Syntheses, structures, and spectroscopic properties of plutonium and americium phosphites and the redetermination of the ionic radii of Pu (III) and Am (III)

JN Cross, EM Villa, S Wang, J Diwu… - Inorganic …, 2012 - ACS Publications
JN Cross, EM Villa, S Wang, J Diwu, MJ Polinski, TE Albrecht-Schmitt
Inorganic Chemistry, 2012•ACS Publications
A series of isotypic rare earth phosphites (RE= Ce (III), Pr (III), Nd (III), Pu (III), or Am (III)) with
the general formulas RE2 (HPO3) 3 (H2O) along with a Pu (IV) phosphite, Pu [(HPO3) 2
(H2O) 2], have been prepared hydrothermally via reactions of RECl3 with phosphorous acid.
The structure of RE2 (HPO3) 3 (H2O) features a face-sharing interaction of eight-and nine-
coordinate rare earth polyhedra. By use of the crystallographic data from the isotypic series
along with data from previously reported isotypic series, the ionic radii for higher coordinate …
A series of isotypic rare earth phosphites (RE = Ce(III), Pr(III), Nd(III), Pu(III), or Am(III)) with the general formulas RE2(HPO3)3(H2O) along with a Pu(IV) phosphite, Pu[(HPO3)2(H2O)2], have been prepared hydrothermally via reactions of RECl3 with phosphorous acid. The structure of RE2(HPO3)3(H2O) features a face-sharing interaction of eight- and nine-coordinate rare earth polyhedra. By use of the crystallographic data from the isotypic series along with data from previously reported isotypic series, the ionic radii for higher coordinate Pu(III) and Am(III) were calculated. The VIIIPu(III) radius was calculated as 1.112 ± 0.004 Å, and the IXPu(III) radius was calculated to be 1.165 ± 0.002 Å. The VIIIAm(III) radius was calculated as 1.108 ± 0.004 Å, and the IXAm(III) radius was calculated as 1.162 ± 0.002 Å.
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