Jilin Univ, Natl Lab Superhard Mat, Changchun 130023, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, Beijing 100800, Peoples R China
In situ high-pressure energy-dispersive x-ray diffraction measurements on alpha-LiIO3 have been performed by using a diamond anvil cell device with synchrotron radiation up to 75 GPa at room temperature. No new phase was found. The second Birch-Murnaghan equation of state is fitted with B-0 = 55 +/- 3 GPa for the zero-pressure bulk modulus, B'(0) = 2.9 +/- 0.4 for its pressure derivative.