Oxonium (dihydrogen 1-aminoethane-1,1-diyldiphosphonato-κ<sup>2</sup><i>N</i>,<i>O</i>)[hydrogen (1-amino-1-phosphonoethyl)phosphonato-κ<sup>2</sup><i>N</i>,<i>O</i>]palladium(II) trihydrate
Acta crystallographica. Section E