Natrolite Baur W H, Kassner D, Kim C, Sieber N H W European Journal of Mineralogy 2 (1990) 761-769 Flexibility and distortion of the framework of natrolite: crystal structures of ion-exchanged natrolites Sample: Li-natrolite, LI _database_code_amcsd 0006391 17.678 18.509 6.488 90 90 90 Fdd2 atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Li .2192 .5376 .1222 .83 .0650 .0690 .0320 -.0070 -.0100 -.0140 Na .2192 .5376 .1222 .17 .0650 .0690 .0320 -.0070 -.0100 -.0140 Si1 0 0 0 .0400 .0170 .0020 .0040 0 0 Si2 .1487 .2147 .6217 .0410 .0150 .0030 .0030 -.0020 -.0020 Al .2139 .3431 .8656 .0430 .0130 .0030 .0000 .0000 .0020 O1 .0122 .073 .8672 .0480 .0160 .0120 -.0010 .0130 .0040 O2 .1851 .4319 .8516 .0420 .0210 .0040 .0000 -.0020 -.0010 O3 .1452 .2838 .7723 .0510 .0180 .0050 -.0030 .0000 -.0060 O4 .2927 .3451 .7050 .0490 .0220 .0080 .0050 .0100 .0030 O5 .9260 .0095 .1406 .0400 .0280 .0140 -.0040 .0010 -.0040 OW .2079 .4497 .3619 .0610 .0310 .0300 -.0010 .0180 .0000 H1 .035 .159 .125 .024 H2 .086 .198 .166 .019