Gd3Co11B4 crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 20-coordinate geometry to one Gd(1), one Gd(2), two equivalent Co(2), two equivalent Co(5), four equivalent Co(1), four equivalent Co(4), and six equivalent B(1) atoms. In the second Gd site, Gd(2) is bonded in a 18-coordinate geometry to two equivalent Gd(1), four equivalent Co(2), six equivalent Co(3), and eight equivalent Co(1) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted L-shaped geometry to two equivalent Gd(1), two equivalent Gd(2), two equivalent Co(3), and two equivalent B(1) atoms. In the second Co site, Co(2) is bonded in a distorted L-shaped geometry to two equivalent Gd(1), two equivalent Gd(2), two equivalent Co(3), and two equivalent B(1) atoms. In the third Co site, Co(3) is bonded in a 9-coordinate geometry to three equivalent Gd(2), two equivalent Co(2), and four equivalent Co(1) atoms. In the fourth Co site, Co(4) is bonded in a distorted square co-planar geometry to four equivalent Gd(1) and four equivalent B(1) atoms. In the fifth Co site, Co(5) is bonded in a distorted square co-planar geometry to four equivalent Gd(1) and four equivalent B(1) atoms. B(1) is bonded in a 6-coordinate geometry to three equivalent Gd(1), one Co(2), one Co(5), two equivalent Co(1), and two equivalent Co(4) atoms.
Gd3Co11B4 crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 20-coordinate geometry to one Gd(1), one Gd(2), two equivalent Co(2), two equivalent Co(5), four equivalent Co(1), four equivalent Co(4), and six equivalent B(1) atoms. The Gd(1)-Gd(1) bond length is 3.01 Å. The Gd(1)-Gd(2) bond length is 3.34 Å. Both Gd(1)-Co(2) bond lengths are 2.88 Å. Both Gd(1)-Co(5) bond lengths are 2.94 Å. All Gd(1)-Co(1) bond lengths are 2.89 Å. All Gd(1)-Co(4) bond lengths are 2.95 Å. There are four shorter (2.92 Å) and two longer (2.93 Å) Gd(1)-B(1) bond lengths. In the second Gd site, Gd(2) is bonded in a 18-coordinate geometry to two equivalent Gd(1), four equivalent Co(2), six equivalent Co(3), and eight equivalent Co(1) atoms. All Gd(2)-Co(2) bond lengths are 3.19 Å. There are four shorter (2.91 Å) and two longer (2.93 Å) Gd(2)-Co(3) bond lengths. All Gd(2)-Co(1) bond lengths are 3.19 Å. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted L-shaped geometry to two equivalent Gd(1), two equivalent Gd(2), two equivalent Co(3), and two equivalent B(1) atoms. Both Co(1)-Co(3) bond lengths are 2.43 Å. Both Co(1)-B(1) bond lengths are 2.07 Å. In the second Co site, Co(2) is bonded in a distorted L-shaped geometry to two equivalent Gd(1), two equivalent Gd(2), two equivalent Co(3), and two equivalent B(1) atoms. Both Co(2)-Co(3) bond lengths are 2.43 Å. Both Co(2)-B(1) bond lengths are 2.07 Å. In the third Co site, Co(3) is bonded in a 9-coordinate geometry to three equivalent Gd(2), two equivalent Co(2), and four equivalent Co(1) atoms. In the fourth Co site, Co(4) is bonded in a distorted square co-planar geometry to four equivalent Gd(1) and four equivalent B(1) atoms. All Co(4)-B(1) bond lengths are 2.04 Å. In the fifth Co site, Co(5) is bonded in a distorted square co-planar geometry to four equivalent Gd(1) and four equivalent B(1) atoms. All Co(5)-B(1) bond lengths are 2.05 Å. B(1) is bonded in a 6-coordinate geometry to three equivalent Gd(1), one Co(2), one Co(5), two equivalent Co(1), and two equivalent Co(4) atoms.