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A dynamical LEED study of the (3x3) structure which forms upon coadsorption of K and O on Ni(100) indicates that this structure is comprised of one K atom and four O atoms per (3x3) unit cell. The K atom is adsorbed in a substitutional site, and surrounded by four O atoms in hollow sites. The four O atoms are displaced by 0.35+/-0.08 9 from the centers of the hollows, and the average O Ni distance...
Oxygen adsorption on the Rh(100) surface has been studied by spot profile analysis low energy electron diffraction (SPA-LEED) and scanning tunnelling microscopy (STM). Our results show that oxygen can be reliably dosed onto the Rh(100) surface to produce distinct p(2 2) and c(2 2) phases. Additionally, the symmetry of the phase formed at saturation coverage is identified as (2 2)p4g rather...
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