data_global
_chemical_name_mineral 'Osumilite'
loop_
_publ_author_name
'Brown G E'
'Gibbs G V'
_journal_name_full 'American Mineralogist'
_journal_volume 54
_journal_year 1969
_journal_page_first 101
_journal_page_last 116
_publ_section_title
;
 Refinement of the crystal structure of osumilite
;
_database_code_amcsd 188
_chemical_formula_sum '(K.71 Na.28 Ca.01) Mg.92 Fe1.28 Mn.16 Si10.2 Al4.44 O30.996 H1.992'
_cell_length_a 10.155
_cell_length_b 10.155
_cell_length_c 14.284
_cell_angle_alpha 90.0
_cell_angle_beta 90.0
_cell_angle_gamma 120.0
_cell_volume 1275.676
_exptl_crystal_density_diffrn  2.711
_symmetry_space_group_name_H-M 'P 6/m c c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-x+y,1/2+z'
  'x,x-y,1/2-z'
  '-x+y,-x,-z'
  'x-y,x,z'
  '-y,-x,1/2+z'
  'y,x,1/2-z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x-y,-y,1/2+z'
  '-x+y,y,1/2-z'
  'x,y,-z'
  '-x,-y,z'
  'x,x-y,1/2+z'
  '-x,-x+y,1/2-z'
  'x-y,x,-z'
  '-x+y,-x,z'
  'y,x,1/2+z'
  '-y,-x,1/2-z'
  '-y,x-y,-z'
  'y,-x+y,z'
  '-x+y,y,1/2+z'
  'x-y,-y,1/2-z'
  '-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   0.0  0.0  0.25  0.71  0.04559
Na   0.0  0.0  0.25  0.28  0.04559
Ca   0.0  0.0  0.25  0.01  0.04559
Mg   0.333333  0.666667  0.25  0.46  0.0114
Fe   0.333333  0.666667  0.25  0.46  0.0114
Mn   0.333333  0.666667  0.25  0.08  0.0114
Si1   0.1037  0.3513  0.1085  0.85  0.01583
Al1   0.1037  0.3513  0.1085  0.15  0.01583
Al2   0.5  0.0  0.25  0.88  0.01659
Fe2   0.5  0.0  0.25  0.12  0.01659
O1   0.1216  0.4046  0.0  1.0  0.03166
O2   0.2142  0.2837  0.1316  1.0  0.0304
O3   0.1372  0.4913  0.1789  1.0  0.0228
Wat   0.031  0.114  0.0  0.166  0.11399