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 = 584 K
;
_database_code_amcsd 0007950
_chemical_formula_sum 'Si4 Al2 O14.13 Ca H3.68'
_cell_length_a 14.5279
_cell_length_b 13.1979
_cell_length_c 7.4370
_cell_angle_alpha 90
_cell_angle_beta 110.368
_cell_angle_gamma 90
_cell_volume 1336.798
_exptl_crystal_density_diffrn      2.167
_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   0.24060   0.38310   0.14910   1.00000   0.02280
Si2   0.07840   0.38600   0.31750   1.00000   0.02280
Al   0.13230   0.30820   0.73250   1.00000   0.02280
O1   0.26550   0.50000   0.21480   1.00000   0.02406
O2   0.21530   0.37870   0.92550   1.00000   0.02406
O3   0.14730   0.37850   0.54830   1.00000   0.02406
O4   0.14190   0.34800   0.19270   1.00000   0.02406
O5   0.33530   0.31780   0.25770   1.00000   0.02406
O6   0.04440   0.50000   0.26730   1.00000   0.02406
O7   0.01240   0.30970   0.72190   1.00000   0.02406
Ca   0.26340   0.50000   0.72210   1.00000   0.03673
OWat2   0.40520   0.47000  -0.15000   0.20000   0.07599
OWat5   0.50000   0.39000   0.50000   0.19000   0.07599
OWat8   0.10480   0.11860   0.27870   0.77000   0.07599
H21   0.45340   0.41600  -0.15500   0.13000   0.08866
H22   0.45240   0.42400  -0.02300   0.07000   0.08866
H5   0.45290   0.42000   0.38720   0.10000   0.08866
H82   0.12500   0.16070   0.38910   0.77000   0.08866
H83   0.09160   0.17800   0.16740   0.77000   0.08866