Vaterite Le Bail A, Ouhenia S, Chateigner D Powder Diffraction 26 (2011) 16-21 Microtwinning hypothesis for a more ordered vaterite model Locality: synthetic _database_code_amcsd 0019019 8.4721 7.1575 4.1265 90 90 90 Ama2 atom x y z Biso Ca .5 .5 0 1.86 C .25 .640 .452 3.12 O1 .3795 .6711 .5636 3.12 O2 .25 .5432 .1912 3.12