2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/14698One hundred and six galaxy clusters have been studied in detail using X-ray data and important global physical properties have been determined. Correlations between these properties are studied with respect to the description of clusters as a self-similar class of objects. The results support the self-similar picture only partly and significant deviations are found for some correlations.4 pages; to be published in the Proceedings of the Ringberg Workshop on Diffuse Thermal and Relativistic Plasma in Galaxy Clusters, Ringberg Castle (1999); also available at http://www.xray.mpe.mpg.de/~reiprich/act/publi.htmlAstrophysicstext