KMg6Mn crystallizes in the orthorhombic Amm2 space group. K(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Mn(1) atoms to form KMg10Mn2 cuboctahedra that share corners with four equivalent Mg(4)K2Mg10 cuboctahedra, corners with six equivalent K(1)Mg10Mn2 cuboctahedra, edges with two equivalent Mg(4)K2Mg10 cuboctahedra, faces with two equivalent K(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mg(4)K2Mg10 cuboctahedra, and faces with six equivalent Mg(2)Mg10Mn2 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 3-coordinate geometry to two equivalent K(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and one Mn(1) atom. In the second Mg site, Mg(2) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Mn(1) atoms to form distorted MgMg10Mn2 cuboctahedra that share corners with six equivalent Mg(2)Mg10Mn2 cuboctahedra, edges with four equivalent Mg(4)K2Mg10 cuboctahedra, faces with two equivalent Mg(4)K2Mg10 cuboctahedra, faces with two equivalent Mg(2)Mg10Mn2 cuboctahedra, and faces with six equivalent K(1)Mg10Mn2 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 11-coordinate geometry to two equivalent K(1), one Mg(3), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), and two equivalent Mn(1) atoms. In the fourth Mg site, Mg(4) is bonded to two equivalent K(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form distorted MgK2Mg10 cuboctahedra that share corners with four equivalent K(1)Mg10Mn2 cuboctahedra, corners with six equivalent Mg(4)K2Mg10 cuboctahedra, edges with two equivalent K(1)Mg10Mn2 cuboctahedra, edges with four equivalent Mg(2)Mg10Mn2 cuboctahedra, faces with two equivalent K(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mg(4)K2Mg10 cuboctahedra, and faces with two equivalent Mg(2)Mg10Mn2 cuboctahedra. Mn(1) is bonded in a 10-coordinate geometry to two equivalent K(1), two equivalent Mg(1), two equivalent Mg(2), and four equivalent Mg(3) atoms.
KMg6Mn crystallizes in the orthorhombic Amm2 space group. K(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Mn(1) atoms to form KMg10Mn2 cuboctahedra that share corners with four equivalent Mg(4)K2Mg10 cuboctahedra, corners with six equivalent K(1)Mg10Mn2 cuboctahedra, edges with two equivalent Mg(4)K2Mg10 cuboctahedra, faces with two equivalent K(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mg(4)K2Mg10 cuboctahedra, and faces with six equivalent Mg(2)Mg10Mn2 cuboctahedra. Both K(1)-Mg(4) bond lengths are 3.29 Å. All K(1)-Mg(1) bond lengths are 3.30 Å. There are two shorter (3.17 Å) and two longer (3.48 Å) K(1)-Mg(3) bond lengths. Both K(1)-Mn(1) bond lengths are 3.47 Å. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 3-coordinate geometry to two equivalent K(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and one Mn(1) atom. There is one shorter (3.25 Å) and one longer (3.41 Å) Mg(1)-Mg(2) bond length. Both Mg(1)-Mg(3) bond lengths are 3.14 Å. Both Mg(1)-Mg(4) bond lengths are 3.16 Å. The Mg(1)-Mn(1) bond length is 2.74 Å. In the second Mg site, Mg(2) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Mn(1) atoms to form distorted MgMg10Mn2 cuboctahedra that share corners with six equivalent Mg(2)Mg10Mn2 cuboctahedra, edges with four equivalent Mg(4)K2Mg10 cuboctahedra, faces with two equivalent Mg(4)K2Mg10 cuboctahedra, faces with two equivalent Mg(2)Mg10Mn2 cuboctahedra, and faces with six equivalent K(1)Mg10Mn2 cuboctahedra. Both Mg(2)-Mg(4) bond lengths are 3.18 Å. All Mg(2)-Mg(3) bond lengths are 3.23 Å. Both Mg(2)-Mn(1) bond lengths are 3.31 Å. In the third Mg site, Mg(3) is bonded in a 11-coordinate geometry to two equivalent K(1), one Mg(3), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), and two equivalent Mn(1) atoms. The Mg(3)-Mg(3) bond length is 2.95 Å. There is one shorter (3.31 Å) and one longer (3.34 Å) Mg(3)-Mg(4) bond length. Both Mg(3)-Mn(1) bond lengths are 2.97 Å. In the fourth Mg site, Mg(4) is bonded to two equivalent K(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form distorted MgK2Mg10 cuboctahedra that share corners with four equivalent K(1)Mg10Mn2 cuboctahedra, corners with six equivalent Mg(4)K2Mg10 cuboctahedra, edges with two equivalent K(1)Mg10Mn2 cuboctahedra, edges with four equivalent Mg(2)Mg10Mn2 cuboctahedra, faces with two equivalent K(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mg(4)K2Mg10 cuboctahedra, and faces with two equivalent Mg(2)Mg10Mn2 cuboctahedra. Mn(1) is bonded in a 10-coordinate geometry to two equivalent K(1), two equivalent Mg(1), two equivalent Mg(2), and four equivalent Mg(3) atoms.