The stability of (Mg, Fe) SiO3 perovskite in the deep lower mantle has long been uncertain.
Recently, a phase transition from perovskite to postperovskite was discovered through a …

In situ x-ray diffraction measurements of MgSiO3 were performed at high pressure and
temperature similar to the conditions at Earth's core-mantle boundary. Results demonstrate …

Archean passive margins. In When Did Plate Tectonics Begin on Planet Earth?(eds KC
Condie & V. Pease.), pp. 149–56. Geological Society of America Special Paper no. 440 …

The Earth's lower mantle is believed to be composed mainly of (Mg, Fe) SiO3 perovskite,
with lesser amounts of (Mg, Fe) O and CaSiO3 (ref.). But it has not been possible to explain …

Superionic conductors are compounds that exhibit exceptionally high values of ionic
conductivity within the solid state. Indeed, their conductivities often reach values of the order …

A new polymorph of MgSiO3 more stable than the Pbnm-perovskite phase has been
identified by first-principles computations. It has the CaIrO3 structure with Cmcm symmetry …

Raman spectra of Fe2O3 were measured to 62 GPa in a diamond anvil cell. All group
theoretically predicted Raman-active phonon modes were detected to 54 GPa. In addition …

According to the social intelligence hypothesis, social context represents an important force
driving the selection of animal cognitive abilities such as the capacity to estimate the nature …

Phase relations of a natural mantle composition were determined up to 126 GPa and 2450 K
by in‐situ x‐ray diffraction measurements in a laser‐heated diamond‐anvil cell (LHDAC) …

High-pressure synthesis is a powerful method for the preparation of novel materials with
high elastic moduli and hardness. Additionally, such materials may exhibit interesting …