Standard enthalpies of formation of neodymium alloys, Nd + Me (Me {equivalent_to} Ni, Ru, Rh, Pd, Ir, Pt), by high-temperature direct synthesis calorimetry

The Standard enthalpies of formation of 14 neodymium alloys have been determined by direct synthesis calorimetry at 1,477 {+-} 2 K. The following values of {Delta}H{degree}{sub f} (kJ/g atom) are reported: NdNi{sub 5}, {minus}(26.2 {+-} 1.1); Nd{sub 5}Ru{sub 2}, {minus}(17.2 {+-} 1.9); NdRu{sub 2}, {minus}(18.8 {+-} 1.2); Nd{sub 5}Rh{sub 4}, {minus}(59.9 {+-} 2.5); NdRh, {minus} (64.2 {+-} 2.0); NdRh{sub 2}, {minus}(59.9 {+-} 1.1); NdRh{sub 3}, {minus}(44.4 {+-} 1.6); NdPd {minus}(77.2 {+-} 2.7); NdPd{sub 3}, {minus}(73.3 {+-} 2.3); Nd{sub 5}Ir{sub 3}, {minus}(59.7 {+-} 2.7); NdIr{sub 2}, {minus}(67.6 {+-} 1.5); NdPt, {minus}(104.4 {+-} 2.6); NdPt{sub 2}, {minus}(97.9 {+-} 2.4); and NdPt{sub 5}, {minus}(55.0 {+-} 3.1). The results are compared with available literature data for some of the neodymium alloys and with predicted values from the Miedema model.