The changes in in situ Raman spectra of ice in aqueous KCI solution have been measured as a function of pressure at liquid nitrogen temperature (77 K). The ice that is formed abruptly transforms to a crystalline phase at similar to800 MPa. It has a spectrum close to that of ice VII' to which high density amorphous (hda) ice transforms at about 4 GPa. This behavior contrasts with that of the ice in aqueous LiCl solution, which transforms to an amorphous phase at similar to500 MPa, as in the case of pressure-induced amorphization of ice I-h to hda. (C) 2004 Elsevier B.V. All rights reserved.