MgAg5 crystallizes in the hexagonal P-62m space group. Mg(1) is bonded to six equivalent Ag(1) and six equivalent Ag(2) atoms to form MgAg12 cuboctahedra that share corners with eighteen equivalent Ag(1)Mg3Ag9 cuboctahedra, edges with six equivalent Mg(1)Ag12 cuboctahedra, edges with twelve equivalent Ag(2)Mg2Ag10 cuboctahedra, faces with two equivalent Mg(1)Ag12 cuboctahedra, faces with six equivalent Ag(1)Mg3Ag9 cuboctahedra, and faces with twelve equivalent Ag(2)Mg2Ag10 cuboctahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to three equivalent Mg(1), three equivalent Ag(1), and six equivalent Ag(2) atoms to form distorted AgMg3Ag9 cuboctahedra that share corners with nine equivalent Mg(1)Ag12 cuboctahedra, corners with nine equivalent Ag(1)Mg3Ag9 cuboctahedra, edges with six equivalent Ag(1)Mg3Ag9 cuboctahedra, edges with twelve equivalent Ag(2)Mg2Ag10 cuboctahedra, faces with three equivalent Mg(1)Ag12 cuboctahedra, faces with five equivalent Ag(1)Mg3Ag9 cuboctahedra, and faces with twelve equivalent Ag(2)Mg2Ag10 cuboctahedra. In the second Ag site, Ag(2) is bonded to two equivalent Mg(1), four equivalent Ag(1), and six equivalent Ag(2) atoms to form distorted AgMg2Ag10 cuboctahedra that share corners with eighteen equivalent Ag(2)Mg2Ag10 cuboctahedra, edges with four equivalent Mg(1)Ag12 cuboctahedra, edges with six equivalent Ag(2)Mg2Ag10 cuboctahedra, edges with eight equivalent Ag(1)Mg3Ag9 cuboctahedra, faces with four equivalent Mg(1)Ag12 cuboctahedra, faces with eight equivalent Ag(2)Mg2Ag10 cuboctahedra, and faces with eight equivalent Ag(1)Mg3Ag9 cuboctahedra.
MgAg5 crystallizes in the hexagonal P-62m space group. Mg(1) is bonded to six equivalent Ag(1) and six equivalent Ag(2) atoms to form MgAg12 cuboctahedra that share corners with eighteen equivalent Ag(1)Mg3Ag9 cuboctahedra, edges with six equivalent Mg(1)Ag12 cuboctahedra, edges with twelve equivalent Ag(2)Mg2Ag10 cuboctahedra, faces with two equivalent Mg(1)Ag12 cuboctahedra, faces with six equivalent Ag(1)Mg3Ag9 cuboctahedra, and faces with twelve equivalent Ag(2)Mg2Ag10 cuboctahedra. All Mg(1)-Ag(1) bond lengths are 2.90 Å. All Mg(1)-Ag(2) bond lengths are 2.92 Å. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to three equivalent Mg(1), three equivalent Ag(1), and six equivalent Ag(2) atoms to form distorted AgMg3Ag9 cuboctahedra that share corners with nine equivalent Mg(1)Ag12 cuboctahedra, corners with nine equivalent Ag(1)Mg3Ag9 cuboctahedra, edges with six equivalent Ag(1)Mg3Ag9 cuboctahedra, edges with twelve equivalent Ag(2)Mg2Ag10 cuboctahedra, faces with three equivalent Mg(1)Ag12 cuboctahedra, faces with five equivalent Ag(1)Mg3Ag9 cuboctahedra, and faces with twelve equivalent Ag(2)Mg2Ag10 cuboctahedra. All Ag(1)-Ag(1) bond lengths are 2.90 Å. All Ag(1)-Ag(2) bond lengths are 2.92 Å. In the second Ag site, Ag(2) is bonded to two equivalent Mg(1), four equivalent Ag(1), and six equivalent Ag(2) atoms to form distorted AgMg2Ag10 cuboctahedra that share corners with eighteen equivalent Ag(2)Mg2Ag10 cuboctahedra, edges with four equivalent Mg(1)Ag12 cuboctahedra, edges with six equivalent Ag(2)Mg2Ag10 cuboctahedra, edges with eight equivalent Ag(1)Mg3Ag9 cuboctahedra, faces with four equivalent Mg(1)Ag12 cuboctahedra, faces with eight equivalent Ag(2)Mg2Ag10 cuboctahedra, and faces with eight equivalent Ag(1)Mg3Ag9 cuboctahedra. All Ag(2)-Ag(2) bond lengths are 2.90 Å.