Materials Data on Co21(GeB3)2 by Materials Project
Co21(B3Ge)2 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are three inequivalent Co sites. In the first Co site, Co is bonded in a cuboctahedral geometry to twelve equivalent Co atoms. All Co–Co bond lengths are 2.48 Å. In the second Co site, Co is bonded to three equivalent B and one Ge atom to form a mixture of distorted corner and edge-sharing CoGeB3 tetrahedra. All Co–B bond lengths are 2.07 Å. The Co–Ge bond length is 2.36 Å. In the third Co site, Co is bonded in a distorted bent 150 degrees geometry to one Co and two equivalent B atoms. Both Co–B bond lengths are 2.09 Å. B is bonded in a 8-coordinate geometry to eight Co atoms. Ge is bonded in a distorted tetrahedral geometry to four equivalent Co atoms.