Mg(MnGe)6 crystallizes in the hexagonal P6/mmm space group. Mg(1) is bonded to two equivalent Ge(1) and six equivalent Ge(3) atoms to form distorted edge-sharing MgGe8 hexagonal bipyramids. Mn(1) is bonded in a 6-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Mg(1), six equivalent Mn(1), and one Ge(1) atom. In the second Ge site, Ge(2) is bonded in a 6-coordinate geometry to six equivalent Mn(1) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Mn(1) atoms.
Mg(MnGe)6 crystallizes in the hexagonal P6/mmm space group. Mg(1) is bonded to two equivalent Ge(1) and six equivalent Ge(3) atoms to form distorted edge-sharing MgGe8 hexagonal bipyramids. Both Mg(1)-Ge(1) bond lengths are 2.72 Å. All Mg(1)-Ge(3) bond lengths are 2.97 Å. Mn(1) is bonded in a 6-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. Both Mn(1)-Ge(1) bond lengths are 2.66 Å. Both Mn(1)-Ge(2) bond lengths are 2.51 Å. Both Mn(1)-Ge(3) bond lengths are 2.52 Å. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Mg(1), six equivalent Mn(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.67 Å. In the second Ge site, Ge(2) is bonded in a 6-coordinate geometry to six equivalent Mn(1) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Mn(1) atoms.