Coverage-dependent adsorption sites in the K/Ru(0001) system: a low-energy electron-diffraction analysis

Gierer, Martin; Bludau, Horst; Hertel, Tobias; Over, Herbert; Moritz, Wolfgang und Ertl, Gerhard (1992): Coverage-dependent adsorption sites in the K/Ru(0001) system: a low-energy electron-diffraction analysis. In: Surface Science, Vol. 279, No. 1-2: L170-L174

Abstract

The two ordered phases p(2 × 2) at a coverage θ = 0.25 and (√3 × √3)R30° at θ = 0.33 of potassium adsorbed on Ru(0001) were analyzed by use of low-energy electron-diffraction (LEED). In the (√3 × √3)R30° phase, the K atoms occupy threefold hcp sites, while in the p(2 × 2) phase the fcc site is favoured. In both phases, the K hard-sphere radii are nearly the same and close to the covalent Pauling radius.

• Item Type: Journal article
• Faculties: Geosciences > Department of Earth and Environmental Sciences > Crystallography and Materials Science
• Subjects: 500 Science > 550 Earth sciences and geology
• Language: English