 Because of its status as a weak Lewis base, strontium carbonate can be used to produce many different strontium compounds by simple use of the corresponding acid.The cyanobacteria "Calothrix", "Synechococcus" and "Gloeocapsa" can precipitate strontian calcite in groundwater.The strontium exists as strontianite in solid solution within the host calcite with the strontium content of up to one percent.