Gd2Mn17C3 crystallizes in the trigonal R-3m space group. Gd(1) is bonded in a trigonal planar geometry to one Mn(4), three equivalent Mn(1), and three equivalent C(1) atoms. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent Gd(1), two equivalent Mn(4), four equivalent Mn(2), and four equivalent Mn(3) atoms to form distorted MnGd2Mn10 cuboctahedra that share corners with four equivalent Mn(1)Gd2Mn10 cuboctahedra, corners with two equivalent C(1)Gd2Mn4 octahedra, faces with four equivalent Mn(1)Gd2Mn10 cuboctahedra, and faces with four equivalent C(1)Gd2Mn4 octahedra. The corner-sharing octahedral tilt angles are 47°. In the second Mn site, Mn(2) is bonded in a single-bond geometry to two equivalent Mn(1), two equivalent Mn(4), and one C(1) atom. In the third Mn site, Mn(3) is bonded in a single-bond geometry to one Mn(4), two equivalent Mn(1), and one C(1) atom. In the fourth Mn site, Mn(4) is bonded in a 14-coordinate geometry to one Gd(1), one Mn(4), three equivalent Mn(1), three equivalent Mn(3), and six equivalent Mn(2) atoms. C(1) is bonded to two equivalent Gd(1), two equivalent Mn(2), and two equivalent Mn(3) atoms to form CGd2Mn4 octahedra that share corners with two equivalent Mn(1)Gd2Mn10 cuboctahedra, corners with four equivalent C(1)Gd2Mn4 octahedra, and faces with four equivalent Mn(1)Gd2Mn10 cuboctahedra. The corner-sharing octahedral tilt angles are 61°.
Gd2Mn17C3 crystallizes in the trigonal R-3m space group. Gd(1) is bonded in a trigonal planar geometry to one Mn(4), three equivalent Mn(1), and three equivalent C(1) atoms. The Gd(1)-Mn(4) bond length is 3.20 Å. All Gd(1)-Mn(1) bond lengths are 3.38 Å. All Gd(1)-C(1) bond lengths are 2.49 Å. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent Gd(1), two equivalent Mn(4), four equivalent Mn(2), and four equivalent Mn(3) atoms to form distorted MnGd2Mn10 cuboctahedra that share corners with four equivalent Mn(1)Gd2Mn10 cuboctahedra, corners with two equivalent C(1)Gd2Mn4 octahedra, faces with four equivalent Mn(1)Gd2Mn10 cuboctahedra, and faces with four equivalent C(1)Gd2Mn4 octahedra. The corner-sharing octahedral tilt angles are 47°. Both Mn(1)-Mn(4) bond lengths are 2.65 Å. All Mn(1)-Mn(2) bond lengths are 2.44 Å. All Mn(1)-Mn(3) bond lengths are 2.42 Å. In the second Mn site, Mn(2) is bonded in a single-bond geometry to two equivalent Mn(1), two equivalent Mn(4), and one C(1) atom. Both Mn(2)-Mn(4) bond lengths are 2.67 Å. The Mn(2)-C(1) bond length is 1.90 Å. In the third Mn site, Mn(3) is bonded in a single-bond geometry to one Mn(4), two equivalent Mn(1), and one C(1) atom. The Mn(3)-Mn(4) bond length is 2.58 Å. The Mn(3)-C(1) bond length is 1.90 Å. In the fourth Mn site, Mn(4) is bonded in a 14-coordinate geometry to one Gd(1), one Mn(4), three equivalent Mn(1), three equivalent Mn(3), and six equivalent Mn(2) atoms. The Mn(4)-Mn(4) bond length is 2.34 Å. C(1) is bonded to two equivalent Gd(1), two equivalent Mn(2), and two equivalent Mn(3) atoms to form CGd2Mn4 octahedra that share corners with two equivalent Mn(1)Gd2Mn10 cuboctahedra, corners with four equivalent C(1)Gd2Mn4 octahedra, and faces with four equivalent Mn(1)Gd2Mn10 cuboctahedra. The corner-sharing octahedral tilt angles are 61°.