The crystal structure of a complex cerium(III) molybdate containing a dimolybdate chain, Ce 2(MoO 4) 2(Mo 2O 7)

Abstract

Ce 2(MoO 4) 2(Mo 2O 7) crystallizes in the triclinic system with unit cell dimensions (from single-crystal data) a = 11.903(8), b = 7.509(5), c = 7.385(5) Å, α = 94.33(8), β = 97.41(8), γ = 88.56(7)°, and space group P 1, z = 2 . The structure was solved using Patterson (“ P1 method”) and Fourier techniques. Of the 8065 unique reflections measured by counter techniques, 6314 with I ≥ 3 σ( I) were used in the least-squares refinement of the model to a conventional R of 0.035 ( R w = 0.034). The structure of Ce 2(MoO 4) 2(Mo 2O 7) consists of dimolybdate chains of the K 2Mo 2O 7 and (NH 4) 2Mo 2O 7 type separated by isolated MoO 4 tetrahedra and cerium(III) polyhedra.