On protons, iron and the high-pressure behavior of ringwoodite

Annette K. Kleppe, Andrew P. Jephcoat, Joseph R. Smyth, Daniel J. Frost

    Research output: Contribution to journalArticlepeer-review

    25 Citations (Scopus)


    Raman spectra of a single crystal of hydrous Fo89- ringwoodite have been measured in a diamond-anvil cell at room temperature to 60 GPa. Strong peaks corresponding to asymmetric and symmetric stretching vibrations of the SiO4 tetrahedra are observed at 796 and 841 cm-1 respectively. Additional bands occur in the range 709-939 and 100-250 cm-1. The SiO4 stretching modes of the spinel structure shift continuously up to 60 GPa. Near 40 GPa new Raman bands emerge in the region 550-680 cm-1 gaining intensity to the maximum pressure, a change that is reversible on pressure release. This pressure-induced modification in the structure appears to be related to structural complexity generated by both Fe and proton substitution.

    Original languageEnglish
    Pages (from-to)17-1-17-4
    JournalGeophysical Research Letters
    Issue number21
    Publication statusPublished - Nov 1 2002

    ASJC Scopus subject areas

    • Geophysics
    • Earth and Planetary Sciences(all)


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