Activity-composition relation of jadeite in omphacite pyroxene: Theoretical deductions

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Theoretical considerations suggest that the activity coefficient of jadeite in natural multicomponent omphacite pyroxene can be approximated by an expression of the form RT ln γjd {reversed tilde equals} W12 (XDi + XHed) (I - XJd), where W12 is an adjustable interchange parameter in the jadeite-diopside join, and X stands for the mole fraction of the specified component in the pyroxene solid solution. Synthesis of the available experimental and observational data yields W12 {reversed tilde equals} - 1400 (± 1400) + 1.16 (± 1.16) cal/mole, suggesting a nearly ideal solution around 1100°C, and negative departure from ideality at low temperature of the jadeite-diopside solid solution.

Original languageEnglish (US)
Pages (from-to)145-153
Number of pages9
JournalEarth and Planetary Science Letters
Volume19
Issue number2
DOIs
StatePublished - 1973
Externally publishedYes

Fingerprint

jadeite
omphacite
deduction
pyroxene
solid solutions
diopside
solid solution
Solid solutions
Chemical analysis
activity coefficient
Activity coefficients
Interchanges
coefficients
synthesis
W 12
Temperature

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Geochemistry and Petrology
  • Geophysics

Cite this

Activity-composition relation of jadeite in omphacite pyroxene : Theoretical deductions. / Ganguly, Jibamitra.

In: Earth and Planetary Science Letters, Vol. 19, No. 2, 1973, p. 145-153.

Research output: Contribution to journalArticle

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