Barium
Ba
atomic number
56
melting point
727°C

1. When exposed to the blowpipe flame, barium imparts a greenish-yellow color to the flame (unless it’s part of a silicate structure in which case it gives no positive flame test for barium); the flame color must be carefully distinguished from that of boron, MnCl2, and phosphorus.

2. Dissolve the powdered mineral sample in water or dilute HCl, then add a few drops of dilute H2SO4; a heavy white precipitate of BaSO4 will form.

3. Ignite the mineral sample, then touch it to some moistened turmeric paper; an alkaline reaction will be produced; (all alkaline earth metals and most alkali metals give an alkaline reaction after intense ignition).