Laumontite Fridriksson T, Bish D L, Bird D K American Mineralogist 88 (2003) 277-287 Hydrogen-bonded water in laumontite I: X-ray powder diffraction study of water site occupancy and structural changes in laumontite during room-temperature isothermal hydration/dehydration Sample: P = 0.11 mbar PH2O _database_code_amcsd 0002978 14.70542 13.07118 7.45156 90 112.121 90 C2/m atom x y z occ Uiso Si1 .23740 .38250 .15688 .00108 Si2 .07813 .38454 .31593 .00125 Al .13040 .30946 .72981 .0004 O1 .25780 .50 .2346 .0038 O2 .21509 .37643 .9277 .0038 O3 .14697 .38502 .5461 .0038 O4 .14338 .34208 .1982 .0038 O5 .33276 .31728 .2794 .0038 O6 .04374 .50 .2497 .0038 O7 .01177 .30891 .7235 .0038 Ca .27328 .50 .75034 .0069 Wat1 .025 .17 .00 .030 .0192 Wat2 .41694 .47696 .0589 .50 .0192 Wat5 .50 .4378 .50 .066 .0317 Wat8 .11752 .12007 .3205 .0317