La2S4O17 crystallizes in the monoclinic P2_1/c space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 11-coordinate geometry to one O(18), one O(19), one O(20), one O(21), one O(22), one O(23), one O(24), one O(28), one O(29), one O(5), and one O(8) atom. The La(1)-O(18) bond length is 2.55 Å. The La(1)-O(19) bond length is 2.74 Å. The La(1)-O(20) bond length is 2.60 Å. The La(1)-O(21) bond length is 2.67 Å. The La(1)-O(22) bond length is 2.63 Å. The La(1)-O(23) bond length is 3.05 Å. The La(1)-O(24) bond length is 2.57 Å. The La(1)-O(28) bond length is 2.59 Å. The La(1)-O(29) bond length is 2.63 Å. The La(1)-O(5) bond length is 2.77 Å. The La(1)-O(8) bond length is 2.79 Å. In the second La site, La(2) is bonded in a 10-coordinate geometry to one O(2), one O(25), one O(26), one O(27), one O(30), one O(31), one O(33), one O(6), one O(7), and one O(9) atom. The La(2)-O(2) bond length is 2.47 Å. The La(2)-O(25) bond length is 2.56 Å. The La(2)-O(26) bond length is 2.62 Å. The La(2)-O(27) bond length is 2.51 Å. The La(2)-O(30) bond length is 2.71 Å. The La(2)-O(31) bond length is 3.18 Å. The La(2)-O(33) bond length is 2.65 Å. The La(2)-O(6) bond length is 2.51 Å. The La(2)-O(7) bond length is 2.88 Å. The La(2)-O(9) bond length is 2.44 Å. In the third La site, La(3) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(12), one O(15), one O(3), one O(33), one O(34), and one O(4) atom. The La(3)-O(10) bond length is 2.48 Å. The La(3)-O(11) bond length is 2.43 Å. The La(3)-O(12) bond length is 2.44 Å. The La(3)-O(15) bond length is 2.51 Å. The La(3)-O(3) bond length is 2.50 Å. The La(3)-O(33) bond length is 2.70 Å. The La(3)-O(34) bond length is 2.61 Å. The La(3)-O(4) bond length is 2.50 Å. In the fourth La site, La(4) is bonded in a 8-coordinate geometry to one O(1), one O(13), one O(14), one O(16), one O(23), one O(31), one O(5), and one O(7) atom. The La(4)-O(1) bond length is 2.49 Å. The La(4)-O(13) bond length is 2.59 Å. The La(4)-O(14) bond length is 2.47 Å. The La(4)-O(16) bond length is 2.48 Å. The La(4)-O(23) bond length is 2.57 Å. The La(4)-O(31) bond length is 2.53 Å. The La(4)-O(5) bond length is 2.65 Å. The La(4)-O(7) bond length is 2.61 Å. There are eight inequivalent S sites. In the first S site, S(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The S(1)-O(1) bond length is 1.44 Å. The S(1)-O(2) bond length is 1.46 Å. The S(1)-O(3) bond length is 1.45 Å. The S(1)-O(4) bond length is 1.47 Å. In the second S site, S(2) is bonded in a tetrahedral geometry to one O(5), one O(6), one O(7), and one O(8) atom. The S(2)-O(5) bond length is 1.48 Å. The S(2)-O(6) bond length is 1.47 Å. The S(2)-O(7) bond length is 1.50 Å. The S(2)-O(8) bond length is 1.45 Å. In the third S site, S(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(13), one O(14), and one O(9) atom. The S(3)-O(10) bond length is 1.44 Å. The S(3)-O(11) bond length is 1.37 Å. The S(3)-O(12) bond length is 1.58 Å. The S(3)-O(13) bond length is 1.41 Å. The S(3)-O(14) bond length is 1.54 Å. The S(3)-O(9) bond length is 1.47 Å. In the fourth S site, S(4) is bonded in a tetrahedral geometry to one O(15), one O(16), one O(17), and one O(18) atom. The S(4)-O(15) bond length is 1.47 Å. The S(4)-O(16) bond length is 1.49 Å. The S(4)-O(17) bond length is 1.47 Å. The S(4)-O(18) bond length is 1.46 Å. In the fifth S site, S(5) is bonded in a tetrahedral geometry to one O(19), one O(20), one O(21), and one O(22) atom. The S(5)-O(19) bond length is 1.46 Å. The S(5)-O(20) bond length is 1.47 Å. The S(5)-O(21) bond length is 1.47 Å. The S(5)-O(22) bond length is 1.49 Å. In the sixth S site, S(6) is bonded in a tetrahedral geometry to one O(23), one O(24), one O(25), and one O(26) atom. The S(6)-O(23) bond length is 1.47 Å. The S(6)-O(24) bond length is 1.46 Å. The S(6)-O(25) bond length is 1.47 Å. The S(6)-O(26) bond length is 1.47 Å. In the seventh S site, S(7) is bonded in a tetrahedral geometry to one O(27), one O(28), one O(29), and one O(30) atom. The S(7)-O(27) bond length is 1.47 Å. The S(7)-O(28) bond length is 1.46 Å. The S(7)-O(29) bond length is 1.48 Å. The S(7)-O(30) bond length is 1.48 Å. In the eighth S site, S(8) is bonded in a tetrahedral geometry to one O(31), one O(32), one O(33), and one O(34) atom. The S(8)-O(31) bond length is 1.47 Å. The S(8)-O(32) bond length is 1.43 Å. The S(8)-O(33) bond length is 1.49 Å. The S(8)-O(34) bond length is 1.48 Å. There are thirty-four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one La(4) and one S(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one La(2) and one S(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one La(3) and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one La(3) and one S(1) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one La(1), one La(4), and one S(2) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one La(2) and one S(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one La(2), one La(4), and one S(2) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one La(1) and one S(2) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one La(2) and one S(3) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one La(3) and one S(3) atom. In the eleventh O site, O(11) is bonded in a 2-coordinate geometry to one La(3), one S(3), and one O(12) atom. The O(11)-O(12) bond length is 0.94 Å. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one La(3), one S(3), and one O(11) atom. In the thirteenth O site, O(13) is bonded in a 2-coordinate geometry to one La(4), one S(3), and one O(14) atom. The O(13)-O(14) bond length is 0.93 Å. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one La(4), one S(3), and one O(13) atom. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one La(3) and one S(4) atom. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one La(4) and one S(4) atom. In the seventeenth O site, O(17) is bonded in a single-bond geometry to one S(4) atom. In the eighteenth O site, O(18) is bonded in a distorted bent 150 degrees geometry to one La(1) and one S(4) atom. In the nineteenth O site, O(19) is bonded in a single-bond geometry to one La(1) and one S(5) atom. In the twentieth O site, O(20) is bonded in a distorted single-bond geometry to one La(1) and one S(5) atom. In the twenty-first O site, O(21) is bonded in a distorted single-bond geometry to one La(1) and one S(5) atom. In the twenty-second O site, O(22) is bonded in a distorted single-bond geometry to one La(1) and one S(5) atom. In the twenty-third O site, O(23) is bonded in a distorted single-bond geometry to one La(1), one La(4), and one S(6) atom. In the twenty-fourth O site, O(24) is bonded in a distorted bent 120 degrees geometry to one La(1) and one S(6) atom. In the twenty-fifth O site, O(25) is bonded in a distorted water-like geometry to one La(2) and one S(6) atom. In the twenty-sixth O site, O(26) is bonded in a distorted single-bond geometry to one La(2) and one S(6) atom. In the twenty-seventh O site, O(27) is bonded in a distorted water-like geometry to one La(2) and one S(7) atom. In the twenty-eighth O site, O(28) is bonded in a distorted single-bond geometry to one La(1) and one S(7) atom. In the twenty-ninth O site, O(29) is bonded in a distorted single-bond geometry to one La(1) and one S(7) atom. In the thirtieth O site, O(30) is bonded in a single-bond geometry to one La(2) and one S(7) atom. In the thirty-first O site, O(31) is bonded in a distorted single-bond geometry to one La(2), one La(4), and one S(8) atom. In the thirty-second O site, O(32) is bonded in a single-bond geometry to one S(8) atom. In the thirty-third O site, O(33) is bonded in a distorted single-bond geometry to one La(2), one La(3), and one S(8) atom. In the thirty-fourth O site, O(34) is bonded in a distorted water-like geometry to one La(3) and one S(8) atom. Linkers: 4 [O]OS([O])([O])O[O]. Metal clusters: 16 [La]. The MOF has largest included sphere 4.43 A, density 2.56 g/cm3, surface area 1921.47 m2/g, accessible volume 0.14 cm3/g