The structure described by Y5Sc5Si6 crystallizes in the orthorhombic Amm2 space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 5-coordinate geometry to one Si(1), two equivalent Si(2), and two equivalent Si(4) atoms. In the second Y site, Y(2) is bonded in a 5-coordinate geometry to one Si(3), two equivalent Si(1), and two equivalent Si(4) atoms. In the third Y site, Y(3) is bonded in a 5-coordinate geometry to one Si(3), two equivalent Si(2), and two equivalent Si(4) atoms. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 6-coordinate geometry to one Si(1), one Si(3), two equivalent Si(2), and two equivalent Si(4) atoms. In the second Sc site, Sc(2) is bonded in a 3-coordinate geometry to one Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Y(1), two equivalent Y(2), one Sc(2), and four equivalent Sc(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Y(1), two equivalent Y(3), one Sc(2), and four equivalent Sc(1) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to one Y(2), two equivalent Y(3), two equivalent Sc(2), and four equivalent Sc(1) atoms. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to one Y(2), two equivalent Y(1), two equivalent Y(3), and four equivalent Sc(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y5Sc5Si6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.229
_cell_length_b   8.229
_cell_length_c   6.026
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.650
_symmetry_Int_Tables_number   1
_cell_volume   354.639
_cell_formula_units_Z   1
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  0.246  1.000  0.500  1.0
  Y  Y1  1  1.000  0.246  0.500  1.0
  Y  Y2  1  0.249  0.249  0.000  1.0
  Y  Y3  1  0.754  0.998  0.000  1.0
  Y  Y4  1  0.998  0.754  0.000  1.0
  Sc  Sc5  1  0.667  0.336  0.251  1.0
  Sc  Sc6  1  0.336  0.667  0.251  1.0
  Sc  Sc7  1  0.336  0.667  0.749  1.0
  Sc  Sc8  1  0.667  0.336  0.749  1.0
  Sc  Sc9  1  0.749  0.749  0.500  1.0
  Si  Si10  1  0.404  0.404  0.500  1.0
  Si  Si11  1  0.604  0.993  0.500  1.0
  Si  Si12  1  0.993  0.604  0.500  1.0
  Si  Si13  1  0.601  0.601  0.000  1.0
  Si  Si14  1  0.398  0.999  0.000  1.0
  Si  Si15  1  0.999  0.398  0.000  1.0
[/CIF]
.
The structure described by Y5Sc5Si6 crystallizes in the orthorhombic Amm2 space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 5-coordinate geometry to one Si(1), two equivalent Si(2), and two equivalent Si(4) atoms. In the second Y site, Y(2) is bonded in a 5-coordinate geometry to one Si(3), two equivalent Si(1), and two equivalent Si(4) atoms. In the third Y site, Y(3) is bonded in a 5-coordinate geometry to one Si(3), two equivalent Si(2), and two equivalent Si(4) atoms. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 6-coordinate geometry to one Si(1), one Si(3), two equivalent Si(2), and two equivalent Si(4) atoms. In the second Sc site, Sc(2) is bonded in a 3-coordinate geometry to one Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Y(1), two equivalent Y(2), one Sc(2), and four equivalent Sc(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Y(1), two equivalent Y(3), one Sc(2), and four equivalent Sc(1) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to one Y(2), two equivalent Y(3), two equivalent Sc(2), and four equivalent Sc(1) atoms. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to one Y(2), two equivalent Y(1), two equivalent Y(3), and four equivalent Sc(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y5Sc5Si6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.229
_cell_length_b   8.229
_cell_length_c   6.026
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.650
_symmetry_Int_Tables_number   1
_cell_volume   354.639
_cell_formula_units_Z   1
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  0.246  1.000  0.500  1.0
  Y  Y1  1  1.000  0.246  0.500  1.0
  Y  Y2  1  0.249  0.249  0.000  1.0
  Y  Y3  1  0.754  0.998  0.000  1.0
  Y  Y4  1  0.998  0.754  0.000  1.0
  Sc  Sc5  1  0.667  0.336  0.251  1.0
  Sc  Sc6  1  0.336  0.667  0.251  1.0
  Sc  Sc7  1  0.336  0.667  0.749  1.0
  Sc  Sc8  1  0.667  0.336  0.749  1.0
  Sc  Sc9  1  0.749  0.749  0.500  1.0
  Si  Si10  1  0.404  0.404  0.500  1.0
  Si  Si11  1  0.604  0.993  0.500  1.0
  Si  Si12  1  0.993  0.604  0.500  1.0
  Si  Si13  1  0.601  0.601  0.000  1.0
  Si  Si14  1  0.398  0.999  0.000  1.0
  Si  Si15  1  0.999  0.398  0.000  1.0
[/CIF]
.