Y7Co6Sn23 crystallizes in the trigonal P-3m1 space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 18-coordinate geometry to six equivalent Co(1), six equivalent Sn(2), and six equivalent Sn(3) atoms. In the second Y site, Y(2) is bonded in a 12-coordinate geometry to two equivalent Co(1), one Sn(5), one Sn(6), two equivalent Sn(2), two equivalent Sn(3), and four equivalent Sn(4) atoms. Co(1) is bonded in a 9-coordinate geometry to one Y(1), two equivalent Y(2), one Sn(4), one Sn(5), two equivalent Sn(2), and two equivalent Sn(3) atoms. There are six inequivalent Sn sites. In the first Sn site, Sn(5) is bonded in a 7-coordinate geometry to three equivalent Y(2), three equivalent Co(1), and one Sn(6) atom. In the second Sn site, Sn(6) is bonded in a 3-coordinate geometry to three equivalent Y(2) and one Sn(5) atom. In the third Sn site, Sn(1) is bonded in a 6-coordinate geometry to six equivalent Sn(2) atoms. In the fourth Sn site, Sn(2) is bonded in a 7-coordinate geometry to one Y(1), two equivalent Y(2), two equivalent Co(1), one Sn(1), and one Sn(4) atom. In the fifth Sn site, Sn(3) is bonded in a 2-coordinate geometry to one Y(1), two equivalent Y(2), and two equivalent Co(1) atoms. In the sixth Sn site, Sn(4) is bonded in a distorted pentagonal planar geometry to four equivalent Y(2), one Co(1), and one Sn(2) atom.
Y7Co6Sn23 crystallizes in the trigonal P-3m1 space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 18-coordinate geometry to six equivalent Co(1), six equivalent Sn(2), and six equivalent Sn(3) atoms. All Y(1)-Co(1) bond lengths are 3.41 Å. All Y(1)-Sn(2) bond lengths are 3.35 Å. All Y(1)-Sn(3) bond lengths are 3.36 Å. In the second Y site, Y(2) is bonded in a 12-coordinate geometry to two equivalent Co(1), one Sn(5), one Sn(6), two equivalent Sn(2), two equivalent Sn(3), and four equivalent Sn(4) atoms. Both Y(2)-Co(1) bond lengths are 3.19 Å. The Y(2)-Sn(5) bond length is 3.41 Å. The Y(2)-Sn(6) bond length is 3.08 Å. Both Y(2)-Sn(2) bond lengths are 3.22 Å. Both Y(2)-Sn(3) bond lengths are 3.39 Å. There are two shorter (3.11 Å) and two longer (3.26 Å) Y(2)-Sn(4) bond lengths. Co(1) is bonded in a 9-coordinate geometry to one Y(1), two equivalent Y(2), one Sn(4), one Sn(5), two equivalent Sn(2), and two equivalent Sn(3) atoms. The Co(1)-Sn(4) bond length is 2.65 Å. The Co(1)-Sn(5) bond length is 2.79 Å. Both Co(1)-Sn(2) bond lengths are 2.61 Å. Both Co(1)-Sn(3) bond lengths are 2.57 Å. There are six inequivalent Sn sites. In the first Sn site, Sn(5) is bonded in a 7-coordinate geometry to three equivalent Y(2), three equivalent Co(1), and one Sn(6) atom. The Sn(5)-Sn(6) bond length is 2.89 Å. In the second Sn site, Sn(6) is bonded in a 3-coordinate geometry to three equivalent Y(2) and one Sn(5) atom. In the third Sn site, Sn(1) is bonded in a 6-coordinate geometry to six equivalent Sn(2) atoms. All Sn(1)-Sn(2) bond lengths are 2.95 Å. In the fourth Sn site, Sn(2) is bonded in a 7-coordinate geometry to one Y(1), two equivalent Y(2), two equivalent Co(1), one Sn(1), and one Sn(4) atom. The Sn(2)-Sn(4) bond length is 3.21 Å. In the fifth Sn site, Sn(3) is bonded in a 2-coordinate geometry to one Y(1), two equivalent Y(2), and two equivalent Co(1) atoms. In the sixth Sn site, Sn(4) is bonded in a distorted pentagonal planar geometry to four equivalent Y(2), one Co(1), and one Sn(2) atom.