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 = 425 K
;
_database_code_amcsd 0007948
_chemical_formula_sum 'Si4 Al2 O16.1 Ca H6.1'
_cell_length_a 14.6967
_cell_length_b 13.0756
_cell_length_c 7.4700
_cell_angle_alpha 90
_cell_angle_beta 111.785
_cell_angle_gamma 90
_cell_volume 1332.977
_exptl_crystal_density_diffrn      2.343
_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   0.23790   0.38190   0.15900   1.00000   0.02026
Si2   0.07750   0.38450   0.32060   1.00000   0.02026
Al   0.13080   0.30900   0.73350   1.00000   0.02026
O1   0.25490   0.50000   0.21450   1.00000   0.01900
O2   0.21650   0.37420   0.92760   1.00000   0.01900
O3   0.14820   0.38110   0.55300   1.00000   0.01900
O4   0.14390   0.34460   0.19980   1.00000   0.01900
O5   0.33240   0.31760   0.27000   1.00000   0.01900
O6   0.04290   0.50000   0.25620   1.00000   0.01900
O7   0.00790   0.31230   0.72350   1.00000   0.01900
Ca   0.27200   0.50000   0.74910   1.00000   0.03166
OWat2   0.41820   0.47240   0.07800   0.93000   0.05066
OWat5   0.50000   0.34820   0.50000   0.26000   0.05066
OWat8   0.11330   0.11670   0.31150   0.99000   0.05066
H21   0.46640   0.41780   0.08360   0.61000   0.06333
H22   0.46540   0.42590   0.20850   0.33000   0.06333
H5   0.45290   0.37820   0.38720   0.13000   0.06333
H82   0.13350   0.15880   0.42180   0.99000   0.06333
H83   0.10010   0.17610   0.20010   0.99000   0.06333