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 = P = 37.6 mbar PH2O _database_code_amcsd 0002980 14.8786 13.1708 7.5373 90 110.196 90 C2/m atom x y z occ Uiso Si1 .23594 .38305 .1507 .01077 Si2 .07851 .38374 .3254 .00757 Al .12877 .30795 .7362 .01049 O1 .2586 .50 .2202 .0107 O2 .2094 .3790 .9242 .0106 O3 .1391 .3780 .5472 .0085 O4 .14540 .3450 .2079 .0030 O5 .3292 .31594 .2616 .0055 O6 .0450 .50 .2691 .0055 O7 .01190 .3076 .7324 .0093 Ca .26006 .50 .7353 .0144 Wat1 .0138 .1717 .021 .428 .0244 Wat2 .3972 .50 .0226 .0244 Wat5 .50 .5242 .50 .467 .0600 Wat8 .1414 .1194 .3574 .0600