Dy5Si3C crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. In the second Dy site, Dy(2) is bonded in a 2-coordinate geometry to five equivalent Si(1) and two equivalent C(1) atoms. Si(1) is bonded in a 9-coordinate geometry to four equivalent Dy(1) and five equivalent Dy(2) atoms. C(1) is bonded to six equivalent Dy(2) atoms to form face-sharing CDy6 octahedra.
Dy5Si3C crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. All Dy(1)-Si(1) bond lengths are 3.02 Å. In the second Dy site, Dy(2) is bonded in a 2-coordinate geometry to five equivalent Si(1) and two equivalent C(1) atoms. There are a spread of Dy(2)-Si(1) bond distances ranging from 2.99-3.55 Å. Both Dy(2)-C(1) bond lengths are 2.48 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Dy(1) and five equivalent Dy(2) atoms. C(1) is bonded to six equivalent Dy(2) atoms to form face-sharing CDy6 octahedra.