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 = 9.0 GPa ; _database_code_amcsd 0002912 _chemical_formula_sum 'Li Si2 Al O7 H2' _cell_length_a 8.231 _cell_length_b 4.7320 _cell_length_c 7.1187 _cell_angle_alpha 92.80 _cell_angle_beta 114.99 _cell_angle_gamma 88.37 _cell_volume 251.000 _exptl_crystal_density_diffrn 2.701 _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 0.30020 0.28410 0.18520 Li2 0.64850 0.76210 0.79620 Si11 0.09220 0.76310 0.08530 Si12 0.09410 0.89150 0.49820 Si22 0.85440 0.38880 0.44990 Si23 0.59710 0.31430 0.03670 Al13 0.35050 0.82380 0.91890 Al21 0.86570 0.25670 0.86450 O11 0.24670 0.62160 0.03660 O12 0.07720 0.09770 0.02230 O13 0.14790 0.71890 0.32880 O14 -0.01240 0.66050 0.57070 O15 0.24890 0.01300 0.69710 O16 0.47820 0.09770 0.10100 O21 0.69940 0.13410 0.92760 O22 0.89810 0.62340 0.94680 O23 0.79910 0.22950 0.60010 O24 0.96050 0.14990 0.35800 O25 0.70130 0.50810 0.24800 O26 0.48190 0.55290 0.85590 O17 0.40540 0.28670 0.47420 O27 0.55630 0.78200 0.49810 H11 0.36070 0.30420 0.57850 H12 0.47420 0.10960 0.50300 H21 0.61820 0.80490 0.41660 H22 0.49510 0.60330 0.46040