EuZn2Sn2 crystallizes in the tetragonal P4/nmm space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Zn(1), four equivalent Zn(2), four equivalent Sn(1), and four equivalent Sn(2) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to four equivalent Eu(1) and four equivalent Sn(2) atoms to form distorted ZnEu4Sn4 tetrahedra that share corners with twelve equivalent Sn(1)Eu4Zn4 tetrahedra, edges with two equivalent Sn(1)Eu4Zn4 tetrahedra, edges with four equivalent Zn(1)Eu4Sn4 tetrahedra, and faces with four equivalent Zn(1)Eu4Sn4 tetrahedra. In the second Zn site, Zn(2) is bonded in a 5-coordinate geometry to four equivalent Eu(1), one Sn(2), and four equivalent Sn(1) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to four equivalent Eu(1) and four equivalent Zn(2) atoms to form distorted SnEu4Zn4 tetrahedra that share corners with twelve equivalent Zn(1)Eu4Sn4 tetrahedra, edges with two equivalent Zn(1)Eu4Sn4 tetrahedra, edges with four equivalent Sn(1)Eu4Zn4 tetrahedra, and faces with four equivalent Sn(1)Eu4Zn4 tetrahedra. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Zn(2), and four equivalent Zn(1) atoms.
EuZn2Sn2 crystallizes in the tetragonal P4/nmm space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Zn(1), four equivalent Zn(2), four equivalent Sn(1), and four equivalent Sn(2) atoms. All Eu(1)-Zn(1) bond lengths are 3.61 Å. All Eu(1)-Zn(2) bond lengths are 3.54 Å. All Eu(1)-Sn(1) bond lengths are 3.72 Å. All Eu(1)-Sn(2) bond lengths are 3.51 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to four equivalent Eu(1) and four equivalent Sn(2) atoms to form distorted ZnEu4Sn4 tetrahedra that share corners with twelve equivalent Sn(1)Eu4Zn4 tetrahedra, edges with two equivalent Sn(1)Eu4Zn4 tetrahedra, edges with four equivalent Zn(1)Eu4Sn4 tetrahedra, and faces with four equivalent Zn(1)Eu4Sn4 tetrahedra. All Zn(1)-Sn(2) bond lengths are 2.76 Å. In the second Zn site, Zn(2) is bonded in a 5-coordinate geometry to four equivalent Eu(1), one Sn(2), and four equivalent Sn(1) atoms. The Zn(2)-Sn(2) bond length is 2.60 Å. All Zn(2)-Sn(1) bond lengths are 2.80 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to four equivalent Eu(1) and four equivalent Zn(2) atoms to form distorted SnEu4Zn4 tetrahedra that share corners with twelve equivalent Zn(1)Eu4Sn4 tetrahedra, edges with two equivalent Zn(1)Eu4Sn4 tetrahedra, edges with four equivalent Sn(1)Eu4Zn4 tetrahedra, and faces with four equivalent Sn(1)Eu4Zn4 tetrahedra. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Zn(2), and four equivalent Zn(1) atoms.