Portlandite Nagai T, Ito T, Hattori T, Yamanaka T Physics and Chemistry of Minerals 27 (2000) 462-466 Compression mechanism and amorphization of portlandite, Ca(OH)2: structural refinement under pressure Sample: P = 2.4 GPa _database_code_amcsd 0008415 3.5338 3.5338 4.7120 90 90 120 P-3m1 atom x y z Biso Ca 0 0 0 .33 OH 1/3 2/3 .244 1.2