data_global _chemical_name_mineral 'Lepidolite' loop_ _publ_author_name 'Brown B E' _journal_name_full 'American Mineralogist' _journal_volume 63 _journal_year 1978 _journal_page_first 332 _journal_page_last 336 _publ_section_title ; The crystal structure of a 3T lepidolite ; _database_code_amcsd 0000640 _chemical_compound_source 'Coolgardie, Australia' _chemical_formula_sum 'K.667 Li1.153 Al1.107 Mn.037 Si2.334 O7.004 F H1.334' _cell_length_a 5.200 _cell_length_b 5.200 _cell_length_c 29.76 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 696.900 _exptl_crystal_density_diffrn 1.887 _symmetry_space_group_name_H-M 'P 31 1 2' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x+y,y,1/3-z' '-y,x-y,1/3+z' '-y,-x,2/3-z' '-x+y,-x,2/3+z' 'x,x-y,-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 K 0.11110 0.88890 0.83333 0.66700 0.02432 Li1 0.42100 0.57900 0.33333 0.46700 0.02153 Al1 0.42100 0.57900 0.33333 0.20000 0.02153 Li2 0.77900 0.22100 0.33333 0.59300 0.00038 Mn2 0.77900 0.22100 0.33333 0.03700 0.00038 Al3 0.12100 0.87900 0.33333 0.57300 0.00659 Li3 0.12100 0.87900 0.33333 0.09300 0.00659 Si1 0.78670 0.21270 -0.08900 0.50000 0.00291 Al1 0.78670 0.21270 -0.08900 0.16700 0.00291 Si2 0.45720 0.55550 -0.09030 0.66700 0.02014 Oa 0.77700 0.17200 -0.03490 0.66700 0.00760 Ob 0.44600 0.57100 -0.03560 0.66700 0.01140 O-H 0.09000 0.86400 -0.03330 0.66700 0.00545 Oc 0.65400 0.87400 -0.11160 0.66700 0.01773 Od 0.12000 0.42600 -0.10760 0.66700 0.02153 Oe 0.58300 0.35000 -0.11210 0.16700 0.02786 F 0.58300 0.35000 -0.11210 0.50000 0.02786