Crystal structure of a heterometallic coordination polymer: catena-poly[[[tetra­aqua­cobalt(II)]-μ-pyridine-2,6-di­carboxyl­ato-calcium(II)-μ-pyridine-2,6-di­carboxyl­ato] dihydrate].

Crystal structure of a heterometallic coordination polymer: catena-poly[[[tetra­aqua­cobalt(II)]-μ-pyridine-2,6-di­carboxyl­ato-calcium(II)-μ-pyridine-2,6-di­carboxyl­ato] dihydrate].