When you just want a red/purple flame, you could make SrCl2 with excess SrCO3 with HCl. Filter the excess SrCO3 and add a solution of KNO3. Now you
can boil down to a volume where mostly KCl crystalizes. The strontium nitrate will have a KCl contamination, but potassium is moderately purple, which
in combination with strontium might not be too much of a problem. The chloride might help with the flame coloring of strontium, but I never understood
how that works exactly.
Don't know how a mixture of barium and potassium would behave.
[Edited on 8-1-2022 by Tsjerk] |