Hydroxide complexes of lanthanides—IV ytterbium(III) in perchlorate medium

Add time:08/09/2019    Source:sciencedirect.com

From the precipitation borderline in the pM′-pCH diagram, determined experimentally under CO2-free conditions, the stability constants of the mononuclear species of ytterbium hydroxide have been established. The values found are log *β1 = −7.7, log *β2 = −15.5, log *β3 = −23.2, log *β4 = −37.5, log *β5 = −51.9, log *β6 = −66.2 and log *KS0 = 18.0. The data refer to fresh precipitates, prepared at room temperature (21.5 ± 0.2°) 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.

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