data_global
_chemical_name_mineral 'Phlogopite'
loop_
_publ_author_name
'Hendricks S B'
'Jefferson M E'
_journal_name_full 'American Mineralogist'
_journal_volume 24 
_journal_year 1939
_journal_page_first 729
_journal_page_last 771
_publ_section_title
;
 Polymorphism of the micas with optical measurements
 Note: Biotite group
;
_database_code_amcsd 0000026
_chemical_formula_sum 'K Mg3 (Si3 Al) O11 (F H)'
_cell_length_a 5.3
_cell_length_b 5.3
_cell_length_c 30.0
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 729.800
_exptl_crystal_density_diffrn      2.862
_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
K   0.11111   0.05560   0.00000   1.00000
Mg1   0.11111   0.22222   0.16667   1.00000
Mg3  -0.22222  -0.44444   0.16667   1.00000
Mg3   0.44444   0.88889   0.16667   1.00000
Si1  -0.22000   0.22000   0.07800   0.75000
Si2   0.44000  -0.44000   0.07800   0.75000
Al1  -0.22000   0.22000   0.07800   0.25000
Al2   0.44000  -0.44000   0.07800   0.25000
O1   0.11000   0.39000   0.06000   1.00000
O2  -0.39000  -0.11000   0.06000   1.00000
O3  -0.39000   0.39000   0.06000   1.00000
O4  -0.22000   0.22000   0.13000   1.00000
O5   0.44000  -0.44000   0.13000   1.00000
O-H   0.11000  -0.11000   0.13000   0.50000
F   0.11000  -0.11000   0.13000   0.50000