The structure described by Er3Os4Si13 crystallizes in the cubic Pm-3n space group. Er(1) is bonded in a 16-coordinate geometry to four equivalent Os(1) and twelve equivalent Si(2) atoms. Os(1) is bonded in a 9-coordinate geometry to three equivalent Er(1) and six equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(2) is bonded in a 2-coordinate geometry to three equivalent Er(1), two equivalent Os(1), and one Si(1) atom. In the second Si site, Si(1) is bonded in a cuboctahedral geometry to twelve equivalent Si(2) atoms. is represented by the CIF card [CIF]
data_Er3Si13Os4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.800
_cell_length_b   8.800
_cell_length_c   8.800
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   681.392
_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
  Er  Er0  1  0.000  0.500  0.750  1.0
  Er  Er1  1  0.500  0.250  0.000  1.0
  Er  Er2  1  0.750  0.000  0.500  1.0
  Er  Er3  1  0.000  0.500  0.250  1.0
  Er  Er4  1  0.500  0.750  0.000  1.0
  Er  Er5  1  0.250  0.000  0.500  1.0
  Si  Si6  1  0.500  0.500  0.500  1.0
  Si  Si7  1  0.000  0.000  0.000  1.0
  Si  Si8  1  0.782  0.363  0.500  1.0
  Si  Si9  1  0.637  0.500  0.782  1.0
  Si  Si10  1  0.500  0.218  0.637  1.0
  Si  Si11  1  0.218  0.637  0.500  1.0
  Si  Si12  1  0.363  0.500  0.218  1.0
  Si  Si13  1  0.500  0.782  0.363  1.0
  Si  Si14  1  0.782  0.637  0.500  1.0
  Si  Si15  1  0.637  0.500  0.218  1.0
  Si  Si16  1  0.218  0.363  0.500  1.0
  Si  Si17  1  0.363  0.500  0.782  1.0
  Si  Si18  1  0.500  0.782  0.637  1.0
  Si  Si19  1  0.500  0.218  0.363  1.0
  Si  Si20  1  0.282  0.000  0.863  1.0
  Si  Si21  1  0.137  0.282  0.000  1.0
  Si  Si22  1  0.000  0.137  0.718  1.0
  Si  Si23  1  0.718  0.000  0.137  1.0
  Si  Si24  1  0.863  0.718  0.000  1.0
  Si  Si25  1  0.000  0.863  0.282  1.0
  Si  Si26  1  0.282  0.000  0.137  1.0
  Si  Si27  1  0.137  0.718  0.000  1.0
  Si  Si28  1  0.718  0.000  0.863  1.0
  Si  Si29  1  0.863  0.282  0.000  1.0
  Si  Si30  1  0.000  0.137  0.282  1.0
  Si  Si31  1  0.000  0.863  0.718  1.0
  Os  Os32  1  0.750  0.250  0.750  1.0
  Os  Os33  1  0.250  0.750  0.250  1.0
  Os  Os34  1  0.750  0.750  0.250  1.0
  Os  Os35  1  0.250  0.250  0.750  1.0
  Os  Os36  1  0.250  0.750  0.750  1.0
  Os  Os37  1  0.750  0.250  0.250  1.0
  Os  Os38  1  0.250  0.250  0.250  1.0
  Os  Os39  1  0.750  0.750  0.750  1.0
[/CIF]
.
The structure described by Er3Os4Si13 crystallizes in the cubic Pm-3n space group. Er(1) is bonded in a 16-coordinate geometry to four equivalent Os(1) and twelve equivalent Si(2) atoms. Os(1) is bonded in a 9-coordinate geometry to three equivalent Er(1) and six equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(2) is bonded in a 2-coordinate geometry to three equivalent Er(1), two equivalent Os(1), and one Si(1) atom. In the second Si site, Si(1) is bonded in a cuboctahedral geometry to twelve equivalent Si(2) atoms. is represented by the CIF card [CIF]
data_Er3Si13Os4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.800
_cell_length_b   8.800
_cell_length_c   8.800
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   681.392
_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
  Er  Er0  1  0.000  0.500  0.750  1.0
  Er  Er1  1  0.500  0.250  0.000  1.0
  Er  Er2  1  0.750  0.000  0.500  1.0
  Er  Er3  1  0.000  0.500  0.250  1.0
  Er  Er4  1  0.500  0.750  0.000  1.0
  Er  Er5  1  0.250  0.000  0.500  1.0
  Si  Si6  1  0.500  0.500  0.500  1.0
  Si  Si7  1  0.000  0.000  0.000  1.0
  Si  Si8  1  0.782  0.363  0.500  1.0
  Si  Si9  1  0.637  0.500  0.782  1.0
  Si  Si10  1  0.500  0.218  0.637  1.0
  Si  Si11  1  0.218  0.637  0.500  1.0
  Si  Si12  1  0.363  0.500  0.218  1.0
  Si  Si13  1  0.500  0.782  0.363  1.0
  Si  Si14  1  0.782  0.637  0.500  1.0
  Si  Si15  1  0.637  0.500  0.218  1.0
  Si  Si16  1  0.218  0.363  0.500  1.0
  Si  Si17  1  0.363  0.500  0.782  1.0
  Si  Si18  1  0.500  0.782  0.637  1.0
  Si  Si19  1  0.500  0.218  0.363  1.0
  Si  Si20  1  0.282  0.000  0.863  1.0
  Si  Si21  1  0.137  0.282  0.000  1.0
  Si  Si22  1  0.000  0.137  0.718  1.0
  Si  Si23  1  0.718  0.000  0.137  1.0
  Si  Si24  1  0.863  0.718  0.000  1.0
  Si  Si25  1  0.000  0.863  0.282  1.0
  Si  Si26  1  0.282  0.000  0.137  1.0
  Si  Si27  1  0.137  0.718  0.000  1.0
  Si  Si28  1  0.718  0.000  0.863  1.0
  Si  Si29  1  0.863  0.282  0.000  1.0
  Si  Si30  1  0.000  0.137  0.282  1.0
  Si  Si31  1  0.000  0.863  0.718  1.0
  Os  Os32  1  0.750  0.250  0.750  1.0
  Os  Os33  1  0.250  0.750  0.250  1.0
  Os  Os34  1  0.750  0.750  0.250  1.0
  Os  Os35  1  0.250  0.250  0.750  1.0
  Os  Os36  1  0.250  0.750  0.750  1.0
  Os  Os37  1  0.750  0.250  0.250  1.0
  Os  Os38  1  0.250  0.250  0.250  1.0
  Os  Os39  1  0.750  0.750  0.750  1.0
[/CIF]
.