X-ray measured metallicities of the intra-cluster medium: a good measure for the metal mass? W. Kapferer, T. Kronberger, J. Weratschnig and S. Schindler A&A, 472 3 (2007) 757-762 Published online: 16 July 2007 DOI: 10.1051/0004-6361:20077563