Re5Co2B4 crystallizes in the orthorhombic Cmmm space group. There are three inequivalent Re sites. In the first Re site, Re(1) is bonded in a 5-coordinate geometry to one B(1), two equivalent B(2), and two equivalent B(3) atoms. In the second Re site, Re(2) is bonded in a 5-coordinate geometry to one B(2), two equivalent B(1), and two equivalent B(3) atoms. In the third Re site, Re(3) is bonded in a 4-coordinate geometry to four equivalent B(3) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a square co-planar geometry to two equivalent B(1) and two equivalent B(2) atoms. In the second Co site, Co(2) is bonded in a 4-coordinate geometry to four equivalent B(3) atoms. There are three inequivalent B sites. In the first B site, B(3) is bonded in a 9-coordinate geometry to two equivalent Re(1), two equivalent Re(2), two equivalent Re(3), two equivalent Co(2), and one B(3) atom. In the second B site, B(1) is bonded in a 9-coordinate geometry to two equivalent Re(1), four equivalent Re(2), two equivalent Co(1), and one B(1) atom. In the third B site, B(2) is bonded in a 9-coordinate geometry to two equivalent Re(2), four equivalent Re(1), two equivalent Co(1), and one B(2) atom.
Re5Co2B4 crystallizes in the orthorhombic Cmmm space group. There are three inequivalent Re sites. In the first Re site, Re(1) is bonded in a 5-coordinate geometry to one B(1), two equivalent B(2), and two equivalent B(3) atoms. The Re(1)-B(1) bond length is 2.32 Å. Both Re(1)-B(2) bond lengths are 2.40 Å. Both Re(1)-B(3) bond lengths are 2.31 Å. In the second Re site, Re(2) is bonded in a 5-coordinate geometry to one B(2), two equivalent B(1), and two equivalent B(3) atoms. The Re(2)-B(2) bond length is 2.35 Å. Both Re(2)-B(1) bond lengths are 2.38 Å. Both Re(2)-B(3) bond lengths are 2.32 Å. In the third Re site, Re(3) is bonded in a 4-coordinate geometry to four equivalent B(3) atoms. All Re(3)-B(3) bond lengths are 2.29 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a square co-planar geometry to two equivalent B(1) and two equivalent B(2) atoms. Both Co(1)-B(1) bond lengths are 2.13 Å. Both Co(1)-B(2) bond lengths are 2.14 Å. In the second Co site, Co(2) is bonded in a 4-coordinate geometry to four equivalent B(3) atoms. All Co(2)-B(3) bond lengths are 2.30 Å. There are three inequivalent B sites. In the first B site, B(3) is bonded in a 9-coordinate geometry to two equivalent Re(1), two equivalent Re(2), two equivalent Re(3), two equivalent Co(2), and one B(3) atom. The B(3)-B(3) bond length is 2.20 Å. In the second B site, B(1) is bonded in a 9-coordinate geometry to two equivalent Re(1), four equivalent Re(2), two equivalent Co(1), and one B(1) atom. The B(1)-B(1) bond length is 1.87 Å. In the third B site, B(2) is bonded in a 9-coordinate geometry to two equivalent Re(2), four equivalent Re(1), two equivalent Co(1), and one B(2) atom. The B(2)-B(2) bond length is 1.84 Å.