Stability relations of apatites and calcium carbonates

Yaacov Nathan; Eytan Sass

doi:10.1016/0009-2541(81)90075-9

Stability relations of apatites and calcium carbonates

Yaacov Nathan^*, Eytan Sass

^*Corresponding author for this work

Fredy & Nadine Herrmann Institute of Earth Sciences

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

A new, more general thermodynamic approach to the stability relations between apatites and calcium carbonates is presented. It is shown that at equilibrium, it is possible to express total inorganic carbon (C_t) as a function of pH and total inorganic phosphorus (P_t) only, this for a given salinity, temperature and F concentration. Substituting the appropriate constants, it is shown that, in general, lowering the pH increases the field of apatite stability and decreases the field of CaCO₃ stability.

Original language	English
Pages (from-to)	103-111
Number of pages	9
Journal	Chemical Geology
Volume	34
Issue number	1-2
DOIs	https://doi.org/10.1016/0009-2541(81)90075-9
State	Published - Nov 1981

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10.1016/0009-2541(81)90075-9

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title = "Stability relations of apatites and calcium carbonates",

abstract = "A new, more general thermodynamic approach to the stability relations between apatites and calcium carbonates is presented. It is shown that at equilibrium, it is possible to express total inorganic carbon (Ct) as a function of pH and total inorganic phosphorus (Pt) only, this for a given salinity, temperature and F concentration. Substituting the appropriate constants, it is shown that, in general, lowering the pH increases the field of apatite stability and decreases the field of CaCO3 stability.",

author = "Yaacov Nathan and Eytan Sass",

year = "1981",

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AU - Sass, Eytan

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N2 - A new, more general thermodynamic approach to the stability relations between apatites and calcium carbonates is presented. It is shown that at equilibrium, it is possible to express total inorganic carbon (Ct) as a function of pH and total inorganic phosphorus (Pt) only, this for a given salinity, temperature and F concentration. Substituting the appropriate constants, it is shown that, in general, lowering the pH increases the field of apatite stability and decreases the field of CaCO3 stability.

AB - A new, more general thermodynamic approach to the stability relations between apatites and calcium carbonates is presented. It is shown that at equilibrium, it is possible to express total inorganic carbon (Ct) as a function of pH and total inorganic phosphorus (Pt) only, this for a given salinity, temperature and F concentration. Substituting the appropriate constants, it is shown that, in general, lowering the pH increases the field of apatite stability and decreases the field of CaCO3 stability.

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Stability relations of apatites and calcium carbonates

Abstract

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