Gibbsite Megaw H Zeitschrift fur Kristallographie 87 (1934) 185-204 The crystal structure of Hydrargillite Al (O H)3 _cod_database_code 1011081 _database_code_amcsd 0017978 8.641 5.070 9.720 90 85.43 90 P2_1/n atom x y z Al1 .177 .52 -.005 Al2 .333 .02 -.005 O1 .182 .202 -.11 O2 .682 .672 -.11 O3 .515 .132 -.11 O4 -.015 .632 -.11 O5 .298 .702 -.1 O6 .838 .172 -.1