A Second Polymorph of 2-Aminopyridinium Dihydrogenphosphate

Abstract

In the title compound, β-C<inf>5</inf>H<inf>7</inf> +·H<inf>2</inf>PO<inf>4</inf>-, the tetrahedral dihydrogenphosphate moieties are linked into double chains by O-H⋯O hydrogen bonds, and the organic species crosslink the chains into sheets by way of N-H⋯O bonds. The resulting structure is quite different from that of the previously described a polymorph of this stoichiometry [Czapla, Dacko & Waskowska (2003). J. Phys. Condens. Matter, 15, 3793-3803]. © 2005 International Union of Crystallography.