title: Quantitative adsorbate structure determination for quasicrystals using x-ray standing waves.
abstract: The quantitative structure determination of adsorbed species on quasicrystal surfaces has so far appeared to present insurmountable problems. The normal incidence standing x-ray wave field technique offers a simple solution, without extensive data sets or large computations. Its application to quasicrystals raises several conceptual difficulties that are related to the phase problem in x-ray diffraction. We demonstrate their solution for the case of Si atoms adsorbed on the decagonal Co-rich modification of the Al-Co-Ni quasicrystal to determine the local structure, comprising 6-atom clusters in particular hollow sites.
authors.affiliation: Department of Physics, Penn State University, University Park, Pennsylvania 16802, USA.
authors.forename: R D
authors.initials: RD
authors.lastname: Diehl
authors.affiliation: Department of Physics, Penn State University, University Park, Pennsylvania 16802, USA.
authors.forename: H I
authors.initials: HI
authors.lastname: Li
authors.affiliation: Department of Physics, Penn State University, University Park, Pennsylvania 16802, USA.
authors.forename: S Y
authors.initials: SY
authors.lastname: Su
authors.affiliation: Department of Physics, Penn State University, University Park, Pennsylvania 16802, USA.
authors.forename: A
authors.initials: A
authors.lastname: Mayer
authors.affiliation: Department of Physics, Penn State University, University Park, Pennsylvania 16802, USA.
authors.forename: N A
authors.initials: NA
authors.lastname: Stanisha
authors.affiliation: Institut Jean Lamour UMR7198 (CNRS-Université de Lorraine), Parc de Saurupt, 54011 Nancy Cedex, France.
authors.forename: J
authors.initials: J
authors.lastname: Ledieu
authors.affiliation: School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
authors.forename: K R J
authors.initials: KR
authors.lastname: Lovelock
authors.affiliation: School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
authors.forename: Robert G
authors.initials: RG
authors.lastname: Jones
authors.affiliation: School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
authors.forename: A
authors.initials: A
authors.lastname: Deyko
authors.affiliation: Department of Physics and Surface Science Research Centre, University of Liverpool, Liverpool L69 3BX, United Kingdom.
authors.forename: L H
authors.initials: LH
authors.lastname: Wearing
authors.affiliation: Department of Physics and Surface Science Research Centre, University of Liverpool, Liverpool L69 3BX, United Kingdom.
authors.forename: R
authors.initials: R
authors.lastname: McGrath
authors.affiliation: Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom.
authors.forename: A
authors.initials: A
authors.lastname: Chaudhuri
authors.affiliation: Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom.
authors.forename: D P
authors.initials: DP
authors.lastname: Woodruff