Abundance of minerals in the phyllosilicate-rich units on Mars F. Poulet, N. Mangold, D. Loizeau, J.-P. Bibring, Y. Langevin, J. Michalski and B. Gondet A&A, 487 2 (2008) L41-L44 Published online: 01 July 2008 DOI: 10.1051/0004-6361:200810150