The finding that an unusual iron oxide forms at extremely high pressures suggests that hydrogen and oxygen — two elements that strongly influence Earth's evolution — are generated in the mantle. See Letter p.241
Nature 534 183 doi: 10.1038/534183a
Tag Archives: hydrogen
Quantum hydrogen-bond symmetrization in the superconducting hydrogen sulfide system
The quantum nature of the proton can crucially affect the structural and physical properties of hydrogen compounds. For example, in the high-pressure phases of H2O, quantum proton fluctuations lead to symmetrization of the hydrogen bond and reduce the boundary between asymmetric and symmetric structures in the phase diagram by 30 gigapascals (ref. 3). Here we show that an analogous quantum symmetrization occurs in the recently...
Quantum hydrogen-bond symmetrization in the superconducting hydrogen sulfide system
The quantum nature of the proton can crucially affect the structural and physical properties of hydrogen compounds. For example, in the high-pressure phases of H2O, quantum proton fluctuations lead to symmetrization of the hydrogen bond and reduce the boundary between asymmetric and symmetric structures in the phase diagram by 30 gigapascals (ref. 3). Here we show that an analogous quantum symmetrization occurs in the recently...
Lunar true polar wander inferred from polar hydrogen
The earliest dynamic and thermal history of the Moon is not well understood. The hydrogen content of deposits near the lunar poles may yield insight into this history, because these deposits (which are probably composed of water ice) survive only if they remain in permanent shadow. If the orientation of the Moon has changed, then the locations of the shadowed regions will also have...
Cosmology: Photons from dwarf galaxy zap hydrogen
The detection of photons sufficiently energetic to ionize neutral hydrogen, coming from a compact, star-forming galaxy, offers clues to how the first generation of galaxies may have reionized hydrogen gas in the early Universe. See Letter p.178
Nature 529 159 doi: 10.1038/529159a
Cosmology: Photons from dwarf galaxy zap hydrogen
The detection of photons sufficiently energetic to ionize neutral hydrogen, coming from a compact, star-forming galaxy, offers clues to how the first generation of galaxies may have reionized hydrogen gas in the early Universe. See Letter p.178
Nature 529 159 doi: 10.1038/529159a
Evidence for a new phase of dense hydrogen above 325 gigapascals
Almost 80 years ago it was predicted that, under sufficient compression, the H–H bond in molecular hydrogen (H2) would break, forming a new, atomic, metallic, solid state of hydrogen. Reaching this predicted state experimentally has been one of the principal goals in high-pressure research for the past 30 years. Here, using in situ high-pressure Raman spectroscopy, we present evidence that at pressures greater than...
Evidence for a new phase of dense hydrogen above 325 gigapascals
Almost 80 years ago it was predicted that, under sufficient compression, the H–H bond in molecular hydrogen (H2) would break, forming a new, atomic, metallic, solid state of hydrogen. Reaching this predicted state experimentally has been one of the principal goals in high-pressure research for the past 30 years. Here, using in situ high-pressure Raman spectroscopy, we present evidence that at pressures greater than...
New study hints that we’re closing in on metallic hydrogen
Raman spectroscopy and a diamond anvil were used to identify and characterize a new phase of hydrogen. (credit: Philip Dalladay-Simpson and Eugene Gregoryanz)
We tend to think of the properties of the chemical elements as immutable—a metal is a metal, and a gas is a gas. But all those properties are what we experience on Earth. The...