Twelve icosahedra in which Every boron atom has 5 closest neighbors in the icosahedron. If the bonding have been the conventional covalent form then Each and every boron might have donated five electrons. Having said that, boron has only a few valence electrons, and it is believed that the bonding https://www.politicaljobhunt.com/employers/b7e7c7f6-f30e-4a48-8601-9b28bff3cdef/edit