Ca3Eu2C32H8(NO4)6(CH)10 crystallizes in the monoclinic P2/c space group. The structure consists of twenty 02329_fluka molecules inside a Ca3Eu2C32H8(NO4)6 framework. In the Ca3Eu2C32H8(NO4)6 framework, there are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 4-coordinate geometry to two equivalent O(4) and two equivalent O(8) atoms. Both Ca(1)-O(4) bond lengths are 2.47 Å. Both Ca(1)-O(8) bond lengths are 2.43 Å. In the second Ca site, Ca(2) is bonded in a linear geometry to two equivalent O(6) atoms. Both Ca(2)-O(6) bond lengths are 2.29 Å. In the third Ca site, Ca(3) is bonded in a linear geometry to two equivalent O(12) atoms. Both Ca(3)-O(12) bond lengths are 2.29 Å. Eu(1) is bonded in a 9-coordinate geometry to one N(1), one N(2), one N(3), one O(1), one O(11), one O(3), one O(5), one O(7), and one O(9) atom. The Eu(1)-N(1) bond length is 2.54 Å. The Eu(1)-N(2) bond length is 2.53 Å. The Eu(1)-N(3) bond length is 2.56 Å. The Eu(1)-O(1) bond length is 2.47 Å. The Eu(1)-O(11) bond length is 2.47 Å. The Eu(1)-O(3) bond length is 2.44 Å. The Eu(1)-O(5) bond length is 2.45 Å. The Eu(1)-O(7) bond length is 2.43 Å. The Eu(1)-O(9) bond length is 2.48 Å. There are sixteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.51 Å. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(2) bond length is 1.24 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one N(1) atom. The C(2)-C(3) bond length is 1.37 Å. The C(2)-N(1) bond length is 1.34 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one H(1) atom. The C(3)-H(1) bond length is 0.93 Å. In the fourth C site, C(6) is bonded in a distorted single-bond geometry to one N(1) atom. The C(6)-N(1) bond length is 1.34 Å. In the fifth C site, C(7) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(7)-O(3) bond length is 1.28 Å. The C(7)-O(4) bond length is 1.23 Å. In the sixth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(9), one O(5), and one O(6) atom. The C(8)-C(9) bond length is 1.51 Å. The C(8)-O(5) bond length is 1.27 Å. The C(8)-O(6) bond length is 1.23 Å. In the seventh C site, C(9) is bonded in a distorted trigonal planar geometry to one C(10), one C(8), and one N(2) atom. The C(9)-C(10) bond length is 1.37 Å. The C(9)-N(2) bond length is 1.35 Å. In the eighth C site, C(10) is bonded in a distorted single-bond geometry to one C(9) and one H(4) atom. The C(10)-H(4) bond length is 0.93 Å. In the ninth C site, C(12) is bonded in a distorted single-bond geometry to one C(13) and one H(6) atom. The C(12)-C(13) bond length is 1.38 Å. The C(12)-H(6) bond length is 0.93 Å. In the tenth C site, C(13) is bonded in a distorted single-bond geometry to one C(12), one C(14), and one N(2) atom. The C(13)-C(14) bond length is 1.50 Å. The C(13)-N(2) bond length is 1.34 Å. In the eleventh C site, C(14) is bonded in a distorted bent 120 degrees geometry to one C(13), one O(7), and one O(8) atom. The C(14)-O(7) bond length is 1.27 Å. The C(14)-O(8) bond length is 1.24 Å. In the twelfth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one C(16), one O(10), and one O(9) atom. The C(15)-C(16) bond length is 1.49 Å. The C(15)-O(10) bond length is 1.25 Å. The C(15)-O(9) bond length is 1.27 Å. In the thirteenth C site, C(16) is bonded in a distorted trigonal planar geometry to one C(15), one C(17), and one N(3) atom. The C(16)-C(17) bond length is 1.38 Å. The C(16)-N(3) bond length is 1.35 Å. In the fourteenth C site, C(17) is bonded in a distorted single-bond geometry to one C(16) and one H(7) atom. The C(17)-H(7) bond length is 0.93 Å. In the fifteenth C site, C(20) is bonded in a distorted single-bond geometry to one N(3) atom. The C(20)-N(3) bond length is 1.33 Å. In the sixteenth C site, C(21) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(12) atom. The C(21)-O(11) bond length is 1.25 Å. The C(21)-O(12) bond length is 1.25 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Eu(1), one C(2), and one C(6) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Eu(1), one C(13), and one C(9) atom. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Eu(1), one C(16), and one C(20) atom. There are four 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(4) is bonded in a single-bond geometry to one C(10) atom. In the third H site, H(6) is bonded in a single-bond geometry to one C(12) atom. In the fourth H site, H(7) is bonded in a single-bond geometry to one C(17) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Eu(1) and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Eu(1) and one C(7) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Ca(1) and one C(7) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Eu(1) and one C(8) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Ca(2) and one C(8) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Eu(1) and one C(14) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Ca(1) and one C(14) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Eu(1) and one C(15) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one C(15) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Eu(1) and one C(21) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Ca(3) and one C(21) atom. Linkers: 12 [O]C(=O)c1cccc(C([O])=O)n1. Metal clusters: 6 [Ca] ,4 [Eu]. The MOF has largest included sphere 5.45 A, density 1.35 g/cm3, surface area 3884.18 m2/g, accessible volume 0.29 cm3/g