K2W2O5 crystallizes in the triclinic P1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(5), and two equivalent O(7) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(6), and two equivalent O(8) atoms. In the third K site, K(3) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(5), and two equivalent O(7) atoms. In the fourth K site, K(4) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(6), and two equivalent O(8) atoms. There are four inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 4°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 4°. In the third W site, W(3) is bonded in a rectangular see-saw-like geometry to one O(10), one O(5), one O(8), and one O(9) atom. In the fourth W site, W(4) is bonded in a rectangular see-saw-like geometry to one O(10), one O(6), one O(7), and one O(9) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the second O site, O(2) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the third O site, O(3) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the fourth O site, O(4) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the fifth O site, O(5) is bonded to two equivalent K(1), two equivalent K(3), one W(1), and one W(3) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the sixth O site, O(6) is bonded to two equivalent K(2), two equivalent K(4), one W(1), and one W(4) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the seventh O site, O(7) is bonded to two equivalent K(1), two equivalent K(3), one W(2), and one W(4) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the eighth O site, O(8) is bonded to two equivalent K(2), two equivalent K(4), one W(2), and one W(3) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the ninth O site, O(9) is bonded to one K(1), one K(2), one K(3), one K(4), one W(3), and one W(4) atom to form a mixture of corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 1-63°. In the tenth O site, O(10) is bonded to one K(1), one K(2), one K(3), one K(4), one W(3), and one W(4) atom to form a mixture of corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 1-63°.
K2W2O5 crystallizes in the triclinic P1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(5), and two equivalent O(7) atoms. The K(1)-O(1) bond length is 2.91 Å. The K(1)-O(10) bond length is 2.86 Å. The K(1)-O(2) bond length is 2.77 Å. The K(1)-O(3) bond length is 2.90 Å. The K(1)-O(4) bond length is 2.77 Å. The K(1)-O(9) bond length is 2.87 Å. There is one shorter (2.89 Å) and one longer (2.90 Å) K(1)-O(5) bond length. There is one shorter (2.78 Å) and one longer (3.01 Å) K(1)-O(7) bond length. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(6), and two equivalent O(8) atoms. The K(2)-O(1) bond length is 2.77 Å. The K(2)-O(10) bond length is 2.87 Å. The K(2)-O(2) bond length is 2.90 Å. The K(2)-O(3) bond length is 2.77 Å. The K(2)-O(4) bond length is 2.91 Å. The K(2)-O(9) bond length is 2.86 Å. There is one shorter (2.89 Å) and one longer (2.90 Å) K(2)-O(6) bond length. There is one shorter (2.78 Å) and one longer (3.01 Å) K(2)-O(8) bond length. In the third K site, K(3) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(5), and two equivalent O(7) atoms. The K(3)-O(1) bond length is 2.91 Å. The K(3)-O(10) bond length is 2.87 Å. The K(3)-O(2) bond length is 2.77 Å. The K(3)-O(3) bond length is 2.90 Å. The K(3)-O(4) bond length is 2.77 Å. The K(3)-O(9) bond length is 2.86 Å. There is one shorter (2.78 Å) and one longer (3.01 Å) K(3)-O(5) bond length. There is one shorter (2.89 Å) and one longer (2.90 Å) K(3)-O(7) bond length. In the fourth K site, K(4) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(6), and two equivalent O(8) atoms. The K(4)-O(1) bond length is 2.77 Å. The K(4)-O(10) bond length is 2.86 Å. The K(4)-O(2) bond length is 2.90 Å. The K(4)-O(3) bond length is 2.77 Å. The K(4)-O(4) bond length is 2.91 Å. The K(4)-O(9) bond length is 2.87 Å. There is one shorter (2.78 Å) and one longer (3.01 Å) K(4)-O(6) bond length. There is one shorter (2.88 Å) and one longer (2.90 Å) K(4)-O(8) bond length. There are four inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 4°. The W(1)-O(1) bond length is 2.15 Å. The W(1)-O(2) bond length is 2.03 Å. The W(1)-O(3) bond length is 2.04 Å. The W(1)-O(4) bond length is 2.15 Å. The W(1)-O(5) bond length is 2.10 Å. The W(1)-O(6) bond length is 2.10 Å. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 4°. The W(2)-O(1) bond length is 1.93 Å. The W(2)-O(2) bond length is 2.05 Å. The W(2)-O(3) bond length is 2.05 Å. The W(2)-O(4) bond length is 1.93 Å. The W(2)-O(7) bond length is 2.10 Å. The W(2)-O(8) bond length is 2.10 Å. In the third W site, W(3) is bonded in a rectangular see-saw-like geometry to one O(10), one O(5), one O(8), and one O(9) atom. The W(3)-O(10) bond length is 2.03 Å. The W(3)-O(5) bond length is 1.92 Å. The W(3)-O(8) bond length is 1.92 Å. The W(3)-O(9) bond length is 2.06 Å. In the fourth W site, W(4) is bonded in a rectangular see-saw-like geometry to one O(10), one O(6), one O(7), and one O(9) atom. The W(4)-O(10) bond length is 2.03 Å. The W(4)-O(6) bond length is 1.92 Å. The W(4)-O(7) bond length is 1.92 Å. The W(4)-O(9) bond length is 2.06 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the second O site, O(2) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the third O site, O(3) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the fourth O site, O(4) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the fifth O site, O(5) is bonded to two equivalent K(1), two equivalent K(3), one W(1), and one W(3) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the sixth O site, O(6) is bonded to two equivalent K(2), two equivalent K(4), one W(1), and one W(4) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the seventh O site, O(7) is bonded to two equivalent K(1), two equivalent K(3), one W(2), and one W(4) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the eighth O site, O(8) is bonded to two equivalent K(2), two equivalent K(4), one W(2), and one W(3) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the ninth O site, O(9) is bonded to one K(1), one K(2), one K(3), one K(4), one W(3), and one W(4) atom to form a mixture of corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 1-63°. In the tenth O site, O(10) is bonded to one K(1), one K(2), one K(3), one K(4), one W(3), and one W(4) atom to form a mixture of corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 1-63°.