Probing crystallisation of a fluoro-apatite - mullite system using neutron diffraction

J.M. Smith, R.A. Martin*, D.T. Bowron, A.C. Hannon, R.J. Newport

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Real-time small angle neutron scattering and wide angle neutron scattering studies were undertaken concurrently on a glass ionomer of nominal composition 4.5(SiO2)-3(Al2O3)-1.5(P2O5)-3(CaO)-2(CaF2). Neutron studies were conducted as a function of temperature to investigate the crystallisation process. No amorphous phase separation was observed at room temperature and the onset of crystallisation was found to occur at 650°C, which is 90°C lower than previously reported. The first crystalline phase observed corresponded to fluorapatite; it was only upon further heating was the mullite phase became present. The crystallite size at 650°C was found to be ~115Å and the result was consistent across all measurements.

Original languageEnglish
Pages (from-to)84–88
Number of pages5
JournalJournal of Non-Crystalline Solids
Early online date25 May 2016
Publication statusPublished - 1 Nov 2016

Bibliographical note

© 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

Funding: EPSRC (EP/F021011).


  • apatite
  • crystallisation
  • mullite


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