Heulandite-Sr Dobelin N, Armbruster T American Mineralogist 88 (2003) 527-533 Stepwise dehydration of Sr-exchanged heulandite: A single-crystal X-ray study Note: dehydrated at 250 deg C, measured at -170 deg C _database_code_amcsd 0002995 17.60 17.59 7.408 90 116.76 90 Cm atom x y z occ Biso Sr1 1.183 0 1.732 .31 4.0 Sr1' .955 0 .61 .03 3.95 Sr2 .799 0 .238 .12 .1 Sr2' 1.212 0 1.814 .18 2.8 Sr3 1.472 0 1.791 .19 3.1 Sr3' 1.521 0 1.254 .08 3.95 Sr4 1.487 0 1.718 .31 4.3 Sr7 .760 0 .058 .22 3.0 Sr7' 1.249 0 1.939 .29 2.9 Si1 .8169 .8321 .906 .75 1.9 Al1 .8169 .8321 .906 .25 1.9 Si1' 1.1777 1.1630 1.094 .75 2.4 Al1' 1.1777 1.1630 1.094 .25 2.4 Si2 .6956 .9100 .484 .75 2.9 Al2 .6956 .9100 .484 .25 2.9 Si2' 1.2890 1.0895 1.499 .75 1.9 Al2' 1.2890 1.0895 1.499 .25 1.9 Si3 .7112 .6898 .727 .75 1.8 Al3 .7112 .6898 .727 .25 1.8 Si3' 1.2859 1.3142 1.277 .75 3.0 Al3' 1.2859 1.3142 1.277 .25 3.0 Si4 .9342 .7038 .589 .75 2.3 Al4 .9342 .7038 .589 .25 2.3 Si4' 1.0639 1.2875 1.413 .75 2.6 Al4' 1.0639 1.2875 1.413 .25 2.6 Si5 .9967 .7943 .996 .75 2.28 Al5 .9967 .7943 .996 .25 2.28 O1 .701 0 .434 5.7 O1' 1.319 0 1.555 2.9 O2 .766 .883 .386 3.8 O2' 1.257 1.115 1.660 5.1 O3 .801 .859 1.106 4.0 O3' 1.178 1.1475 .883 2.0 O4 .750 .903 .738 3.6 O4' 1.235 1.110 1.254 2.8 O5 .984 .687 .467 5.2 O6 .914 .847 .964 3.6 O6' 1.079 1.1518 1.066 2.1 O7 .637 .727 .539 4.5 O7' 1.375 1.264 1.444 5.4 O8 .987 .7464 .798 2.2 O8' 1.022 1.267 1.177 6.0 O9 .7948 .7452 .848 1.6 O9' 1.213 1.249 1.167 3.5 O10 .889 .639 .609 4.6 O10' 1.107 1.377 1.401 4.3 Wat1 1.292 0 2.027 5.2 Wat3 1.508 0 1.49 18.8 Wat4' 1.613 .850 1.98 .35 7.1 Wat5 1.076 0 1.898 .71 3.3 Wat7 1.470 1.094 2.005 .47 4.9 Wat7' 1.391 1.089 2.077 .7 8.4 Wat8 1.019 1.072 1.54 .36 7.0 Wat11' .905 0 2.153 .53 4.2 Wat13 .725 0 .079 4.1 Wat14 1.078 0 1.35 .3 4.5