Magnesium Straumanis M E Journal of Applied Physics 20 (1949) 726-734 The precision determination of lattice constants by the powder and rotation crystal methods and applications Locality: synthetic Sample: at T = 25 C _database_code_amcsd 0012871 3.2093 3.2093 5.2103 90 90 120 P6_3/mmc atom x y z Mg 1/3 2/3 .25