Heulandite-Ca Comodi P, Gatta G D, Zanazzi P F European Journal of Mineralogy 13 (2001) 497-505 High-pressure structural behaviour of heulandite Sample: P = .0001 GPa (after compression) _database_code_amcsd 0006869 17.774 17.824 7.438 90 116.38 90 C2/m atom x y z occ Uiso NaCS1 .1543 0 .6757 .43 .044 KCS1 .1543 0 .6757 .10 .044 CaCS1 .1543 0 .6757 .1625 .044 BaCS1 .1543 0 .6757 .0075 .044 SrCS1 .1543 0 .6757 .2175 .044 CaCS2 .0408 .5 .2003 .5 .028 AlT1 .1796 .1682 .0957 .192 .0142 SiT1 .1796 .1682 .0957 .808 .0142 SiT2 .2109 .4098 .4985 .637 .0143 AlT2 .2109 .4098 .4985 .363 .0143 SiT3 .2088 .1910 .7183 .801 .0138 AlT3 .2088 .1910 .7183 .199 .0138 SiT4 .0643 .2984 .4111 .806 .0145 AlT4 .0643 .2984 .4111 .194 .0145 SiT5 0 .2115 0 .666 .0165 AlT5 0 .2115 0 .334 .0165 O1 .1953 .5 .450 .028 O2 .2316 .1206 .6116 .029 O3 .1854 .1524 .8855 .029 O4 .2403 .1059 .2566 .027 O5 0 .3266 .5 .034 O6 .0833 .1558 .0626 .025 O7 .1271 .2348 .5542 .038 O8 .0094 .2658 .1863 .035 O9 .2099 .2532 .1756 .027 O10 .1151 .3726 .3975 .028 Wat1 .2223 .5 -.009 .048 Wat2 .0795 0 .875 .111 Wat3 .0769 .4172 .969 .062 Wat4 0 .5 .5 .074 Wat5 0 .0909 .5 .21 Wat6 .097 0 .291 .13