Th2(CoAs)3 crystallizes in the triclinic P1 space group. There are two inequivalent Th sites. In the first Th site, Th(1) is bonded in a 7-coordinate geometry to one Co(1), three equivalent Co(2), and three equivalent As(2) atoms. In the second Th site, Th(2) is bonded in a 7-coordinate geometry to one Co(2), three equivalent Co(1), and three equivalent As(1) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 10-coordinate geometry to one Th(1), three equivalent Th(2), three equivalent Co(2), and three equivalent As(3) atoms. In the second Co site, Co(2) is bonded in a 10-coordinate geometry to one Th(2), three equivalent Th(1), three equivalent Co(1), and three equivalent As(3) atoms. In the third Co site, Co(3) is bonded in a 6-coordinate geometry to three equivalent As(1) and three equivalent As(2) atoms. There are three inequivalent As sites. In the first As site, As(1) is bonded to three equivalent Th(2) and three equivalent Co(3) atoms to form a mixture of distorted corner and edge-sharing AsTh3Co3 octahedra. The corner-sharing octahedra are not tilted. In the second As site, As(2) is bonded to three equivalent Th(1) and three equivalent Co(3) atoms to form a mixture of distorted corner and edge-sharing AsTh3Co3 octahedra. The corner-sharing octahedra are not tilted. In the third As site, As(3) is bonded in a 6-coordinate geometry to three equivalent Co(1) and three equivalent Co(2) atoms.
Th2(CoAs)3 crystallizes in the triclinic P1 space group. There are two inequivalent Th sites. In the first Th site, Th(1) is bonded in a 7-coordinate geometry to one Co(1), three equivalent Co(2), and three equivalent As(2) atoms. The Th(1)-Co(1) bond length is 2.96 Å. There are a spread of Th(1)-Co(2) bond distances ranging from 2.83-2.93 Å. There are two shorter (3.02 Å) and one longer (3.03 Å) Th(1)-As(2) bond length. In the second Th site, Th(2) is bonded in a 7-coordinate geometry to one Co(2), three equivalent Co(1), and three equivalent As(1) atoms. The Th(2)-Co(2) bond length is 2.94 Å. There are a spread of Th(2)-Co(1) bond distances ranging from 2.81-2.93 Å. There is one shorter (3.02 Å) and two longer (3.03 Å) Th(2)-As(1) bond lengths. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 10-coordinate geometry to one Th(1), three equivalent Th(2), three equivalent Co(2), and three equivalent As(3) atoms. There are two shorter (2.62 Å) and one longer (2.64 Å) Co(1)-Co(2) bond length. There are a spread of Co(1)-As(3) bond distances ranging from 2.39-2.41 Å. In the second Co site, Co(2) is bonded in a 10-coordinate geometry to one Th(2), three equivalent Th(1), three equivalent Co(1), and three equivalent As(3) atoms. There are a spread of Co(2)-As(3) bond distances ranging from 2.38-2.41 Å. In the third Co site, Co(3) is bonded in a 6-coordinate geometry to three equivalent As(1) and three equivalent As(2) atoms. There is one shorter (2.48 Å) and two longer (2.49 Å) Co(3)-As(1) bond lengths. All Co(3)-As(2) bond lengths are 2.49 Å. There are three inequivalent As sites. In the first As site, As(1) is bonded to three equivalent Th(2) and three equivalent Co(3) atoms to form a mixture of distorted corner and edge-sharing AsTh3Co3 octahedra. The corner-sharing octahedra are not tilted. In the second As site, As(2) is bonded to three equivalent Th(1) and three equivalent Co(3) atoms to form a mixture of distorted corner and edge-sharing AsTh3Co3 octahedra. The corner-sharing octahedra are not tilted. In the third As site, As(3) is bonded in a 6-coordinate geometry to three equivalent Co(1) and three equivalent Co(2) atoms.