Thermochemistry of Hf-zirconolite, CaHfTi2O7

Robert L. Putnam, Alexandra Navrotsky, Brian F. Woodfield, Jennifer L. Shapiro, Rebecca Stevens, Juliana Boerio-Goates

Research output: Contribution to journalConference articlepeer-review

11 Scopus citations

Abstract

The formation enthalpy, -3752.3±4.7 kJ·mol-1, of Hf-zirconolite, CaHfTi2O7, was obtained using high temperature oxide-melt solution calorimetry. Combined with heat capacity data obtained using low temperature adiabatic calorimetry we report the heat capacity (Cp) and the standard molar formation energetics (ΔH°f, elements, ΔS°T, and ΔG°f, elements) for Hf-zirconolite from T = 298.15 K to T = 1500 K. Comparison of Hf-zirconolite with Zr-zirconolite is made.

Original languageEnglish (US)
Pages (from-to)11-18
Number of pages8
JournalMaterials Research Society Symposium - Proceedings
Volume556
DOIs
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1998 MRS Fall Meeting - Symposium 'Scientific Basis for Nuclear Waste Management XXII' - Boston, MA, USA
Duration: Nov 30 1998Dec 4 1998

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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