Strontium carbonate a mineral, strontium carbonate is prepared synthetically in one of two manners. First of which is from naturally occurring celestine also known as strontium sulfate (SrSO) or by using soluble strontium salts by the reaction in solution with a soluble carbonate salt (usually sodium or ammonium carbonates). For example if sodium carbonate was used in solution with strontium nitrate: Sr(NO) + NaCO → SrCO + 2 NaNO . The most common use is as an inexpensive colorant in fireworks. Strontium and its salts emit a brilliant red color in flame. Unlike other strontium salts, the carbonate salt is generally preferred
Rubidium nitrate for manufacture of catalysts and in scintillation counters. It is rarely used in fireworks to produce a red-violet colour. RbNO can be prepared either by dissolving rubidium metal, its hydroxide or carbonate in nitric acid. Rubidium nitrate Rubidium nitrate is an inorganic compound with the formula RbNO. This alkali metal nitrate salt is white and highly soluble in water. Rubidium nitrate is a white crystalline powder that is highly soluble in water and very slightly soluble in acetone. In a flame test, RbNO gives a mauve/light purple colour. Rubidium compounds have very few applications. Like caesium nitrate, it is used