Prehnite Detrie T A, Ross N L, Angel R J, Gatta G D European Journal of Mineralogy 21 (2009) 561-570 Equation of state and structure of prehnite to 9.8 GPa Locality: N'Chwaning II mine, Kuruman, South Africa Note: P = 5.111 GPa _database_code_amcsd 0007291 4.5414 5.4023 18.2913 90 90 90 Pncm atom x y z occ Uiso Ca 0 .5 .0996 .012 Al 0 0 0 .008 SiT1 .5 0 .1187 .006 AlT2 .1963 .75 .25 .5 .005 SiT2 .1963 .75 .25 .5 .005 O1 -.7537 .1355 .0712 .010 O2 -.3732 .2192 .1718 .012 O3 0 .5 .232 .019 OH -.214 .3045 0 .009