NaMg6C crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), and four equivalent Mg(3) atoms. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a water-like geometry to one Na(1), two equivalent Mg(4), and two equivalent C(1) atoms. In the second Mg site, Mg(2) is bonded to two equivalent Na(1), two equivalent Mg(4), and four equivalent Mg(3) atoms to form a mixture of distorted corner and face-sharing MgNa2Mg6 hexagonal bipyramids. In the third Mg site, Mg(3) is bonded in a single-bond geometry to two equivalent Na(1), two equivalent Mg(2), and one C(1) atom. In the fourth Mg site, Mg(4) is bonded in a 6-coordinate geometry to two equivalent Mg(2) and four equivalent Mg(1) atoms. C(1) is bonded in a 6-coordinate geometry to two equivalent Mg(3) and four equivalent Mg(1) atoms.
NaMg6C crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), and four equivalent Mg(3) atoms. Both Na(1)-Mg(1) bond lengths are 3.30 Å. Both Na(1)-Mg(2) bond lengths are 3.44 Å. All Na(1)-Mg(3) bond lengths are 3.34 Å. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a water-like geometry to one Na(1), two equivalent Mg(4), and two equivalent C(1) atoms. Both Mg(1)-Mg(4) bond lengths are 2.94 Å. Both Mg(1)-C(1) bond lengths are 2.29 Å. In the second Mg site, Mg(2) is bonded to two equivalent Na(1), two equivalent Mg(4), and four equivalent Mg(3) atoms to form a mixture of distorted corner and face-sharing MgNa2Mg6 hexagonal bipyramids. Both Mg(2)-Mg(4) bond lengths are 2.97 Å. All Mg(2)-Mg(3) bond lengths are 3.09 Å. In the third Mg site, Mg(3) is bonded in a single-bond geometry to two equivalent Na(1), two equivalent Mg(2), and one C(1) atom. The Mg(3)-C(1) bond length is 2.40 Å. In the fourth Mg site, Mg(4) is bonded in a 6-coordinate geometry to two equivalent Mg(2) and four equivalent Mg(1) atoms. C(1) is bonded in a 6-coordinate geometry to two equivalent Mg(3) and four equivalent Mg(1) atoms.