Magnesite Fiquet G, Guyot F, Kunz M, Matas J, Andrault D, Hanfland M American Mineralogist 87 (2002) 1261-1265 Structural refinements of magnesite at very high pressure Sample: P = 82.6 GPa Locality: Bahia, Brazil _database_code_amcsd 0002909 4.2783 4.2783 12.5461 90 90 120 R-3c atom x y z Mg 0 0 0 C 0 0 .25 O .2960 0 .25