The cosmological analysis of X-ray cluster surveys - III. 4D X-ray observable diagramsM. Pierre, A. Valotti, L. Faccioli, N. Clerc, R. Gastaud, E. Koulouridis and F. PacaudA&A, 607 (2017) A123DOI: https://doi.org/10.1051/0004-6361/201629765