FORMATION ENTHALPIES OF MBR-NDBR3 LIQUID-MIXTURES (M=LI, NA, K, RB, CS)

Molar enthalpies of mixing Delta(mix)H(m)(0), of the LiBr-NdBr3, NaBr- NdBr3, KBr-NdBr3, RbBr-NdBr3, and CsBr-NdBr3 liquid binary systems hav e been measured with a Calvet-type high-temperature microcalorimeter u nder argon at 1063 K over the whole composition range. Mixing of the t wo liquid components was carried out using a break-off ampoule techniq ue. For all the systems, the enthalpies of mixing were negative and th eir minima (at x(NdBrs)approximate to 0.4) were -0.7, -5.4, -12.4, -17 .8 and -20.1 kJ mol(-1), respectively. The results have been compared with data previously published for MCl-NdCl3 systems and discussed in terms of possible complex formation.