data_global _chemical_name_mineral 'Lepidolite-2M2' loop_ _publ_author_name 'Guggenheim S' _journal_name_full 'American Mineralogist' _journal_volume 66 _journal_year 1981 _journal_page_first 1221 _journal_page_last 1232 _publ_section_title ; Cation ordering in lepidolite type 2M(2) from Radkovice ; _database_code_amcsd 0000850 _chemical_formula_sum 'K Li1.24 Al1.158 Si3.492 O11 F' _cell_length_a 9.023 _cell_length_b 5.197 _cell_length_c 20.171 _cell_angle_alpha 90 _cell_angle_beta 99.48 _cell_angle_gamma 90 _cell_volume 932.952 _exptl_crystal_density_diffrn 2.649 _symmetry_space_group_name_H-M 'C 1 2/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '-x,y,1/2-z' '1/2-x,1/2+y,1/2-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_occupancy K 0.50000 0.40970 0.25000 1.00000 Li1 0.25000 0.25000 0.00000 1.00000 Al1 0.58561 0.24370 0.00005 0.32500 Li2 0.58561 0.24370 0.00005 0.12000 Si1 0.79426 0.40780 0.13397 0.87300 Al1 0.79426 0.40780 0.13397 0.12700 Si2 0.12556 0.41360 0.13394 0.87300 Al2 0.12556 0.41360 0.13394 0.12700 O1 0.76760 0.39370 0.05270 1.00000 O2 0.09050 0.42610 0.05283 1.00000 O3 0.44680 0.42910 0.04923 0.50000 F3 0.44680 0.42910 0.04923 0.50000 O4 0.70580 0.17740 0.16634 1.00000 O5 0.23800 0.17850 0.16219 1.00000 O6 0.97160 0.37870 0.16611 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 K 0.02203 0.02080 0.02326 0.00000 0.00296 0.00000 Li1 0.01204 0.00958 0.00983 0.00070 0.00359 0.00262 Al1 0.00843 0.00780 0.01003 -0.00047 0.00161 -0.00005 Li2 0.00843 0.00780 0.01003 -0.00047 0.00161 -0.00005 Si1 0.00730 0.00602 0.00880 -0.00056 0.00135 -0.00016 Al1 0.00730 0.00602 0.00880 -0.00056 0.00135 -0.00016 Si2 0.00658 0.00670 0.00874 -0.00019 0.00152 0.00000 Al2 0.00658 0.00670 0.00874 -0.00019 0.00152 0.00000 O1 0.02287 0.01163 0.00802 0.00141 0.00090 -0.00052 O2 0.01605 0.01806 0.00862 0.00539 0.00063 0.00016 O3 0.02408 0.04570 0.01223 -0.01945 0.00332 0.00105 F3 0.02408 0.04570 0.01223 -0.01945 0.00332 0.00105 O4 0.02046 0.01341 0.01805 -0.00750 0.00386 0.00000 O5 0.02167 0.01341 0.01464 0.00656 0.00063 -0.00136 O6 0.00963 0.02531 0.01725 -0.00070 0.00359 0.00105