Editing Barium oxide (section)

==Preparation==
Barium oxide from metallic barium readily forms from its exothermic oxidation with [[dioxygen]] in air:

2 Ba(s) + O<sub>2</sub>(g) → 2 BaO(s).

It's most commonly made by heating [[barium carbonate]] at temperatures of 1000&ndash;1450 °C.

BaCO<sub>3</sub>(s) → BaO(s) + CO<sub>2</sub>(g)

Likewise, it is often formed through the thermal decomposition of other [[barium compounds|barium salts]],<ref>{{cite web  | title = Compounds of barium: barium (II) oxide  | work = Web Elements  | publisher = The University of Sheffield  | date = 2007-01-26  | url = http://www.webelements.com/webelements/compounds/text/Ba/Ba1O1-1304285.html  | access-date = 2007-02-22 }}</ref> like [[barium nitrate]].<ref>Pradyot Patnaik. ''Handbook of Inorganic Chemicals''. McGraw-Hill, 2002, {{ISBN|0-07-049439-8}}</ref>