Cancrinite Fechtelkord M, Stief F, Buhl J-C American Mineralogist 86 (2001) 165-175 Sodium cation dynamics in nitrate cancrinite: A low and high temperature Na and H MAS NMR study and high temperature Rietveld structure refinement Sample: T = 296 K _database_code_amcsd 0002623 12.6666 12.6666 5.1808 90 90 120 P6_3 atom x y z occ Uiso Na1 1/3 2/3 .627 .99 .019 Na2 .134 .2710 .286 .99 .021 Si1 .082 .410 .75 .005 Al1 .337 .412 .742 .005 O1 .201 .403 .663 .006 O2 .1163 .552 .730 .006 O3 .038 .358 .044 .006 O4 .323 .353 .055 .006 N1 0 0 .56 .37 .01 N2 0 0 .75 .50 .01 ON1 .015 .908 .55 .37 .03 ON2 .884 .939 .803 .50 .03 OH1 .620 .33 .680 .39 .03