SrCuTe2O7 crystallizes in the orthorhombic Pbcm space group. Sr(1) is bonded in a 10-coordinate geometry to two equivalent O(1), four equivalent O(2), and four equivalent O(4) atoms. Cu(1) is bonded to one O(3), two equivalent O(2), and two equivalent O(4) atoms to form distorted CuO5 square pyramids that share corners with three equivalent Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-59°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(1), one O(3), two equivalent O(4), and two equivalent O(5) atoms to form TeO6 octahedra that share corners with two equivalent Te(1)O6 octahedra and corners with three equivalent Cu(1)O5 square pyramids. The corner-sharing octahedral tilt angles are 48°. In the second Te site, Te(2) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), and two equivalent O(2) atoms. There are five inequivalent O sites. In the first O site, O(4) is bonded to two equivalent Sr(1), one Cu(1), and one Te(1) atom to form a mixture of distorted corner and edge-sharing OSr2CuTe tetrahedra. In the second O site, O(5) is bonded in a bent 120 degrees geometry to two equivalent Te(1) atoms. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Sr(1), one Te(1), and one Te(2) atom. In the fourth O site, O(2) is bonded in a 2-coordinate geometry to two equivalent Sr(1), one Cu(1), and one Te(2) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Cu(1), one Te(1), and one Te(2) atom.
SrCuTe2O7 crystallizes in the orthorhombic Pbcm space group. Sr(1) is bonded in a 10-coordinate geometry to two equivalent O(1), four equivalent O(2), and four equivalent O(4) atoms. Both Sr(1)-O(1) bond lengths are 2.96 Å. There are two shorter (2.77 Å) and two longer (3.11 Å) Sr(1)-O(2) bond lengths. All Sr(1)-O(4) bond lengths are 2.69 Å. Cu(1) is bonded to one O(3), two equivalent O(2), and two equivalent O(4) atoms to form distorted CuO5 square pyramids that share corners with three equivalent Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-59°. The Cu(1)-O(3) bond length is 2.42 Å. Both Cu(1)-O(2) bond lengths are 1.97 Å. Both Cu(1)-O(4) bond lengths are 1.96 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(1), one O(3), two equivalent O(4), and two equivalent O(5) atoms to form TeO6 octahedra that share corners with two equivalent Te(1)O6 octahedra and corners with three equivalent Cu(1)O5 square pyramids. The corner-sharing octahedral tilt angles are 48°. The Te(1)-O(1) bond length is 1.97 Å. The Te(1)-O(3) bond length is 1.93 Å. Both Te(1)-O(4) bond lengths are 1.94 Å. Both Te(1)-O(5) bond lengths are 2.02 Å. In the second Te site, Te(2) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), and two equivalent O(2) atoms. The Te(2)-O(1) bond length is 2.08 Å. The Te(2)-O(3) bond length is 2.14 Å. Both Te(2)-O(2) bond lengths are 1.90 Å. There are five inequivalent O sites. In the first O site, O(4) is bonded to two equivalent Sr(1), one Cu(1), and one Te(1) atom to form a mixture of distorted corner and edge-sharing OSr2CuTe tetrahedra. In the second O site, O(5) is bonded in a bent 120 degrees geometry to two equivalent Te(1) atoms. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Sr(1), one Te(1), and one Te(2) atom. In the fourth O site, O(2) is bonded in a 2-coordinate geometry to two equivalent Sr(1), one Cu(1), and one Te(2) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Cu(1), one Te(1), and one Te(2) atom.