Ta2CrNO5 is Hydrophilite-derived structured and crystallizes in the orthorhombic Pmn2_1 space group. Ta(1) is bonded to one N(1), one O(1), two equivalent O(2), and two equivalent O(3) atoms to form TaNO5 octahedra that share corners with four equivalent Ta(1)NO5 octahedra, corners with four equivalent Cr(1)NO5 octahedra,  an edgeedge with one Ta(1)NO5 octahedra, and  an edgeedge with one Cr(1)NO5 octahedra. The corner-sharing octahedral tilt angles range from 46-52°. Cr(1) is bonded to one N(1), one O(1), two equivalent O(2), and two equivalent O(3) atoms to form CrNO5 octahedra that share corners with eight equivalent Ta(1)NO5 octahedra and edges with two equivalent Ta(1)NO5 octahedra. The corner-sharing octahedral tilt angles range from 47-52°. N(1) is bonded in a trigonal planar geometry to two equivalent Ta(1) and one Cr(1) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Cr(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Ta(1) and one Cr(1) atom.
Ta2CrNO5 is Hydrophilite-derived structured and crystallizes in the orthorhombic Pmn2_1 space group. Ta(1) is bonded to one N(1), one O(1), two equivalent O(2), and two equivalent O(3) atoms to form TaNO5 octahedra that share corners with four equivalent Ta(1)NO5 octahedra, corners with four equivalent Cr(1)NO5 octahedra,  an edgeedge with one Ta(1)NO5 octahedra, and  an edgeedge with one Cr(1)NO5 octahedra. The corner-sharing octahedral tilt angles range from 46-52°. The Ta(1)-N(1) bond length is 1.95 Å. The Ta(1)-O(1) bond length is 2.04 Å. There is one shorter (1.99 Å) and one longer (2.11 Å) Ta(1)-O(2) bond length. There is one shorter (1.99 Å) and one longer (2.09 Å) Ta(1)-O(3) bond length. Cr(1) is bonded to one N(1), one O(1), two equivalent O(2), and two equivalent O(3) atoms to form CrNO5 octahedra that share corners with eight equivalent Ta(1)NO5 octahedra and edges with two equivalent Ta(1)NO5 octahedra. The corner-sharing octahedral tilt angles range from 47-52°. The Cr(1)-N(1) bond length is 2.04 Å. The Cr(1)-O(1) bond length is 2.06 Å. Both Cr(1)-O(2) bond lengths are 2.05 Å. Both Cr(1)-O(3) bond lengths are 2.06 Å. N(1) is bonded in a trigonal planar geometry to two equivalent Ta(1) and one Cr(1) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Cr(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Ta(1) and one Cr(1) atom.