K2YF5 crystallizes in the orthorhombic Pnma space group. K(1) is bonded in a 8-coordinate geometry to two equivalent F(1), two equivalent F(2), two equivalent F(3), and two equivalent F(4) atoms. Y(1) is bonded to one F(2), one F(3), one F(4), and four equivalent F(1) atoms to form distorted edge-sharing YF7 pentagonal bipyramids. There are four inequivalent F sites. In the first F site, F(1) is bonded in a 4-coordinate geometry to two equivalent K(1) and two equivalent Y(1) atoms. In the second F site, F(2) is bonded in a 5-coordinate geometry to four equivalent K(1) and one Y(1) atom. In the third F site, F(3) is bonded to four equivalent K(1) and one Y(1) atom to form a mixture of distorted corner, edge, and face-sharing FK4Y trigonal bipyramids. In the fourth F site, F(4) is bonded to four equivalent K(1) and one Y(1) atom to form a mixture of distorted corner, edge, and face-sharing FK4Y trigonal bipyramids.
K2YF5 crystallizes in the orthorhombic Pnma space group. K(1) is bonded in a 8-coordinate geometry to two equivalent F(1), two equivalent F(2), two equivalent F(3), and two equivalent F(4) atoms. There is one shorter (2.73 Å) and one longer (2.81 Å) K(1)-F(1) bond length. There is one shorter (2.74 Å) and one longer (2.82 Å) K(1)-F(2) bond length. There is one shorter (2.62 Å) and one longer (2.72 Å) K(1)-F(3) bond length. There is one shorter (2.64 Å) and one longer (2.71 Å) K(1)-F(4) bond length. Y(1) is bonded to one F(2), one F(3), one F(4), and four equivalent F(1) atoms to form distorted edge-sharing YF7 pentagonal bipyramids. The Y(1)-F(2) bond length is 2.19 Å. The Y(1)-F(3) bond length is 2.19 Å. The Y(1)-F(4) bond length is 2.20 Å. There are two shorter (2.26 Å) and two longer (2.28 Å) Y(1)-F(1) bond lengths. There are four inequivalent F sites. In the first F site, F(1) is bonded in a 4-coordinate geometry to two equivalent K(1) and two equivalent Y(1) atoms. In the second F site, F(2) is bonded in a 5-coordinate geometry to four equivalent K(1) and one Y(1) atom. In the third F site, F(3) is bonded to four equivalent K(1) and one Y(1) atom to form a mixture of distorted corner, edge, and face-sharing FK4Y trigonal bipyramids. In the fourth F site, F(4) is bonded to four equivalent K(1) and one Y(1) atom to form a mixture of distorted corner, edge, and face-sharing FK4Y trigonal bipyramids.