text: In geochemistry, a version of Henry's law applies to the solubility of a noble gas in contact with silicate melt. One equation used is
  where
  :C is the number concentrations of the solute gas in the melt and gas phases,
  :β = 1/kT, an inverse temperature parameter (k is the Boltzmann constant),
  :µ is the excess chemical potentials of the solute gas in the two phases.