Offretite Gualtieri A, Artioli G, Passaglia E, Bigi S, Viani A, Hanson J C American Mineralogist 83 (1998) 590-606 Crystal structure-crystal chemistry relationships in the zeolites erionite and offretite Sample #1 from Fitta _database_code_amcsd 0002006 13.390 13.390 7.598 90 90 120 P-6m2 atom x y z occ Uiso Si1 -.0014 .2321 .2087 .70 .039 Al1 -.0014 .2321 .2087 .30 .039 Si2 .0884 .4231 .5 .70 .020 Al2 .0884 .4231 .5 .30 .020 Ca1 2/3 1/3 .4021 .40 .042 Ca2 2/3 1/3 .2664 .36 .048 K 0 0 .5 .96 .051 Mg 1/3 2/3 0 .97 .043 O1 .0260 .3494 .3160 .020 O2 .0962 .9037 .2500 .028 O3 .8734 .1265 .2926 .066 O4 .0052 .2644 0 .022 O5 .2331 .7668 .5 .026 O6 .4602 .5397 .5 .037 Wat1 1/3 2/3 .2335 .120 Wat2 .2432 .7568 0 .81 .063 Wat3 .1350 .5104 0 .26 .060 Wat4 .7663 .2337 .5 .85 .056 Wat5 -.4325 .4325 .1682 .062 Wat6 -.2539 .2539 0 .32 .060