KSrNb2O6F crystallizes in the orthorhombic Immm space group. K(1) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to four equivalent O(3), four equivalent O(4), and four equivalent F(1) atoms to form a mixture of face and corner-sharing SrO8F4 cuboctahedra. In the second Sr site, Sr(2) is bonded to four equivalent O(2), four equivalent O(3), and four equivalent F(1) atoms to form a mixture of face and corner-sharing SrO8F4 cuboctahedra. Nb(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), two equivalent O(3), and one F(1) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Nb(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sr(2) and two equivalent Nb(1) atoms. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sr(1), one Sr(2), and two equivalent Nb(1) atoms. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(1) and two equivalent Nb(1) atoms. F(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Nb(1) atoms to form a mixture of edge and corner-sharing FSr4Nb2 octahedra. The corner-sharing octahedra are not tilted.
KSrNb2O6F crystallizes in the orthorhombic Immm space group. K(1) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. There are two shorter (2.77 Å) and four longer (2.87 Å) K(1)-O(1) bond lengths. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to four equivalent O(3), four equivalent O(4), and four equivalent F(1) atoms to form a mixture of face and corner-sharing SrO8F4 cuboctahedra. All Sr(1)-O(3) bond lengths are 2.76 Å. All Sr(1)-O(4) bond lengths are 2.85 Å. All Sr(1)-F(1) bond lengths are 2.67 Å. In the second Sr site, Sr(2) is bonded to four equivalent O(2), four equivalent O(3), and four equivalent F(1) atoms to form a mixture of face and corner-sharing SrO8F4 cuboctahedra. All Sr(2)-O(2) bond lengths are 2.68 Å. All Sr(2)-O(3) bond lengths are 2.74 Å. All Sr(2)-F(1) bond lengths are 2.86 Å. Nb(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), two equivalent O(3), and one F(1) atom. The Nb(1)-O(1) bond length is 1.79 Å. The Nb(1)-O(2) bond length is 2.02 Å. The Nb(1)-O(4) bond length is 2.00 Å. Both Nb(1)-O(3) bond lengths are 2.02 Å. The Nb(1)-F(1) bond length is 2.46 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Nb(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sr(2) and two equivalent Nb(1) atoms. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sr(1), one Sr(2), and two equivalent Nb(1) atoms. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(1) and two equivalent Nb(1) atoms. F(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Nb(1) atoms to form a mixture of edge and corner-sharing FSr4Nb2 octahedra. The corner-sharing octahedra are not tilted.