Bis(1,4-diamino-1,2,4-triazolium) sulfate (1) was obtained from the corresponding chloride by ion metathesis using Ag 2 SO 4 . Further metathesis with barium 5,5 1 -azotetrazolate yielded bis(1,4-diamino-1,2,4-triazolium) 5,5 1 -azotetrazolate (2). Numerous NH¨¨¨N and NH¨¨¨O interactions were identified in the crystal structures of 1 and 2. Both compounds undergo exothermal decomposition upon heating.