title: Bis(5-amino-3-carb-oxy-1H-1,2,4-triazol-4-ium) sulfate dihydrate.
abstract: The crystal structure of the title compound, 2C(3)H(5)N(4)O(2) (+)·SO(4) (2-)·2H(2)O, displays a three-dimensional framework in which mixed infinite chains [oriented parallel to (510) and ([Formula: see text]10)] inter-fere, forming tunnels extending parallel to the c axis. Inter-molecular O-H⋯O, N-H⋯O and O-H⋯N hydrogen bonds ensure the unity of the structure and generate centrosymmetric R(4) (4)(14) and R(4) (2)(8) rings. The S atom lies on a twofold axis.
authors.forename: Amira
authors.initials: A
authors.lastname: Ouakkaf
authors.forename: Fadila
authors.initials: F
authors.lastname: Berrah
authors.forename: Sofiane
authors.initials: S
authors.lastname: Bouacida
authors.forename: Thierry
authors.initials: T
authors.lastname: Roisnel