Kinetics of solution crystal growth of strengite, FePO4,2H2O

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The iron(III) phosphate strengite, FePO4,2H2O, has been precipitated at 25 °C by mixing solutions of iron alum and ammonium phosphate. The rate of crystallization has been determined by pH recording. Three stages of crystal growth kinetics could be distinguished: (1) mononuclear growth, (2) polynuclear growth and, in a few cases, (3) spiral growth (BCF mechanism). From the first two, the value of edge free energy λ = 87 ± 1 pJ/m was found. The identity of the precipitate was verified by SEM, XRD and Mössbauer spectroscopy.

Original languageEnglish
JournalJournal of Crystal Growth
Pages (from-to)9-14
Number of pages6
Publication statusPublished - 2018

    Research areas

  • A1. Surface processes, A2. Growth from solutions, B1. Iron compounds, B1. Minerals, B1. Phosphates

ID: 220851111