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 = 1.7 GPa ; _database_code_amcsd 0008872 _chemical_formula_sum 'Ca2 Al4 Si8 O33 H18' _cell_length_a 14.7934 _cell_length_b 13.0979 _cell_length_c 7.4420 _cell_angle_alpha 90 _cell_angle_beta 110.166 _cell_angle_gamma 90 _cell_volume 1353.584 _exptl_crystal_density_diffrn 2.353 _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 0.26900 0.50000 0.72200 0.05300 Al 0.13090 0.31120 0.73120 0.05300 Si1 0.24050 0.38230 0.16100 0.05300 Si2 0.07680 0.38590 0.31910 0.05300 O1 0.26500 0.50000 0.22400 0.05300 O2 0.21300 0.37100 0.93200 0.05300 O3 0.13800 0.39000 0.54700 0.05300 O4 0.14900 0.34400 0.21300 0.05300 O5 0.33300 0.31500 0.28300 0.05300 O6 0.03900 0.50000 0.24600 0.05300 O7 0.01400 0.30800 0.73500 0.05300 Wat1 0.00000 0.15400 0.00000 0.05300 Wat2 0.42000 0.50000 0.03900 0.05300 Wat5 0.50000 0.50000 0.50000 0.05300 Wat8 0.13400 0.12600 0.37800 0.05300