HfO2 Ruh R, Corfield P W R Journal of the American Ceramic Society 53 (1970) 126-129 Crystal structure of monoclinic hafnia and comparison with monoclinic zirconia Locality: synthetic _database_code_amcsd 0014063 5.1156 5.1722 5.2948 90 99.18 90 P2_1/c atom x y z Biso Hf .2759 .0412 .2078 .45 O1 .073 .346 .332 .45 O2 .446 .748 .488 .45