data_global
_chemical_name_mineral 'Gonnardite'
loop_
_publ_author_name
'Lee Y'
'Hriljac J A'
'Parise J B'
'Vogt T'
_journal_name_full 'American Mineralogist'
_journal_volume 91 
_journal_year 2006
_journal_page_first 247
_journal_page_last 251
_publ_section_title
;
 Pressure-induced hydration in zeolite tetranatrolite
 Note: P = 6.9 GPa
 Note: high-pressure superhydrated phase
;
_database_code_amcsd 0004013
_chemical_compound_source 'Mt. Saint-Hilaire, Quebec, Canada'
_chemical_formula_sum 'Na1.462 Ca.474 (Si2.685 Al2.315) O14 H8'
_cell_length_a 12.761
_cell_length_b 12.761
_cell_length_c 6.5127
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1060.548
_exptl_crystal_density_diffrn      2.646
_symmetry_space_group_name_H-M 'I -4 2 d'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  '1/2-y,-x,3/4+z'
  '-y,1/2-x,1/4+z'
  'y,-x,-z'
  '1/2+y,1/2-x,1/2-z'
  '-x,1/2+y,1/4-z'
  '1/2-x,+y,3/4-z'
  '-x,-y,z'
  '1/2-x,1/2-y,1/2+z'
  '1/2+y,x,3/4+z'
  '+y,1/2+x,1/4+z'
  '-y,x,-z'
  '1/2-y,1/2+x,1/2-z'
  'x,1/2-y,1/4-z'
  '1/2+x,-y,3/4-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
Na   0.69400   0.25000   0.12500   0.73100   0.02600
Ca   0.69400   0.25000   0.12500   0.23700   0.02600
Si1   0.00000   0.00000   0.00000   0.53700   0.02600
Al1   0.00000   0.00000   0.00000   0.46300   0.02600
Si2   0.05520   0.13280   0.62120   0.53700   0.02600
Al2   0.05520   0.13280   0.62120   0.46300   0.02600
O1   0.37900   0.25000   0.12500   1.00000   0.02600
O2   0.14400   0.05000   0.54200   1.00000   0.02600
O3   0.01700   0.11100   0.87300   1.00000   0.02600
Wat4   0.12500   0.25000   0.12500   1.00000   0.02600
Wat5   0.88900   0.25000   0.12500   1.00000   0.02600