Twelve icosahedra by which Each individual boron atom has five closest neighbors inside the icosahedron. If the bonding ended up the conventional covalent type then Each and every boron might have donated 5 electrons. Nonetheless, boron has only 3 valence electrons, and it is thought the bonding inside the B https://trello.com/b/oadqBDlF/luoyang-tongrun-nano-technology