Portlandite Xu H, Zhao Y, Zhang J, Hickmott D D, Daemen L L Physics and Chemistry of Minerals 34 (2007) 223-232 In situ neutron diffraction study of deuterated portlandite Ca(OD)2 at high pressure and temperature Sample: P = .78 GPa _database_code_amcsd 0009071 3.5592 3.5592 4.8155 90 90 120 P-3m1 atom x y z occ Uiso Ca 0 0 0 .006 O 1/3 2/3 .2394 .020 D .371 .742 .4290 1/3 .023