The results of X-ray scattering studies of the (111) and (001) surfaces were summarized. It was found that each of these surfaces exhibited, within some temperature range, a reconstruction which approximated a close-packed hexagonal layer that was denser than the (111) planes of bulk Au or Pt. The results were analyzed within the context of recent theories of surface reconstruction and of 2-dimensional phase transformations.

D.L.Abernathy, D.Gibbs, G.Grübel, K.G.Huang, S.G.J.Mochrie, A.R.Sandy, D.M.Zehner: Surface Science, 1993, 283, 260-76