Heulandite-Ca
Mortier W J, Pearce J R
American Mineralogist 66 (1981) 309-314
Thermal stability of the heulandite-type framework: Crystal structure of the
calcium/ammonium form dehydrated at 483K
_database_code_amcsd 0000810
17.158 17.433 7.388 90 113.41 90 C2/m
atom     x     y     z  occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Ca1  .2591    .5 .0820 .603 0.0137 0.0044 0.0664      0 0.0082      0
Ca2  .0326     0 .2901 .190 0.0052 0.0037 0.0504      0 0.0092      0
Si1  .3200 .1632 .2343 .769 0.0014 0.0029 0.0086 0.0002 0.0011 0.0006
Al1  .3200 .1632 .2343 .231 0.0014 0.0029 0.0086 0.0002 0.0011 0.0006
Si2  .0668 .2137 .2154 .769 0.0019 0.0026 0.0090 0.0005 0.0015 0.0002
Al2  .0668 .2137 .2154 .231 0.0019 0.0026 0.0090 0.0005 0.0015 0.0002
Si3  .2162 .3145 .2018 .769 0.0026 0.0026 0.0092 0.0000 0.0022 0.0001
Al3  .2162 .3145 .2018 .231 0.0026 0.0026 0.0092 0.0000 0.0022 0.0001
Si4  .2020 .0895 .4121 .769 0.0028 0.0016 0.0119 0.0001 0.0024 0.0001
Al4  .2020 .0895 .4121 .231 0.0028 0.0016 0.0119 0.0001 0.0024 0.0001
Si5      0 .2956    .5 .769 0.0016 0.0024 0.0102      0 0.0019      0
Al5      0 .2956    .5 .231 0.0016 0.0024 0.0102      0 0.0019      0
O1   .4190 .1504 .3841      0.0019 0.0030 0.0189 0.0001 -.0003 0.0006
O2   .2906 .2513 .2421      0.0032 0.0031 0.0149 0.0010 0.0017 0.0006
O3   .3068 .1409 .0091      0.0043 0.0049 0.0128 0.0011 0.0033 0.0006
O4   .0170 .2408 .3462      0.0052 0.0046 0.0347 -.0008 0.0089 -.0054
O5   .2627 .1018 .2909      0.0032 0.0047 0.0271 -.0007 0.0049 0.0022
O6   .1117 .1337 .3046      0.0043 0.0041 0.0401 0.0015 0.0057 0.0033
O7   .2520 .3862 .3558      0.0068 0.0065 0.0160 0.0005 0.0014 -.0034
O8   .1345 .2768 .2172      0.0054 0.0045 0.0522 -.0002 0.0117 0.0030
O9   .1765     0 .4097      0.0071 0.0020 0.0580      0 0.0144      0
O10      0 .1948     0      0.0109 0.0070 0.0087      0 -.0039      0