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
Cobalt(II) nitrate dihydrate is a two-dimensional polymer, with nitrate bridges between Co(II) centres and hydrogen bonding holding the layers together. The tetrahydrate consists of discrete, octahedral [(HO)Co(NO)] molecules. The hexahydrate is better described as hexaaquacobalt(II) nitrate, [Co(OH)][NO], as it consists of discrete [Co(OH)] and [NO] ions. Above 55 °C, the hexahydrate converts to the trihydrate and at higher temperatures to the monohydrate. It is commonly reduced to metallic high purity cobalt. It can be absorbed on to various catalyst supports for use in Fischer-Tropsch catalysis. It is used in the preparation of dyes and inks. The hexahydrate is prepared treating metallic cobalt