The structure of the clean Pt(111) surface was studied between 300K and 0.92Tm (Tm = 2045K) via X-ray scattering. The surface was unreconstructed for temperatures less than 0.65Tm, but reconstructs at higher temperatures to form a layer isotropically compressed and incommensurate with the underlying bulk (111) planes. A disordered arrangement of discommensurations separated regions with ideal fcc stacking from regions with faulted stacking. With increasing temperature, both the compression of the surface layer and the orientational order of the discommensurations increase.

Reconstruction of the Pt(111) Surface. A.R.Sandy, S.G.J.Mochrie, D.M.Zehner, G.Grübel, K.G.Huang, D.Gibbs: Physical Review Letters, 1992, 68, 2192-5