Poly[[diaquabis(μ<sub>3</sub>-isonicotinato-κ<sup>3</sup><i>N</i>:<i>O</i>:<i>O</i>′)bis(μ<sub>2</sub>-isonicotinato-κ<sup>2</sup><i>N</i>:<i>O</i>)gadolinium(III)disiliver(I)] nitrate monohydrate]
Acta crystallographica. Section E