RbMg6Ni crystallizes in the orthorhombic Amm2 space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3), two equivalent Mg(4), four equivalent Mg(1), and two equivalent Ni(1) atoms. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a single-bond geometry to two equivalent Rb(1), two equivalent Mg(4), and one Ni(1) atom. In the second Mg site, Mg(2) is bonded in a 8-coordinate geometry to two equivalent Mg(4), four equivalent Mg(3), and two equivalent Ni(1) atoms. In the third Mg site, Mg(3) is bonded in a 2-coordinate geometry to one Rb(1), two equivalent Mg(2), and two equivalent Ni(1) atoms. In the fourth Mg site, Mg(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1), two equivalent Mg(2), and four equivalent Mg(1) atoms. Ni(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Mg(1), two equivalent Mg(2), and four equivalent Mg(3) atoms.
RbMg6Ni crystallizes in the orthorhombic Amm2 space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3), two equivalent Mg(4), four equivalent Mg(1), and two equivalent Ni(1) atoms. Both Rb(1)-Mg(3) bond lengths are 3.38 Å. Both Rb(1)-Mg(4) bond lengths are 3.27 Å. All Rb(1)-Mg(1) bond lengths are 3.77 Å. Both Rb(1)-Ni(1) bond lengths are 3.63 Å. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a single-bond geometry to two equivalent Rb(1), two equivalent Mg(4), and one Ni(1) atom. Both Mg(1)-Mg(4) bond lengths are 3.23 Å. The Mg(1)-Ni(1) bond length is 2.59 Å. In the second Mg site, Mg(2) is bonded in a 8-coordinate geometry to two equivalent Mg(4), four equivalent Mg(3), and two equivalent Ni(1) atoms. Both Mg(2)-Mg(4) bond lengths are 3.33 Å. All Mg(2)-Mg(3) bond lengths are 3.11 Å. Both Mg(2)-Ni(1) bond lengths are 3.40 Å. In the third Mg site, Mg(3) is bonded in a 2-coordinate geometry to one Rb(1), two equivalent Mg(2), and two equivalent Ni(1) atoms. Both Mg(3)-Ni(1) bond lengths are 2.71 Å. In the fourth Mg site, Mg(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1), two equivalent Mg(2), and four equivalent Mg(1) atoms. Ni(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Mg(1), two equivalent Mg(2), and four equivalent Mg(3) atoms.