data_global _chemical_name_mineral 'Lizardite-2H2' loop_ _publ_author_name 'Brigatti M F' 'Galli E' 'Medici L' 'Poppi L' _journal_name_full 'American Mineralogist' _journal_volume 82 _journal_year 1997 _journal_page_first 931 _journal_page_last 935 _publ_section_title ; Crystal structure refinement of aluminian lizardite-2H2 ; _database_code_amcsd 0001942 _chemical_formula_sum 'Si1.42 Al1.12 Mg2.34 Fe.12 H4 O9' _cell_length_a 5.334 _cell_length_b 5.334 _cell_length_c 14.370 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 354.074 _exptl_crystal_density_diffrn 2.642 _symmetry_space_group_name_H-M 'P 63' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x-y,x,1/2+z' '-y,x-y,z' '-x,-y,1/2+z' '-x+y,-x,z' 'y,-x+y,1/2+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 Si1 0.00000 0.00000 0.13030 0.71000 ? Al1 0.00000 0.00000 0.13030 0.29000 ? Si2 0.66667 0.33333 0.12850 0.71000 ? Al2 0.66667 0.33333 0.12850 0.29000 ? Mg 0.66950 0.00200 0.32150 0.78000 ? Fe 0.66950 0.00200 0.32150 0.04000 ? Al 0.66950 0.00200 0.32150 0.18000 ? H4 0.30000 0.04000 0.45900 1.00000 0.04053 H5 0.33333 0.66667 0.17900 1.00000 0.04813 O1 0.00000 0.00000 0.24120 1.00000 ? O2 0.66667 0.33333 0.24710 1.00000 ? O3 0.78290 0.11790 0.08990 1.00000 ? O4 0.33560 0.00380 0.39160 1.00000 ? O5 0.33333 0.66667 0.24690 1.00000 ? loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Si1 0.01254 0.01254 0.02029 0.00633 0.00000 0.00000 Al1 0.01254 0.01254 0.02029 0.00633 0.00000 0.00000 Si2 0.00962 0.00962 0.01391 0.00481 0.00000 0.00000 Al2 0.00962 0.00962 0.01391 0.00481 0.00000 0.00000 Mg 0.01190 0.01456 0.01988 0.00975 -0.00013 -0.00242 Fe 0.01190 0.01456 0.01988 0.00975 -0.00013 -0.00242 Al 0.01190 0.01456 0.01988 0.00975 -0.00013 -0.00242 O1 0.01646 0.01646 0.04938 0.00836 0.00000 0.00000 O2 0.02913 0.02913 0.03295 0.01520 0.00000 0.00000 O3 0.02913 0.03546 0.03295 0.01899 -0.00380 -0.01012 O4 0.01899 0.02659 0.02532 0.00633 0.00114 -0.01140 O5 0.01520 0.01520 0.01015 0.00760 0.00000 0.00000