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: data is reproduced from Jackson and West (1930)
;
_database_code_amcsd 0000025
_chemical_formula_sum 'K Mg3 (Si3 Al) O11 (F H)'
_cell_length_a 5.32
_cell_length_b 9.21
_cell_length_c 20.08
_cell_angle_alpha 90
_cell_angle_beta 95
_cell_angle_gamma 90
_cell_volume 980.120
_exptl_crystal_density_diffrn      2.841
_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   0.00000   0.08300   0.25000   1.00000
Mg1   0.25000   0.08300   0.00000   1.00000
Mg2   0.75000   0.25000   0.00000   1.00000
Si1  -0.03300  -0.25000   0.13500   0.75000
Si2  -0.03300   0.41700   0.13500   0.75000
Al1  -0.03300  -0.25000   0.13500   0.25000
Al2  -0.03300   0.41700   0.13500   0.25000
O1   0.22800   0.33300   0.16400   1.00000
O2   0.22800  -0.16700   0.16400   1.00000
O3   0.48000   0.08300   0.16400   1.00000
O4  -0.06200  -0.16700   0.05500   1.00000
O5  -0.06200   0.41700   0.05500   1.00000
O-H  -0.06200   0.08300   0.05800   0.50000
F  -0.06200   0.08300   0.05800   0.50000