ErC14H7(NO3)2(CH)4 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of eight 02329_fluka molecules and one ErC14H7(NO3)2 cluster. In the ErC14H7(NO3)2 cluster, Er(1) is bonded in a 8-coordinate geometry to one N(1), one N(2), one O(1), one O(2), one O(3), one O(6), and two equivalent O(5) atoms. The Er(1)-N(1) bond length is 2.55 Å. The Er(1)-N(2) bond length is 2.49 Å. The Er(1)-O(1) bond length is 2.28 Å. The Er(1)-O(2) bond length is 2.29 Å. The Er(1)-O(3) bond length is 2.17 Å. The Er(1)-O(6) bond length is 2.41 Å. There is one shorter (2.30 Å) and one longer (2.56 Å) Er(1)-O(5) bond length. There are fourteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(1) atom. The C(1)-N(1) bond length is 1.33 Å. The C(1)-H(1) bond length is 1.09 Å. In the second C site, C(3) is bonded in a distorted single-bond geometry to one C(4) and one H(3) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-H(3) bond length is 1.09 Å. In the third C site, C(4) is bonded in a trigonal planar geometry to one C(12), one C(3), and one C(5) atom. The C(4)-C(12) bond length is 1.43 Å. The C(4)-C(5) bond length is 1.43 Å. In the fourth C site, C(5) is bonded in a distorted single-bond geometry to one C(4) and one H(4) atom. The C(5)-H(4) bond length is 1.09 Å. In the fifth C site, C(6) is bonded in a distorted single-bond geometry to one C(7) and one H(5) atom. The C(6)-C(7) bond length is 1.43 Å. The C(6)-H(5) bond length is 1.09 Å. In the sixth C site, C(7) is bonded in a trigonal planar geometry to one C(11), one C(6), and one C(8) atom. The C(7)-C(11) bond length is 1.42 Å. The C(7)-C(8) bond length is 1.41 Å. In the seventh C site, C(8) is bonded in a distorted single-bond geometry to one C(7), one C(9), and one H(6) atom. The C(8)-C(9) bond length is 1.38 Å. The C(8)-H(6) bond length is 1.09 Å. In the eighth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(10), one C(8), and one H(7) atom. The C(9)-C(10) bond length is 1.41 Å. The C(9)-H(7) bond length is 1.09 Å. In the ninth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(9), one N(2), and one H(8) atom. The C(10)-N(2) bond length is 1.33 Å. The C(10)-H(8) bond length is 1.09 Å. In the tenth C site, C(11) is bonded in a distorted trigonal planar geometry to one C(12), one C(7), and one N(2) atom. The C(11)-C(12) bond length is 1.44 Å. The C(11)-N(2) bond length is 1.36 Å. In the eleventh C site, C(12) is bonded in a distorted trigonal planar geometry to one C(11), one C(4), and one N(1) atom. The C(12)-N(1) bond length is 1.36 Å. In the twelfth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(13)-O(1) bond length is 1.28 Å. The C(13)-O(2) bond length is 1.28 Å. In the thirteenth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(16)-O(3) bond length is 1.31 Å. The C(16)-O(4) bond length is 1.24 Å. In the fourteenth C site, C(17) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(17)-O(5) bond length is 1.28 Å. The C(17)-O(6) bond length is 1.27 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Er(1), one C(1), and one C(12) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Er(1), one C(10), and one C(11) atom. There are seven inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(8) atom. In the sixth H site, H(7) is bonded in a single-bond geometry to one C(9) atom. In the seventh H site, H(8) is bonded in a single-bond geometry to one C(10) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Er(1) and one C(13) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Er(1) and one C(13) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Er(1) and one C(16) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one C(16) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one C(17) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Er(1) and one C(17) atom. Linkers: 3 [O]C(=O)/C=C/C([O])=O. Metal clusters: 1 O=[C]O[Er]123O[C]O[Er](O[C]=O)(O[C]O1)(O[C]O2)O[C]O3. RCSR code: sql. The MOF has largest included sphere 2.36 A, density 2.10 g/cm3, surface area 3250.68 m2/g, accessible volume 0.09 cm3/g