HfMo2O8 crystallizes in the monoclinic C2/c space group. Hf(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(4) atoms. Mo(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Hf(1) and one Mo(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Hf(1) and two equivalent Mo(1) atoms. In the third O site, O(3) is bonded in a single-bond geometry to one Mo(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Hf(1) and one Mo(1) atom.
HfMo2O8 crystallizes in the monoclinic C2/c space group. Hf(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(4) atoms. Both Hf(1)-O(1) bond lengths are 2.11 Å. Both Hf(1)-O(2) bond lengths are 2.14 Å. There are two shorter (2.24 Å) and two longer (2.33 Å) Hf(1)-O(4) bond lengths. Mo(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), and two equivalent O(2) atoms. The Mo(1)-O(1) bond length is 1.81 Å. The Mo(1)-O(3) bond length is 1.71 Å. The Mo(1)-O(4) bond length is 1.90 Å. There is one shorter (2.03 Å) and one longer (2.06 Å) Mo(1)-O(2) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Hf(1) and one Mo(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Hf(1) and two equivalent Mo(1) atoms. In the third O site, O(3) is bonded in a single-bond geometry to one Mo(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Hf(1) and one Mo(1) atom.