data_global
_chemical_name_mineral 'Laumontite'
loop_
_publ_author_name
'Stahl K'
'Artioli G'
'Hanson J C'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 23 
_journal_year 1996
_journal_page_first 328
_journal_page_last 336
_publ_section_title
;
 The dehydration process in the zeolite laumontite:
 a real-time synchrotron X-ray powder diffraction study
 Sample: T = 310 K
;
_database_code_amcsd 0007946
_chemical_formula_sum 'Si4 Al2 O17.77 Ca H9.4'
_cell_length_a 14.8066
_cell_length_b 13.1678
_cell_length_c 7.5389
_cell_angle_alpha 90
_cell_angle_beta 110.647
_cell_angle_gamma 90
_cell_volume 1375.453
_exptl_crystal_density_diffrn      2.415
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Si1   0.23600   0.38290   0.15080   1.00000   0.01393
Si2   0.08010   0.38170   0.32530   1.00000   0.01393
Al   0.13060   0.31060   0.73840   1.00000   0.01393
O1   0.26170   0.50000   0.22230   1.00000   0.01013
O2   0.20860   0.37380   0.93040   1.00000   0.01013
O3   0.13860   0.38090   0.55710   1.00000   0.01013
O4   0.14850   0.34440   0.20800   1.00000   0.01013
O5   0.33490   0.31410   0.26820   1.00000   0.01013
O6   0.04030   0.50000   0.24870   1.00000   0.01013
O7   0.01180   0.31410   0.73260   1.00000   0.01013
Ca   0.26660   0.50000   0.74610   1.00000   0.04559
OWat1   0.02500   0.17090   0.00000   1.00000   0.05066
OWat2   0.39910   0.50000   0.02310   1.00000   0.05066
OWat5   0.50000   0.48140   0.50000   0.89000   0.05066
OWat8   0.14000   0.11760   0.35200   0.94000   0.05066
H1   0.50660   0.29440   0.11500   0.87000   0.06333
H21   0.44730   0.44540   0.02870   0.67000   0.06333
H22   0.44630   0.45350   0.15360   0.36000   0.06333
H5   0.45290   0.51140   0.38720   0.45000   0.06333
H81   0.08980   0.08120   0.42750   0.47000   0.06333
H82   0.16070   0.16010   0.45970   0.94000   0.06333
H83   0.12730   0.17740   0.23800   0.94000   0.06333