KHf4BiO12 crystallizes in the orthorhombic Amm2 space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms. Hf(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form corner-sharing HfO6 octahedra. The corner-sharing octahedral tilt angles range from 8-49°. Bi(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one K(1) and two equivalent Hf(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Hf(1) and one Bi(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), two equivalent Hf(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to two equivalent K(1) and two equivalent Hf(1) atoms. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to two equivalent Hf(1) and one Bi(1) atom.
KHf4BiO12 crystallizes in the orthorhombic Amm2 space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms. Both K(1)-O(3) bond lengths are 3.12 Å. All K(1)-O(1) bond lengths are 2.59 Å. There are two shorter (2.86 Å) and two longer (2.87 Å) K(1)-O(4) bond lengths. Hf(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form corner-sharing HfO6 octahedra. The corner-sharing octahedral tilt angles range from 8-49°. The Hf(1)-O(2) bond length is 2.16 Å. The Hf(1)-O(3) bond length is 2.16 Å. The Hf(1)-O(4) bond length is 2.03 Å. The Hf(1)-O(5) bond length is 2.17 Å. There is one shorter (2.03 Å) and one longer (2.05 Å) Hf(1)-O(1) bond length. Bi(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. Both Bi(1)-O(2) bond lengths are 2.26 Å. Both Bi(1)-O(3) bond lengths are 2.28 Å. Both Bi(1)-O(5) bond lengths are 2.16 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one K(1) and two equivalent Hf(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Hf(1) and one Bi(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), two equivalent Hf(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to two equivalent K(1) and two equivalent Hf(1) atoms. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to two equivalent Hf(1) and one Bi(1) atom.