TaMnNO2 is Ilmenite-derived structured and crystallizes in the monoclinic Cc space group. Ta(1) is bonded to two equivalent N(1), two equivalent O(1), and two equivalent O(2) atoms to form distorted TaN2O4 octahedra that share corners with three equivalent Mn(1)N2O4 octahedra, corners with six equivalent Ta(1)N2O4 octahedra, edges with three equivalent Mn(1)N2O4 octahedra, and  a faceface with one Mn(1)N2O4 octahedra. The corner-sharing octahedral tilt angles range from 42-63°. Mn(1) is bonded to two equivalent N(1), two equivalent O(1), and two equivalent O(2) atoms to form distorted MnN2O4 octahedra that share corners with three equivalent Ta(1)N2O4 octahedra, corners with six equivalent Mn(1)N2O4 octahedra, edges with three equivalent Ta(1)N2O4 octahedra, and  a faceface with one Ta(1)N2O4 octahedra. The corner-sharing octahedral tilt angles range from 53-63°. N(1) is bonded in a distorted see-saw-like geometry to two equivalent Ta(1) and two equivalent Mn(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Ta(1) and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to two equivalent Ta(1) and two equivalent Mn(1) atoms.
TaMnNO2 is Ilmenite-derived structured and crystallizes in the monoclinic Cc space group. Ta(1) is bonded to two equivalent N(1), two equivalent O(1), and two equivalent O(2) atoms to form distorted TaN2O4 octahedra that share corners with three equivalent Mn(1)N2O4 octahedra, corners with six equivalent Ta(1)N2O4 octahedra, edges with three equivalent Mn(1)N2O4 octahedra, and  a faceface with one Mn(1)N2O4 octahedra. The corner-sharing octahedral tilt angles range from 42-63°. There is one shorter (1.95 Å) and one longer (2.19 Å) Ta(1)-N(1) bond length. There is one shorter (1.95 Å) and one longer (2.19 Å) Ta(1)-O(1) bond length. There is one shorter (1.96 Å) and one longer (2.19 Å) Ta(1)-O(2) bond length. Mn(1) is bonded to two equivalent N(1), two equivalent O(1), and two equivalent O(2) atoms to form distorted MnN2O4 octahedra that share corners with three equivalent Ta(1)N2O4 octahedra, corners with six equivalent Mn(1)N2O4 octahedra, edges with three equivalent Ta(1)N2O4 octahedra, and  a faceface with one Ta(1)N2O4 octahedra. The corner-sharing octahedral tilt angles range from 53-63°. There is one shorter (2.08 Å) and one longer (2.09 Å) Mn(1)-N(1) bond length. There is one shorter (2.15 Å) and one longer (2.36 Å) Mn(1)-O(1) bond length. There is one shorter (2.13 Å) and one longer (2.20 Å) Mn(1)-O(2) bond length. N(1) is bonded in a distorted see-saw-like geometry to two equivalent Ta(1) and two equivalent Mn(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Ta(1) and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to two equivalent Ta(1) and two equivalent Mn(1) atoms.