title: Bis(2-amino-pyrimidin-1-ium) sulfate.
abstract: In the title compound, 2C(4)H(6)N(3) (+)·SO(4) (2-), the cations are each essentially planar with r.m.s. deviations of the fitted atoms of 0.008 and 0.002 Å. In the crystal, adjacent ions are linked by N-H⋯O, C-H⋯O and C-H⋯N hydrogen bonds, forming a three-dimensional network.
authors.affiliation: Department of Chemical and Material Engineering, Taoyuan Innovation Institute of Technology, Jhongli 32091,  Taiwan.
authors.forename: Hui-Ling
authors.initials: HL
authors.lastname: Hu
authors.forename: Chun-Wei
authors.initials: CW
authors.lastname: Yeh