catena-Poly[[tri­aqua­magnesium]-μ₂-malonato]

In the title compound, [Mg(C₃H₂O₄)(H₂O)₃]_n, the metal atom is in an octa­hedral environment. The octa­hedra are connected by malonate anions, forming chains along the c-axis direction. O—H...O hydrogen bonds link these chains into a three-dimensional network.