term,name,definition,category,provenance,provenance_uri,note barium,Barium,"Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element. Its hydroxide, known in pre-modern times as baryta, does not occur as a mineral, but can be prepared by heating barium carbonate.",,Wikipedia,https://en.wikipedia.org/wiki/Barium,Added to support Critical Zone Observatory (CZO) data use cases.