data_global
_chemical_name_mineral 'Muscovite'
loop_
_publ_author_name
'Birle J'
'Tettenhorst R'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 36 
_journal_year 1968
_journal_page_first 883
_journal_page_last 886
_publ_section_title
;
 Refined Muscovite structure
 _cod_database_code 1100010
;
_database_code_amcsd 0018219
_chemical_formula_sum 'Al2.88 Fe.12 O12 Si3 K'
_cell_length_a 5.194
_cell_length_b 8.996
_cell_length_c 20.09599
_cell_angle_alpha 90
_cell_angle_beta 95.18
_cell_angle_gamma 90
_cell_volume 935.155
_exptl_crystal_density_diffrn      2.839
_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
Al1   0.25140   0.08480   0.00040   0.94000
Fe1   0.25140   0.08480   0.00040   0.06000
O1   0.46070   0.94400   0.05280   1.00000
O2   0.37940   0.25300   0.05340   1.00000
O3   0.45850   0.56080   0.05090   1.00000
Si1   0.46590   0.92860   0.13520   0.75000
Si2   0.45150   0.25760   0.13510   0.75000
Al2   0.46590   0.92860   0.13520   0.25000
Al3   0.45150   0.25760   0.13510   0.25000
O4   0.41380   0.09510   0.16800   1.00000
O5   0.25080   0.80820   0.15670   1.00000
O6   0.25520   0.37100   0.16850   1.00000
K1   0.00000   0.09910   0.25000   1.00000