Hydrothermal synthesis, structure, and magnetic properties of Pu(SeO3)2

Abstract

The reaction between PuO2 and SeO2 under mild hydrothermal conditions results in the formation of Pu(SeO3)2 as brick-red prisms. This compound adopts the Ce(SeO3)2 structure type, and consists of one-dimensional chains of edge-sharing [PuO8] distorted bicapped trigonal prisms linked by [SeO3] units into a three-dimensional network. Crystallographic data: Pu(SeO3)2, monoclinic, space group P21/n, a ¼ 6.960(1) A˚ , b ¼ 10.547(2) A˚ , c ¼ 7.245(1) A˚ , b ¼ 106.880(9)1, V ¼ 508.98(17) A˚ 3, Z ¼ 4 (T ¼ 193 K), R(F) ¼ 2.92% for 83 parameters with 1140 reflections with I42s(I). Magnetic susceptibility data for Pu(SeO3)2 are linear from 35 to 320 K and yield an effective moment of 2.71(5) mB and a Weiss constant of -500(5) K.