The structure described by Co2Si3 is Magnesium tetraboride-like structured and crystallizes in the tetragonal P-4c2 space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 6-coordinate geometry to two equivalent Si(2) and four equivalent Si(1) atoms. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to two equivalent Si(2) and four equivalent Si(1) atoms. In the third Co site, Co(3) is bonded in a 8-coordinate geometry to four equivalent Si(1) and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 4-coordinate geometry to one Co(2), one Co(3), two equivalent Co(1), and one Si(2) atom. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to one Co(2), two equivalent Co(1), two equivalent Co(3), one Si(2), and two equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_Co2Si3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.391
_cell_length_b   5.391
_cell_length_c   8.432
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   245.092
_cell_formula_units_Z   4
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
  Co  Co0  1  0.500  0.000  0.130  1.0
  Co  Co1  1  0.500  0.000  0.630  1.0
  Co  Co2  1  0.000  0.500  0.870  1.0
  Co  Co3  1  0.000  0.500  0.370  1.0
  Co  Co4  1  0.500  0.500  0.250  1.0
  Co  Co5  1  0.500  0.500  0.750  1.0
  Co  Co6  1  0.000  0.000  0.500  1.0
  Co  Co7  1  0.000  0.000  0.000  1.0
  Si  Si8  1  0.346  0.205  0.409  1.0
  Si  Si9  1  0.654  0.795  0.409  1.0
  Si  Si10  1  0.346  0.795  0.909  1.0
  Si  Si11  1  0.654  0.205  0.909  1.0
  Si  Si12  1  0.205  0.654  0.591  1.0
  Si  Si13  1  0.795  0.346  0.591  1.0
  Si  Si14  1  0.795  0.654  0.091  1.0
  Si  Si15  1  0.205  0.346  0.091  1.0
  Si  Si16  1  0.172  0.172  0.750  1.0
  Si  Si17  1  0.828  0.828  0.750  1.0
  Si  Si18  1  0.172  0.828  0.250  1.0
  Si  Si19  1  0.828  0.172  0.250  1.0
[/CIF]
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The structure described by Co2Si3 is Magnesium tetraboride-like structured and crystallizes in the tetragonal P-4c2 space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 6-coordinate geometry to two equivalent Si(2) and four equivalent Si(1) atoms. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to two equivalent Si(2) and four equivalent Si(1) atoms. In the third Co site, Co(3) is bonded in a 8-coordinate geometry to four equivalent Si(1) and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 4-coordinate geometry to one Co(2), one Co(3), two equivalent Co(1), and one Si(2) atom. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to one Co(2), two equivalent Co(1), two equivalent Co(3), one Si(2), and two equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_Co2Si3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.391
_cell_length_b   5.391
_cell_length_c   8.432
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   245.092
_cell_formula_units_Z   4
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
  Co  Co0  1  0.500  0.000  0.130  1.0
  Co  Co1  1  0.500  0.000  0.630  1.0
  Co  Co2  1  0.000  0.500  0.870  1.0
  Co  Co3  1  0.000  0.500  0.370  1.0
  Co  Co4  1  0.500  0.500  0.250  1.0
  Co  Co5  1  0.500  0.500  0.750  1.0
  Co  Co6  1  0.000  0.000  0.500  1.0
  Co  Co7  1  0.000  0.000  0.000  1.0
  Si  Si8  1  0.346  0.205  0.409  1.0
  Si  Si9  1  0.654  0.795  0.409  1.0
  Si  Si10  1  0.346  0.795  0.909  1.0
  Si  Si11  1  0.654  0.205  0.909  1.0
  Si  Si12  1  0.205  0.654  0.591  1.0
  Si  Si13  1  0.795  0.346  0.591  1.0
  Si  Si14  1  0.795  0.654  0.091  1.0
  Si  Si15  1  0.205  0.346  0.091  1.0
  Si  Si16  1  0.172  0.172  0.750  1.0
  Si  Si17  1  0.828  0.828  0.750  1.0
  Si  Si18  1  0.172  0.828  0.250  1.0
  Si  Si19  1  0.828  0.172  0.250  1.0
[/CIF]
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