Co5(SnAs)2 crystallizes in the hexagonal P-6m2 space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 11-coordinate geometry to one Co(1), one Co(2), three equivalent Co(3), three equivalent Sn(1), and three equivalent As(1) atoms. In the second Co site, Co(2) is bonded in a distorted body-centered cubic geometry to one Co(1), one Co(2), three equivalent Sn(2), and three equivalent As(1) atoms. In the third Co site, Co(3) is bonded to six equivalent Co(1), three equivalent Sn(1), and two equivalent As(1) atoms to form distorted face-sharing CoCo6Sn3As2 trigonal bipyramids. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to three equivalent Co(3) and six equivalent Co(1) atoms. In the second Sn site, Sn(2) is bonded in a 6-coordinate geometry to six equivalent Co(2) atoms. As(1) is bonded in a 7-coordinate geometry to one Co(3), three equivalent Co(1), and three equivalent Co(2) atoms.
Co5(SnAs)2 crystallizes in the hexagonal P-6m2 space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 11-coordinate geometry to one Co(1), one Co(2), three equivalent Co(3), three equivalent Sn(1), and three equivalent As(1) atoms. The Co(1)-Co(1) bond length is 2.55 Å. The Co(1)-Co(2) bond length is 2.28 Å. All Co(1)-Co(3) bond lengths are 2.68 Å. All Co(1)-Sn(1) bond lengths are 2.68 Å. All Co(1)-As(1) bond lengths are 2.62 Å. In the second Co site, Co(2) is bonded in a distorted body-centered cubic geometry to one Co(1), one Co(2), three equivalent Sn(2), and three equivalent As(1) atoms. The Co(2)-Co(2) bond length is 2.52 Å. All Co(2)-Sn(2) bond lengths are 2.67 Å. All Co(2)-As(1) bond lengths are 2.61 Å. In the third Co site, Co(3) is bonded to six equivalent Co(1), three equivalent Sn(1), and two equivalent As(1) atoms to form distorted face-sharing CoCo6Sn3As2 trigonal bipyramids. All Co(3)-Sn(1) bond lengths are 2.36 Å. Both Co(3)-As(1) bond lengths are 2.43 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to three equivalent Co(3) and six equivalent Co(1) atoms. In the second Sn site, Sn(2) is bonded in a 6-coordinate geometry to six equivalent Co(2) atoms. As(1) is bonded in a 7-coordinate geometry to one Co(3), three equivalent Co(1), and three equivalent Co(2) atoms.