RbMg6Sn crystallizes in the orthorhombic Amm2 space group. Rb(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Sn(1) atoms to form a mixture of face and corner-sharing RbMg10Sn2 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 3-coordinate geometry to two equivalent Rb(1), two equivalent Mg(3), two equivalent Mg(4), and one Sn(1) atom. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to two equivalent Mg(4) and four equivalent Mg(3) atoms. In the third Mg site, Mg(3) is bonded in a 10-coordinate geometry to two equivalent Rb(1), one Mg(3), one Mg(4), two equivalent Mg(1), two equivalent Mg(2), and two equivalent Sn(1) atoms. In the fourth Mg site, Mg(4) is bonded in a 10-coordinate geometry to two equivalent Rb(1), two equivalent Mg(2), two equivalent Mg(3), and four equivalent Mg(1) atoms. Sn(1) is bonded in a 8-coordinate geometry to two equivalent Rb(1), two equivalent Mg(1), and four equivalent Mg(3) atoms.
RbMg6Sn crystallizes in the orthorhombic Amm2 space group. Rb(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Sn(1) atoms to form a mixture of face and corner-sharing RbMg10Sn2 cuboctahedra. Both Rb(1)-Mg(4) bond lengths are 3.53 Å. All Rb(1)-Mg(1) bond lengths are 3.48 Å. There are two shorter (3.51 Å) and two longer (3.54 Å) Rb(1)-Mg(3) bond lengths. Both Rb(1)-Sn(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 Rb(1), two equivalent Mg(3), two equivalent Mg(4), and one Sn(1) atom. Both Mg(1)-Mg(3) bond lengths are 3.23 Å. Both Mg(1)-Mg(4) bond lengths are 3.21 Å. The Mg(1)-Sn(1) bond length is 3.08 Å. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to two equivalent Mg(4) and four equivalent Mg(3) atoms. Both Mg(2)-Mg(4) bond lengths are 3.34 Å. All Mg(2)-Mg(3) bond lengths are 3.35 Å. In the third Mg site, Mg(3) is bonded in a 10-coordinate geometry to two equivalent Rb(1), one Mg(3), one Mg(4), two equivalent Mg(1), two equivalent Mg(2), and two equivalent Sn(1) atoms. The Mg(3)-Mg(3) bond length is 3.41 Å. The Mg(3)-Mg(4) bond length is 3.42 Å. Both Mg(3)-Sn(1) bond lengths are 3.22 Å. In the fourth Mg site, Mg(4) is bonded in a 10-coordinate geometry to two equivalent Rb(1), two equivalent Mg(2), two equivalent Mg(3), and four equivalent Mg(1) atoms. Sn(1) is bonded in a 8-coordinate geometry to two equivalent Rb(1), two equivalent Mg(1), and four equivalent Mg(3) atoms.