Crystal Structure of UGe2

Abstract
The crystal structure of UGe 2 has been determined by the X-ray precession method and Rietveld analysis of neutron powder diffraction data. The crystal system is orthorhombic (space group Cmmm) with lattice parameters a =0.40089(1), b =1.50889(3) and c =0.40950(1) nm. The structure is isomorphic with one of the polymorphs of ThGe 2 .