K2Be2Zn(O3F4)2 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one F(1), one F(3), two equivalent F(2), and two equivalent F(4) atoms. Be(1) is bonded in a tetrahedral geometry to one F(1), one F(2), one F(3), and one F(4) atom. Zn(1) is bonded in a distorted octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1) and one Zn(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1) and one Zn(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Zn(1) atom. There are four inequivalent F sites. In the first F site, F(4) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Be(1) atom. In the second F site, F(1) is bonded in a distorted single-bond geometry to one K(1) and one Be(1) atom. In the third F site, F(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Be(1) atom. In the fourth F site, F(3) is bonded in a distorted single-bond geometry to one K(1) and one Be(1) atom.
K2Be2Zn(O3F4)2 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one F(1), one F(3), two equivalent F(2), and two equivalent F(4) atoms. The K(1)-O(1) bond length is 2.90 Å. The K(1)-O(2) bond length is 3.08 Å. The K(1)-F(1) bond length is 2.63 Å. The K(1)-F(3) bond length is 2.67 Å. There is one shorter (2.70 Å) and one longer (2.92 Å) K(1)-F(2) bond length. There is one shorter (2.70 Å) and one longer (2.79 Å) K(1)-F(4) bond length. Be(1) is bonded in a tetrahedral geometry to one F(1), one F(2), one F(3), and one F(4) atom. The Be(1)-F(1) bond length is 1.57 Å. The Be(1)-F(2) bond length is 1.53 Å. The Be(1)-F(3) bond length is 1.61 Å. The Be(1)-F(4) bond length is 1.56 Å. Zn(1) is bonded in a distorted octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Zn(1)-O(1) bond lengths are 1.92 Å. Both Zn(1)-O(2) bond lengths are 1.98 Å. Both Zn(1)-O(3) bond lengths are 2.19 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1) and one Zn(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1) and one Zn(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Zn(1) atom. There are four inequivalent F sites. In the first F site, F(4) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Be(1) atom. In the second F site, F(1) is bonded in a distorted single-bond geometry to one K(1) and one Be(1) atom. In the third F site, F(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Be(1) atom. In the fourth F site, F(3) is bonded in a distorted single-bond geometry to one K(1) and one Be(1) atom.