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Phase transition in mayenite Ca12Al14O33

  • A. S. Tolkacheva*
  • , S. N. Shkerin
  • , I. V. Korzun
  • , S. V. Plaksin
  • , V. R. Khrustov
  • , D. P. Ordinartsev
  • *Corresponding author for this work
  • Institute of High Temperature Electrochemistry UB RAS
  • Institute of Electrophysics of the Ural Division of the Russian Academy of Sciences

Research output: Contribution to journalArticlepeer-review

Abstract

A phase transition in Ca12Al14O33 has been discovered and investigated by thermogravimetric analysis, differential scanning calorimetry, dilatometry, and high-temperature X-ray diffraction. The phase transition occurs at 922 ± 45 K (δH =-406 ± 13 kJ/mol, δS =-440 ± 14 J/(mol K)) and is presumably a first-order one. It does not change the symmetry of the cationic subsystem. The phase transition is difficult to reveal because the material changes its mass, probably by releasing water bound in several different ways.

Original languageEnglish
Pages (from-to)1014-1018
Number of pages5
JournalRussian Journal of Inorganic Chemistry
Volume57
Issue number7
DOIs
StatePublished - Jul 2012
Externally publishedYes

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