Thermodynamic properties and melting of solid helium

  title={Thermodynamic properties and melting of solid helium},
  author={Jack Stuart Dugdale and Franz Eugen Simon},
  journal={Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences},
  pages={291 - 310}
  • J. Dugdale, F. Simon
  • Published 7 July 1953
  • Materials Science
  • Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
The melting properties and thermodynamic functions of solid helium have been determined at temperatures from 4 to 26° K and at pressures up to 3000 atm. The upper temperature corresponds to about five times the critical temperature of helium; it was therefore possible to measure properties of the solid state in a range which has not yet been attained for any other substance. The melting curve shows no signs of an approach to a solid-fluid critical point; in fact, the difference between the… 

Figures from this paper

Lattice Heat Capacity of Solid Hydrogen
The lattice heat capacity of solid hydrogen was measured at zero pressure, and at three constant volumes. The measurements extend from 2°K to the triple point for the zero‐pressure data, from 2°K to
Melting properties and ultrasonic velocity of nitrogen to 20 kbar
Simultaneous measurements of the longitudinal sound velocity and relative volume were made on freezing nitrogen at pressures up to 20 kbar in a piston–cylinder apparatus. Results in both the fluid
LVIII. Some vibrational properties of solid helium
Summary A series of experimental measurements on the specific heat and other vibrational properties of solid helium, due to J. S. Dugdale and F. E. Simon, are here given a theoretical basis in terms
Experimental Determination of the P—T Melting Curves of Kr, Ne, and He
Pressure—temperature melting data have been obtained at pressures of 0–8 kbar for Kr, 0–10 kbar for Ne, and 1–10 kbar for He. The estimated accuracy of the data is ± 1 bar and ± 0.002 to ± 0.011oK.
Multilayer Adsorption of Helium on Argon
Experimental isotherms and heats of adsorption of helium on an argon surface are reported for temperatures from 10° to 20°K. The potential energy of interaction of a helium atom with an argon surface
Raman spectra and phase diagram of fluorine at pressures up to 6 GPa and temperatures between 10 and 320 K
The Raman spectra and phase diagram of fluorine were studied in a diamond‐anvil cell up to 6 GPa over the temperature range 10–300 K. The sample slowly reacted with the diamond anvils to form CF4.
Theory and properties of solid argon
In the last few years measurements have been made of the thermodynamic properties of solid argon which provide ideal material for the verification of the theory of crystal lattices. Starting from the
Measurements of longitudinal and transverse ultrasonic wave velocities in compressed solidified argon and their relationship to melting theory
Measurements of longitudinal and transverse ultrasonic wave velocities have been made on compressed, solidified argon for pressures up to 6 kbar (600 MPa) corresponding to melting temperatures in the


Solid Helium at ‘High’ Temperatures
THE solid–fluid equilibrium curves (or melting curves) of ordinary substances cannot be studied over very wide temperature-ranges because of difficulties which arise from the fact that the melting
LXX. The thermal conductivity of solid helium at high densities
Abstract Earlier measurements of the thermal conductivity of solid helium (Webb, Wilkinson and Wilks 1952) have been extended to higher densities by using pressures up to 1800 atmospheres. Values of
CXXX. The melting curve at high pressures
Abstract An attempt is made to derive theoretically the Simon formula for the variation of the melting point of a solid with pressure. The model used is similar to that of Lennard Jones and
Behaviour of Condensed Helium near Absolute Zero
THE recently published measurements1 on some properties of condensed helium, in conjunction with the facts known from the work of Keesom and his co-workers2, allow us to draw some conclusions on the
L. Farkas memorial volume