The molar enthalpy of dehydration of cordierite

J. W. Carey, A. Navrotsky

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


The molar enthalpy of dehydration of hydrous cordierite (Mg2Al4Si5O18.nH2O) was determined by transposed temperature drop calorimetry and is a linear function of H2O content indicating an ideal enthalpy of mixing for H2O in cordierite. The molar enthalpy of dehydration is 41.8 ± 1.6 kJ/mol at the reference conditions 25°C, 1 bar, and gaseous H2O. This value is the same as the molar enthalpy of vaporization for water (40.9 kJ/mol) within experimental uncertainty and is considerably less than that found for the dehydration of zeolites (61-84 kJ/mol). -from Authors

Original languageEnglish (US)
Pages (from-to)930-936
Number of pages7
JournalAmerican Mineralogist
Issue number9-10
StatePublished - 1992
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology


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