This Structure is layered: the B12 icosahedra and bridging carbons type a community plane that spreads parallel for the c-aircraft and stacks alongside the c-axis. The lattice has two essential construction units �?the B12 icosahedron plus the B6 octahedron. Due to smaller sizing of your B6 octahedra, they can't interconnect. https://angelokidzu.wikinstructions.com/1131815/boron_nitride_an_overview