The result of gas-phase nitrogenation for the TiCoSn compound is repor
ted. The cell volume of the synthesized nitride TiCoNo0.33Sn with Heus
ler-type structure is 3.3% greater than for the parent compound. It is
concluded that the TiCoSn nitride is a simple gas-solid solution with
intermediate nitrogen contents and that the nitrogen atoms in the nit
rides are introduced into the vacancy sublattice sites in the parent c
ompound.