Progress in high pressure physics is reviewed with special emphasis on recent
developments in experimental techniques, pressure calibration, equations of state for simple …

Solid normal hydrogen was compressed in a diamond-anvil cell to pressures above 200
GPa. Spontaneous Raman spectra demonstrate that the solid undergoes a structural phase …

In an earlier paper [Phys. Rev. A 44, 5122 (1991)], we presented a Helmholtz-free-energy
model for nonideal mixtures of hydrogen atoms and molecules. In the present paper, we …

Hydrogen, the first element in the periodic table, is predicted to become metallic at extremely
high‐pressure conditions. Solid metallic hydrogen is believed to possess extraordinary …

Direct optical observations of solid hydrogen to pressures in the 250-gigapascal (2.5-
megabar) range at 77 K are reported. Hydrogen samples appear nearly opaque at the …

We develop a model for the Helmholtz free energy of fluid hydrogen at high density and high
temperature. This model aims at describing both pressure and temperature dissociation and …

Pressure-volume equations of state of solid normal hydrogen and deuterium are determined
from single-crystal x-ray diffraction measurements to maximum pressures of 26.5 GPa (265 …

The crystal structure and equation of state of solid hydrogen have been determined directly
to 26.5 gigapascals at room temperature by new synchrotron x-ray diffraction techniques …

We report calculations of the electronic charge density and the total energy of nitrogen as a
function of volume in both molecular and nonmolecular crystal structures, using the local …

Electrical conductivities were measured for liquid D 2 and H 2 shock compressed to
pressures of 10–20 GPa (100–200 kbar), molar volumes near 8 cm 3/mol, and calculated …