title: Bis(ammonium) tris(hexaaquamagnesium) tetrakis(hydrogen phosphite).
abstract: The structure of the title compound, (NH4)2[Mg(H2O)6]3(HPO3)4, consists of [Mg(H2O)6]2+ and (NH4)+ cations and (HPO3)2- anions held together by an intricate network of hydrogen bonds involving all H atoms except for one linked directly to a P atom. The Mg2+ cations are octahedrally coordinated by six water molecules. One of the Mg atoms is located on a site with 2/m symmetry, whereas the other Mg atom and the P and N atoms occupy sites with m symmetry.
authors.affiliation: Laboratoire des Matériaux et Protection de l'Environnement, Faculté des Sciences Dhar El Mehraz, Fés, Morocco.
authors.forename: Khaoulani Idrissi
authors.initials: KI
authors.lastname: Abdallah
authors.forename: Saadi
authors.initials: S
authors.lastname: Mohamed
authors.forename: Rafiq
authors.initials: R
authors.lastname: Mohamed
authors.forename: Guelzim
authors.initials: G
authors.lastname: Abdelhalim