Mg6MnC crystallizes in the orthorhombic Amm2 space group. There are six inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 11-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mn(1), and one C(1) atom. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mn(1), and two equivalent C(1) atoms. In the third Mg site, Mg(2) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mn(1), and two equivalent C(1) atoms. In the fourth Mg site, Mg(3) is bonded to two equivalent Mg(4); four Mg(1,1); four Mg(2,2); and two equivalent Mn(1) atoms to form a mixture of distorted face and corner-sharing MgMg10Mn2 cuboctahedra. In the fifth Mg site, Mg(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Mg(3); four equivalent Mg(1); four Mg(2,2); and two equivalent C(1) atoms. In the sixth Mg site, Mg(1) is bonded in a 11-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mn(1), and one C(1) atom. Mn(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3); four Mg(1,1); and four Mg(2,2) atoms. C(1) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent Mg(4), and four equivalent Mg(2) atoms.
Mg6MnC crystallizes in the orthorhombic Amm2 space group. There are six inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 11-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mn(1), and one C(1) atom. Both Mg(1)-Mg(1) bond lengths are 3.07 Å. Both Mg(1)-Mg(2) bond lengths are 2.95 Å. Both Mg(1)-Mg(3) bond lengths are 2.93 Å. Both Mg(1)-Mg(4) bond lengths are 2.94 Å. There is one shorter (2.98 Å) and one longer (3.03 Å) Mg(1)-Mn(1) bond length. The Mg(1)-C(1) bond length is 2.91 Å. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mn(1), and two equivalent C(1) atoms. There is one shorter (2.98 Å) and one longer (3.16 Å) Mg(2)-Mg(2) bond length. There is one shorter (2.93 Å) and one longer (3.08 Å) Mg(2)-Mg(3) bond length. There is one shorter (2.84 Å) and one longer (3.17 Å) Mg(2)-Mg(4) bond length. Both Mg(2)-Mn(1) bond lengths are 2.93 Å. Both Mg(2)-C(1) bond lengths are 2.90 Å. In the third Mg site, Mg(2) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mn(1), and two equivalent C(1) atoms. Both Mg(2)-Mg(1) bond lengths are 2.95 Å. There is one shorter (2.93 Å) and one longer (3.08 Å) Mg(2)-Mg(3) bond length. There is one shorter (2.84 Å) and one longer (3.17 Å) Mg(2)-Mg(4) bond length. Both Mg(2)-Mn(1) bond lengths are 2.93 Å. Both Mg(2)-C(1) bond lengths are 2.90 Å. In the fourth Mg site, Mg(3) is bonded to two equivalent Mg(4); four Mg(1,1); four Mg(2,2); and two equivalent Mn(1) atoms to form a mixture of distorted face and corner-sharing MgMg10Mn2 cuboctahedra. Both Mg(3)-Mg(4) bond lengths are 3.07 Å. Both Mg(3)-Mg(1) bond lengths are 2.93 Å. Both Mg(3)-Mn(1) bond lengths are 2.87 Å. In the fifth Mg site, Mg(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Mg(3); four equivalent Mg(1); four Mg(2,2); and two equivalent C(1) atoms. Both Mg(4)-C(1) bond lengths are 2.80 Å. In the sixth Mg site, Mg(1) is bonded in a 11-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mn(1), and one C(1) atom. Both Mg(1)-Mg(1) bond lengths are 3.07 Å. Both Mg(1)-Mg(2) bond lengths are 2.95 Å. Both Mg(1)-Mg(4) bond lengths are 2.94 Å. There is one shorter (2.98 Å) and one longer (3.03 Å) Mg(1)-Mn(1) bond length. The Mg(1)-C(1) bond length is 2.91 Å. Mn(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3); four Mg(1,1); and four Mg(2,2) atoms. C(1) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent Mg(4), and four equivalent Mg(2) atoms.