Standard enthalpies of formation of yttrium alloys, Y-Me (Me = Ru, Rh, Pd, Os, Ir, Pt), by high-temperature calorimetry

Abstract

The standard enthalpies of formation of yttrium alloys, Y Me (Me = Ru, Rh, Pd, Os, Ir, Pt) were determined by direct synthesis calorimetry at 1473 ± 2 K. The following values of [math] are reported (J/mole of atoms) : Ru2Y5, - (27.3 ± 3.1), RhY, - (76.1 ± 3.4) ; Rh2Y, - (65.4 ± 1.3) ; PdY, - (94.9 ± 3.8) ; Pd4Y3, - (92.8 ± 3.7) ; Pd3Y, - (79.0 ± 6.5) ; Os2Y, - (24.8 ± 2.8) ;IrY, - (65.9 ± 3.8) ; Ir2Y, - (59.4 ± 2.8) ; PtY, - (104 ± 2.3) ; Pt3Y, - (86.9 ± 2.0). The results are compared with the predictions of the models, and with earlier data for some of the corresponding zirconium alloys.