K(Mo2O3)4 crystallizes in the monoclinic P2 space group. K(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. There are four inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(2), one O(3), and two equivalent O(6) atoms to form MoO4 tetrahedra that share corners with two equivalent Mo(3)O5 square pyramids, corners with four equivalent Mo(4)O5 square pyramids, and corners with two equivalent Mo(1)O4 tetrahedra. In the second Mo site, Mo(2) is bonded to one O(1), one O(4), and two equivalent O(5) atoms to form MoO4 tetrahedra that share corners with two equivalent Mo(4)O5 square pyramids, corners with four equivalent Mo(3)O5 square pyramids, and corners with two equivalent Mo(2)O4 tetrahedra. In the third Mo site, Mo(3) is bonded to one O(6), two equivalent O(1), and two equivalent O(4) atoms to form MoO5 square pyramids that share corners with two equivalent Mo(1)O4 tetrahedra, corners with four equivalent Mo(2)O4 tetrahedra, and edges with two equivalent Mo(3)O5 square pyramids. In the fourth Mo site, Mo(4) is bonded to one O(5), two equivalent O(2), and two equivalent O(3) atoms to form MoO5 square pyramids that share corners with two equivalent Mo(2)O4 tetrahedra, corners with four equivalent Mo(1)O4 tetrahedra, and edges with two equivalent Mo(4)O5 square pyramids. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Mo(2) and two equivalent Mo(3) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(1), one Mo(1), and two equivalent Mo(4) atoms. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Mo(1) and two equivalent Mo(4) atoms. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one K(1), one Mo(2), and two equivalent Mo(3) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one K(1), one Mo(4), and two equivalent Mo(2) atoms. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Mo(3) and two equivalent Mo(1) atoms.
K(Mo2O3)4 crystallizes in the monoclinic P2 space group. K(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. Both K(1)-O(2) bond lengths are 3.09 Å. Both K(1)-O(4) bond lengths are 3.14 Å. Both K(1)-O(5) bond lengths are 3.20 Å. There are four inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(2), one O(3), and two equivalent O(6) atoms to form MoO4 tetrahedra that share corners with two equivalent Mo(3)O5 square pyramids, corners with four equivalent Mo(4)O5 square pyramids, and corners with two equivalent Mo(1)O4 tetrahedra. The Mo(1)-O(2) bond length is 2.00 Å. The Mo(1)-O(3) bond length is 1.96 Å. There is one shorter (2.04 Å) and one longer (2.05 Å) Mo(1)-O(6) bond length. In the second Mo site, Mo(2) is bonded to one O(1), one O(4), and two equivalent O(5) atoms to form MoO4 tetrahedra that share corners with two equivalent Mo(4)O5 square pyramids, corners with four equivalent Mo(3)O5 square pyramids, and corners with two equivalent Mo(2)O4 tetrahedra. The Mo(2)-O(1) bond length is 1.94 Å. The Mo(2)-O(4) bond length is 2.00 Å. Both Mo(2)-O(5) bond lengths are 2.06 Å. In the third Mo site, Mo(3) is bonded to one O(6), two equivalent O(1), and two equivalent O(4) atoms to form MoO5 square pyramids that share corners with two equivalent Mo(1)O4 tetrahedra, corners with four equivalent Mo(2)O4 tetrahedra, and edges with two equivalent Mo(3)O5 square pyramids. The Mo(3)-O(6) bond length is 2.14 Å. Both Mo(3)-O(1) bond lengths are 2.13 Å. Both Mo(3)-O(4) bond lengths are 2.17 Å. In the fourth Mo site, Mo(4) is bonded to one O(5), two equivalent O(2), and two equivalent O(3) atoms to form MoO5 square pyramids that share corners with two equivalent Mo(2)O4 tetrahedra, corners with four equivalent Mo(1)O4 tetrahedra, and edges with two equivalent Mo(4)O5 square pyramids. The Mo(4)-O(5) bond length is 2.15 Å. Both Mo(4)-O(2) bond lengths are 2.17 Å. Both Mo(4)-O(3) bond lengths are 2.13 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Mo(2) and two equivalent Mo(3) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(1), one Mo(1), and two equivalent Mo(4) atoms. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Mo(1) and two equivalent Mo(4) atoms. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one K(1), one Mo(2), and two equivalent Mo(3) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one K(1), one Mo(4), and two equivalent Mo(2) atoms. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Mo(3) and two equivalent Mo(1) atoms.