Abstract
Powder X-ray diffraction patterns were recorded for samples submitted to high pressures in an improved diamond anvil cell where the alignment of the two diamonds is achieved by the free rotation of both axes bearing the piston and cylinder. First results on CeB6 and CeTe up to 25 GPa are discussed. The relative volume of CeB6 decreases smoothly with pressure and no difference with previously reported results on LaB6 is noticed. The volume of CeTe shows an anomalous pressure dependence and a NaCl → CsCl phase transformation