Simulataneous application of charge coupled device array-detected Raman spectroscopy and differential scanning calorimetry to in situ investigation of phase transitions in condensed matter

Mauno E.E. Harju, Jussi Valkonen, Upali A. Jayasooriya, Daniel Wolverson

Research output: Contribution to journalArticle


The combination of differential scanning calorimetry (DSC) with charge coupled device (CCD) array-detected Raman spectroscopy for the in situ investigation of phase transition is illustrated using ammonium nitrate as an example. This method aids unambiguous characterization of different phases by providing a simultaneous probe of thermodynamic and vibrational data. The availability of real-time vibrational data, including both the internal and external mode regions, is unique to array-detected Raman spectroscopy. The intensity changes of the symmetric stretching mode ν1 of the nitrate ions and the lattice vibrations, that accompany the phase transition IV → II of ammonium nitrate, are rationalized in terms of the known crystal structure data.

Original languageEnglish
Pages (from-to)2717-2720
Number of pages4
JournalJournal of the Chemical Society, Faraday Transactions
Issue number18
Publication statusPublished - 1 Dec 1992

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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