Tb7Co6Sn23 crystallizes in the trigonal P-3m1 space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 18-coordinate geometry to six equivalent Co(1), six equivalent Sn(1), and six equivalent Sn(6) atoms. In the second Tb site, Tb(2) is bonded in a 12-coordinate geometry to two equivalent Co(1), one Sn(2), one Sn(5), two equivalent Sn(1), two equivalent Sn(6), and four equivalent Sn(4) atoms. Co(1) is bonded in a 9-coordinate geometry to one Tb(1), two equivalent Tb(2), one Sn(2), one Sn(4), two equivalent Sn(1), and two equivalent Sn(6) atoms. There are six inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 2-coordinate geometry to one Tb(1), two equivalent Tb(2), and two equivalent Co(1) atoms. In the second Sn site, Sn(2) is bonded in a 7-coordinate geometry to three equivalent Tb(2), three equivalent Co(1), and one Sn(5) atom. In the third Sn site, Sn(3) is bonded in a 6-coordinate geometry to six equivalent Sn(6) atoms. In the fourth Sn site, Sn(4) is bonded in a distorted pentagonal planar geometry to four equivalent Tb(2), one Co(1), and one Sn(6) atom. In the fifth Sn site, Sn(5) is bonded in a 3-coordinate geometry to three equivalent Tb(2) and one Sn(2) atom. In the sixth Sn site, Sn(6) is bonded in a 7-coordinate geometry to one Tb(1), two equivalent Tb(2), two equivalent Co(1), one Sn(3), and one Sn(4) atom.
Tb7Co6Sn23 crystallizes in the trigonal P-3m1 space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 18-coordinate geometry to six equivalent Co(1), six equivalent Sn(1), and six equivalent Sn(6) atoms. All Tb(1)-Co(1) bond lengths are 3.41 Å. All Tb(1)-Sn(1) bond lengths are 3.36 Å. All Tb(1)-Sn(6) bond lengths are 3.35 Å. In the second Tb site, Tb(2) is bonded in a 12-coordinate geometry to two equivalent Co(1), one Sn(2), one Sn(5), two equivalent Sn(1), two equivalent Sn(6), and four equivalent Sn(4) atoms. Both Tb(2)-Co(1) bond lengths are 3.19 Å. The Tb(2)-Sn(2) bond length is 3.40 Å. The Tb(2)-Sn(5) bond length is 3.09 Å. Both Tb(2)-Sn(1) bond lengths are 3.39 Å. Both Tb(2)-Sn(6) bond lengths are 3.22 Å. There are two shorter (3.11 Å) and two longer (3.27 Å) Tb(2)-Sn(4) bond lengths. Co(1) is bonded in a 9-coordinate geometry to one Tb(1), two equivalent Tb(2), one Sn(2), one Sn(4), two equivalent Sn(1), and two equivalent Sn(6) atoms. The Co(1)-Sn(2) bond length is 2.79 Å. The Co(1)-Sn(4) bond length is 2.65 Å. Both Co(1)-Sn(1) bond lengths are 2.57 Å. Both Co(1)-Sn(6) bond lengths are 2.61 Å. There are six inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 2-coordinate geometry to one Tb(1), two equivalent Tb(2), and two equivalent Co(1) atoms. In the second Sn site, Sn(2) is bonded in a 7-coordinate geometry to three equivalent Tb(2), three equivalent Co(1), and one Sn(5) atom. The Sn(2)-Sn(5) bond length is 2.90 Å. In the third Sn site, Sn(3) is bonded in a 6-coordinate geometry to six equivalent Sn(6) atoms. All Sn(3)-Sn(6) bond lengths are 2.95 Å. In the fourth Sn site, Sn(4) is bonded in a distorted pentagonal planar geometry to four equivalent Tb(2), one Co(1), and one Sn(6) atom. The Sn(4)-Sn(6) bond length is 3.21 Å. In the fifth Sn site, Sn(5) is bonded in a 3-coordinate geometry to three equivalent Tb(2) and one Sn(2) atom. In the sixth Sn site, Sn(6) is bonded in a 7-coordinate geometry to one Tb(1), two equivalent Tb(2), two equivalent Co(1), one Sn(3), and one Sn(4) atom.