K4Re6Se8O11 crystallizes in the triclinic P1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one Se(1), one O(1), one O(10), one O(11), one O(5), and one O(7) atom. In the second K site, K(2) is bonded in a 4-coordinate geometry to one O(11), one O(2), one O(6), one O(8), and one O(9) atom. In the third K site, K(3) is bonded in a distorted square pyramidal geometry to one Se(2), one O(10), one O(2), one O(5), one O(7), and one O(8) atom. In the fourth K site, K(4) is bonded in a distorted rectangular see-saw-like geometry to one Se(1), one O(1), one O(6), one O(7), and one O(8) atom. There are six inequivalent Re sites. In the first Re site, Re(1) is bonded in a distorted single-bond geometry to one Se(1), one Se(3), one Se(5), one Se(7), and one O(3) atom. In the second Re site, Re(2) is bonded in a distorted single-bond geometry to one Se(2), one Se(4), one Se(6), and one O(4) atom. In the third Re site, Re(3) is bonded in a distorted single-bond geometry to one Se(1), one Se(4), one Se(6), and one O(7) atom. In the fourth Re site, Re(4) is bonded in a distorted single-bond geometry to one Se(2), one Se(3), one Se(5), and one O(8) atom. In the fifth Re site, Re(5) is bonded in a distorted single-bond geometry to one Se(1), one Se(4), one Se(5), and one O(9) atom. In the sixth Re site, Re(6) is bonded in a distorted single-bond geometry to one Se(2), one Se(3), one Se(6), one Se(7), and one O(10) atom. There are eight inequivalent Se sites. In the first Se site, Se(1) is bonded in a 5-coordinate geometry to one K(1), one K(4), one Re(1), one Re(3), and one Re(5) atom. In the second Se site, Se(2) is bonded in a 4-coordinate geometry to one K(3), one Re(2), one Re(4), and one Re(6) atom. In the third Se site, Se(3) is bonded in a 3-coordinate geometry to one Re(1), one Re(4), and one Re(6) atom. In the fourth Se site, Se(4) is bonded in a 3-coordinate geometry to one Re(2), one Re(3), and one Re(5) atom. In the fifth Se site, Se(5) is bonded in a 3-coordinate geometry to one Re(1), one Re(4), and one Re(5) atom. In the sixth Se site, Se(6) is bonded in a 4-coordinate geometry to one Re(2), one Re(3), one Re(6), and one O(2) atom. In the seventh Se site, Se(7) is bonded in a 3-coordinate geometry to one Re(1), one Re(6), and one O(11) atom. In the eighth Se site, Se(8) is bonded in a trigonal non-coplanar geometry to one O(1), one O(5), and one O(6) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one K(4), and one Se(8) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(2), one K(3), one Se(6), and one O(11) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Re(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Re(2) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one K(1), one K(3), and one Se(8) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one K(2), one K(4), and one Se(8) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one K(3), one K(4), and one Re(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one K(2), one K(3), one K(4), and one Re(4) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one K(2) and one Re(5) atom. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one K(3), and one Re(6) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Se(7), and one O(2) atom.
K4Re6Se8O11 crystallizes in the triclinic P1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one Se(1), one O(1), one O(10), one O(11), one O(5), and one O(7) atom. The K(1)-Se(1) bond length is 3.71 Å. The K(1)-O(1) bond length is 2.66 Å. The K(1)-O(10) bond length is 2.84 Å. The K(1)-O(11) bond length is 2.81 Å. The K(1)-O(5) bond length is 2.65 Å. The K(1)-O(7) bond length is 2.89 Å. In the second K site, K(2) is bonded in a 4-coordinate geometry to one O(11), one O(2), one O(6), one O(8), and one O(9) atom. The K(2)-O(11) bond length is 3.04 Å. The K(2)-O(2) bond length is 2.83 Å. The K(2)-O(6) bond length is 2.65 Å. The K(2)-O(8) bond length is 3.09 Å. The K(2)-O(9) bond length is 2.88 Å. In the third K site, K(3) is bonded in a distorted square pyramidal geometry to one Se(2), one O(10), one O(2), one O(5), one O(7), and one O(8) atom. The K(3)-Se(2) bond length is 3.62 Å. The K(3)-O(10) bond length is 2.77 Å. The K(3)-O(2) bond length is 2.85 Å. The K(3)-O(5) bond length is 2.60 Å. The K(3)-O(7) bond length is 2.91 Å. The K(3)-O(8) bond length is 3.01 Å. In the fourth K site, K(4) is bonded in a distorted rectangular see-saw-like geometry to one Se(1), one O(1), one O(6), one O(7), and one O(8) atom. The K(4)-Se(1) bond length is 3.70 Å. The K(4)-O(1) bond length is 2.70 Å. The K(4)-O(6) bond length is 2.63 Å. The K(4)-O(7) bond length is 2.80 Å. The K(4)-O(8) bond length is 3.04 Å. There are six inequivalent Re sites. In the first Re site, Re(1) is bonded in a distorted single-bond geometry to one Se(1), one Se(3), one Se(5), one Se(7), and one O(3) atom. The Re(1)-Se(1) bond length is 2.64 Å. The Re(1)-Se(3) bond length is 2.55 Å. The Re(1)-Se(5) bond length is 2.60 Å. The Re(1)-Se(7) bond length is 2.54 Å. The Re(1)-O(3) bond length is 1.75 Å. In the second Re site, Re(2) is bonded in a distorted single-bond geometry to one Se(2), one Se(4), one Se(6), and one O(4) atom. The Re(2)-Se(2) bond length is 2.68 Å. The Re(2)-Se(4) bond length is 2.51 Å. The Re(2)-Se(6) bond length is 2.49 Å. The Re(2)-O(4) bond length is 1.76 Å. In the third Re site, Re(3) is bonded in a distorted single-bond geometry to one Se(1), one Se(4), one Se(6), and one O(7) atom. The Re(3)-Se(1) bond length is 2.53 Å. The Re(3)-Se(4) bond length is 2.55 Å. The Re(3)-Se(6) bond length is 2.53 Å. The Re(3)-O(7) bond length is 1.83 Å. In the fourth Re site, Re(4) is bonded in a distorted single-bond geometry to one Se(2), one Se(3), one Se(5), and one O(8) atom. The Re(4)-Se(2) bond length is 2.56 Å. The Re(4)-Se(3) bond length is 2.51 Å. The Re(4)-Se(5) bond length is 2.53 Å. The Re(4)-O(8) bond length is 1.78 Å. In the fifth Re site, Re(5) is bonded in a distorted single-bond geometry to one Se(1), one Se(4), one Se(5), and one O(9) atom. The Re(5)-Se(1) bond length is 2.51 Å. The Re(5)-Se(4) bond length is 2.55 Å. The Re(5)-Se(5) bond length is 2.52 Å. The Re(5)-O(9) bond length is 1.78 Å. In the sixth Re site, Re(6) is bonded in a distorted single-bond geometry to one Se(2), one Se(3), one Se(6), one Se(7), and one O(10) atom. The Re(6)-Se(2) bond length is 2.61 Å. The Re(6)-Se(3) bond length is 2.53 Å. The Re(6)-Se(6) bond length is 2.60 Å. The Re(6)-Se(7) bond length is 2.55 Å. The Re(6)-O(10) bond length is 1.81 Å. There are eight inequivalent Se sites. In the first Se site, Se(1) is bonded in a 5-coordinate geometry to one K(1), one K(4), one Re(1), one Re(3), and one Re(5) atom. In the second Se site, Se(2) is bonded in a 4-coordinate geometry to one K(3), one Re(2), one Re(4), and one Re(6) atom. In the third Se site, Se(3) is bonded in a 3-coordinate geometry to one Re(1), one Re(4), and one Re(6) atom. In the fourth Se site, Se(4) is bonded in a 3-coordinate geometry to one Re(2), one Re(3), and one Re(5) atom. In the fifth Se site, Se(5) is bonded in a 3-coordinate geometry to one Re(1), one Re(4), and one Re(5) atom. In the sixth Se site, Se(6) is bonded in a 4-coordinate geometry to one Re(2), one Re(3), one Re(6), and one O(2) atom. The Se(6)-O(2) bond length is 2.64 Å. In the seventh Se site, Se(7) is bonded in a 3-coordinate geometry to one Re(1), one Re(6), and one O(11) atom. The Se(7)-O(11) bond length is 2.07 Å. In the eighth Se site, Se(8) is bonded in a trigonal non-coplanar geometry to one O(1), one O(5), and one O(6) atom. The Se(8)-O(1) bond length is 1.73 Å. The Se(8)-O(5) bond length is 1.73 Å. The Se(8)-O(6) bond length is 1.74 Å. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one K(4), and one Se(8) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(2), one K(3), one Se(6), and one O(11) atom. The O(2)-O(11) bond length is 1.37 Å. In the third O site, O(3) is bonded in a single-bond geometry to one Re(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Re(2) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one K(1), one K(3), and one Se(8) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one K(2), one K(4), and one Se(8) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one K(3), one K(4), and one Re(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one K(2), one K(3), one K(4), and one Re(4) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one K(2) and one Re(5) atom. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one K(3), and one Re(6) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Se(7), and one O(2) atom.