In the presented study novel methods were applied to analyse the changes of the cement phase composition due to sulphate attack. The analytical methods were based on spatial x-ray diffraction using synchrotron radiation and incoherent white x-ray radiation. The spatial resolution of the methods is ca. 10 μm and 400 μm, respectively. The specimens for phase analysis consisted of thick sections of sulphate exposed cement paste specimen. Different cement pastes showed a clear evolution in the sulphate and phase distribution. Phase analytical data was compared to chemical information acquired by SEM-EDX analysis.