data_global
_chemical_name_mineral 'Laumontite'
loop_
_publ_author_name
'Lee Y'
'Hriljac J A'
'Vogt T'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 31 
_journal_year 2004
_journal_page_first 421
_journal_page_last 428
_publ_section_title
;
 Pressure-induced migration of zeolitic water in laumontite
 Sample: Pleasant Valley, Connecticut, NMNH R4159; P = 0.6 GPa
;
_database_code_amcsd 0008870
_chemical_formula_sum 'Ca2 Al4 Si8 O33 H18'
_cell_length_a 14.8795
_cell_length_b 13.1442
_cell_length_c 7.5078
_cell_angle_alpha 90
_cell_angle_beta 109.920
_cell_angle_gamma 90
_cell_volume 1380.515
_exptl_crystal_density_diffrn      2.307
_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_U_iso_or_equiv
Ca   0.27000   0.50000   0.73500   0.03600
Al   0.12780   0.30770   0.72820   0.03600
Si1   0.24070   0.38030   0.15870   0.03600
Si2   0.07670   0.38710   0.32330   0.03600
O1   0.26500   0.50000   0.19700   0.03600
O2   0.20900   0.36000   0.93300   0.03600
O3   0.13600   0.38900   0.55000   0.03600
O4   0.15000   0.34900   0.22000   0.03600
O5   0.33400   0.31700   0.28400   0.03600
O6   0.03700   0.50000   0.25000   0.03600
O7   0.01100   0.30700   0.73100   0.03600
Wat1   0.00000   0.15300   0.00000   0.03600
Wat2   0.40900   0.50000   0.01300   0.03600
Wat5   0.50000   0.50000   0.50000   0.03600
Wat8   0.14600   0.12200   0.36600   0.03600