title: catena-Poly[[[diaqua-thulium(III)]-μ-6-carboxy-nicotinato-μ-pyridine-2,5-di-carboxyl-ato] dihydrate].
abstract: The title compound, {[Tm(C(7)H(3)NO(4))(C(7)H(4)NO(4))(H(2)O)(2)]·2H(2)O}(n), is isotypic with the analogous Tb(III) compound [Li et al. (2009 ▶). Acta Cryst. E65, m410]. All interatomic distances and angles and the hydrogen-bond geometries are very similar for the two structures. The refined Flack parameter of 0.49 (2) suggests inversion twinning.
authors.forename: Sheng
authors.initials: S
authors.lastname: Li
authors.forename: Yue
authors.initials: Y
authors.lastname: Chen
authors.forename: Hong-Mei
authors.initials: HM
authors.lastname: He
authors.forename: Yuan-Fang
authors.initials: YF
authors.lastname: Ma