Ba(CoSn4)2 crystallizes in the orthorhombic Cccm space group. Ba(1) is bonded in a 13-coordinate geometry to one Sn(1), two equivalent Sn(3), two equivalent Sn(4), four equivalent Sn(5), and four equivalent Sn(6) atoms. Co(1) is bonded in a 7-coordinate geometry to one Sn(1), one Sn(3), one Sn(4), one Sn(6), one Sn(7), and two equivalent Sn(5) atoms. There are seven inequivalent Sn sites. In the first Sn site, Sn(4) is bonded in a 2-coordinate geometry to two equivalent Ba(1) and two equivalent Co(1) atoms. In the second Sn site, Sn(5) is bonded in a 3-coordinate geometry to two equivalent Ba(1), two equivalent Co(1), and one Sn(1) atom. In the third Sn site, Sn(6) is bonded in a 1-coordinate geometry to two equivalent Ba(1), one Co(1), one Sn(1), and one Sn(2) atom. In the fourth Sn site, Sn(7) is bonded in a 4-coordinate geometry to four equivalent Co(1) atoms. In the fifth Sn site, Sn(1) is bonded in a 8-coordinate geometry to one Ba(1), two equivalent Co(1), one Sn(1), two equivalent Sn(5), and two equivalent Sn(6) atoms. In the sixth Sn site, Sn(2) is bonded in a distorted octahedral geometry to two equivalent Sn(3) and four equivalent Sn(6) atoms. In the seventh Sn site, Sn(3) is bonded in a 5-coordinate geometry to two equivalent Ba(1), two equivalent Co(1), and one Sn(2) atom.
Ba(CoSn4)2 crystallizes in the orthorhombic Cccm space group. Ba(1) is bonded in a 13-coordinate geometry to one Sn(1), two equivalent Sn(3), two equivalent Sn(4), four equivalent Sn(5), and four equivalent Sn(6) atoms. The Ba(1)-Sn(1) bond length is 3.80 Å. Both Ba(1)-Sn(3) bond lengths are 3.69 Å. Both Ba(1)-Sn(4) bond lengths are 3.72 Å. There are two shorter (3.54 Å) and two longer (4.01 Å) Ba(1)-Sn(5) bond lengths. There are two shorter (3.78 Å) and two longer (3.90 Å) Ba(1)-Sn(6) bond lengths. Co(1) is bonded in a 7-coordinate geometry to one Sn(1), one Sn(3), one Sn(4), one Sn(6), one Sn(7), and two equivalent Sn(5) atoms. The Co(1)-Sn(1) bond length is 2.63 Å. The Co(1)-Sn(3) bond length is 2.63 Å. The Co(1)-Sn(4) bond length is 2.56 Å. The Co(1)-Sn(6) bond length is 2.63 Å. The Co(1)-Sn(7) bond length is 2.62 Å. There is one shorter (2.63 Å) and one longer (2.70 Å) Co(1)-Sn(5) bond length. There are seven inequivalent Sn sites. In the first Sn site, Sn(4) is bonded in a 2-coordinate geometry to two equivalent Ba(1) and two equivalent Co(1) atoms. In the second Sn site, Sn(5) is bonded in a 3-coordinate geometry to two equivalent Ba(1), two equivalent Co(1), and one Sn(1) atom. The Sn(5)-Sn(1) bond length is 3.19 Å. In the third Sn site, Sn(6) is bonded in a 1-coordinate geometry to two equivalent Ba(1), one Co(1), one Sn(1), and one Sn(2) atom. The Sn(6)-Sn(1) bond length is 3.21 Å. The Sn(6)-Sn(2) bond length is 3.16 Å. In the fourth Sn site, Sn(7) is bonded in a 4-coordinate geometry to four equivalent Co(1) atoms. In the fifth Sn site, Sn(1) is bonded in a 8-coordinate geometry to one Ba(1), two equivalent Co(1), one Sn(1), two equivalent Sn(5), and two equivalent Sn(6) atoms. The Sn(1)-Sn(1) bond length is 2.99 Å. In the sixth Sn site, Sn(2) is bonded in a distorted octahedral geometry to two equivalent Sn(3) and four equivalent Sn(6) atoms. Both Sn(2)-Sn(3) bond lengths are 3.13 Å. In the seventh Sn site, Sn(3) is bonded in a 5-coordinate geometry to two equivalent Ba(1), two equivalent Co(1), and one Sn(2) atom.