K2TbO3 is Krennerite-derived structured and crystallizes in the orthorhombic Cmc2_1 space group. K(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. Tb(1) is bonded to one O(2) and four equivalent O(1) atoms to form distorted edge-sharing TbO5 trigonal bipyramids. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent K(1) and two equivalent Tb(1) atoms to form a mixture of distorted face, corner, and edge-sharing OK4Tb2 octahedra. The corner-sharing octahedral tilt angles range from 39-49°. In the second O site, O(2) is bonded in a 5-coordinate geometry to four equivalent K(1) and one Tb(1) atom.
K2TbO3 is Krennerite-derived structured and crystallizes in the orthorhombic Cmc2_1 space group. K(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. There is one shorter (2.66 Å) and one longer (2.95 Å) K(1)-O(2) bond length. There are a spread of K(1)-O(1) bond distances ranging from 2.76-3.08 Å. Tb(1) is bonded to one O(2) and four equivalent O(1) atoms to form distorted edge-sharing TbO5 trigonal bipyramids. The Tb(1)-O(2) bond length is 2.14 Å. There are two shorter (2.24 Å) and two longer (2.27 Å) Tb(1)-O(1) bond lengths. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent K(1) and two equivalent Tb(1) atoms to form a mixture of distorted face, corner, and edge-sharing OK4Tb2 octahedra. The corner-sharing octahedral tilt angles range from 39-49°. In the second O site, O(2) is bonded in a 5-coordinate geometry to four equivalent K(1) and one Tb(1) atom.