Abstract
On dynamic calcination of synthetic apatites in air-SO2 flow up to 750-900 °C formation of CaSO4 and Ca2P2O7, and at 800-950 °C, a reaction between them with the formation ofβ-Ca3(PO4)2 and partial evolvement of SO2 takes place. The amount of SO2 bound and evolved depends on the composition of the apatite.
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