Barium, one of the highly reactive alkali metals, is a gummy purplish metal that forms a black oxide within seconds of being exposed to air. ACI Alloys can supply pure barium sputter targets and evaporation pieces packed in argon, although the material is best packed in oil to prevent oxidation.
Barium alloys may be stable in air. See Barium in our “materials made” page for an idea of our capabilities–also try searching alphabetically on each of the element symbols in the material you are looking for.
The MSDS for barium can be found here.
ACI Alloys: “When it comes to competitors, we barium”