  Surfaces in i-Al68Pd23Mn9 as observed with STM and LEED experiments show
atomic terraces in a Fibonacci spacing. We analyze them in a bulk tiling model
due to Elser which incorporates many experimental data. The model has
dodecahedral Bergman clusters within an icosahedral tiling T^*(2F) and is
projected from the 6D face-centered hypercubic lattice. We derive the
occurrence and Fibonacci spacing of atomic planes perpendicular to any 5fold
axis, compute the variation of planar atomic densities, and determine the
(auto-) correlation functions. Upon interpreting the planes as terraces at the
surface we find quantitative agreement with the STM experiments.
