Cs2MgCl4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 8-coordinate geometry to one Cl(2), three equivalent Cl(3), and four equivalent Cl(1) atoms. In the second Cs site, Cs(2) is bonded in a 9-coordinate geometry to two equivalent Cl(3), three equivalent Cl(2), and four equivalent Cl(1) atoms. Mg(1) is bonded in a tetrahedral geometry to one Cl(2), one Cl(3), and two equivalent Cl(1) atoms. There are three inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted single-bond geometry to two equivalent Cs(1), two equivalent Cs(2), and one Mg(1) atom. In the second Cl site, Cl(2) is bonded in a distorted single-bond geometry to one Cs(1), three equivalent Cs(2), and one Mg(1) atom. In the third Cl site, Cl(3) is bonded in a distorted single-bond geometry to two equivalent Cs(2), three equivalent Cs(1), and one Mg(1) atom.
Cs2MgCl4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 8-coordinate geometry to one Cl(2), three equivalent Cl(3), and four equivalent Cl(1) atoms. The Cs(1)-Cl(2) bond length is 3.54 Å. There are two shorter (3.77 Å) and one longer (3.89 Å) Cs(1)-Cl(3) bond length. All Cs(1)-Cl(1) bond lengths are 3.70 Å. In the second Cs site, Cs(2) is bonded in a 9-coordinate geometry to two equivalent Cl(3), three equivalent Cl(2), and four equivalent Cl(1) atoms. There is one shorter (3.50 Å) and one longer (3.53 Å) Cs(2)-Cl(3) bond length. There is one shorter (3.59 Å) and two longer (3.93 Å) Cs(2)-Cl(2) bond lengths. There are two shorter (3.50 Å) and two longer (3.53 Å) Cs(2)-Cl(1) bond lengths. Mg(1) is bonded in a tetrahedral geometry to one Cl(2), one Cl(3), and two equivalent Cl(1) atoms. The Mg(1)-Cl(2) bond length is 2.32 Å. The Mg(1)-Cl(3) bond length is 2.34 Å. Both Mg(1)-Cl(1) bond lengths are 2.32 Å. There are three inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted single-bond geometry to two equivalent Cs(1), two equivalent Cs(2), and one Mg(1) atom. In the second Cl site, Cl(2) is bonded in a distorted single-bond geometry to one Cs(1), three equivalent Cs(2), and one Mg(1) atom. In the third Cl site, Cl(3) is bonded in a distorted single-bond geometry to two equivalent Cs(2), three equivalent Cs(1), and one Mg(1) atom.