SCHEDULED MAINTENANCE
The F–-diffusion controlled transformation of calcite into fluorite was carried out in 1·0, 10–1, and 10–2M solutions of NaF at 25 °C. Activity diagrams have been constructed to show phase equilibria in the CaF2–CaCO3–H2O system at 25 °C under aqueous conditions. The value of ΔG0f(CaF2(c)) has been recalculated as –278·68 kcal mol–1.
E. J. Duff, J. Chem. Soc. A, 1971, 2779 DOI: 10.1039/J19710002779
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