Cs4NaYW11SiCO42CH3 crystallizes in the monoclinic P2_1/c space group. The structure consists of four 02329_fluka molecules inside a Cs4NaYW11SiCO42 framework. In the Cs4NaYW11SiCO42 framework, there are four inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 6-coordinate geometry to one O(21), one O(22), one O(38), one O(40), one O(41), and one O(8) atom. The Cs(1)-O(21) bond length is 2.92 Å. The Cs(1)-O(22) bond length is 3.05 Å. The Cs(1)-O(38) bond length is 2.86 Å. The Cs(1)-O(40) bond length is 2.75 Å. The Cs(1)-O(41) bond length is 3.11 Å. The Cs(1)-O(8) bond length is 2.87 Å. In the second Cs site, Cs(2) is bonded in a 7-coordinate geometry to one O(11), one O(28), one O(30), one O(31), one O(33), one O(34), and one O(9) atom. The Cs(2)-O(11) bond length is 2.96 Å. The Cs(2)-O(28) bond length is 3.08 Å. The Cs(2)-O(30) bond length is 3.00 Å. The Cs(2)-O(31) bond length is 3.01 Å. The Cs(2)-O(33) bond length is 2.89 Å. The Cs(2)-O(34) bond length is 2.84 Å. The Cs(2)-O(9) bond length is 2.97 Å. In the third Cs site, Cs(3) is bonded in a 7-coordinate geometry to one O(16), one O(19), one O(2), one O(26), one O(3), one O(35), and one O(37) atom. The Cs(3)-O(16) bond length is 2.99 Å. The Cs(3)-O(19) bond length is 2.87 Å. The Cs(3)-O(2) bond length is 2.80 Å. The Cs(3)-O(26) bond length is 3.00 Å. The Cs(3)-O(3) bond length is 2.83 Å. The Cs(3)-O(35) bond length is 2.90 Å. The Cs(3)-O(37) bond length is 2.88 Å. In the fourth Cs site, Cs(4) is bonded in a 8-coordinate geometry to one O(1), one O(17), one O(23), one O(25), one O(32), one O(38), one O(4), and one O(41) atom. The Cs(4)-O(1) bond length is 2.91 Å. The Cs(4)-O(17) bond length is 3.00 Å. The Cs(4)-O(23) bond length is 2.83 Å. The Cs(4)-O(25) bond length is 2.94 Å. The Cs(4)-O(32) bond length is 2.88 Å. The Cs(4)-O(38) bond length is 2.77 Å. The Cs(4)-O(4) bond length is 3.11 Å. The Cs(4)-O(41) bond length is 2.82 Å. Na(1) is bonded in a see-saw-like geometry to one O(22), one O(37), one O(40), and one O(5) atom. The Na(1)-O(22) bond length is 2.37 Å. The Na(1)-O(37) bond length is 2.44 Å. The Na(1)-O(40) bond length is 2.36 Å. The Na(1)-O(5) bond length is 2.52 Å. Y(1) is bonded in a 7-coordinate geometry to one O(10), one O(12), one O(17), one O(4), one O(41), and two equivalent O(39) atoms. The Y(1)-O(10) bond length is 2.30 Å. The Y(1)-O(12) bond length is 2.29 Å. The Y(1)-O(17) bond length is 2.33 Å. The Y(1)-O(4) bond length is 2.34 Å. The Y(1)-O(41) bond length is 2.44 Å. There is one shorter (2.42 Å) and one longer (2.44 Å) Y(1)-O(39) bond length. There are eleven inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to one O(19), one O(30), one O(31), one O(35), one O(42), and one O(5) atom. The W(1)-O(19) bond length is 1.89 Å. The W(1)-O(30) bond length is 1.90 Å. The W(1)-O(31) bond length is 1.90 Å. The W(1)-O(35) bond length is 1.91 Å. The W(1)-O(42) bond length is 2.35 Å. The W(1)-O(5) bond length is 1.71 Å. In the second W site, W(2) is bonded in a 6-coordinate geometry to one O(14), one O(18), one O(26), one O(29), one O(3), and one O(35) atom. The W(2)-O(14) bond length is 2.38 Å. The W(2)-O(18) bond length is 1.86 Å. The W(2)-O(26) bond length is 1.94 Å. The W(2)-O(29) bond length is 1.91 Å. The W(2)-O(3) bond length is 1.70 Å. The W(2)-O(35) bond length is 1.94 Å. In the third W site, W(3) is bonded in a 6-coordinate geometry to one O(11), one O(14), one O(16), one O(26), one O(27), and one O(28) atom. The W(3)-O(11) bond length is 1.74 Å. The W(3)-O(14) bond length is 2.33 Å. The W(3)-O(16) bond length is 1.89 Å. The W(3)-O(26) bond length is 1.92 Å. The W(3)-O(27) bond length is 1.90 Å. The W(3)-O(28) bond length is 1.87 Å. In the fourth W site, W(4) is bonded to one O(10), one O(13), one O(28), one O(6), one O(7), and one O(9) atom to form distorted WO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra and  an edgeedge with one W(8)O6 octahedra. The W(4)-O(10) bond length is 1.77 Å. The W(4)-O(13) bond length is 2.27 Å. The W(4)-O(28) bond length is 1.94 Å. The W(4)-O(6) bond length is 2.07 Å. The W(4)-O(7) bond length is 1.96 Å. The W(4)-O(9) bond length is 1.72 Å. In the fifth W site, W(5) is bonded in a 6-coordinate geometry to one O(12), one O(14), one O(18), one O(27), one O(36), and one O(8) atom. The W(5)-O(12) bond length is 1.75 Å. The W(5)-O(14) bond length is 2.35 Å. The W(5)-O(18) bond length is 2.05 Å. The W(5)-O(27) bond length is 1.97 Å. The W(5)-O(36) bond length is 1.94 Å. The W(5)-O(8) bond length is 1.74 Å. In the sixth W site, W(6) is bonded in a 6-coordinate geometry to one O(16), one O(19), one O(2), one O(20), one O(42), and one O(6) atom. The W(6)-O(16) bond length is 1.93 Å. The W(6)-O(19) bond length is 2.00 Å. The W(6)-O(2) bond length is 1.71 Å. The W(6)-O(20) bond length is 1.92 Å. The W(6)-O(42) bond length is 2.40 Å. The W(6)-O(6) bond length is 1.83 Å. In the seventh W site, W(7) is bonded to one O(15), one O(25), one O(32), one O(33), and one O(34) atom to form distorted WO5 square pyramids that share  a cornercorner with one W(8)O6 octahedra,  a cornercorner with one W(11)O5 square pyramid, and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 26°. The W(7)-O(15) bond length is 2.33 Å. The W(7)-O(25) bond length is 1.88 Å. The W(7)-O(32) bond length is 1.91 Å. The W(7)-O(33) bond length is 1.91 Å. The W(7)-O(34) bond length is 1.95 Å. In the eighth W site, W(8) is bonded to one O(13), one O(23), one O(24), one O(25), one O(4), and one O(7) atom to form distorted WO6 octahedra that share  a cornercorner with one W(11)O5 square pyramid,  a cornercorner with one W(7)O5 square pyramid,  a cornercorner with one Si(1)O4 tetrahedra, and  an edgeedge with one W(4)O6 octahedra. The W(8)-O(13) bond length is 2.30 Å. The W(8)-O(23) bond length is 1.73 Å. The W(8)-O(24) bond length is 2.07 Å. The W(8)-O(25) bond length is 1.96 Å. The W(8)-O(4) bond length is 1.77 Å. The W(8)-O(7) bond length is 1.91 Å. In the ninth W site, W(9) is bonded in a 6-coordinate geometry to one O(1), one O(15), one O(17), one O(21), one O(32), and one O(36) atom. The W(9)-O(1) bond length is 1.75 Å. The W(9)-O(15) bond length is 2.37 Å. The W(9)-O(17) bond length is 1.78 Å. The W(9)-O(21) bond length is 2.05 Å. The W(9)-O(32) bond length is 1.98 Å. The W(9)-O(36) bond length is 1.91 Å. In the tenth W site, W(10) is bonded in a 6-coordinate geometry to one O(15), one O(21), one O(22), one O(29), one O(31), and one O(33) atom. The W(10)-O(15) bond length is 2.42 Å. The W(10)-O(21) bond length is 1.85 Å. The W(10)-O(22) bond length is 1.74 Å. The W(10)-O(29) bond length is 1.91 Å. The W(10)-O(31) bond length is 1.95 Å. The W(10)-O(33) bond length is 1.95 Å. In the eleventh W site, W(11) is bonded to one O(20), one O(24), one O(30), one O(34), and one O(42) atom to form distorted WO5 square pyramids that share  a cornercorner with one W(8)O6 octahedra,  a cornercorner with one W(7)O5 square pyramid, and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 29°. The W(11)-O(20) bond length is 1.95 Å. The W(11)-O(24) bond length is 1.82 Å. The W(11)-O(30) bond length is 1.98 Å. The W(11)-O(34) bond length is 1.90 Å. The W(11)-O(42) bond length is 2.32 Å. Si(1) is bonded to one O(13), one O(14), one O(15), and one O(42) atom to form SiO4 tetrahedra that share  a cornercorner with one W(4)O6 octahedra,  a cornercorner with one W(8)O6 octahedra,  a cornercorner with one W(11)O5 square pyramid, and  a cornercorner with one W(7)O5 square pyramid. The corner-sharing octahedral tilt angles range from 52-53°. The Si(1)-O(13) bond length is 1.59 Å. The Si(1)-O(14) bond length is 1.64 Å. The Si(1)-O(15) bond length is 1.63 Å. The Si(1)-O(42) bond length is 1.60 Å. C(1) is bonded in a distorted bent 120 degrees geometry to one O(39) and one O(41) atom. The C(1)-O(39) bond length is 1.27 Å. The C(1)-O(41) bond length is 1.23 Å. There are forty-two inequivalent O sites. In the first O site, O(37) is bonded in a bent 120 degrees geometry to one Cs(3) and one Na(1) atom. In the second O site, O(38) is bonded in an L-shaped geometry to one Cs(1) and one Cs(4) atom. In the third O site, O(39) is bonded in a distorted single-bond geometry to two equivalent Y(1) and one C(1) atom. In the fourth O site, O(40) is bonded in a water-like geometry to one Cs(1) and one Na(1) atom. In the fifth O site, O(41) is bonded in a distorted single-bond geometry to one Cs(1), one Cs(4), one Y(1), and one C(1) atom. In the sixth O site, O(42) is bonded in a distorted single-bond geometry to one W(1), one W(11), one W(6), and one Si(1) atom. In the seventh O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Cs(4) and one W(9) atom. In the eighth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cs(3) and one W(6) atom. In the ninth O site, O(3) is bonded in a distorted single-bond geometry to one Cs(3) and one W(2) atom. In the tenth O site, O(4) is bonded in a 2-coordinate geometry to one Cs(4), one Y(1), and one W(8) atom. In the eleventh O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one W(1) atom. In the twelfth O site, O(6) is bonded in a bent 150 degrees geometry to one W(4) and one W(6) atom. In the thirteenth O site, O(7) is bonded in a bent 120 degrees geometry to one W(4) and one W(8) atom. In the fourteenth O site, O(8) is bonded in a distorted single-bond geometry to one Cs(1) and one W(5) atom. In the fifteenth O site, O(9) is bonded in a distorted single-bond geometry to one Cs(2) and one W(4) atom. In the sixteenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one W(4) atom. In the seventeenth O site, O(11) is bonded in a distorted single-bond geometry to one Cs(2) and one W(3) atom. In the eighteenth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one Y(1) and one W(5) atom. In the nineteenth O site, O(13) is bonded in a distorted single-bond geometry to one W(4), one W(8), and one Si(1) atom. In the twentieth O site, O(14) is bonded in a distorted single-bond geometry to one W(2), one W(3), one W(5), and one Si(1) atom. In the twenty-first O site, O(15) is bonded in a distorted single-bond geometry to one W(10), one W(7), one W(9), and one Si(1) atom. In the twenty-second O site, O(16) is bonded in a distorted bent 150 degrees geometry to one Cs(3), one W(3), and one W(6) atom. In the twenty-third O site, O(17) is bonded in a 2-coordinate geometry to one Cs(4), one Y(1), and one W(9) atom. In the twenty-fourth O site, O(18) is bonded in a bent 120 degrees geometry to one W(2) and one W(5) atom. In the twenty-fifth O site, O(19) is bonded in a distorted trigonal non-coplanar geometry to one Cs(3), one W(1), and one W(6) atom. In the twenty-sixth O site, O(20) is bonded in a bent 120 degrees geometry to one W(11) and one W(6) atom. In the twenty-seventh O site, O(21) is bonded in a 3-coordinate geometry to one Cs(1), one W(10), and one W(9) atom. In the twenty-eighth O site, O(22) is bonded in a 3-coordinate geometry to one Cs(1), one Na(1), and one W(10) atom. In the twenty-ninth O site, O(23) is bonded in a distorted single-bond geometry to one Cs(4) and one W(8) atom. In the thirtieth O site, O(24) is bonded in a bent 150 degrees geometry to one W(11) and one W(8) atom. In the thirty-first O site, O(25) is bonded in a distorted bent 150 degrees geometry to one Cs(4), one W(7), and one W(8) atom. In the thirty-second O site, O(26) is bonded in a distorted bent 120 degrees geometry to one Cs(3), one W(2), and one W(3) atom. In the thirty-third O site, O(27) is bonded in a bent 120 degrees geometry to one W(3) and one W(5) atom. In the thirty-fourth O site, O(28) is bonded in a distorted bent 150 degrees geometry to one Cs(2), one W(3), and one W(4) atom. In the thirty-fifth O site, O(29) is bonded in a bent 150 degrees geometry to one W(10) and one W(2) atom. In the thirty-sixth O site, O(30) is bonded in a 3-coordinate geometry to one Cs(2), one W(1), and one W(11) atom. In the thirty-seventh O site, O(31) is bonded in a distorted bent 150 degrees geometry to one Cs(2), one W(1), and one W(10) atom. In the thirty-eighth O site, O(32) is bonded in a distorted trigonal non-coplanar geometry to one Cs(4), one W(7), and one W(9) atom. In the thirty-ninth O site, O(33) is bonded in a distorted bent 120 degrees geometry to one Cs(2), one W(10), and one W(7) atom. In the fortieth O site, O(34) is bonded in a 3-coordinate geometry to one Cs(2), one W(11), and one W(7) atom. In the forty-first O site, O(35) is bonded in a distorted bent 150 degrees geometry to one Cs(3), one W(1), and one W(2) atom. In the forty-second O site, O(36) is bonded in a bent 150 degrees geometry to one W(5) and one W(9) atom. Linkers: 4 CC([O])=O. Metal clusters: 16 [Cs] ,4 [Na] ,4 [Y] ,44 [W]. The MOF has largest included sphere 4.53 A, density 4.47 g/cm3, surface area 1064.89 m2/g, accessible volume 0.08 cm3/g