KMg6Fe crystallizes in the orthorhombic Amm2 space group. K(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(2), and two equivalent Fe(1) atoms to form distorted KMg10Fe2 cuboctahedra that share corners with four equivalent Fe(1)K2Mg10 cuboctahedra, corners with six equivalent K(1)Mg10Fe2 cuboctahedra, edges with two equivalent Fe(1)K2Mg10 cuboctahedra, faces with two equivalent K(1)Mg10Fe2 cuboctahedra, and faces with two equivalent Fe(1)K2Mg10 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(3), two equivalent Mg(4), and two equivalent Fe(1) atoms. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to two equivalent K(1), one Mg(4), two equivalent Mg(3), and two equivalent Fe(1) atoms. In the third Mg site, Mg(3) is bonded in a 10-coordinate geometry to four equivalent Mg(1), four equivalent Mg(2), and two equivalent Fe(1) atoms. In the fourth Mg site, Mg(4) is bonded in a 8-coordinate geometry to two equivalent K(1), two equivalent Mg(2), and four equivalent Mg(1) atoms. Fe(1) is bonded to two equivalent K(1), two equivalent Mg(3), four equivalent Mg(1), and four equivalent Mg(2) atoms to form distorted FeK2Mg10 cuboctahedra that share corners with four equivalent K(1)Mg10Fe2 cuboctahedra, corners with six equivalent Fe(1)K2Mg10 cuboctahedra, edges with two equivalent K(1)Mg10Fe2 cuboctahedra, faces with two equivalent K(1)Mg10Fe2 cuboctahedra, and faces with two equivalent Fe(1)K2Mg10 cuboctahedra.
KMg6Fe crystallizes in the orthorhombic Amm2 space group. K(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(2), and two equivalent Fe(1) atoms to form distorted KMg10Fe2 cuboctahedra that share corners with four equivalent Fe(1)K2Mg10 cuboctahedra, corners with six equivalent K(1)Mg10Fe2 cuboctahedra, edges with two equivalent Fe(1)K2Mg10 cuboctahedra, faces with two equivalent K(1)Mg10Fe2 cuboctahedra, and faces with two equivalent Fe(1)K2Mg10 cuboctahedra. Both K(1)-Mg(4) bond lengths are 3.36 Å. There are two shorter (3.19 Å) and two longer (3.28 Å) K(1)-Mg(1) bond lengths. All K(1)-Mg(2) bond lengths are 3.30 Å. Both K(1)-Fe(1) bond lengths are 3.55 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(3), two equivalent Mg(4), and two equivalent Fe(1) atoms. Both Mg(1)-Mg(3) bond lengths are 3.19 Å. Both Mg(1)-Mg(4) bond lengths are 3.12 Å. There is one shorter (2.99 Å) and one longer (3.48 Å) Mg(1)-Fe(1) bond length. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to two equivalent K(1), one Mg(4), two equivalent Mg(3), and two equivalent Fe(1) atoms. The Mg(2)-Mg(4) bond length is 3.04 Å. There is one shorter (3.05 Å) and one longer (3.43 Å) Mg(2)-Mg(3) bond length. Both Mg(2)-Fe(1) bond lengths are 2.97 Å. In the third Mg site, Mg(3) is bonded in a 10-coordinate geometry to four equivalent Mg(1), four equivalent Mg(2), and two equivalent Fe(1) atoms. Both Mg(3)-Fe(1) bond lengths are 3.41 Å. In the fourth Mg site, Mg(4) is bonded in a 8-coordinate geometry to two equivalent K(1), two equivalent Mg(2), and four equivalent Mg(1) atoms. Fe(1) is bonded to two equivalent K(1), two equivalent Mg(3), four equivalent Mg(1), and four equivalent Mg(2) atoms to form distorted FeK2Mg10 cuboctahedra that share corners with four equivalent K(1)Mg10Fe2 cuboctahedra, corners with six equivalent Fe(1)K2Mg10 cuboctahedra, edges with two equivalent K(1)Mg10Fe2 cuboctahedra, faces with two equivalent K(1)Mg10Fe2 cuboctahedra, and faces with two equivalent Fe(1)K2Mg10 cuboctahedra.