title: catena-Poly[[{bis-[tetra-aqua-(2-hy-droxy-3,4-dioxocyclo-but-1-en-1-olato-κO)bariumstrontium(0.35/0.65)]di-μ-aqua}-bis-(μ-2-hy-droxy-4-oxocyclo-but-1-ene-1,3-diolato-κO:O)] monohydrate].
abstract: The title structure, {[Ba(0.71)Sr(1.29)(C(4)HO(4))(4)(H(2)O)(10)]·H(2)O}(n), is built from dimers of edge-sharing monocapped square anti-prisms [(Ba/Sr)O(3)(H(2)O)(6)], in which barium and strontium are statistically disordered [ratio 0.353 (8):0.647 (8)] on the same crystallographic site. Such dimers are connected via bidentate hydrogen squarate groups [HC(4)O(4)](-), leading to chains that propagate along the b axis. Inter- and intra-molecular O-H⋯O hydrogen bonds maintain the crystal packing through a three-dimensional network.
authors.forename: Chahrazed
authors.initials: C
authors.lastname: Trifa
authors.forename: Amira
authors.initials: A
authors.lastname: Bouhali
authors.forename: Sofiane
authors.initials: S
authors.lastname: Bouacida
authors.forename: Chaouki
authors.initials: C
authors.lastname: Boudaren
authors.forename: Thierry
authors.initials: T
authors.lastname: Bataille