CrTa2O6 is Hydrophilite-derived structured and crystallizes in the monoclinic P2_1/c space group. Ta(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form TaO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra, corners with four equivalent Cr(1)O6 octahedra,  an edgeedge with one Ta(1)O6 octahedra, and  an edgeedge with one Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-55°. Cr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CrO6 octahedra that share corners with eight equivalent Ta(1)O6 octahedra and edges with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-55°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Ta(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Ta(1) and one Cr(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Cr(1) atom.
CrTa2O6 is Hydrophilite-derived structured and crystallizes in the monoclinic P2_1/c space group. Ta(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form TaO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra, corners with four equivalent Cr(1)O6 octahedra,  an edgeedge with one Ta(1)O6 octahedra, and  an edgeedge with one Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-55°. Both Ta(1)-O(1) bond lengths are 1.97 Å. Both Ta(1)-O(2) bond lengths are 2.03 Å. There is one shorter (2.02 Å) and one longer (2.03 Å) Ta(1)-O(3) bond length. Cr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CrO6 octahedra that share corners with eight equivalent Ta(1)O6 octahedra and edges with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-55°. Both Cr(1)-O(1) bond lengths are 2.33 Å. Both Cr(1)-O(2) bond lengths are 2.14 Å. Both Cr(1)-O(3) bond lengths are 2.11 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Ta(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Ta(1) and one Cr(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Cr(1) atom.