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: DEHY323 Tetrahedral sites were refined as Si _database_code_amcsd 0002253 17.583 17.695 7.408 90 116.52 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 .17822 .33236 .0912 .0147 .0357 .0186 .0009 .0078 -.0013 Si2 .28602 .41093 .4940 .0273 .0260 .0268 .0003 .0133 .0000 Si3 .29190 .19000 .2828 .0236 .0301 .0174 -.0006 .0109 .0009 Si4 .43360 .29733 .5820 .0184 .0351 .0188 .0020 .0081 .0006 Si5 0 .2813 0 .0162 .0420 .0178 0 .0057 0 Al1 0 .4210 0 .12 2.1 Al2 .489 0 .550 .13 3.7 Al3 .235 .5 .178 .033 2.37 NaB .462 .5 .724 .19 8.01 O1 .3019 .5 .5391 .064 .030 .051 0 .022 0 O2 .2645 .1217 .3843 .070 .057 .064 .007 .050 .021 O3 .3144 .1508 .1146 .057 .060 .035 .014 .032 .005 O4 .2304 .3977 .2497 .040 .052 .033 -.010 .010 -.008 O5 .5 .3217 .5 .074 .087 .074 0 .065 0 O6 .0799 .3374 .0499 .018 .042 .047 .001 .014 .001 O7 .3757 .2298 .4517 .054 .062 .054 -.011 .000 -.021 O8 .0141 .2284 .1878 .049 .066 .028 -.003 .008 .013 O9 .2153 .2497 .1797 .033 .041 .043 .011 .022 .008 O10 .3792 .3713 .5719 .035 .054 .066 .015 .015 -.001 WatA1 .373 0 .380 .12 4.9 WatA3 .391 0 .296 .12 4.1 WatA4 .418 0 .100 .12 12.2 WatA6 .076 .5 .047 .25 5.92 WatA8 .505 .089 .620 .10 5.5 WatA9 .473 .080 .710 .15 4.7 WatB2 .525 .5 .612 .32 15.79 WatB3 .410 .5 .079 .17 2.3 WatC2 .224 0 .034 .30 4.2 WatC3 .259 0 .083 .22 2.9