X-Ray phase and diffraction analysis of component interaction in the (
Ca, Eu, Sr)-Cu-Al systems made it possible to plot isothermal sections
of their phase diagrams for 770 and 670 K. The existence of 10, 6, an
d 4 ternary compounds, respectively, was established, Solid substituti
onal solutions form on the basis of the compounds RCu5 and RAl4 (type
of structure of CaCu5 and BaAl4)