BaCuC10H14O9 crystallizes in the trigonal R-3 space group. Ba(1) is bonded in a 9-coordinate geometry to one O(2), one O(4), one O(6), one O(7), one O(8), two equivalent O(1), and two equivalent O(9) atoms. The Ba(1)-O(2) bond length is 3.13 Å. The Ba(1)-O(4) bond length is 2.78 Å. The Ba(1)-O(6) bond length is 2.91 Å. The Ba(1)-O(7) bond length is 2.76 Å. The Ba(1)-O(8) bond length is 2.78 Å. Both Ba(1)-O(1) bond lengths are 2.74 Å. There is one shorter (2.82 Å) and one longer (3.03 Å) Ba(1)-O(9) bond length. Cu(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(4), one O(5), and one O(6) atom. The Cu(1)-O(2) bond length is 1.96 Å. The Cu(1)-O(4) bond length is 1.93 Å. The Cu(1)-O(5) bond length is 1.93 Å. The Cu(1)-O(6) bond length is 1.93 Å. There are ten inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(4), and one O(8) atom. The C(1)-C(4) bond length is 1.54 Å. The C(1)-O(4) bond length is 1.31 Å. The C(1)-O(8) bond length is 1.25 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(6), and one O(9) atom. The C(2)-C(7) bond length is 1.54 Å. The C(2)-O(6) bond length is 1.29 Å. The C(2)-O(9) bond length is 1.26 Å. In the third C site, C(3) is bonded in a trigonal non-coplanar geometry to one C(4), one H(1), one H(2), and one H(3) atom. The C(3)-C(4) bond length is 1.55 Å. The C(3)-H(1) bond length is 1.10 Å. The C(3)-H(2) bond length is 1.10 Å. The C(3)-H(3) bond length is 1.10 Å. In the fourth C site, C(4) is bonded in a tetrahedral geometry to one C(1), one C(3), one C(5), and one C(6) atom. The C(4)-C(5) bond length is 1.54 Å. The C(4)-C(6) bond length is 1.53 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(5), and one O(7) atom. The C(5)-O(5) bond length is 1.30 Å. The C(5)-O(7) bond length is 1.25 Å. In the sixth C site, C(6) is bonded in a trigonal non-coplanar geometry to one C(4), one H(4), one H(5), and one H(6) atom. The C(6)-H(4) bond length is 1.10 Å. The C(6)-H(5) bond length is 1.09 Å. The C(6)-H(6) bond length is 1.10 Å. In the seventh C site, C(7) is bonded in a tetrahedral geometry to one C(10), one C(2), one C(8), and one C(9) atom. The C(7)-C(10) bond length is 1.53 Å. The C(7)-C(8) bond length is 1.55 Å. The C(7)-C(9) bond length is 1.55 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(2), and one O(3) atom. The C(8)-O(2) bond length is 1.30 Å. The C(8)-O(3) bond length is 1.25 Å. In the ninth C site, C(9) is bonded in a trigonal non-coplanar geometry to one C(7), one H(7), one H(8), and one H(9) atom. The C(9)-H(7) bond length is 1.10 Å. The C(9)-H(8) bond length is 1.10 Å. The C(9)-H(9) bond length is 1.10 Å. In the tenth C site, C(10) is bonded in a trigonal non-coplanar geometry to one C(7); one H(10); and two equivalent H(11,12) atoms. The C(10)-H(10) bond length is 1.10 Å. Both C(10)-H(11,12) bond lengths are 1.10 Å. There are thirteen inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(6) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(6) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(9) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(9) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(9) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(10) atom. In the eleventh H site, H(11,12) is bonded in a single-bond geometry to one C(10) atom. In the twelfth H site, H(13) is bonded in a distorted linear geometry to one O(1) and one O(3) atom. The H(13)-O(1) bond length is 1.01 Å. The H(13)-O(3) bond length is 1.64 Å. In the thirteenth H site, H(14) is bonded in a single-bond geometry to one O(1) and one O(5) atom. The H(14)-O(1) bond length is 0.99 Å. The H(14)-O(5) bond length is 1.73 Å. There are nine inequivalent O sites. In the first O site, O(9) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one C(2) atom. In the second O site, O(1) is bonded in a distorted water-like geometry to two equivalent Ba(1), one H(13), and one H(14) atom. In the third O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Cu(1), and one C(8) atom. In the fourth O site, O(3) is bonded in a bent 120 degrees geometry to one C(8) and one H(13) atom. In the fifth O site, O(4) is bonded in a 3-coordinate geometry to one Ba(1), one Cu(1), and one C(1) atom. In the sixth O site, O(5) is bonded in a 3-coordinate geometry to one Cu(1), one C(5), and one H(14) atom. In the seventh O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Cu(1), and one C(2) atom. In the eighth O site, O(7) is bonded in a distorted single-bond geometry to one Ba(1) and one C(5) atom. In the ninth O site, O(8) is bonded in a distorted single-bond geometry to one Ba(1) and one C(1) atom. Linkers: 12 CC(C)(C([O])=O)C([O])=O. Metal clusters: 6 [Ba] ,6 [Cu]. The MOF has largest included sphere 5.01 A, density 2.03 g/cm3, surface area 3246.35 m2/g, accessible volume 0.17 cm3/g