Heulandite Wust T, Stolz J, Armbruster T American Mineralogist 84 (1999) 1126-1134 Partially dealuminated heulandite produced by acidic REECl3 solution: A chemical and single-crystal X-ray study Sample: REE293 Tetrahedral sites were refined as Si _database_code_amcsd 0002251 17.649 17.980 7.412 90 116.22 90 C2/m atom x y z occ Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Si1 .17734 .32961 .0917 .0159 .0283 .0181 -.0002 .0086 -.0010 Si2 .28418 .41088 .4894 .0268 .0215 .0260 -.0006 .0141 -.0007 Si3 .29145 .19068 .2853 .0227 .0243 .0171 -.0017 .0107 -.0001 Si4 .43161 .29831 .5786 .0175 .0300 .0178 .0002 .0076 -.0002 Si5 0 .2771 0 .0159 .0344 .0179 0 .0067 0 Al1 0 .4221 0 .120 1.7 Al2 .488 0 .556 .13 3.6 Al3 .205 .5 .199 .08 3.0 NaB .468 .5 .771 .39 11.0 O1 .2985 .5 .5263 .049 .022 .047 0 .021 0 O2 .2644 .1219 .3841 .059 .039 .050 .000 .040 .009 O3 .3131 .1556 .1120 .062 .049 .033 .000 .034 -.002 O4 .2253 .3965 .2459 .047 .041 .028 -.009 .010 -.009 O5 .5 .3208 .5 .052 .059 .062 0 .046 0 O6 .0785 .3327 .0409 .018 .041 .056 .000 .016 .007 O7 .3755 .2295 .4533 .048 .050 .047 -.018 .003 -.017 O8 .0179 .2246 .1894 .048 .058 .026 -.006 .008 .011 O9 .2150 .2501 .1882 .035 .037 .050 .013 .022 .012 O10 .3765 .3711 .5591 .032 .040 .067 .011 .021 .002 WatA1 .369 0 .348 .51 8.4 WatA2 .390 0 .51 .28 15.79 WatA3 .402 0 .235 .39 15.79 WatA4 .398 0 .061 .17 6.5 WatA5 .433 0 .788 .47 15.0 WatA6 .560 0 .036 .47 13.9 WatA8 .496 .091 .583 .37 11.9 WatA9 .478 .072 .707 .27 11.3 WatB1 .3930 .411 .097 .39 13.8 WatBb .436 .430 .001 .47 15.79 WatB2 .512 .5 .564 .55 11.1 WatB3 .406 .5 .059 .14 3.7 WatC2 .212 0 -.014 .64 9.5 WatC3 .2582 0 .089 .52 3.0