Prediction of cell variations with pressure of ionic layered crystal Application to the matlockite family F. Decremps, M. Fischer, A. Polian, J. P. Itié and M. Sieskind Eur. Phys. J. B, 9 1 (1999) 49-57 Published online: 15 May 1999 DOI: 10.1007/s100510050741