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Anhydrous Phase B: Transmission Electron Microscope Characterization and Elastic Properties
Abstract : We have performed an extensive characterization by transmission electron microscopy (including precession electron diffraction tomography and ab initio electron diffraction refinement as
well as electron energy loss spectroscopy) of anhydrous phase B (Anh‐B) formed directly from olivine at 14 GPa, 1400 °C. We show that Anh‐B, which can be considered as a superstructure of olivine, exhibits strong topotactic relationships with it. This lowers the interfacial energy between the two phases and the energy barrier for nucleation of Anh‐B, which can form as a metastable phase. We have calculated the elastic and seismic properties of Anh‐B. From the elastic point of view, Anh‐B appears to be more isotropic than olivine. Anh‐B displays only a moderate seismic anisotropy quite similar to the one
of wadsleyite.
Littérature citée [56 références]
https://hal.univ-lille.fr/hal-02310376
Contributeur : Lilloa Université de Lille <>
Soumis le : jeudi 10 octobre 2019 - 10:13:13
Dernière modification le : mardi 24 novembre 2020 - 14:18:18
Contributeur : Lilloa Université de Lille <>
Soumis le : jeudi 10 octobre 2019 - 10:13:13
Dernière modification le : mardi 24 novembre 2020 - 14:18:18
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Addad-et-al(2019)Anh-B.pdf
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