The crystal structure of a complex cerium(III) molybdate; Ce 6(MoO 4) 8(Mo 2O 7)

Abstract

Ce 6Mo 10O 39 crystallizes in the triclinic system with unit-cell dimensions (from single-crystal data) a = 10.148(5), Å, b = 18.764(6), Å, c = 9.566(5), Å, α = 103.12(7)°, β = 78.07(7)°, γ = 107.69(7)°, and space group P 1, z = 2 . The structure was solved using direct methods with 3113 countermeasured reflections (Mo Kα radiation), and refined using Fourier and least-squares techniques to a conventional R of 0.039 ( ωR = 0.047). Ce 6Mo 10O 39 has a structure that consists of isolated MoO 4 tetrahedra together with one corner-shared pair of tetrahedra, linked to irregular eight-coordinate Ce(III) polyhedra. The average MoO distance of 1.77 Å, and average CeO distance of 2.52 Å are in good agreement with previously reported values.