With regard to the work in progress on the ternary R-Cu-Sn alloys formed by
the rare earths, the data obtained in a partial revision of the Pr-Cu-Sn s
ystem are reported. The isothermal section at 400 degrees C has been studie
d in the composition range: PrCu5-Pr-Pr5Sn3-PrCuSn. The general characteris
tics of the systems formed by the light R are compared and discussed. (C) 2
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