Cancrinite Hassan I, Grundy H D The Canadian Mineralogist 29 (1991) 377-383 The crystal structure of basic cancrinite, ideally Na8[Al6Si6O24](OH)2.3H2O _database_code_amcsd 0005267 12.664 12.664 5.159 90 90 120 P6_3 atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) O1 .2022 .4034 .6653 .0104 .0252 .0173 .0116 -.0002 .0005 O2 .1184 .5647 .7269 .0204 .0141 .0359 .0106 .0054 .0040 O3 .0287 .3531 .0579 .0172 .0264 .0074 .0120 .0037 .0044 O4 .3190 .3611 .0421 .0254 .0267 .0101 .0197 .0011 .0026 Si .3298 .4125 .75 .0089 .0096 .0079 .0055 -.0011 .0003 Al .0764 .4133 .7515 .0071 .0086 .0084 .0035 -.0005 .0011 O51 .0514 .1087 .6714 .17 .0214 O52 .0541 .1096 .9377 .17 .0236 O5 0 0 .6913 .34 .0361 O6 .6152 .3097 .6835 .33 .0637 .0653 .0471 .0232 .0056 .0090 Na1 2/3 1/3 .1250 .0218 .0218 .0567 .0109 0 0 Na2 .1320 .2669 .2867 .0286 .0563 .0386 .0288 -.0032 -.0062