MgEuF4 crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded to two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms to form corner-sharing MgF6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. Eu(1) is bonded in a 8-coordinate geometry to two equivalent F(3) and six equivalent F(2) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded in a linear geometry to two equivalent Mg(1) atoms. In the second F site, F(2) is bonded to one Mg(1) and three equivalent Eu(1) atoms to form a mixture of distorted edge and corner-sharing FEu3Mg tetrahedra. In the third F site, F(3) is bonded in a distorted linear geometry to two equivalent Mg(1) and two equivalent Eu(1) atoms.
MgEuF4 crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded to two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms to form corner-sharing MgF6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. Both Mg(1)-F(1) bond lengths are 1.93 Å. Both Mg(1)-F(2) bond lengths are 2.02 Å. Both Mg(1)-F(3) bond lengths are 2.05 Å. Eu(1) is bonded in a 8-coordinate geometry to two equivalent F(3) and six equivalent F(2) atoms. Both Eu(1)-F(3) bond lengths are 2.97 Å. There are four shorter (2.51 Å) and two longer (2.59 Å) Eu(1)-F(2) bond lengths. There are three inequivalent F sites. In the first F site, F(1) is bonded in a linear geometry to two equivalent Mg(1) atoms. In the second F site, F(2) is bonded to one Mg(1) and three equivalent Eu(1) atoms to form a mixture of distorted edge and corner-sharing FEu3Mg tetrahedra. In the third F site, F(3) is bonded in a distorted linear geometry to two equivalent Mg(1) and two equivalent Eu(1) atoms.