Calculation of subsolidus phase relations in carbonates and pyroxenes

Alexandra Navrotsky; Douglas Loucks

doi:10.1007/BF00307983

Calculation of subsolidus phase relations in carbonates and pyroxenes

Alexandra Navrotsky, Douglas Loucks

Molecular Sciences, School of (SMS)

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

31 Scopus citations

Abstract

This formulation of the free energy of mixing in a binary system takes as parameters a Bragg-Williams type cooperative disordering energy and the difference in free energy between different structures for the end-members. Subsolidus phase relations in carbonate systems such as CaCO₃-MgCO₃ and CdCO₃-MgCO₃ are calculated. Similar equations also reproduce the topologies of subsolidus phase relations in pyroxenes, including orthopyroxene-clinopyroxene phase boundaries in the enstatitediopside and ferrosilite-hedenbergite systems, the pigeonite-augite solvus, and the stability field of iron-free pigeonite.

Original language	English (US)
Pages (from-to)	109-127
Number of pages	19
Journal	Physics and Chemistry of Minerals
Volume	1
Issue number	1
DOIs	https://doi.org/10.1007/BF00307983
State	Published - Mar 1977

ASJC Scopus subject areas

General Materials Science
Geochemistry and Petrology

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abstract = "This formulation of the free energy of mixing in a binary system takes as parameters a Bragg-Williams type cooperative disordering energy and the difference in free energy between different structures for the end-members. Subsolidus phase relations in carbonate systems such as CaCO3-MgCO3 and CdCO3-MgCO3 are calculated. Similar equations also reproduce the topologies of subsolidus phase relations in pyroxenes, including orthopyroxene-clinopyroxene phase boundaries in the enstatitediopside and ferrosilite-hedenbergite systems, the pigeonite-augite solvus, and the stability field of iron-free pigeonite.",

author = "Alexandra Navrotsky and Douglas Loucks",

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AU - Loucks, Douglas

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AB - This formulation of the free energy of mixing in a binary system takes as parameters a Bragg-Williams type cooperative disordering energy and the difference in free energy between different structures for the end-members. Subsolidus phase relations in carbonate systems such as CaCO3-MgCO3 and CdCO3-MgCO3 are calculated. Similar equations also reproduce the topologies of subsolidus phase relations in pyroxenes, including orthopyroxene-clinopyroxene phase boundaries in the enstatitediopside and ferrosilite-hedenbergite systems, the pigeonite-augite solvus, and the stability field of iron-free pigeonite.

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Calculation of subsolidus phase relations in carbonates and pyroxenes

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