data_global _chemical_name_mineral 'Bikitaite' loop_ _publ_author_name 'Ferro O' 'Quartieri S' 'Vezzalini G' 'Fois E' 'Gamba A' 'Tabacchi G' _journal_name_full 'American Mineralogist' _journal_volume 87 _journal_year 2002 _journal_page_first 1415 _journal_page_last 1425 _publ_section_title ; High-pressure behaviour of bikitaite: An integrated theoretical and experimental approach Sample at P = 5.7 GPa ; _database_code_amcsd 0002911 _chemical_formula_sum 'Li Si2 Al O7 H2' _cell_length_a 8.4932 _cell_length_b 4.7773 _cell_length_c 7.2443 _cell_angle_alpha 90.804 _cell_angle_beta 114.794 _cell_angle_gamma 89.442 _cell_volume 266.811 _exptl_crystal_density_diffrn 2.541 _symmetry_space_group_name_H-M 'P 1' loop_ _space_group_symop_operation_xyz 'x,y,z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Li1 0.29820 0.31990 0.17510 Li2 0.65550 0.80820 0.80080 Si11 0.08750 0.79920 0.07230 Si12 0.08570 0.83840 0.48850 Si22 0.86060 0.33240 0.45130 Si23 0.59990 0.34980 0.04680 Al13 0.35000 0.85080 0.90690 Al21 0.86770 0.29570 0.87930 O11 0.24110 0.66960 0.02830 O12 0.06740 0.13780 0.03980 O13 0.14670 0.70720 0.30550 O14 0.00850 0.57450 0.56880 O15 0.23980 0.99200 0.66320 O16 0.45270 0.14300 0.07730 O21 0.69920 0.16970 0.93840 O22 0.89840 0.65340 0.93280 O23 0.80080 0.21020 0.61570 O24 0.93510 0.07100 0.35860 O25 0.70980 0.48960 0.25760 O26 0.50040 0.60640 0.89380 O17 0.40310 0.26130 0.46610 O27 0.55330 0.75820 0.50470 H11 0.33850 0.22450 0.54560 H12 0.47250 0.09070 0.48280 H21 0.62130 0.73970 0.42720 H22 0.49430 0.57690 0.48720