Phase relationships in the join Ca(OH)2–CaCO3–Ca3(PO4)2–H2O at 1000 bars
- 1 March 1969
- journal article
- Published by Mineralogical Society in Mineralogical Magazine
- Vol. 37 (285) , 75-82
- https://doi.org/10.1180/minmag.1969.037.285.08
Abstract
Phase equilibria involving calcite, apatite, portlandite, liquid, and vapour were determined at 1000 bars. Calcite, apatite, and portlandite melt at 654 °C to form a liquid of composition (wt %), Ca(OH)2 53 %, CaCO3 46 %, Ca3(PO4)2 1 %. With water present melting occurs at 635 °C to form a similar liquid with a low water content. The X-ray diffraction patterns of the equilibrium apatites were not significantly different from synthetic hydroxyapatite.Keywords
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