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 = 5.4 GPa on release Note: high-pressure superhydrated phase ; _database_code_amcsd 0004012 _chemical_compound_source 'Mt. Saint-Hilaire, Quebec, Canada' _chemical_formula_sum 'Na1.462 Ca.474 (Si2.685 Al2.315) O14 H8' _cell_length_a 12.910 _cell_length_b 12.910 _cell_length_c 6.540 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1090.009 _exptl_crystal_density_diffrn 2.575 _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 0.69100 0.25000 0.12500 0.73100 0.02200 Ca 0.69100 0.25000 0.12500 0.23700 0.02200 Si1 0.00000 0.00000 0.00000 0.53700 0.02200 Al1 0.00000 0.00000 0.00000 0.46300 0.02200 Si2 0.05750 0.13510 0.62350 0.53700 0.02200 Al2 0.05750 0.13510 0.62350 0.46300 0.02200 O1 0.37900 0.25000 0.12500 1.00000 0.02200 O2 0.13800 0.04500 0.53100 1.00000 0.02200 O3 0.02000 0.11000 0.87300 1.00000 0.02200 Wat4 0.13100 0.25000 0.12500 1.00000 0.02200 Wat5 0.89800 0.25000 0.12500 1.00000 0.02200