The material structure described by SmCo9Si4 is Bergman Structure: Mg32(Al,Zn)49 Bergman-like structured and crystallizes in the tetragonal I4/mcm space group. Sm(1) is bonded in a 24-coordinate geometry to eight equivalent Co(1), eight equivalent Co(3), and eight equivalent Si(1) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 11-coordinate geometry to two equivalent Sm(1), one Co(2), two equivalent Co(1), two equivalent Co(3), and four equivalent Si(1) atoms. In the second Co site, Co(2) is bonded in a cuboctahedral geometry to four equivalent Co(1), four equivalent Co(3), and four equivalent Si(1) atoms. In the third Co site, Co(3) is bonded in a 12-coordinate geometry to two equivalent Sm(1), one Co(2), two equivalent Co(1), three equivalent Co(3), and four equivalent Si(1) atoms. Si(1) is bonded in a 11-coordinate geometry to two equivalent Sm(1), one Co(2), four equivalent Co(1), and four equivalent Co(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmCo9Si4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.925
_cell_length_b   7.926
_cell_length_c   7.928
_cell_angle_alpha   122.110
_cell_angle_beta   122.110
_cell_angle_gamma   86.393
_symmetry_Int_Tables_number   1
_cell_volume   340.110
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Sm  Sm0  1  0.250  0.250  1.000  1.0
  Sm  Sm1  1  0.750  0.750  1.000  1.0
  Co  Co2  1  0.052  0.552  0.243  1.0
  Co  Co3  1  0.691  0.191  0.242  1.0
  Co  Co4  1  1.000  0.500  0.500  1.0
  Co  Co5  1  0.932  0.196  0.128  1.0
  Co  Co6  1  0.804  0.932  0.736  1.0
  Co  Co7  1  0.448  0.691  0.500  1.0
  Co  Co8  1  0.068  0.804  0.872  1.0
  Co  Co9  1  0.809  0.052  0.500  1.0
  Co  Co10  1  0.552  0.309  0.500  1.0
  Co  Co11  1  0.948  0.448  0.757  1.0
  Co  Co12  1  0.191  0.948  0.500  1.0
  Co  Co13  1  0.304  0.568  0.872  1.0
  Co  Co14  1  0.568  0.696  0.264  1.0
  Co  Co15  1  0.432  0.304  0.736  1.0
  Co  Co16  1  0.196  0.068  0.264  1.0
  Co  Co17  1  0.696  0.432  0.128  1.0
  Co  Co18  1  0.500  0.000  0.500  1.0
  Co  Co19  1  0.309  0.809  0.758  1.0
  Si  Si20  1  0.043  0.208  0.500  1.0
  Si  Si21  1  0.208  0.708  0.165  1.0
  Si  Si22  1  0.792  0.292  0.835  1.0
  Si  Si23  1  0.457  0.957  0.165  1.0
  Si  Si24  1  0.543  0.043  0.835  1.0
  Si  Si25  1  0.957  0.792  0.500  1.0
  Si  Si26  1  0.292  0.457  0.500  1.0
  Si  Si27  1  0.708  0.543  0.500  1.0
[/CIF]
.
The material structure described by SmCo9Si4 is Bergman Structure: Mg32(Al,Zn)49 Bergman-like structured and crystallizes in the tetragonal I4/mcm space group. Sm(1) is bonded in a 24-coordinate geometry to eight equivalent Co(1), eight equivalent Co(3), and eight equivalent Si(1) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 11-coordinate geometry to two equivalent Sm(1), one Co(2), two equivalent Co(1), two equivalent Co(3), and four equivalent Si(1) atoms. In the second Co site, Co(2) is bonded in a cuboctahedral geometry to four equivalent Co(1), four equivalent Co(3), and four equivalent Si(1) atoms. In the third Co site, Co(3) is bonded in a 12-coordinate geometry to two equivalent Sm(1), one Co(2), two equivalent Co(1), three equivalent Co(3), and four equivalent Si(1) atoms. Si(1) is bonded in a 11-coordinate geometry to two equivalent Sm(1), one Co(2), four equivalent Co(1), and four equivalent Co(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmCo9Si4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.925
_cell_length_b   7.926
_cell_length_c   7.928
_cell_angle_alpha   122.110
_cell_angle_beta   122.110
_cell_angle_gamma   86.393
_symmetry_Int_Tables_number   1
_cell_volume   340.110
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Sm  Sm0  1  0.250  0.250  1.000  1.0
  Sm  Sm1  1  0.750  0.750  1.000  1.0
  Co  Co2  1  0.052  0.552  0.243  1.0
  Co  Co3  1  0.691  0.191  0.242  1.0
  Co  Co4  1  1.000  0.500  0.500  1.0
  Co  Co5  1  0.932  0.196  0.128  1.0
  Co  Co6  1  0.804  0.932  0.736  1.0
  Co  Co7  1  0.448  0.691  0.500  1.0
  Co  Co8  1  0.068  0.804  0.872  1.0
  Co  Co9  1  0.809  0.052  0.500  1.0
  Co  Co10  1  0.552  0.309  0.500  1.0
  Co  Co11  1  0.948  0.448  0.757  1.0
  Co  Co12  1  0.191  0.948  0.500  1.0
  Co  Co13  1  0.304  0.568  0.872  1.0
  Co  Co14  1  0.568  0.696  0.264  1.0
  Co  Co15  1  0.432  0.304  0.736  1.0
  Co  Co16  1  0.196  0.068  0.264  1.0
  Co  Co17  1  0.696  0.432  0.128  1.0
  Co  Co18  1  0.500  0.000  0.500  1.0
  Co  Co19  1  0.309  0.809  0.758  1.0
  Si  Si20  1  0.043  0.208  0.500  1.0
  Si  Si21  1  0.208  0.708  0.165  1.0
  Si  Si22  1  0.792  0.292  0.835  1.0
  Si  Si23  1  0.457  0.957  0.165  1.0
  Si  Si24  1  0.543  0.043  0.835  1.0
  Si  Si25  1  0.957  0.792  0.500  1.0
  Si  Si26  1  0.292  0.457  0.500  1.0
  Si  Si27  1  0.708  0.543  0.500  1.0
[/CIF]
.