Melting curves of molecular hydrogen and molecular deuterium under high pressures between 20 and 373 K

Journal Article · Mon Jul 01 00:00:00 EDT 1985 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.32.381· OSTI ID:5564234

Diatschenko, V; Chu, C W; Liebenberg, D H; Young, D A; Ross, M; Mills, R L

We determined the melting curve of molecular hydrogen and molecular deuterium at closely spaced intervals from 20 to 373 K by two different techniques using high-pressure diamond cells. The cells were loaded with liquid at low temperature or with compressed gas at room temperature. Empirical functions for the melting curves were evaluated from least-squares fits of the data. Values of the compressibility and Debye temperature were computed at melting, and the results are compared with those calculated from various theoretical models. The good agreement shows that the models are generally valid, although small systematic deviations may point the way toward refinements in modeling. Our study also demonstrates the need to determine a one-piece intermolecular potential valid over a wide pressure range by refitting all experimental data, including the shock data recently made available.

• Research Organization: Department of Physics and Energy Laboratory, University of HoustonUniversity Park, Houston, Texas 77004
• OSTI ID: 5564234
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 32:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DEUTERIUM
MELTING
HYDROGEN
COMPRESSIBILITY
DEBYE TEMPERATURE
EXPERIMENTAL DATA
INTERMOLECULAR FORCES
LOW TEMPERATURE
MEDIUM TEMPERATURE
MOLECULAR CRYSTALS
PHASE DIAGRAMS
POTENTIALS
VERY HIGH PRESSURE
VERY LOW TEMPERATURE
CRYSTALS
DATA
DIAGRAMS
ELEMENTS
HYDROGEN ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
MECHANICAL PROPERTIES
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
PHASE TRANSFORMATIONS
STABLE ISOTOPES
360603* - Materials- Properties