A Raman study of cation-disorder transition temperature of natural MgAl2O4 spinel

Nguyen Van Minh, In Sang Yang

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We have measured Raman spectra of samples of natural MgAl2O 4 spinel before and after annealing at different temperatures and quenching. The appearance of 727cm-1 mode in the samples annealed at 800°C or higher is believed to be due to the cation-disorder of spinel. The full-width-at-the-half-maximum (FWHM) values of the 410cm-1 mode as a function of the annealing temperature clearly shows an abrupt increase at the temperature between 700 and 750°C as the annealing temperature increases. Thus, we find the annealing temperature at which the cation-disorder occurred in the natural MgAl2O4 spinel to be between 700 and 750°C.

Original languageEnglish
Pages (from-to)93-96
Number of pages4
JournalVibrational Spectroscopy
Issue number1-2
StatePublished - 17 Jun 2004
EventThe 2nd International Conference on Advanced Vibrational Spectroscopy - Nottingham, United Kingdom
Duration: 24 Aug 200329 Aug 2003

Bibliographical note

Funding Information:
We wish to thank Luc Huy Hoang and Nguyen The Khoi for their X-ray diffraction measurements. We thank Korea Research Foundation Grant KRF-2000-015-DS0014 for financial support.


  • Cation-disorder
  • MgAlO
  • Raman study


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