Synthesis and Structure of Mixed Cromate–Nitrate Complexes of Hexavalent Actinides, [(CH3)4N][(AnO2)(CrO4)(NO3)] (An = U, Np, Pu)
- Authors: Ivanova A.G.1,2, Grigor’ev M.S.1, Fedoseev A.M.1
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Affiliations:
- Frumkin Institute of Physical Chemistry and Electrochemistry
- Shubnikov Institute of Crystallography, Federal Research Center for Crystallography and Photonics
- Issue: Vol 60, No 2 (2018)
- Pages: 148-151
- Section: Article
- URL: https://journals.rcsi.science/1066-3622/article/view/224404
- DOI: https://doi.org/10.1134/S1066362218020030
- ID: 224404
Cite item
Abstract
Mixed-anion compounds of the general composition [(CH3)4N][(AnO2)(CrO4)(NO3)], where An = U, Np, and Pu, were synthesized and structurally characterized. The structural motif of these compounds is based on anionic ribbons of the composition [AnO2(NO3)(CrO4)]nn–, consisting of seven-vertex An polyhedra linked via oppositely oriented CrO4 tetrahedra and NO3 groups acting in the An polyhedra as terminal bidentate ligands. Every four anionic ribbons form channels oriented along b-axis. Tetramethylammonium cations linked with the O atoms of the ribbons by hydrogen bonds are located in these channels. Actinide contraction is observed in the series U–Np–Pu. It is manifested in a regular decrease in the interatomic distances in the An polyhedra, in parameters b and c, and in the unit cell volume.
Keywords
About the authors
A. G. Ivanova
Frumkin Institute of Physical Chemistry and Electrochemistry; Shubnikov Institute of Crystallography, Federal Research Center for Crystallography and Photonics
Author for correspondence.
Email: ani@ns.crys.ras.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 119071; Leninskii pr. 59, Moscow, 119333
M. S. Grigor’ev
Frumkin Institute of Physical Chemistry and Electrochemistry
Email: ani@ns.crys.ras.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 119071
A. M. Fedoseev
Frumkin Institute of Physical Chemistry and Electrochemistry
Email: ani@ns.crys.ras.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 119071