Serghiou G, Zerr A, Boehler R
Max-Planck-Institut fur Chemie, Postfach 3060, 55020 Mainz, Germany.
Science. 1998 Jun 26;280(5372):2093-5. doi: 10.1126/science.280.5372.2093.
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.
