Yb11(Mn2C3)6 crystallizes in the cubic I-43m space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 6-coordinate geometry to six equivalent C(2) atoms. In the second Yb site, Yb(2) is bonded in a 8-coordinate geometry to four equivalent C(1) and four equivalent C(2) atoms. In the third Yb site, Yb(3) is bonded in a 12-coordinate geometry to twelve equivalent Mn(1) atoms. Mn(1) is bonded in a distorted trigonal non-coplanar geometry to one Yb(3), one C(1), and two equivalent C(2) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 7-coordinate geometry to four equivalent Yb(2), two equivalent Mn(1), and one C(1) atom. In the second C site, C(2) is bonded to two equivalent Yb(1), two equivalent Yb(2), and two equivalent Mn(1) atoms to form a mixture of distorted edge and corner-sharing CYb4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 1-71°.
Yb11(Mn2C3)6 crystallizes in the cubic I-43m space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 6-coordinate geometry to six equivalent C(2) atoms. There are three shorter (2.58 Å) and three longer (2.67 Å) Yb(1)-C(2) bond lengths. In the second Yb site, Yb(2) is bonded in a 8-coordinate geometry to four equivalent C(1) and four equivalent C(2) atoms. All Yb(2)-C(1) bond lengths are 2.63 Å. All Yb(2)-C(2) bond lengths are 2.56 Å. In the third Yb site, Yb(3) is bonded in a 12-coordinate geometry to twelve equivalent Mn(1) atoms. All Yb(3)-Mn(1) bond lengths are 2.91 Å. Mn(1) is bonded in a distorted trigonal non-coplanar geometry to one Yb(3), one C(1), and two equivalent C(2) atoms. The Mn(1)-C(1) bond length is 2.05 Å. Both Mn(1)-C(2) bond lengths are 1.82 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 7-coordinate geometry to four equivalent Yb(2), two equivalent Mn(1), and one C(1) atom. The C(1)-C(1) bond length is 1.37 Å. In the second C site, C(2) is bonded to two equivalent Yb(1), two equivalent Yb(2), and two equivalent Mn(1) atoms to form a mixture of distorted edge and corner-sharing CYb4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 1-71°.