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 distorted hexagonal planar geometry to six equivalent Sn(5) atoms. In the second Tb site, Tb(2) is bonded in a 12-coordinate geometry to two equivalent Co(1), one Sn(1), one Sn(6), two equivalent Sn(3), two equivalent Sn(5), and four equivalent Sn(2) atoms. Co(1) is bonded in a 6-coordinate geometry to two equivalent Tb(2), one Sn(3), one Sn(6), and two equivalent Sn(5) atoms. There are six inequivalent Sn sites. In the first Sn site, Sn(6) is bonded in a 3-coordinate geometry to three equivalent Tb(2), three equivalent Co(1), and one Sn(1) atom. In the second Sn site, Sn(1) is bonded in a 7-coordinate geometry to three equivalent Tb(2), one Sn(6), and three equivalent Sn(2) atoms. In the third Sn site, Sn(2) is bonded in a 8-coordinate geometry to four equivalent Tb(2), one Sn(1), one Sn(3), and two equivalent Sn(2) atoms. In the fourth Sn site, Sn(3) is bonded in a distorted single-bond geometry to two equivalent Tb(2), one Co(1), one Sn(2), and one Sn(4) atom. In the fifth Sn site, Sn(4) is bonded in a distorted octahedral geometry to six equivalent Sn(3) atoms. In the sixth Sn site, Sn(5) is bonded in a 6-coordinate geometry to one Tb(1), two equivalent Tb(2), two equivalent Co(1), and one Sn(5) 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 distorted hexagonal planar geometry to six equivalent Sn(5) atoms. All Tb(1)-Sn(5) bond lengths are 3.53 Å. In the second Tb site, Tb(2) is bonded in a 12-coordinate geometry to two equivalent Co(1), one Sn(1), one Sn(6), two equivalent Sn(3), two equivalent Sn(5), and four equivalent Sn(2) atoms. Both Tb(2)-Co(1) bond lengths are 2.92 Å. The Tb(2)-Sn(1) bond length is 3.48 Å. The Tb(2)-Sn(6) bond length is 3.21 Å. Both Tb(2)-Sn(3) bond lengths are 3.36 Å. Both Tb(2)-Sn(5) bond lengths are 3.56 Å. There are two shorter (3.35 Å) and two longer (3.66 Å) Tb(2)-Sn(2) bond lengths. Co(1) is bonded in a 6-coordinate geometry to two equivalent Tb(2), one Sn(3), one Sn(6), and two equivalent Sn(5) atoms. The Co(1)-Sn(3) bond length is 2.33 Å. The Co(1)-Sn(6) bond length is 2.48 Å. Both Co(1)-Sn(5) bond lengths are 2.42 Å. There are six inequivalent Sn sites. In the first Sn site, Sn(6) is bonded in a 3-coordinate geometry to three equivalent Tb(2), three equivalent Co(1), and one Sn(1) atom. The Sn(6)-Sn(1) bond length is 3.37 Å. In the second Sn site, Sn(1) is bonded in a 7-coordinate geometry to three equivalent Tb(2), one Sn(6), and three equivalent Sn(2) atoms. All Sn(1)-Sn(2) bond lengths are 3.23 Å. In the third Sn site, Sn(2) is bonded in a 8-coordinate geometry to four equivalent Tb(2), one Sn(1), one Sn(3), and two equivalent Sn(2) atoms. The Sn(2)-Sn(3) bond length is 3.22 Å. Both Sn(2)-Sn(2) bond lengths are 3.19 Å. In the fourth Sn site, Sn(3) is bonded in a distorted single-bond geometry to two equivalent Tb(2), one Co(1), one Sn(2), and one Sn(4) atom. The Sn(3)-Sn(4) bond length is 2.82 Å. In the fifth Sn site, Sn(4) is bonded in a distorted octahedral geometry to six equivalent Sn(3) atoms. In the sixth Sn site, Sn(5) is bonded in a 6-coordinate geometry to one Tb(1), two equivalent Tb(2), two equivalent Co(1), and one Sn(5) atom. The Sn(5)-Sn(5) bond length is 3.06 Å.