KTb(WO4)2 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and four equivalent O(4) atoms. Tb(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. W(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 45°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Tb(1), and one W(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one Tb(1), and two equivalent W(1) atoms. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(1), two equivalent Tb(1), and one W(1) atom. In the fourth O site, O(4) is bonded to two equivalent K(1) and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing OK2W2 trigonal pyramids.
KTb(WO4)2 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and four equivalent O(4) atoms. Both K(1)-O(1) bond lengths are 2.90 Å. Both K(1)-O(2) bond lengths are 3.00 Å. Both K(1)-O(3) bond lengths are 3.13 Å. There are two shorter (2.80 Å) and two longer (2.85 Å) K(1)-O(4) bond lengths. Tb(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Both Tb(1)-O(1) bond lengths are 2.28 Å. Both Tb(1)-O(2) bond lengths are 2.29 Å. There are two shorter (2.33 Å) and two longer (2.72 Å) Tb(1)-O(3) bond lengths. W(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 45°. The W(1)-O(1) bond length is 1.79 Å. The W(1)-O(3) bond length is 1.83 Å. There is one shorter (1.96 Å) and one longer (2.11 Å) W(1)-O(2) bond length. There is one shorter (1.80 Å) and one longer (2.27 Å) W(1)-O(4) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Tb(1), and one W(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one Tb(1), and two equivalent W(1) atoms. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(1), two equivalent Tb(1), and one W(1) atom. In the fourth O site, O(4) is bonded to two equivalent K(1) and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing OK2W2 trigonal pyramids.