BaMgTe2O7 crystallizes in the orthorhombic Ama2 space group. Ba(1) is bonded in a 10-coordinate geometry to two equivalent O(3), four equivalent O(4), and four equivalent O(5) atoms. Mg(1) is bonded to one O(2), two equivalent O(4), and two equivalent O(5) atoms to form distorted MgO5 trigonal bipyramids that share corners with three equivalent Te(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-60°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(4) atoms. In the second Te site, Te(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(5) atoms to form TeO6 octahedra that share corners with two equivalent Te(2)O6 octahedra and corners with three equivalent Mg(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 49°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Te(2) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Mg(1), one Te(1), and one Te(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Te(1), and one Te(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Mg(1), and one Te(1) atom. In the fifth O site, O(5) is bonded to two equivalent Ba(1), one Mg(1), and one Te(2) atom to form a mixture of distorted corner and edge-sharing OBa2MgTe tetrahedra.
BaMgTe2O7 crystallizes in the orthorhombic Ama2 space group. Ba(1) is bonded in a 10-coordinate geometry to two equivalent O(3), four equivalent O(4), and four equivalent O(5) atoms. Both Ba(1)-O(3) bond lengths are 3.03 Å. There are two shorter (2.86 Å) and two longer (3.05 Å) Ba(1)-O(4) bond lengths. There are two shorter (2.82 Å) and two longer (2.88 Å) Ba(1)-O(5) bond lengths. Mg(1) is bonded to one O(2), two equivalent O(4), and two equivalent O(5) atoms to form distorted MgO5 trigonal bipyramids that share corners with three equivalent Te(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-60°. The Mg(1)-O(2) bond length is 2.05 Å. Both Mg(1)-O(4) bond lengths are 2.08 Å. Both Mg(1)-O(5) bond lengths are 2.04 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(4) atoms. The Te(1)-O(2) bond length is 2.33 Å. The Te(1)-O(3) bond length is 2.04 Å. Both Te(1)-O(4) bond lengths are 1.87 Å. In the second Te site, Te(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(5) atoms to form TeO6 octahedra that share corners with two equivalent Te(2)O6 octahedra and corners with three equivalent Mg(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 49°. The Te(2)-O(2) bond length is 1.94 Å. The Te(2)-O(3) bond length is 2.00 Å. Both Te(2)-O(1) bond lengths are 2.05 Å. Both Te(2)-O(5) bond lengths are 1.91 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Te(2) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Mg(1), one Te(1), and one Te(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Te(1), and one Te(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Mg(1), and one Te(1) atom. In the fifth O site, O(5) is bonded to two equivalent Ba(1), one Mg(1), and one Te(2) atom to form a mixture of distorted corner and edge-sharing OBa2MgTe tetrahedra.