data_global _chemical_name_mineral 'Itoigawaite' loop_ _publ_author_name 'Liebscher A' 'Dorsam G' 'Franz G' 'Wunder B' 'Gottschalk M' _journal_name_full 'American Mineralogist' _journal_volume 95 _journal_year 2010 _journal_page_first 724 _journal_page_last 735 _publ_section_title ; Crystal chemistry of synthetic lawsonite solid-solution series CaAl2 [(OH)2/(Si2O7)](H2O)-SrAl2[(OH)2/(Si2O7)](H2O) and the Cmcm-P2_1/m phase transition Note: Run #Pt100 ; _database_code_amcsd 0018945 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Sr Al2 Si2 O10 H4' _cell_length_a 5.4231 _cell_length_b 13.2761 _cell_length_c 5.8583 _cell_angle_alpha 90 _cell_angle_beta 124.42 _cell_angle_gamma 90 _cell_volume 347.936 _exptl_crystal_density_diffrn 3.453 _symmetry_space_group_name_H-M 'P 1 21/m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,z' '-x,1/2+y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Sr 0.34560 0.75000 0.68580 Al1 0.50000 0.00000 0.00000 Al2 0.50000 0.00000 0.50000 Si 0.96570 0.13050 0.99080 O1 0.94000 0.75000 0.93100 O2 0.76800 0.11040 0.66100 O3 0.78800 0.39670 0.12700 O4 0.28900 0.07220 0.14400 O-H5 0.29100 0.05670 0.64200 Wat6 0.73000 0.75000 0.29000