EuMg2 is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to six equivalent Mg(2) and six equivalent Eu(1) atoms to form a mixture of edge, corner, and face-sharing MgEu6Mg6 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1), four equivalent Mg(2), and six equivalent Eu(1) atoms to form a mixture of edge, corner, and face-sharing MgEu6Mg6 cuboctahedra. Eu(1) is bonded in a 16-coordinate geometry to three equivalent Mg(1), nine equivalent Mg(2), and four equivalent Eu(1) atoms.
EuMg2 is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to six equivalent Mg(2) and six equivalent Eu(1) atoms to form a mixture of edge, corner, and face-sharing MgEu6Mg6 cuboctahedra. All Mg(1)-Mg(2) bond lengths are 3.14 Å. All Mg(1)-Eu(1) bond lengths are 3.70 Å. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1), four equivalent Mg(2), and six equivalent Eu(1) atoms to form a mixture of edge, corner, and face-sharing MgEu6Mg6 cuboctahedra. There are two shorter (3.15 Å) and two longer (3.17 Å) Mg(2)-Mg(2) bond lengths. There are two shorter (3.66 Å) and four longer (3.70 Å) Mg(2)-Eu(1) bond lengths. Eu(1) is bonded in a 16-coordinate geometry to three equivalent Mg(1), nine equivalent Mg(2), and four equivalent Eu(1) atoms. There are three shorter (3.85 Å) and one longer (3.86 Å) Eu(1)-Eu(1) bond length.