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  • Title: (Mg,Fe)SiO3-perovskite stability under lower mantle conditions.
    Author: Serghiou G, Zerr A, Boehler R.
    Journal: Science; 1998 Jun 26; 280(5372):2093-5. PubMed ID: 9641909.
    Abstract:
    In three different experiments up to 100 gigapascals and 3000 kelvin, (Mg,Fe)SiO3-perovskite, the major component of the lower mantle, remained stable and did not decompose to its component oxides (Mg, Fe)O and SiO2. Perovskite was formed from these oxides when heated in a diamond anvil cell at pressures up to 100 gigapascals. Both MgSiO3 crystals and glasses heated to 3000 kelvin at 75 gigapascals also formed perovskite as a single phase, as evident from Raman spectra. Moreover, fluorescence measurements on chromium-doped samples synthesized at these conditions gave no indication of the presence of MgO.
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