K2ReF8 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 11-coordinate geometry to one F(1), two equivalent F(2), two equivalent F(3), two equivalent F(4), and four equivalent F(5) atoms. In the second K site, K(2) is bonded in a 11-coordinate geometry to one F(2), two equivalent F(1), two equivalent F(3), two equivalent F(5), and four equivalent F(4) atoms. Re(1) is bonded in a 8-coordinate geometry to one F(1), one F(2), two equivalent F(3), two equivalent F(4), and two equivalent F(5) atoms. There are five inequivalent F sites. In the first F site, F(5) is bonded to one K(2), two equivalent K(1), and one Re(1) atom to form a mixture of distorted corner and edge-sharing FK3Re tetrahedra. In the second F site, F(1) is bonded in a 4-coordinate geometry to one K(1), two equivalent K(2), and one Re(1) atom. In the third F site, F(2) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one Re(1) atom. In the fourth F site, F(3) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one K(2), and one Re(1) atom. In the fifth F site, F(4) is bonded to one K(1), two equivalent K(2), and one Re(1) atom to form a mixture of distorted corner and edge-sharing FK3Re tetrahedra.
K2ReF8 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 11-coordinate geometry to one F(1), two equivalent F(2), two equivalent F(3), two equivalent F(4), and four equivalent F(5) atoms. The K(1)-F(1) bond length is 2.89 Å. Both K(1)-F(2) bond lengths are 3.01 Å. Both K(1)-F(3) bond lengths are 2.72 Å. Both K(1)-F(4) bond lengths are 2.83 Å. There are two shorter (2.76 Å) and two longer (2.85 Å) K(1)-F(5) bond lengths. In the second K site, K(2) is bonded in a 11-coordinate geometry to one F(2), two equivalent F(1), two equivalent F(3), two equivalent F(5), and four equivalent F(4) atoms. The K(2)-F(2) bond length is 3.06 Å. Both K(2)-F(1) bond lengths are 2.99 Å. Both K(2)-F(3) bond lengths are 2.65 Å. Both K(2)-F(5) bond lengths are 2.68 Å. There are two shorter (2.71 Å) and two longer (2.82 Å) K(2)-F(4) bond lengths. Re(1) is bonded in a 8-coordinate geometry to one F(1), one F(2), two equivalent F(3), two equivalent F(4), and two equivalent F(5) atoms. The Re(1)-F(1) bond length is 1.97 Å. The Re(1)-F(2) bond length is 1.95 Å. Both Re(1)-F(3) bond lengths are 1.93 Å. Both Re(1)-F(4) bond lengths are 1.97 Å. Both Re(1)-F(5) bond lengths are 1.97 Å. There are five inequivalent F sites. In the first F site, F(5) is bonded to one K(2), two equivalent K(1), and one Re(1) atom to form a mixture of distorted corner and edge-sharing FK3Re tetrahedra. In the second F site, F(1) is bonded in a 4-coordinate geometry to one K(1), two equivalent K(2), and one Re(1) atom. In the third F site, F(2) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one Re(1) atom. In the fourth F site, F(3) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one K(2), and one Re(1) atom. In the fifth F site, F(4) is bonded to one K(1), two equivalent K(2), and one Re(1) atom to form a mixture of distorted corner and edge-sharing FK3Re tetrahedra.