Abstract

The new compound SrNp(PO4)(2) (orthorhombic Cmca) has been synthesized by a solid-state reaction and its crystal structure solved ab initio and refined by Rietveld analysis. Though chemically and structurally related to the cheralite CaTh(PO4)(2), SrNp(PO4)(2) shows alternate layers of SrO10 and NpO8 polyhedra instead of a disordered array of 9-fold polyhedra. Raman and IR spectroscopic measurements also account for ordered cations. This novel structural type allows one to explain the boundaries of the cheralite domain in terms of the cation size and can be proposed as an archetype for a series of other actinide-bearing phosphate compounds.

Published in

Inorganic Chemistry
2010, Volume: 49, number: 15, pages: 6904-6908
Publisher: AMER CHEMICAL SOC

UKÄ Subject classification

Inorganic Chemistry


Publication identifier

DOI: https://doi.org/10.1021/ic100376u

Permanent link to this page (URI)

https://res.slu.se/id/publ/95528