K3Gd(BO3)2 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one O(4), one O(5), and four equivalent O(1) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to one O(3), one O(4), one O(5), two equivalent O(2), and three equivalent O(1) atoms. Gd(1) is bonded to one O(2), one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form corner-sharing GdO7 pentagonal bipyramids. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(5) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(1) atoms. There are five inequivalent O sites. In the first O site, O(2) is bonded in a 1-coordinate geometry to four equivalent K(2), one Gd(1), and one B(2) atom. In the second O site, O(3) is bonded to two equivalent K(2), two equivalent Gd(1), and one B(1) atom to form distorted corner-sharing OK2Gd2B trigonal bipyramids. In the third O site, O(4) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), one Gd(1), and one B(1) atom. In the fourth O site, O(5) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), one Gd(1), and one B(1) atom. In the fifth O site, O(1) is bonded in a 1-coordinate geometry to two equivalent K(1), three equivalent K(2), one Gd(1), and one B(2) atom.
K3Gd(BO3)2 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one O(4), one O(5), and four equivalent O(1) atoms. The K(1)-O(4) bond length is 2.73 Å. The K(1)-O(5) bond length is 2.78 Å. There are two shorter (3.08 Å) and two longer (3.10 Å) K(1)-O(1) bond lengths. In the second K site, K(2) is bonded in a 8-coordinate geometry to one O(3), one O(4), one O(5), two equivalent O(2), and three equivalent O(1) atoms. The K(2)-O(3) bond length is 2.65 Å. The K(2)-O(4) bond length is 2.61 Å. The K(2)-O(5) bond length is 2.65 Å. There is one shorter (2.75 Å) and one longer (2.79 Å) K(2)-O(2) bond length. There is one shorter (3.09 Å) and two longer (3.13 Å) K(2)-O(1) bond lengths. Gd(1) is bonded to one O(2), one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form corner-sharing GdO7 pentagonal bipyramids. The Gd(1)-O(2) bond length is 2.35 Å. The Gd(1)-O(4) bond length is 2.46 Å. The Gd(1)-O(5) bond length is 2.44 Å. Both Gd(1)-O(1) bond lengths are 2.35 Å. There is one shorter (2.44 Å) and one longer (2.45 Å) Gd(1)-O(3) bond length. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(5) atom. The B(1)-O(3) bond length is 1.41 Å. The B(1)-O(4) bond length is 1.38 Å. The B(1)-O(5) bond length is 1.38 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(1) atoms. The B(2)-O(2) bond length is 1.40 Å. Both B(2)-O(1) bond lengths are 1.40 Å. There are five inequivalent O sites. In the first O site, O(2) is bonded in a 1-coordinate geometry to four equivalent K(2), one Gd(1), and one B(2) atom. In the second O site, O(3) is bonded to two equivalent K(2), two equivalent Gd(1), and one B(1) atom to form distorted corner-sharing OK2Gd2B trigonal bipyramids. In the third O site, O(4) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), one Gd(1), and one B(1) atom. In the fourth O site, O(5) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), one Gd(1), and one B(1) atom. In the fifth O site, O(1) is bonded in a 1-coordinate geometry to two equivalent K(1), three equivalent K(2), one Gd(1), and one B(2) atom.