Physical Review Letters · 1982 · 82 citations · 14 references
K IsothermsEngineeringChemistrySpectroscopic PropertyMolecular HydrogenThermodynamicsMetallic Atomic StateDiamond-anvil CellPhysicsAtomic PhysicsLow-temperature EquationPhysical ChemistryMetallic HydrogenHydrogenCrystallographySolid-state PhysicHydrogen TransitionNatural SciencesSpectroscopyApplied PhysicsCondensed Matter PhysicsHydrogen Embrittlement
The $T=5$ K isotherms of molecular ${\mathrm{H}}_{2}$ and ${\mathrm{D}}_{2}$ as well as the index of refraction to 370 kbar have been measured with a diamond-anvil cell. The hydrogens are somewhat softer than predicted from extrapolation of low-pressure measurements and the transition to the metallic atomic state is predicted to fall between 1.9 and 5.6 Mbar.
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