Magnesite Ross N L American Mineralogist 82 (1997) 682-688 The equation of state and high-pressure behaviour of magnesite Sample: at P = 3.09 GPa _database_code_amcsd 0001907 4.6068 4.6068 14.8170 90 90 120 R-3c atom x y z Biso Mg 0 0 0 .30 C 0 0 .25 .39 O .2790 0 .25 .40