Abstract
Single crystals of La11V4+V35+O26 were prepared by high temperature reactions in an N2/H2 mixture above the melting point of the initial oxides V2O5–La2O3. X-ray investigations of the dark blue crystals reveal triclinic symmetry, space group Ci1(P1̄) with α = 7.088 Å, β = 10.213 Å, χ = 10.250 Å, α = 89.59°, β = 71.10°, τ = 70.00°, Z = 1. The lanthanum-rich compound exhibits a new structure type characterized by a complicated La11O2619- network with incorporated V4+V5+ ions. The VO4 tetrahedra are isolated from each other and occupied with V4+ and V5+ in a statistical manner.
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