The structure described by Y2CoSi2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 10-coordinate geometry to four equivalent Co(1), two equivalent Si(2), and five equivalent Si(1) atoms. In the second Y site, Y(2) is bonded in a 6-coordinate geometry to two equivalent Co(1), one Si(1), and five equivalent Si(2) atoms. Co(1) is bonded in a 10-coordinate geometry to two equivalent Y(2), four equivalent Y(1), one Si(2), and three equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 10-coordinate geometry to one Y(2), five equivalent Y(1), three equivalent Co(1), and one Si(1) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Y(1), five equivalent Y(2), one Co(1), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y2CoSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.626
_cell_length_b   5.626
_cell_length_c   10.006
_cell_angle_alpha   63.254
_cell_angle_beta   63.254
_cell_angle_gamma   43.169
_symmetry_Int_Tables_number   1
_cell_volume   189.575
_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
  Y  Y0  1  0.999  0.999  0.329  1.0
  Y  Y1  1  0.001  0.001  0.671  1.0
  Y  Y2  1  0.813  0.813  0.107  1.0
  Y  Y3  1  0.187  0.187  0.893  1.0
  Co  Co4  1  0.727  0.727  0.624  1.0
  Co  Co5  1  0.273  0.273  0.376  1.0
  Si  Si6  1  0.651  0.651  0.434  1.0
  Si  Si7  1  0.349  0.349  0.566  1.0
  Si  Si8  1  0.507  0.507  0.125  1.0
  Si  Si9  1  0.493  0.493  0.875  1.0
[/CIF]
.
The structure described by Y2CoSi2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 10-coordinate geometry to four equivalent Co(1), two equivalent Si(2), and five equivalent Si(1) atoms. In the second Y site, Y(2) is bonded in a 6-coordinate geometry to two equivalent Co(1), one Si(1), and five equivalent Si(2) atoms. Co(1) is bonded in a 10-coordinate geometry to two equivalent Y(2), four equivalent Y(1), one Si(2), and three equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 10-coordinate geometry to one Y(2), five equivalent Y(1), three equivalent Co(1), and one Si(1) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Y(1), five equivalent Y(2), one Co(1), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y2CoSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.626
_cell_length_b   5.626
_cell_length_c   10.006
_cell_angle_alpha   63.254
_cell_angle_beta   63.254
_cell_angle_gamma   43.169
_symmetry_Int_Tables_number   1
_cell_volume   189.575
_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
  Y  Y0  1  0.999  0.999  0.329  1.0
  Y  Y1  1  0.001  0.001  0.671  1.0
  Y  Y2  1  0.813  0.813  0.107  1.0
  Y  Y3  1  0.187  0.187  0.893  1.0
  Co  Co4  1  0.727  0.727  0.624  1.0
  Co  Co5  1  0.273  0.273  0.376  1.0
  Si  Si6  1  0.651  0.651  0.434  1.0
  Si  Si7  1  0.349  0.349  0.566  1.0
  Si  Si8  1  0.507  0.507  0.125  1.0
  Si  Si9  1  0.493  0.493  0.875  1.0
[/CIF]
.