Poly[µ(3)-ß-alanine-aqua-µ(4)-sulfato-dilithium].

The title compound, [Li(2)(SO(4))(C(3)H(7)NO(2))(H(2)O)](n), is a coordination polymer in which the ß-alanine residues remain in the zwitterionic form. The crystal structure consists of corrugated sheets of [LiO(4)] and [SO(4)] tetra-hedra parallel to (010) with the ß-alanine mol-ecules located between the sheets. The two independent Li(+) cations are four-coordinated by O atoms in a distorted tetra-hedral geometry. The crystal structure is formed by stacking of alternate organic and inorganic layers along the a axis. The crystal structure is further stabilized by N-H⋯O hydrogen bonds.