The ytterbium-copper-aluminium system

Add time:08/13/2019    Source:sciencedirect.com

The isothermal section of the YbCuAl phase diagram at 870 K over the whole concentration region has been constructed using X-ray structure and phase analysis. We have confirmed the existence of earlier reported ternary compounds: YbCuAl (ZrNiAl type) and YbCu4Al8 (CeMn4Al8 type); the previously reported compound YbCu4Al proved to be a solid solution of aluminium in the binary compound YbCu5 (CaCu5). New ternary aluminides such as Yb4(Cu0.26Al0.74)33 (new structure type), Yb2(Cu0.57Al0.43)17 (Th2Zn17), Yb(Cu0.85Al0.15)6 (YbMo2Al4)7 Yb6(Cu0.74Al0.26)23 (Th6Mh23) and Yb(Cu0.30Al0.70)3 (PuNi3) have been prepared for the first time and their crystal structures have been determined. The limits of solid solutions of the binary compound YbCu5 and the homogeneity ranges of the ternary phases Yb(CuAl)12, Yb(CuAl)17 and Yb(CuAl)2 have been established.

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