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 = 500 K
;
_database_code_amcsd 0007949
_chemical_formula_sum 'Si4 Al2 O14.53 Ca H4.24'
_cell_length_a 14.5601
_cell_length_b 13.1629
_cell_length_c 7.4291
_cell_angle_alpha 90
_cell_angle_beta 110.582
_cell_angle_gamma 90
_cell_volume 1332.929
_exptl_crystal_density_diffrn      2.208
_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   0.24080   0.38340   0.15090   1.00000   0.02026
Si2   0.07810   0.38620   0.31610   1.00000   0.02026
Al   0.13360   0.30820   0.73180   1.00000   0.02026
O1   0.26260   0.50000   0.22550   1.00000   0.02280
O2   0.21780   0.37930   0.92710   1.00000   0.02280
O3   0.14470   0.37840   0.54830   1.00000   0.02280
O4   0.14380   0.34680   0.18920   1.00000   0.02280
O5   0.33530   0.31690   0.26380   1.00000   0.02280
O6   0.04310   0.50000   0.26460   1.00000   0.02280
O7   0.01180   0.31130   0.72180   1.00000   0.02280
Ca   0.26450   0.50000   0.72610   1.00000   0.03293
OWat2   0.41320   0.48370  -0.14410   0.23000   0.05953
OWat5   0.50000   0.38530   0.50000   0.35000   0.05953
OWat8   0.10470   0.12370   0.26880   0.86000   0.05953
H21   0.46140   0.42920  -0.18850   0.15000   0.07219
H22   0.46040   0.43730  -0.06360   0.08000   0.07219
H5   0.45290   0.41530   0.38720   0.17000   0.07219
H82   0.12490   0.16580   0.37910   0.86000   0.07219
H83   0.09150   0.18310   0.15740   0.86000   0.07219