SOLUBILITY OF SOLID H-2 AND NE IN HIGH-PRESSURE HE-4

The enhancements of the vapour pressures of solid H2 and solid Ne produced by the action of high-pressure He have been measured at low temperatures and at pressures up to 80 MPa (800 atm) using a static method. Values deduced for the mixed virial coefficient, B12, for the He-Ne system agree well with those derived recently from the more complex flow method, while for the He-H2 system there is fair agreement with an extrapolation of values derived from P, V, T measurements.