Er2Mg crystallizes in the orthorhombic Fmmm space group. Mg(1) is bonded to four equivalent Mg(1) and eight equivalent Er(1) atoms to form a mixture of distorted face and corner-sharing MgEr8Mg4 cuboctahedra. Er(1) is bonded in a 8-coordinate geometry to four equivalent Mg(1) and six equivalent Er(1) atoms.
Er2Mg crystallizes in the orthorhombic Fmmm space group. Mg(1) is bonded to four equivalent Mg(1) and eight equivalent Er(1) atoms to form a mixture of distorted face and corner-sharing MgEr8Mg4 cuboctahedra. All Mg(1)-Mg(1) bond lengths are 3.34 Å. There are four shorter (3.32 Å) and four longer (3.80 Å) Mg(1)-Er(1) bond lengths. Er(1) is bonded in a 8-coordinate geometry to four equivalent Mg(1) and six equivalent Er(1) atoms. There are four shorter (3.34 Å) and two longer (3.38 Å) Er(1)-Er(1) bond lengths.