Eu2Zn2P3 crystallizes in the monoclinic C2/m space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to one P(2), two equivalent P(1), and three equivalent P(3) atoms to form distorted EuP6 octahedra that share corners with three equivalent Zn(1)Eu2P4 tetrahedra, corners with four equivalent Zn(2)EuP4 tetrahedra, edges with four equivalent Eu(1)P6 octahedra, edges with two equivalent Zn(2)EuP4 tetrahedra, and edges with three equivalent Zn(1)Eu2P4 tetrahedra. In the second Eu site, Eu(2) is bonded in a 10-coordinate geometry to one Zn(2), two equivalent Zn(1), three equivalent P(2), and four equivalent P(1) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Eu(2), one P(1), one P(2), and two equivalent P(3) atoms to form distorted ZnEu2P4 tetrahedra that share corners with three equivalent Eu(1)P6 octahedra, corners with two equivalent Zn(2)EuP4 tetrahedra, edges with three equivalent Eu(1)P6 octahedra, edges with two equivalent Zn(1)Eu2P4 tetrahedra, and faces with two equivalent Zn(2)EuP4 tetrahedra. The corner-sharing octahedral tilt angles range from 20-49°. In the second Zn site, Zn(2) is bonded to one Eu(2), two equivalent P(2), and two equivalent P(3) atoms to form distorted ZnEuP4 tetrahedra that share corners with four equivalent Eu(1)P6 octahedra, corners with two equivalent Zn(1)Eu2P4 tetrahedra, corners with two equivalent Zn(2)EuP4 tetrahedra, edges with two equivalent Eu(1)P6 octahedra,  an edgeedge with one Zn(2)EuP4 tetrahedra, and faces with two equivalent Zn(1)Eu2P4 tetrahedra. The corner-sharing octahedral tilt angles range from 23-55°. There are three inequivalent P sites. In the first P site, P(1) is bonded in a 8-coordinate geometry to two equivalent Eu(1), four equivalent Eu(2), one Zn(1), and one P(1) atom. In the second P site, P(2) is bonded in a 7-coordinate geometry to one Eu(1), three equivalent Eu(2), one Zn(1), and two equivalent Zn(2) atoms. In the third P site, P(3) is bonded in a 7-coordinate geometry to three equivalent Eu(1), two equivalent Zn(1), and two equivalent Zn(2) atoms.
Eu2Zn2P3 crystallizes in the monoclinic C2/m space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to one P(2), two equivalent P(1), and three equivalent P(3) atoms to form distorted EuP6 octahedra that share corners with three equivalent Zn(1)Eu2P4 tetrahedra, corners with four equivalent Zn(2)EuP4 tetrahedra, edges with four equivalent Eu(1)P6 octahedra, edges with two equivalent Zn(2)EuP4 tetrahedra, and edges with three equivalent Zn(1)Eu2P4 tetrahedra. The Eu(1)-P(2) bond length is 2.97 Å. Both Eu(1)-P(1) bond lengths are 3.01 Å. There is one shorter (2.93 Å) and two longer (2.98 Å) Eu(1)-P(3) bond lengths. In the second Eu site, Eu(2) is bonded in a 10-coordinate geometry to one Zn(2), two equivalent Zn(1), three equivalent P(2), and four equivalent P(1) atoms. The Eu(2)-Zn(2) bond length is 3.28 Å. Both Eu(2)-Zn(1) bond lengths are 3.25 Å. There are two shorter (3.04 Å) and one longer (3.05 Å) Eu(2)-P(2) bond length. There are two shorter (3.08 Å) and two longer (3.16 Å) Eu(2)-P(1) bond lengths. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Eu(2), one P(1), one P(2), and two equivalent P(3) atoms to form distorted ZnEu2P4 tetrahedra that share corners with three equivalent Eu(1)P6 octahedra, corners with two equivalent Zn(2)EuP4 tetrahedra, edges with three equivalent Eu(1)P6 octahedra, edges with two equivalent Zn(1)Eu2P4 tetrahedra, and faces with two equivalent Zn(2)EuP4 tetrahedra. The corner-sharing octahedral tilt angles range from 20-49°. The Zn(1)-P(1) bond length is 2.58 Å. The Zn(1)-P(2) bond length is 2.46 Å. Both Zn(1)-P(3) bond lengths are 2.45 Å. In the second Zn site, Zn(2) is bonded to one Eu(2), two equivalent P(2), and two equivalent P(3) atoms to form distorted ZnEuP4 tetrahedra that share corners with four equivalent Eu(1)P6 octahedra, corners with two equivalent Zn(1)Eu2P4 tetrahedra, corners with two equivalent Zn(2)EuP4 tetrahedra, edges with two equivalent Eu(1)P6 octahedra,  an edgeedge with one Zn(2)EuP4 tetrahedra, and faces with two equivalent Zn(1)Eu2P4 tetrahedra. The corner-sharing octahedral tilt angles range from 23-55°. Both Zn(2)-P(2) bond lengths are 2.45 Å. There is one shorter (2.42 Å) and one longer (2.60 Å) Zn(2)-P(3) bond length. There are three inequivalent P sites. In the first P site, P(1) is bonded in a 8-coordinate geometry to two equivalent Eu(1), four equivalent Eu(2), one Zn(1), and one P(1) atom. The P(1)-P(1) bond length is 2.28 Å. In the second P site, P(2) is bonded in a 7-coordinate geometry to one Eu(1), three equivalent Eu(2), one Zn(1), and two equivalent Zn(2) atoms. In the third P site, P(3) is bonded in a 7-coordinate geometry to three equivalent Eu(1), two equivalent Zn(1), and two equivalent Zn(2) atoms.