KC9H4O6F crystallizes in the monoclinic Pc space group. K(1) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(6), two equivalent O(1), two equivalent O(4), and two equivalent F(1) atoms. The K(1)-O(2) bond length is 2.88 Å. The K(1)-O(3) bond length is 2.90 Å. The K(1)-O(6) bond length is 2.78 Å. There is one shorter (2.85 Å) and one longer (3.32 Å) K(1)-O(1) bond length. There is one shorter (2.73 Å) and one longer (2.95 Å) K(1)-O(4) bond length. There is one shorter (2.94 Å) and one longer (3.00 Å) K(1)-F(1) bond length. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(7) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-C(6) bond length is 1.40 Å. The C(1)-C(7) bond length is 1.51 Å. In the second C site, C(2) is bonded in a single-bond geometry to one C(1), one C(3), and one F(1) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-F(1) bond length is 1.35 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(8) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-C(8) bond length is 1.50 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one H(3) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-H(3) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(9) atom. The C(5)-C(6) bond length is 1.40 Å. The C(5)-C(9) bond length is 1.49 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one H(4) atom. The C(6)-H(4) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(7)-O(1) bond length is 1.27 Å. The C(7)-O(2) bond length is 1.27 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(3), and one O(4) atom. The C(8)-O(3) bond length is 1.32 Å. The C(8)-O(4) bond length is 1.24 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(5), and one O(6) atom. The C(9)-O(5) bond length is 1.33 Å. The C(9)-O(6) bond length is 1.23 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(2) and one O(3) atom. The H(1)-O(2) bond length is 1.41 Å. The H(1)-O(3) bond length is 1.08 Å. In the second H site, H(2) is bonded in a linear geometry to one O(1) and one O(5) atom. The H(2)-O(1) bond length is 1.53 Å. The H(2)-O(5) bond length is 1.03 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent K(1), one C(7), and one H(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one K(1), one C(7), and one H(1) atom. In the third O site, O(3) is bonded in a distorted water-like geometry to one K(1), one C(8), and one H(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(1) and one C(8) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one C(9) and one H(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one K(1) and one C(9) atom. F(1) is bonded in a single-bond geometry to two equivalent K(1) and one C(2) atom. Linkers: 2 [O]C(=O)c1cc(C(=O)O)cc(C(=O)O)c1F. Metal clusters: 2 [K]. The MOF has largest included sphere 2.41 A, density 1.81 g/cm3, surface area 2240.49 m2/g, accessible volume 0.06 cm3/g