An anatase single crystal mineral is examined with low energy electron diff
raction, X-ray photoelectron spectroscopy and X-ray photoelectron diffracti
on. Different gasses (He or Ar) are used to clean the sample and their infl
uence on the azimuthal XPD curves is checked. Azimuthal scans for the polar
angles 15, 28 and 51 degrees off surface are recorded. Experimental data a
re compared with single scattering cluster calculations on two different su
rface models. A comparison with literature results on thin anatase films is
made. (C) 2001 Elsevier Science Ltd. All rights reserved.