in unsaturated stock solutions with various concentrations of calcium and phosphate and ph of 4-5 , supersaturation with respect to brushite , hydroxy- and fluorapatite , octacalcium phosphate and amorphous tricalcium phosphate was established at 20 degrees c by increasing ph in two series of portions , one containing low concentrations of fluoride , one fluoride-free .
C0006675
calcium
C0108136
tricalcium phosphate