Fe2TeO5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form a mixture of corner and edge-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 26-56°. In the second Fe site, Fe(2) is bonded to one O(2), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form a mixture of corner and edge-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 26-56°. Te(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(5), and two equivalent O(4) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Fe(1), two equivalent Fe(2), and one Te(1) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Fe(1), one Fe(2), and one Te(1) atom. In the third O site, O(3) is bonded to two equivalent Fe(1) and two equivalent Fe(2) atoms to form edge-sharing OFe4 trigonal pyramids. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Fe(1) and two equivalent Te(1) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Fe(1), one Fe(2), and one Te(1) atom.
Fe2TeO5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form a mixture of corner and edge-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 26-56°. The Fe(1)-O(1) bond length is 2.01 Å. The Fe(1)-O(2) bond length is 2.09 Å. The Fe(1)-O(4) bond length is 2.02 Å. The Fe(1)-O(5) bond length is 2.02 Å. There is one shorter (2.04 Å) and one longer (2.10 Å) Fe(1)-O(3) bond length. In the second Fe site, Fe(2) is bonded to one O(2), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form a mixture of corner and edge-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 26-56°. The Fe(2)-O(2) bond length is 2.10 Å. The Fe(2)-O(5) bond length is 2.17 Å. There is one shorter (1.97 Å) and one longer (2.02 Å) Fe(2)-O(1) bond length. There is one shorter (2.04 Å) and one longer (2.06 Å) Fe(2)-O(3) bond length. Te(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(5), and two equivalent O(4) atoms. The Te(1)-O(1) bond length is 2.58 Å. The Te(1)-O(2) bond length is 1.99 Å. The Te(1)-O(5) bond length is 1.90 Å. There is one shorter (1.93 Å) and one longer (2.63 Å) Te(1)-O(4) bond length. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Fe(1), two equivalent Fe(2), and one Te(1) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Fe(1), one Fe(2), and one Te(1) atom. In the third O site, O(3) is bonded to two equivalent Fe(1) and two equivalent Fe(2) atoms to form edge-sharing OFe4 trigonal pyramids. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Fe(1) and two equivalent Te(1) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Fe(1), one Fe(2), and one Te(1) atom.