title: 2-(2H-Tetra-zol-5-yl)pyridinium nitrate.
abstract: In the cation of the title compound, C(6)H(6)N(5) (+)·NO(3) (-), the dihedral angle between the pyridinium and tetra-zole rings is 8.2 (2)°. The constituent ions of the compound are linked via N-H⋯O hydrogen bonds, forming helical chains running along the b axis. C-H⋯N and C-H⋯O hydrogen bonds are also observed.
authors.affiliation: Ordered Matter Science Research Center, College of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, People's Republic of China.
authors.forename: Li-Jing
authors.initials: LJ
authors.lastname: Cui
authors.forename: Miao-Jia
authors.initials: MJ
authors.lastname: Yu