The compounds barium tetrazolate (6). ban urn 5-ammotettazolate tetrahydiate (7). barium 5-nitriminotetrazolate dihydrate (8), barium bis(1H-5-nitriminotetrazolate) tetrahydrate (9). barium 1-methy1-5-mtrimmotetrazolate monohydrate (10). and barium 2-methyl-5-nitriminotetrazolate dihydrate (11) were synthesized by the reactions of barium hydroxide octahydrate and 1H-tetrazole (1). 5-aminotetrazole (2). 1.4H-5-nitriminotetrazole (3). 1-methyl-5-nitriminotetrazole (4), and 2-methyl-5-nitriminotetrazole (5). respectively The compounds were characterized using multi-nuclear NMR spectroscopy. vibrational (IR and Raman) spectroscopy. elemental analysis. and differential scanning calorimetry The solid-state structures of 7-11 weft. (determined using low temperature X-ray diffraction and a comprehensive characterization is given In addition, the sensitivities (impact. fiction. electrical discharge) of 6-11 were investigated and bomb calorimetric measurements were carried out.