Crystal structure of an unknown solvate of dodecakis(μ<sub>2</sub>-alaninato-1:2κ<sup>2</sup><i>O</i>:<i>N</i>,<i>O</i>)cerium(III)hexanickel(II) aquatris(hydroxido-κ<i>O</i>)tris(nitrato-κ<sup>2</sup><i>O</i>,<i>O</i>′)cerate(III)
Acta crystallographica. Section E, Crystallographic communications