Crystal structures of U2V2O11 and UV2O8

Abstract

The crystal structures of U₂V₂O₁₁ and UV₂O₈ have been determined using single-crystal X-ray and powder neutron diffraction. For U₂V₂O₁₁, space group P2₁/n, a= 6.644(1)Å, b= 13.184(1)Å, c= 5.657(1)Å and β= 107.88(1)°, V= 471.59 ų, Z= 2. For UV₂O₈, space group Pnma, a= 5.726(1)Å, b= 11.932(1)Å and c= 10.499(1)Å, V= 717.32 ų, Z= 4. The structures are discussed in terms of linkages between UO₇ and VO₄ polyhedra.