A radiochemical investigation of YbCl3-(AlCl3)n complexes in the gas phase

Formation thermodynamics of the rare earth vapour complexes: DyAl3Cl12and DyAl2Cl9

“…(11)(12)(13)(14)(15)(16) This method was first reported by Papatheodorou and Kucera (13) for preparing SmCl 3 , and chlorides and bromides of other lanthanides and actinides, and then used by Steidl et al (15,16) for preparing GdCl 3 , TmCl 3 , and YbCl 3 .…”

“…Preliminary experiments also showed that the samples reacted with Pyrex glass at above T = 900 K and that the glass ampoules easily broke when quenching from an equilibrium pressure higher than (p/p°) = 2.5 at high temperature. Moreover, the literature (12,13,15,16) showed that at temperatures lower than T = (500 to 600) K, (solid + vapour), (solid + liquid), and solid solutions of (aluminium trichloride + lanthanide trichloride) might coexist and influence the equilibrium to be measured. Therefore, our experiments were made within the range T = (654 to 847) K and (p/p°) = (0.4 to 1.8).…”

“…(11)(12)(13)(14)(15)(16)29) The gaseous aluminium chloride reacted with only part of the DyCl 3 (s) so that the activity of DyCl 3 (s) in the well at part A of the ampoule was always equal to unity at the equilibrating temperature. The equilibria (2) and (3) were attained within 6 h. After the equilibrium was attained, part B of the ampoule (see figure 1) was covered with asbestos and quickly quenched with water.…”

“…Formation thermodynamics of the rare earth vapour complexes LnAl n Cl 3n + 3 have been investigated for Ln = Nd with n = 1, (11) 3, (12) and 4, (12) for Ln = Sm with n = 3, (13) for Ln = Gd with n = 3, (14) and for Ln = Gd, (15) Tm, (15) and Yb (16) with n = 1 to 4. The methods used to investigate these systems are mass spectrometric analysis, (11) u.v.-vis spectrometric analysis, (12,13) entrainment, quenching and chemical transport experiments, (14) and radiochemical analysis.…”

“…The methods used to investigate these systems are mass spectrometric analysis, (11) u.v.-vis spectrometric analysis, (12,13) entrainment, quenching and chemical transport experiments, (14) and radiochemical analysis. (15,16) We have reported thermodynamic measurements for aqueous solutions (17,18) and non-aqueous solutions (19) at room temperature, and for molten alloys, (20)(21)(22)(23) molten salt mixtures, (24,25) and molten slags (26)(27)(28) at high temperature. Very recently, we studied the thermodynamics of the rare earth vapour complexes LnAl n Cl 3n + 3 for Ln = Sc and Y with n = 2, measured by quenching experiments.…”