data_1008896
_chemical_name_systematic          'Samarium cobalt silicide (1/9/2)'
_chemical_formula_structural       'Sm Co9 Si2'
_chemical_formula_sum              'Co9 Si2 Sm'
_publ_section_title
;
Synthesis, structural and magnetic properties of the interstitial
compounds R Co9 Si2 Cx with R = Sm, Nd, Y and 0<x<1.8
;
loop_
_publ_author_name
  'Garcia-Landa, B'
  'Fruchart, D'
  'Gignoux, D'
  'Skolozdra, R'
  'Soubeyroux, J L'
_journal_name_full                 'Journal of Alloys Compd.'
_journal_coden_ASTM                JALCEU
_journal_volume                    278
_journal_year                      1998
_journal_page_first                6
_journal_page_last                 16
_cell_length_a                     9.752(2)
_cell_length_b                     9.752(2)
_cell_length_c                     6.304(2)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       599.5
_cell_formula_units_Z              4
_symmetry_space_group_name_H-M     'I 41/a m d Z'
_symmetry_Int_Tables_number        141
_symmetry_cell_setting             tetragonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  'x,1/2-y,z'
  '1/4+y,1/4+x,3/4+z'
  '1/4+y,1/4-x,3/4+z'
  '-x,y,z'
  '-x,1/2-y,z'
  '3/4-y,1/4+x,3/4+z'
  '3/4-y,1/4-x,3/4+z'
  '-x,-y,-z'
  '-x,1/2+y,-z'
  '3/4-y,3/4-x,1/4-z'
  '3/4-y,3/4+x,1/4-z'
  'x,-y,-z'
  'x,1/2+y,-z'
  '1/4+y,3/4-x,1/4-z'
  '1/4+y,3/4+x,1/4-z'
  '1/2+x,1/2+y,1/2+z'
  '1/2+x,-y,1/2+z'
  '3/4+y,3/4+x,1/4+z'
  '3/4+y,3/4-x,1/4+z'
  '1/2-x,1/2+y,1/2+z'
  '1/2-x,-y,1/2+z'
  '1/4-y,3/4+x,1/4+z'
  '1/4-y,3/4-x,1/4+z'
  '1/2-x,1/2-y,1/2-z'
  '1/2-x,y,1/2-z'
  '1/4-y,1/4-x,3/4-z'
  '1/4-y,1/4+x,3/4-z'
  '1/2+x,1/2-y,1/2-z'
  '1/2+x,y,1/2-z'
  '3/4+y,1/4-x,3/4-z'
  '3/4+y,1/4+x,3/4-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Sm0    0.000
  Co0    0.000
  Si0    0.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  Sm1   Sm0    4 a 0. 0.25 0.875 1.  0 d
  Co1   Co0    4 b 0. 0.25 0.375 1.  0 d
  Co2   Co0   32 i 0.1229(3) 0.4559(3) 0.1835(4) 1.  0 d
  Si1   Si0    8 d 0. 0. 0.5 1.  0 d
_refine_ls_R_factor_all            0.087