K(IrO2)4 crystallizes in the monoclinic C2/m space group. K(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded to one O(2), two equivalent O(3), and three equivalent O(1) atoms to form a mixture of edge and corner-sharing IrO6 octahedra. The corner-sharing octahedral tilt angles are 53°. In the second Ir site, Ir(2) is bonded to one O(3), two equivalent O(2), and three equivalent O(4) atoms to form a mixture of edge and corner-sharing IrO6 octahedra. The corner-sharing octahedral tilt angles are 53°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one K(1) and three equivalent Ir(1) atoms to form a mixture of edge and corner-sharing OKIr3 tetrahedra. In the second O site, O(2) is bonded in a trigonal planar geometry to one Ir(1) and two equivalent Ir(2) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ir(2) and two equivalent Ir(1) atoms. In the fourth O site, O(4) is bonded to one K(1) and three equivalent Ir(2) atoms to form a mixture of edge and corner-sharing OKIr3 tetrahedra.
K(IrO2)4 crystallizes in the monoclinic C2/m space group. K(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. Both K(1)-O(1) bond lengths are 2.65 Å. Both K(1)-O(4) bond lengths are 2.64 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded to one O(2), two equivalent O(3), and three equivalent O(1) atoms to form a mixture of edge and corner-sharing IrO6 octahedra. The corner-sharing octahedral tilt angles are 53°. The Ir(1)-O(2) bond length is 1.97 Å. Both Ir(1)-O(3) bond lengths are 2.03 Å. There is one shorter (2.05 Å) and two longer (2.08 Å) Ir(1)-O(1) bond lengths. In the second Ir site, Ir(2) is bonded to one O(3), two equivalent O(2), and three equivalent O(4) atoms to form a mixture of edge and corner-sharing IrO6 octahedra. The corner-sharing octahedral tilt angles are 53°. The Ir(2)-O(3) bond length is 1.99 Å. Both Ir(2)-O(2) bond lengths are 2.01 Å. There is one shorter (2.06 Å) and two longer (2.07 Å) Ir(2)-O(4) bond lengths. There are four inequivalent O sites. In the first O site, O(1) is bonded to one K(1) and three equivalent Ir(1) atoms to form a mixture of edge and corner-sharing OKIr3 tetrahedra. In the second O site, O(2) is bonded in a trigonal planar geometry to one Ir(1) and two equivalent Ir(2) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ir(2) and two equivalent Ir(1) atoms. In the fourth O site, O(4) is bonded to one K(1) and three equivalent Ir(2) atoms to form a mixture of edge and corner-sharing OKIr3 tetrahedra.