Abstract:It was studies that the algal cells accumulate phosphate in with environment and it is related to the formation of phosphorites. The test results showed that the cells of Spirulina subsalsa could absorbe phoshate quickly in environment with rich phosphorus during the logarithmic growth phase and could synthetize a large amount of the polyphosphate in cells. The simulated test of mineralization showed that under the normal atmospheric temperature and pressure and in the Ca2+-HPO2-4-HCO3--F--H2O system, the polyphosphate extracted from algal cells of Spirulina subaslsa may form mineral deposits. It contains mainly carbonate fluorapatite, caloite and non-crystal phosphorus. These results provided a new important evidence for the theory of biological mineralization.