The homometallic warwickite V2OBO3

Crystal structure of homometallic warwickite V2OBO3 at ambient temperature, viewed down the b-direction (left), looking down on the ribbons made from edge-sharing VO6 octahedra. The trigonal planar BO3 groups are also shown. The octahedra share edges in the ribbons (top right). Vanadium is shown in blue (inside the orange octahedra), boron in grey, and oxygen in red. An isolated set of V2-V1-V1-V2 -oxygen octahedra in the width of the ribbon, with all atoms labeled, is also shown (bottom right).423