Y5Ge3C crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 6-coordinate geometry to six equivalent Ge(1) atoms. In the second Y site, Y(2) is bonded in a 2-coordinate geometry to five equivalent Ge(1) and two equivalent C(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Y(1) and five equivalent Y(2) atoms. C(1) is bonded to six equivalent Y(2) atoms to form face-sharing CY6 octahedra.
Y5Ge3C crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 6-coordinate geometry to six equivalent Ge(1) atoms. All Y(1)-Ge(1) bond lengths are 3.04 Å. In the second Y site, Y(2) is bonded in a 2-coordinate geometry to five equivalent Ge(1) and two equivalent C(1) atoms. There are a spread of Y(2)-Ge(1) bond distances ranging from 3.01-3.62 Å. Both Y(2)-C(1) bond lengths are 2.48 Å. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Y(1) and five equivalent Y(2) atoms. C(1) is bonded to six equivalent Y(2) atoms to form face-sharing CY6 octahedra.