Barium peroxide Barium peroxide Barium peroxide is the inorganic compound with the formula BaO. This white solid (gray when impure) is one of the most common inorganic peroxides, and it was the first peroxide compound discovered. Being an oxidizer and giving a vivid green colour upon ignition (as do all barium compounds), it finds some use in fireworks; historically, it was also used as a precursor for hydrogen peroxide. Barium peroxide is a peroxide, containing subunits. The solid is isomorphous to calcium carbide, CaC. Barium peroxide arises by the reversible reaction of O with barium oxide. The peroxide forms around 500 °C
Isotopes of barium exceptions are Ba, which has a half-life of 10.51 years, Ba (11.5 days), and Ba (2.55 minutes), which is the decay product of Cs (30.17 years, and a common fission product). Barium-114 is predicted to undergo cluster decay, emitting a nucleus of stable C to produce Sn. However this decay is not yet observed; the upper limit on the branching ratio of such decay is 0.0034%. Isotopes of barium Naturally occurring barium (Ba) is a mix of six stable isotopes and one very long-lived radioactive primordial isotope, barium-130, recently identified as being unstable by geochemical means (from analysis of the