data_9009219
_chemical_name 'Xifengite'
loop_
_publ_author_name
'Weill A R'
_journal_name_full "Nature"
_journal_volume 152
_journal_year 1943
_journal_page_first 413
_journal_page_last 413
_publ_section_title
;
 Structure of the eta phase of the iron-silicon system
;
_chemical_formula_sum 'Fe5 Si3'
_cell_length_a 6.7416
_cell_length_b 6.7416
_cell_length_c 4.7079
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 185.304
_symmetry_space_group_name_H-M 'P 63/m c m'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-x+y,z'
  'x,x-y,-z'
  '-x+y,-x,1/2-z'
  'x-y,x,1/2+z'
  '-y,-x,1/2+z'
  'y,x,1/2-z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x-y,-y,z'
  '-x+y,y,-z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  'x,x-y,1/2+z'
  '-x,-x+y,1/2-z'
  'x-y,x,-z'
  '-x+y,-x,z'
  'y,x,z'
  '-y,-x,-z'
  '-y,x-y,1/2-z'
  'y,-x+y,1/2+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
Fe1   0.33333   0.66667   0.00000
Fe2   0.23000   0.00000   0.25000
Si   0.60000   0.00000   0.25000