KZn4B3O9 crystallizes in the monoclinic P2/c space group. K(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form corner-sharing ZnO4 tetrahedra. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form corner-sharing ZnO4 tetrahedra. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(5) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(4) and two equivalent O(3) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Zn(1), one Zn(2), and one B(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(1), one Zn(2), and one B(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one B(2) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Zn(1) and one B(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one B(1) atom.
KZn4B3O9 crystallizes in the monoclinic P2/c space group. K(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. Both K(1)-O(1) bond lengths are 2.90 Å. Both K(1)-O(2) bond lengths are 2.82 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form corner-sharing ZnO4 tetrahedra. The Zn(1)-O(1) bond length is 1.97 Å. The Zn(1)-O(3) bond length is 1.99 Å. The Zn(1)-O(4) bond length is 1.99 Å. The Zn(1)-O(5) bond length is 1.97 Å. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form corner-sharing ZnO4 tetrahedra. The Zn(2)-O(1) bond length is 2.03 Å. The Zn(2)-O(2) bond length is 1.93 Å. The Zn(2)-O(3) bond length is 2.01 Å. The Zn(2)-O(5) bond length is 1.95 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(5) atom. The B(1)-O(1) bond length is 1.42 Å. The B(1)-O(2) bond length is 1.35 Å. The B(1)-O(5) bond length is 1.40 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(4) and two equivalent O(3) atoms. The B(2)-O(4) bond length is 1.39 Å. Both B(2)-O(3) bond lengths are 1.38 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Zn(1), one Zn(2), and one B(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(1), one Zn(2), and one B(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one B(2) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Zn(1) and one B(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one B(1) atom.