MgEu2TiO4 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a bent 150 degrees geometry to two equivalent O(2) atoms. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. Ti(1) is bonded to one O(1), two equivalent O(3), and two equivalent O(4) atoms to form corner-sharing TiO5 square pyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to four equivalent Eu(2) and one Ti(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Eu(2), and two equivalent Eu(1) atoms. In the third O site, O(3) is bonded to two equivalent Eu(1), two equivalent Eu(2), and two equivalent Ti(1) atoms to form a mixture of distorted face, corner, and edge-sharing OEu4Ti2 octahedra. The corner-sharing octahedral tilt angles are 13°. In the fourth O site, O(4) is bonded to two equivalent Eu(1), two equivalent Eu(2), and two equivalent Ti(1) atoms to form a mixture of distorted face, corner, and edge-sharing OEu4Ti2 octahedra. The corner-sharing octahedral tilt angles are 11°.
MgEu2TiO4 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a bent 150 degrees geometry to two equivalent O(2) atoms. Both Mg(1)-O(2) bond lengths are 2.01 Å. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Eu(1)-O(2) bond lengths are 2.83 Å. Both Eu(1)-O(3) bond lengths are 2.59 Å. Both Eu(1)-O(4) bond lengths are 2.65 Å. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. The Eu(2)-O(2) bond length is 2.37 Å. Both Eu(2)-O(3) bond lengths are 2.75 Å. There is one shorter (2.74 Å) and one longer (2.76 Å) Eu(2)-O(4) bond length. There are two shorter (2.75 Å) and two longer (2.81 Å) Eu(2)-O(1) bond lengths. Ti(1) is bonded to one O(1), two equivalent O(3), and two equivalent O(4) atoms to form corner-sharing TiO5 square pyramids. The Ti(1)-O(1) bond length is 1.89 Å. There is one shorter (1.99 Å) and one longer (2.00 Å) Ti(1)-O(3) bond length. Both Ti(1)-O(4) bond lengths are 1.95 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to four equivalent Eu(2) and one Ti(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Eu(2), and two equivalent Eu(1) atoms. In the third O site, O(3) is bonded to two equivalent Eu(1), two equivalent Eu(2), and two equivalent Ti(1) atoms to form a mixture of distorted face, corner, and edge-sharing OEu4Ti2 octahedra. The corner-sharing octahedral tilt angles are 13°. In the fourth O site, O(4) is bonded to two equivalent Eu(1), two equivalent Eu(2), and two equivalent Ti(1) atoms to form a mixture of distorted face, corner, and edge-sharing OEu4Ti2 octahedra. The corner-sharing octahedral tilt angles are 11°.