(NH4)2KWO3F3 crystallizes in the monoclinic Pc space group. K(1) is bonded to one O(1), one O(2), one O(3), one F(1), one F(2), and one F(3) atom to form distorted KO3F3 octahedra that share corners with six equivalent W(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 20-29°. W(1) is bonded to one O(1), one O(2), one O(3), one F(1), one F(2), and one F(3) atom to form WO3F3 octahedra that share corners with six equivalent K(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 20-29°. There are two inequivalent N sites. In the first N site, N(1) is bonded in a tetrahedral geometry to one H(1), one H(3), one H(5), and one H(7) atom. In the second N site, N(2) is bonded in a tetrahedral geometry to one H(2), one H(4), one H(6), and one H(8) atom. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a distorted linear geometry to one N(1) and one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(2) and one O(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one N(1) and one O(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(2) and one F(3) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one N(1) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one N(2) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one N(1) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one N(2) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one K(1), one W(1), and one H(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(1), one W(1), and one H(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one W(1), and one H(3) atom. There are three inequivalent F sites. In the first F site, F(2) is bonded in a bent 150 degrees geometry to one K(1) and one W(1) atom. In the second F site, F(3) is bonded in a 3-coordinate geometry to one K(1), one W(1), and one H(4) atom. In the third F site, F(1) is bonded in a bent 150 degrees geometry to one K(1) and one W(1) atom.
(NH4)2KWO3F3 crystallizes in the monoclinic Pc space group. K(1) is bonded to one O(1), one O(2), one O(3), one F(1), one F(2), and one F(3) atom to form distorted KO3F3 octahedra that share corners with six equivalent W(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 20-29°. The K(1)-O(1) bond length is 2.92 Å. The K(1)-O(2) bond length is 2.94 Å. The K(1)-O(3) bond length is 2.68 Å. The K(1)-F(1) bond length is 2.61 Å. The K(1)-F(2) bond length is 2.66 Å. The K(1)-F(3) bond length is 2.62 Å. W(1) is bonded to one O(1), one O(2), one O(3), one F(1), one F(2), and one F(3) atom to form WO3F3 octahedra that share corners with six equivalent K(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 20-29°. The W(1)-O(1) bond length is 1.88 Å. The W(1)-O(2) bond length is 1.87 Å. The W(1)-O(3) bond length is 1.80 Å. The W(1)-F(1) bond length is 2.00 Å. The W(1)-F(2) bond length is 2.00 Å. The W(1)-F(3) bond length is 2.17 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a tetrahedral geometry to one H(1), one H(3), one H(5), and one H(7) atom. The N(1)-H(1) bond length is 1.08 Å. The N(1)-H(3) bond length is 1.05 Å. The N(1)-H(5) bond length is 1.03 Å. The N(1)-H(7) bond length is 1.04 Å. In the second N site, N(2) is bonded in a tetrahedral geometry to one H(2), one H(4), one H(6), and one H(8) atom. The N(2)-H(2) bond length is 1.07 Å. The N(2)-H(4) bond length is 1.05 Å. The N(2)-H(6) bond length is 1.04 Å. The N(2)-H(8) bond length is 1.03 Å. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a distorted linear geometry to one N(1) and one O(1) atom. The H(1)-O(1) bond length is 1.62 Å. In the second H site, H(2) is bonded in a single-bond geometry to one N(2) and one O(2) atom. The H(2)-O(2) bond length is 1.74 Å. In the third H site, H(3) is bonded in a single-bond geometry to one N(1) and one O(3) atom. The H(3)-O(3) bond length is 1.76 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(2) and one F(3) atom. The H(4)-F(3) bond length is 1.70 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one N(1) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one N(2) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one N(1) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one N(2) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one K(1), one W(1), and one H(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(1), one W(1), and one H(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one W(1), and one H(3) atom. There are three inequivalent F sites. In the first F site, F(2) is bonded in a bent 150 degrees geometry to one K(1) and one W(1) atom. In the second F site, F(3) is bonded in a 3-coordinate geometry to one K(1), one W(1), and one H(4) atom. In the third F site, F(1) is bonded in a bent 150 degrees geometry to one K(1) and one W(1) atom.