data_9000834
_chemical_name 'Lepidolite-1M'
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 1M  from Radkovice
;
_chemical_formula_sum 'K Li1.56 Al1.808 Si3.492 O10 F2'
_cell_length_a 5.209
_cell_length_b 9.011
_cell_length_c 10.149
_cell_angle_alpha 90
_cell_angle_beta 100.77
_cell_angle_gamma 90
_cell_volume 467.986
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-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   0.00000   0.50000   0.00000   1.00000
Li1   0.00000   0.00000   0.50000   1.00000
Al2   0.00000   0.32890   0.50000   0.65000
Li2   0.00000   0.32890   0.50000   0.28000
Si   0.08100   0.16860   0.23203   0.87300
Al   0.08100   0.16860   0.23203   0.12700
O1   0.02180   0.00000   0.17500   1.00000
O2   0.32520   0.23190   0.16800   1.00000
O3   0.14180   0.17680   0.39450   1.00000
F   0.10760   0.50000   0.40170   1.00000