The composition and state of Earth's core, located deeper than 2,900 km from the surface,
remain largely uncertain. Recent static experiments on iron and alloys performed up to inner …

This paper provides the state-of-the-art discussion of major aspects of the composition and
evolution of the Earth's core. A comparison of experimentally-derived density of Fe with …

The lanthanum-hydrogen system has attracted significant attention following the report of
superconductivity in LaH10 at near-ambient temperatures and high pressures. Phases other …

Ultralow-velocity zones (ULVZs) at Earth's core–mantle boundary region have important
implications for the chemical composition and thermal structure of our planet, but their origin …

The Fe-H system has been investigated by combined x-ray diffraction studies and total
energy calculations at pressures up to 136 GPa. The experiments involve laser annealing of …

Hydrous minerals in subducted crust can transport large amounts of water into Earth's deep
mantle. Our laboratory experiments revealed the surprising pressure-induced chemistry that …

We explore the partitioning behavior of hydrogen between coexisting metal and silicate
melts at conditions of the magma ocean and the current core–mantle boundary with the help …

Hydrogen is likely one of the light elements in the Earth's core. Despite its importance, no
direct observation has been made of hydrogen in an iron lattice at high pressure. We made …

Hydrogen, the most abundant element in the universe, has likely been incorporated into
Earth's core due to its tendency to dissolve in iron at high pressure. Using machine-learning …

Hydrogen composition and occupation state provide basic information for understanding
various properties of the metal–hydrogen system, ranging from microscopic properties such …