KTm2F7 crystallizes in the monoclinic C2/m space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one F(3), one F(4), one F(5), one F(8), two equivalent F(9), and four equivalent F(2) atoms. In the second K site, K(2) is bonded in a 5-coordinate geometry to one F(10), one F(4), one F(5), two equivalent F(1), and two equivalent F(9) atoms. There are three inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a body-centered cubic geometry to two equivalent F(1), two equivalent F(2), two equivalent F(5), and two equivalent F(8) atoms. In the second Tm site, Tm(2) is bonded in a 8-coordinate geometry to one F(10), one F(8), two equivalent F(1), two equivalent F(6), and two equivalent F(9) atoms. In the third Tm site, Tm(3) is bonded in a 8-coordinate geometry to one F(1), one F(10), one F(2), one F(3), one F(4), one F(6), one F(7), and one F(9) atom. There are ten inequivalent F sites. In the first F site, F(7) is bonded in a distorted bent 150 degrees geometry to two equivalent Tm(3) atoms. In the second F site, F(8) is bonded to one K(1), one Tm(2), and two equivalent Tm(1) atoms to form distorted FKTm3 tetrahedra that share  a cornercorner with one F(4)K2Tm2 tetrahedra,  a cornercorner with one F(10)KTm3 tetrahedra, corners with two equivalent F(1)KTm3 tetrahedra, corners with four equivalent F(2)K2Tm2 tetrahedra, corners with five equivalent F(5)K2Tm2 tetrahedra,  an edgeedge with one F(8)KTm3 tetrahedra, edges with two equivalent F(2)K2Tm2 tetrahedra, and edges with two equivalent F(1)KTm3 tetrahedra. In the third F site, F(9) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Tm(2), and one Tm(3) atom. In the fourth F site, F(10) is bonded to one K(2), one Tm(2), and two equivalent Tm(3) atoms to form FKTm3 tetrahedra that share  a cornercorner with one F(4)K2Tm2 tetrahedra,  a cornercorner with one F(5)K2Tm2 tetrahedra,  a cornercorner with one F(8)KTm3 tetrahedra, corners with two equivalent F(2)K2Tm2 tetrahedra, corners with two equivalent F(1)KTm3 tetrahedra,  an edgeedge with one F(4)K2Tm2 tetrahedra, and edges with two equivalent F(1)KTm3 tetrahedra. In the fifth F site, F(1) is bonded to one K(2), one Tm(1), one Tm(2), and one Tm(3) atom to form FKTm3 tetrahedra that share  a cornercorner with one F(2)K2Tm2 tetrahedra,  a cornercorner with one F(5)K2Tm2 tetrahedra,  a cornercorner with one F(10)KTm3 tetrahedra,  a cornercorner with one F(8)KTm3 tetrahedra, corners with two equivalent F(4)K2Tm2 tetrahedra, corners with three equivalent F(1)KTm3 tetrahedra,  an edgeedge with one F(2)K2Tm2 tetrahedra,  an edgeedge with one F(5)K2Tm2 tetrahedra,  an edgeedge with one F(10)KTm3 tetrahedra, and  an edgeedge with one F(8)KTm3 tetrahedra. In the sixth F site, F(2) is bonded to two equivalent K(1), one Tm(1), and one Tm(3) atom to form distorted FK2Tm2 tetrahedra that share  a cornercorner with one F(4)K2Tm2 tetrahedra,  a cornercorner with one F(1)KTm3 tetrahedra,  a cornercorner with one F(10)KTm3 tetrahedra, corners with two equivalent F(5)K2Tm2 tetrahedra, corners with two equivalent F(8)KTm3 tetrahedra, corners with five equivalent F(2)K2Tm2 tetrahedra,  an edgeedge with one F(2)K2Tm2 tetrahedra,  an edgeedge with one F(4)K2Tm2 tetrahedra,  an edgeedge with one F(5)K2Tm2 tetrahedra,  an edgeedge with one F(1)KTm3 tetrahedra, and  an edgeedge with one F(8)KTm3 tetrahedra. In the seventh F site, F(3) is bonded in a distorted bent 150 degrees geometry to one K(1) and two equivalent Tm(3) atoms. In the eighth F site, F(4) is bonded to one K(1), one K(2), and two equivalent Tm(3) atoms to form FK2Tm2 tetrahedra that share  a cornercorner with one F(10)KTm3 tetrahedra,  a cornercorner with one F(8)KTm3 tetrahedra, corners with two equivalent F(2)K2Tm2 tetrahedra, corners with four equivalent F(1)KTm3 tetrahedra,  an edgeedge with one F(5)K2Tm2 tetrahedra,  an edgeedge with one F(10)KTm3 tetrahedra, and edges with two equivalent F(2)K2Tm2 tetrahedra. In the ninth F site, F(5) is bonded to one K(1), one K(2), and two equivalent Tm(1) atoms to form FK2Tm2 tetrahedra that share  a cornercorner with one F(10)KTm3 tetrahedra, corners with two equivalent F(1)KTm3 tetrahedra, corners with four equivalent F(2)K2Tm2 tetrahedra, corners with five equivalent F(8)KTm3 tetrahedra,  an edgeedge with one F(4)K2Tm2 tetrahedra,  an edgeedge with one F(5)K2Tm2 tetrahedra, edges with two equivalent F(2)K2Tm2 tetrahedra, and edges with two equivalent F(1)KTm3 tetrahedra. In the tenth F site, F(6) is bonded in a distorted bent 150 degrees geometry to one Tm(2) and one Tm(3) atom.
KTm2F7 crystallizes in the monoclinic C2/m space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one F(3), one F(4), one F(5), one F(8), two equivalent F(9), and four equivalent F(2) atoms. The K(1)-F(3) bond length is 2.87 Å. The K(1)-F(4) bond length is 2.63 Å. The K(1)-F(5) bond length is 2.66 Å. The K(1)-F(8) bond length is 2.74 Å. Both K(1)-F(9) bond lengths are 2.76 Å. There are two shorter (2.62 Å) and two longer (2.64 Å) K(1)-F(2) bond lengths. In the second K site, K(2) is bonded in a 5-coordinate geometry to one F(10), one F(4), one F(5), two equivalent F(1), and two equivalent F(9) atoms. The K(2)-F(10) bond length is 2.60 Å. The K(2)-F(4) bond length is 2.65 Å. The K(2)-F(5) bond length is 2.66 Å. Both K(2)-F(1) bond lengths are 2.68 Å. Both K(2)-F(9) bond lengths are 3.07 Å. There are three inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a body-centered cubic geometry to two equivalent F(1), two equivalent F(2), two equivalent F(5), and two equivalent F(8) atoms. Both Tm(1)-F(1) bond lengths are 2.28 Å. Both Tm(1)-F(2) bond lengths are 2.16 Å. Both Tm(1)-F(5) bond lengths are 2.24 Å. Both Tm(1)-F(8) bond lengths are 2.38 Å. In the second Tm site, Tm(2) is bonded in a 8-coordinate geometry to one F(10), one F(8), two equivalent F(1), two equivalent F(6), and two equivalent F(9) atoms. The Tm(2)-F(10) bond length is 2.27 Å. The Tm(2)-F(8) bond length is 2.26 Å. Both Tm(2)-F(1) bond lengths are 2.34 Å. Both Tm(2)-F(6) bond lengths are 2.16 Å. Both Tm(2)-F(9) bond lengths are 2.18 Å. In the third Tm site, Tm(3) is bonded in a 8-coordinate geometry to one F(1), one F(10), one F(2), one F(3), one F(4), one F(6), one F(7), and one F(9) atom. The Tm(3)-F(1) bond length is 2.36 Å. The Tm(3)-F(10) bond length is 2.29 Å. The Tm(3)-F(2) bond length is 2.25 Å. The Tm(3)-F(3) bond length is 2.15 Å. The Tm(3)-F(4) bond length is 2.20 Å. The Tm(3)-F(6) bond length is 2.19 Å. The Tm(3)-F(7) bond length is 2.16 Å. The Tm(3)-F(9) bond length is 2.22 Å. There are ten inequivalent F sites. In the first F site, F(7) is bonded in a distorted bent 150 degrees geometry to two equivalent Tm(3) atoms. In the second F site, F(8) is bonded to one K(1), one Tm(2), and two equivalent Tm(1) atoms to form distorted FKTm3 tetrahedra that share  a cornercorner with one F(4)K2Tm2 tetrahedra,  a cornercorner with one F(10)KTm3 tetrahedra, corners with two equivalent F(1)KTm3 tetrahedra, corners with four equivalent F(2)K2Tm2 tetrahedra, corners with five equivalent F(5)K2Tm2 tetrahedra,  an edgeedge with one F(8)KTm3 tetrahedra, edges with two equivalent F(2)K2Tm2 tetrahedra, and edges with two equivalent F(1)KTm3 tetrahedra. In the third F site, F(9) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Tm(2), and one Tm(3) atom. In the fourth F site, F(10) is bonded to one K(2), one Tm(2), and two equivalent Tm(3) atoms to form FKTm3 tetrahedra that share  a cornercorner with one F(4)K2Tm2 tetrahedra,  a cornercorner with one F(5)K2Tm2 tetrahedra,  a cornercorner with one F(8)KTm3 tetrahedra, corners with two equivalent F(2)K2Tm2 tetrahedra, corners with two equivalent F(1)KTm3 tetrahedra,  an edgeedge with one F(4)K2Tm2 tetrahedra, and edges with two equivalent F(1)KTm3 tetrahedra. In the fifth F site, F(1) is bonded to one K(2), one Tm(1), one Tm(2), and one Tm(3) atom to form FKTm3 tetrahedra that share  a cornercorner with one F(2)K2Tm2 tetrahedra,  a cornercorner with one F(5)K2Tm2 tetrahedra,  a cornercorner with one F(10)KTm3 tetrahedra,  a cornercorner with one F(8)KTm3 tetrahedra, corners with two equivalent F(4)K2Tm2 tetrahedra, corners with three equivalent F(1)KTm3 tetrahedra,  an edgeedge with one F(2)K2Tm2 tetrahedra,  an edgeedge with one F(5)K2Tm2 tetrahedra,  an edgeedge with one F(10)KTm3 tetrahedra, and  an edgeedge with one F(8)KTm3 tetrahedra. In the sixth F site, F(2) is bonded to two equivalent K(1), one Tm(1), and one Tm(3) atom to form distorted FK2Tm2 tetrahedra that share  a cornercorner with one F(4)K2Tm2 tetrahedra,  a cornercorner with one F(1)KTm3 tetrahedra,  a cornercorner with one F(10)KTm3 tetrahedra, corners with two equivalent F(5)K2Tm2 tetrahedra, corners with two equivalent F(8)KTm3 tetrahedra, corners with five equivalent F(2)K2Tm2 tetrahedra,  an edgeedge with one F(2)K2Tm2 tetrahedra,  an edgeedge with one F(4)K2Tm2 tetrahedra,  an edgeedge with one F(5)K2Tm2 tetrahedra,  an edgeedge with one F(1)KTm3 tetrahedra, and  an edgeedge with one F(8)KTm3 tetrahedra. In the seventh F site, F(3) is bonded in a distorted bent 150 degrees geometry to one K(1) and two equivalent Tm(3) atoms. In the eighth F site, F(4) is bonded to one K(1), one K(2), and two equivalent Tm(3) atoms to form FK2Tm2 tetrahedra that share  a cornercorner with one F(10)KTm3 tetrahedra,  a cornercorner with one F(8)KTm3 tetrahedra, corners with two equivalent F(2)K2Tm2 tetrahedra, corners with four equivalent F(1)KTm3 tetrahedra,  an edgeedge with one F(5)K2Tm2 tetrahedra,  an edgeedge with one F(10)KTm3 tetrahedra, and edges with two equivalent F(2)K2Tm2 tetrahedra. In the ninth F site, F(5) is bonded to one K(1), one K(2), and two equivalent Tm(1) atoms to form FK2Tm2 tetrahedra that share  a cornercorner with one F(10)KTm3 tetrahedra, corners with two equivalent F(1)KTm3 tetrahedra, corners with four equivalent F(2)K2Tm2 tetrahedra, corners with five equivalent F(8)KTm3 tetrahedra,  an edgeedge with one F(4)K2Tm2 tetrahedra,  an edgeedge with one F(5)K2Tm2 tetrahedra, edges with two equivalent F(2)K2Tm2 tetrahedra, and edges with two equivalent F(1)KTm3 tetrahedra. In the tenth F site, F(6) is bonded in a distorted bent 150 degrees geometry to one Tm(2) and one Tm(3) atom.