Heulandite-Ca Merkle A B, Slaughter M American Mineralogist 53 (1968) 1120-1138 Determination and refinement of the structure of heulandite _database_code_amcsd 0000180 17.73 17.82 7.43 90 116.33 90 Cm atom x y z occ Biso Ca1 .1417 0 .8478 .34 2.95 Ca2 .4355 0 .1776 .38 3.91 Ca3 .2403 .5 .2989 .48 2.35 Si1 .1075 .1693 .4049 .75 1.32 Al1 .1075 .1693 .4049 .25 1.32 Al2 .9968 .9096 .0056 .75 1.83 Si2 .9968 .9096 .0056 .25 1.83 Si3 .0773 .1917 .7880 1.24 Si4 .3488 .3020 .9107 .60 1.23 Al4 .3488 .3020 .9107 .40 1.23 Si5 .2852 .2152 .5075 1.14 Si6 .4907 .1907 .2188 .89 Si7 .4652 .1708 .5978 .75 .68 Al7 .4652 .1708 .5978 .25 .68 Si8 .2204 .2990 .0899 1.35 Al9 .0714 .4104 .0043 .75 .76 Si9 .0714 .4104 .0043 .25 .76 O1 .9820 0 .9746 3.01 O2 .0626 .1202 .8931 1.80 O3 .0966 .1499 .6104 3.33 O4 .0456 .1087 .2566 1.97 O5 .2851 .3318 .0077 2.21 O6 .2069 .1621 .4386 1.83 O7 .1552 .2425 .9541 4.07 O8 .2951 .2685 .6890 2.34 O9 .0717 .2552 .3240 1.66 O10 .2775 .2646 .3196 2.60 O11 .3666 .1613 .5673 1.62 O12 .0175 .3984 .7552 2.45 O13 .0933 .5 .0873 3.03 O14 .4608 .1575 .3774 .36 O15 .4978 .2551 .6450 3.51 O16 .4085 .3758 .9159 4.30 O17 .0198 .3812 .1167 3.42 O18 .1699 .3746 .1234 1.31 O19 .4100 .2328 .0553 1.82 Wat1 .9957 0 .4686 .88 Wat2 .0388 .5 .4648 1.13 Wat3 .2005 .4079 .5270 4.89 Wat4 .2765 .5 .9634 5.98 Wat5 .3545 .4267 .4683 5.25 Wat6 .3665 0 .7543 3.17 Wat7 .1548 0 .1553 .30 4.20 Wat8 .1985 0 .5998 .32 4.00 Wat9 .2882 .1001 .0552 .30 4.10 Wat10 .3628 0 .4000 .18 4.10 Wat11 .2898 0 .3030 .15 4.10