KNa(SbO3)4 crystallizes in the tetragonal P4/mmm space group. K(1) is bonded to four equivalent O(3) and eight equivalent O(1) atoms to form KO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with eight equivalent Na(1)O12 cuboctahedra, and faces with eight equivalent Sb(1)O6 octahedra. Na(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form NaO12 cuboctahedra that share corners with four equivalent Na(1)O12 cuboctahedra, corners with eight equivalent K(1)O12 cuboctahedra, and faces with eight equivalent Sb(1)O6 octahedra. Sb(1) is bonded to one O(2), one O(3), and four equivalent O(1) atoms to form SbO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra, faces with two equivalent K(1)O12 cuboctahedra, and faces with two equivalent Na(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted square co-planar geometry to one K(1), one Na(1), and two equivalent Sb(1) atoms. In the second O site, O(2) is bonded in a distorted square co-planar geometry to two equivalent Na(1) and two equivalent Sb(1) atoms. In the third O site, O(3) is bonded in a distorted square co-planar geometry to two equivalent K(1) and two equivalent Sb(1) atoms.
KNa(SbO3)4 crystallizes in the tetragonal P4/mmm space group. K(1) is bonded to four equivalent O(3) and eight equivalent O(1) atoms to form KO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with eight equivalent Na(1)O12 cuboctahedra, and faces with eight equivalent Sb(1)O6 octahedra. All K(1)-O(3) bond lengths are 2.80 Å. All K(1)-O(1) bond lengths are 2.85 Å. Na(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form NaO12 cuboctahedra that share corners with four equivalent Na(1)O12 cuboctahedra, corners with eight equivalent K(1)O12 cuboctahedra, and faces with eight equivalent Sb(1)O6 octahedra. All Na(1)-O(2) bond lengths are 2.80 Å. All Na(1)-O(1) bond lengths are 2.75 Å. Sb(1) is bonded to one O(2), one O(3), and four equivalent O(1) atoms to form SbO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra, faces with two equivalent K(1)O12 cuboctahedra, and faces with two equivalent Na(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. The Sb(1)-O(2) bond length is 1.98 Å. The Sb(1)-O(3) bond length is 1.99 Å. All Sb(1)-O(1) bond lengths are 1.98 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted square co-planar geometry to one K(1), one Na(1), and two equivalent Sb(1) atoms. In the second O site, O(2) is bonded in a distorted square co-planar geometry to two equivalent Na(1) and two equivalent Sb(1) atoms. In the third O site, O(3) is bonded in a distorted square co-planar geometry to two equivalent K(1) and two equivalent Sb(1) atoms.