Powder diffraction data for the homeotypic intermetallic compouds (CO, Ni)_4Al_13(h) and co_2Nial_9

摘要

Two homeotypical phases occur at the mole fraction xal=0.75 in the ternary system Co-Ni-Al:the pseudoternary intermetallic ompound (Co,Ni)_4Al_13(h) (space group C2/m, Pearson code mC(34-1.8)) [Notation, according to Parthe et al. (1993). TYPIX, standardized data and Crystal chemical Characterization of Inorpanic structure Types (Springer, Berlin), Vol.2, p.269, vol.3, p.1055]. For structures with partly occupied sites, the hybrid Pearson code is given as (the sum of the multiplicities of all, fully or partly occupied sites in the unit cell) - (number of structural vacancies in the unit cell)], and the ternary compound Co_2NiAl_9 (Immm, o196).