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 = 16.4 mbar PH2O _database_code_amcsd 0002979 14.74716 13.06601 7.55735 90 112.0399 90 C2/m atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Si1 .23817 .38214 .15752 .0047 Si2 .08328 .38332 .32681 .0038 Al .12850 .31001 .73388 .0046 O1 .26062 .50 .2272 .0077 O2 .20980 .37876 .9291 .0077 O3 .14738 .38453 .5544 .0077 O4 .14923 .34054 .2133 .0077 O5 .33694 .31729 .2700 .0077 O6 .05190 .50 .2621 .0077 O7 .00863 .30915 .7201 .0077 Ca .27194 .50 .75867 .0126 Wat1 .025 .17 .00 .011 .0469 Wat2 .41577 .46147 .0573 .50 .0469 Wat5 .50 .43509 .50 .50 .0557 Wat8 .11622 .11218 .3000 .0339 .091 .226 .008 .047 -.091