title: Bis(2-amino-4-methyl-6-oxo-3,6-di-hydro-pyrimidin-1-ium) sulfate monohydrate.
abstract: In the title hydrated mol-ecular salt, 2C5H8N3O(+)·SO4 (2-)·H2O, the components are linked by N-H⋯Os and Ow-H⋯Os (s = sulphate, w = water) hydrogen bonds, generating a layer by a+b+c and 2a-b translations. The cations are arranged nearly in parallel and show displaced π-π stacking centroid-centroid distance = 4.661 (2) Å between adjacent layers.
authors.affiliation: Laboratoire de Chimie des Matériaux, Faculté des Sciences de Bizerte, 7021 Zarzouna, Tunisia.
authors.forename: Sarra
authors.initials: S
authors.lastname: Soudani
authors.affiliation: Cristallographie, Résonance Magnétique et Modélisations (CRM2), UMR CNRS 7036, Institut Jean Barriol, Université de Lorraine, BP 70239, Bd des Aiguillettes, 54506 Vandoeuvre-les-Nancy, France.
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Wenger
authors.affiliation: Cristallographie, Résonance Magnétique et Modélisations (CRM2), UMR CNRS 7036, Institut Jean Barriol, Université de Lorraine, BP 70239, Bd des Aiguillettes, 54506 Vandoeuvre-les-Nancy, France.
authors.forename: Christian
authors.initials: C
authors.lastname: Jelsch
authors.affiliation: Laboratoire de Chimie des Matériaux, Faculté des sciences de Bizerte, 7021 Zarzouna, Tunisia.
authors.forename: Cherif
authors.initials: C
authors.lastname: Ben Nasr