additionally sintered at 1700°C or arc melted are Xmoix10 =100> 66, and 1310cm /mol, respectively, Vickery, Muir, [24]. 

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