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Neutron powder diffraction experiments have been performed on the two structurally related compounds U3Sn7 and USn2. The crystal structures of these two compounds were refined for the first time, confirming isotypism with Ce3Sn7 and ZrGa2 structure types, respectively. The anti-ferromagnetic ordering suggested by susceptibility measurement on USn2 was confirmed and the magnetic structure was solved. It corresponds to a collinear anti-ferromagnetic structure with a propagation vector k=(0, 0, 1/2). The magnetic moment derived from Rietveld refinement of the neutron powder diffraction pattern at 1.5 K is 1.56 µ/U. The presence of anti-ferromagnetic ordering in the U3Sn7 compound was confirmed, but the magnetic structure model could not be determined due to the very low intensity of the magnetic Bragg peaks.

Additional information

Authors: BOULET P, European Commission, Intitute for Transuranium Elements, Karlsruhe (DE);ANDRE G, Laboratoire Leon Brillouin (CEA-CNRS), Gif-sur-Yvette (FR);BOUREE F, Laboratoire Leon Brillouin (CEA-CNRS), Gif-sur-Yvette (FR);NOEL H, Laboratoire de Chimie du Solide et Inorganique Moleculaire, Universite de Rennes (FR)
Bibliographic Reference: An article published in: Journal of Alloys and Compounds, 329 (2001) 47-49
Record Number: 200214345 / Last updated on: 2002-02-13
Original language: en
Available languages: en