Published March 1982 | Version v1
Journal article

Crystallographic and magnetic studies of a new neptunium selenide: Np2Se5

  • 1. Institut Curie, Laboratoire des Transuraniens, Paris (France)
  • 2. CEA Centre d'Etudes Nucleaires de Fontenay-aux-Roses, 92 (France). Dept. de Genie Radioactif

Description

A new neptunium selenide Np2Se5 was obtained. It exhibits an orthorhombic pseudotetragonal structure of the Th2S5 type. The lattice parameters are a = 7.725(3) A, b = 7.725(3) A and c = 10.622(5) A. Magnetic susceptibility measurements performed on powder samples between 4.2 and 300 K show a ferromagnetic phase transition at 15 K. 237Np Moessbauer measurements at 4.2 K confirm the magnetic order. The Moessbauer spectrum at 77 K exhibits single quadrupole splitting with an isomer shift of 12.7(5) mm s-1 relative to NpAl2. (Auth.)

Additional details

Publishing Information

Journal Title
J. Less-Common Met.
Journal Volume
84
Journal Issue
1
Series
J. Less-Common Met.
Journal Page Range
133-137
ISSN
0022-5088