Strontium
This metal resembles barium in its appearance and properties. The nitrate of strontia is principally in the composition of the well-known red-fire of the pyrotechnist. These metals occur abundantly as sulphate and carbonate, forming the vein-stone in many lead-mines. They are malleable, melt below a red heat, decompose water with evolution of hydrogen, and gradually oxidize in the air. See METALS.