or In(PO3)3. Figure : Relative atomic surface concentration of different elements (O, P, In, Ge, Ga) present across the tapered cross-section Ge|GaInP. These concentrations were determined from the individual core level spectra across the tapered cross-section. The full spectra were integrated without distinction between the different states. Core level spectra were recorded at different positions with a step of 75 µm.