Literature data on equilibria between solid calcium phosphates having the apatite structure and aqueous solutions containing Na+ and C 032ions were reexamined in view of the present data about the complexation of ions in such systems. Recalculations showed that all solutions were undersaturated or just saturated with respect to either brushite or octocalciumphosphate or more or less finely disp...

Experimental data were collected on the solubility equilibrium of the mineral of bone, tooth enamel and calcium phosphate renal stones. Evaluation in the form of potential diagrams of Ca(OH)2 versus H3PO4 shows that Ca/P ratios of 1, 4/3, 10/7, 3/2 and 5/3, related to phases like brushite, octocalcium phosphate, whitlockite, defective apatite and hydroxyapatite respectively can be important. Th...

s references are European Patent applications 50 lected from the group consisting of alkali metal phos0,264,353 and 0,264,354, both made by Shimamune and phates and ammonium phosphate; the solution having a Hosonuma. These disclosures teach a composite mateconcentration of phosphoric anions of 0.05 mole/L or rial and a process for the production thereof which more and a pH of from 4 to 7. Thus,...