Hydroxide complexes of lanthanides-V Erbium(III) in perchlorate medium.
From the precipitation borderline in the pM'-pC(H) diagram, determined experimentally under CO(2)-free conditions, stability constants for the mononuclear species of erbium hydroxide have been established. The values found were log ( *)beta(1) = -6.3, log ( *)beta(2) = -14.5, log ( *)beta(3) = -23.1, log ( *)beta(4) = -36.8 and log ( *)K(0) = 18.0. The data refer to precipitates prepared at room temperature (21.5 +/- 0.5 degrees ) in sodium perchlorate medium with an ionic strength of 1. The formation of polynuclear hydroxide complexes has been considered and rejected as unlikely to occur.
Kragten
J
J
Natuurkundig Laboratorium der Universiteit van Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands.
Decnop-Weever
L G
LG