Interaction of the components in the Dy–Ag–Sn ternary system at 870 K

Abstract

The phase diagram of the Dy–Ag–Sn ternary system was constructed at 870 K using data of X-ray and partially metallographic analyses. Presence of the DyAgSn stannide in the system was confirmed (ST CaIn 2, SG P6 3/ mmc, a = 0.46813(2), c = 0.73433(5) nm) and two new compounds were found: Dy 3Ag 4Sn 4 (ST Gd 3Cu 4Ge 4, SG Immm, a = 0.45316(1), b = 0.72887(2), c = 1.51225(5) nm) and DyAgSn 2 (ST Cu 3Au, SG Pm-3 m, a = 0.45310(1) nm). The DyAgSn 2 is a Curie–Weiss paramagnet in the temperature range 80–470 K ( μ eff = 10.64 μ B, θ р = −14 K). A formation of substitutional solid solutions DyAg 1− x Sn x and DyAg 2− x Sn x was established.