34th International Field Emission Symposium / 34ème Symposium International d'Emission de Champ
J. Phys. Colloques 48 (1987) C6-47-C6-52
DOI: 10.1051/jphyscol:1987608
THE ATOMIC STRUCTURE OF THE ICOSAHEDRAL PHASE PROBED BY FIELD ION MICROSCOPY COMPARED WITH COMPUTER SIMULATIONS
H.B. Elswijk, P.M. Bronsveld et J.Th.M. De HossonDepartment of Applied Physics, Materials Science Centre, University of Groningen, Nijenborgh 18, 9747 AG Groningen, The Netherlands
Abstract
Field ion images have been simulated of fifteen different decorations of the rhombohedral cells of the three dimensional Penrose packing in order to achieve a best fit with FIM experiment. The decorations having the correct number of atoms per unit cell result in strong fivefold poles in the FIM image. In contrast, the experimental images show two- and threefold poles stronger than fivefold ones.