The crystal structure described by Er3(RuSi3)4 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 16-coordinate geometry to four Ru(2,2,2); four equivalent Si(1); four equivalent Si(2); and four equivalent Si(3) atoms. In the second Er site, Er(2) is bonded in a 18-coordinate geometry to two equivalent Ru(2), four equivalent Ru(1), four equivalent Si(1), four equivalent Si(2), and four equivalent Si(4) atoms. There are seven inequivalent Ru sites. In the first Ru site, Ru(2) is bonded in a 5-coordinate geometry to one Er(2), four equivalent Er(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. In the second Ru site, Ru(2) is bonded in a 5-coordinate geometry to one Er(2), four equivalent Er(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. In the third Ru site, Ru(2) is bonded in a 5-coordinate geometry to one Er(2), four equivalent Er(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. In the fourth Ru site, Ru(1) is bonded in a 7-coordinate geometry to two equivalent Er(2); two equivalent Si(1); two equivalent Si(2); and three Si(4,4) atoms. In the fifth Ru site, Ru(1) is bonded in a 7-coordinate geometry to two equivalent Er(2); two equivalent Si(1); two equivalent Si(2); and three Si(4,4) atoms. In the sixth Ru site, Ru(2) is bonded in a 5-coordinate geometry to one Er(2), four equivalent Er(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. In the seventh Ru site, Ru(1) is bonded in a 7-coordinate geometry to two equivalent Er(2), two equivalent Si(1), two equivalent Si(2), and three equivalent Si(4) atoms. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to one Er(2), two equivalent Er(1), one Ru(1), one Ru(2), one Si(3), one Si(4), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to one Er(2), two equivalent Er(1), one Ru(1), one Ru(2), one Si(3), one Si(4), and two equivalent Si(1) atoms. In the third Si site, Si(4) is bonded in a 9-coordinate geometry to two equivalent Er(2); three Ru(1,1,1); two equivalent Si(1); and two equivalent Si(2) atoms. In the fourth Si site, Si(3) is bonded in a 9-coordinate geometry to four equivalent Er(1), one Ru(2), two equivalent Si(1), and two equivalent Si(2) atoms. In the fifth Si site, Si(4) is bonded in a 9-coordinate geometry to two equivalent Er(2), three equivalent Ru(1), two equivalent Si(1), and two equivalent Si(2) atoms. is represented by the CIF file [CIF]
data_Er3(Si3Ru)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.053
_cell_length_b   10.053
_cell_length_c   8.076
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   132.668
_symmetry_Int_Tables_number   1
_cell_volume   600.076
_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  0.497  0.997  0.250  1.0
  Er  Er1  1  0.003  0.503  0.750  1.0
  Er  Er2  1  0.503  0.003  0.750  1.0
  Er  Er3  1  0.997  0.497  0.250  1.0
  Er  Er4  1  0.500  0.500  0.500  1.0
  Er  Er5  1  0.000  0.000  0.000  1.0
  Si  Si6  1  0.390  0.155  0.005  1.0
  Si  Si7  1  0.655  0.890  0.495  1.0
  Si  Si8  1  0.110  0.345  0.505  1.0
  Si  Si9  1  0.845  0.610  0.995  1.0
  Si  Si10  1  0.610  0.845  0.995  1.0
  Si  Si11  1  0.345  0.110  0.505  1.0
  Si  Si12  1  0.890  0.655  0.495  1.0
  Si  Si13  1  0.155  0.390  0.005  1.0
  Si  Si14  1  0.613  0.379  0.227  1.0
  Si  Si15  1  0.879  0.113  0.273  1.0
  Si  Si16  1  0.887  0.121  0.727  1.0
  Si  Si17  1  0.621  0.387  0.773  1.0
  Si  Si18  1  0.387  0.621  0.773  1.0
  Si  Si19  1  0.121  0.887  0.727  1.0
  Si  Si20  1  0.706  0.294  0.000  1.0
  Si  Si21  1  0.794  0.206  0.500  1.0
  Si  Si22  1  0.294  0.706  0.000  1.0
  Si  Si23  1  0.206  0.794  0.500  1.0
  Si  Si24  1  0.166  0.166  0.334  1.0
  Si  Si25  1  0.666  0.666  0.166  1.0
  Si  Si26  1  0.334  0.334  0.834  1.0
  Si  Si27  1  0.834  0.834  0.666  1.0
  Si  Si28  1  0.379  0.613  0.227  1.0
  Si  Si29  1  0.113  0.879  0.273  1.0
  Ru  Ru30  1  0.627  0.627  0.873  1.0
  Ru  Ru31  1  0.127  0.127  0.627  1.0
  Ru  Ru32  1  0.873  0.873  0.373  1.0
  Ru  Ru33  1  0.373  0.373  0.127  1.0
  Ru  Ru34  1  0.331  0.669  0.500  1.0
  Ru  Ru35  1  0.169  0.831  0.000  1.0
  Ru  Ru36  1  0.669  0.331  0.500  1.0
  Ru  Ru37  1  0.831  0.169  0.000  1.0
[/CIF]
.
The crystal structure described by Er3(RuSi3)4 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 16-coordinate geometry to four Ru(2,2,2); four equivalent Si(1); four equivalent Si(2); and four equivalent Si(3) atoms. In the second Er site, Er(2) is bonded in a 18-coordinate geometry to two equivalent Ru(2), four equivalent Ru(1), four equivalent Si(1), four equivalent Si(2), and four equivalent Si(4) atoms. There are seven inequivalent Ru sites. In the first Ru site, Ru(2) is bonded in a 5-coordinate geometry to one Er(2), four equivalent Er(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. In the second Ru site, Ru(2) is bonded in a 5-coordinate geometry to one Er(2), four equivalent Er(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. In the third Ru site, Ru(2) is bonded in a 5-coordinate geometry to one Er(2), four equivalent Er(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. In the fourth Ru site, Ru(1) is bonded in a 7-coordinate geometry to two equivalent Er(2); two equivalent Si(1); two equivalent Si(2); and three Si(4,4) atoms. In the fifth Ru site, Ru(1) is bonded in a 7-coordinate geometry to two equivalent Er(2); two equivalent Si(1); two equivalent Si(2); and three Si(4,4) atoms. In the sixth Ru site, Ru(2) is bonded in a 5-coordinate geometry to one Er(2), four equivalent Er(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. In the seventh Ru site, Ru(1) is bonded in a 7-coordinate geometry to two equivalent Er(2), two equivalent Si(1), two equivalent Si(2), and three equivalent Si(4) atoms. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to one Er(2), two equivalent Er(1), one Ru(1), one Ru(2), one Si(3), one Si(4), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to one Er(2), two equivalent Er(1), one Ru(1), one Ru(2), one Si(3), one Si(4), and two equivalent Si(1) atoms. In the third Si site, Si(4) is bonded in a 9-coordinate geometry to two equivalent Er(2); three Ru(1,1,1); two equivalent Si(1); and two equivalent Si(2) atoms. In the fourth Si site, Si(3) is bonded in a 9-coordinate geometry to four equivalent Er(1), one Ru(2), two equivalent Si(1), and two equivalent Si(2) atoms. In the fifth Si site, Si(4) is bonded in a 9-coordinate geometry to two equivalent Er(2), three equivalent Ru(1), two equivalent Si(1), and two equivalent Si(2) atoms. is represented by the CIF file [CIF]
data_Er3(Si3Ru)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.053
_cell_length_b   10.053
_cell_length_c   8.076
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   132.668
_symmetry_Int_Tables_number   1
_cell_volume   600.076
_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  0.497  0.997  0.250  1.0
  Er  Er1  1  0.003  0.503  0.750  1.0
  Er  Er2  1  0.503  0.003  0.750  1.0
  Er  Er3  1  0.997  0.497  0.250  1.0
  Er  Er4  1  0.500  0.500  0.500  1.0
  Er  Er5  1  0.000  0.000  0.000  1.0
  Si  Si6  1  0.390  0.155  0.005  1.0
  Si  Si7  1  0.655  0.890  0.495  1.0
  Si  Si8  1  0.110  0.345  0.505  1.0
  Si  Si9  1  0.845  0.610  0.995  1.0
  Si  Si10  1  0.610  0.845  0.995  1.0
  Si  Si11  1  0.345  0.110  0.505  1.0
  Si  Si12  1  0.890  0.655  0.495  1.0
  Si  Si13  1  0.155  0.390  0.005  1.0
  Si  Si14  1  0.613  0.379  0.227  1.0
  Si  Si15  1  0.879  0.113  0.273  1.0
  Si  Si16  1  0.887  0.121  0.727  1.0
  Si  Si17  1  0.621  0.387  0.773  1.0
  Si  Si18  1  0.387  0.621  0.773  1.0
  Si  Si19  1  0.121  0.887  0.727  1.0
  Si  Si20  1  0.706  0.294  0.000  1.0
  Si  Si21  1  0.794  0.206  0.500  1.0
  Si  Si22  1  0.294  0.706  0.000  1.0
  Si  Si23  1  0.206  0.794  0.500  1.0
  Si  Si24  1  0.166  0.166  0.334  1.0
  Si  Si25  1  0.666  0.666  0.166  1.0
  Si  Si26  1  0.334  0.334  0.834  1.0
  Si  Si27  1  0.834  0.834  0.666  1.0
  Si  Si28  1  0.379  0.613  0.227  1.0
  Si  Si29  1  0.113  0.879  0.273  1.0
  Ru  Ru30  1  0.627  0.627  0.873  1.0
  Ru  Ru31  1  0.127  0.127  0.627  1.0
  Ru  Ru32  1  0.873  0.873  0.373  1.0
  Ru  Ru33  1  0.373  0.373  0.127  1.0
  Ru  Ru34  1  0.331  0.669  0.500  1.0
  Ru  Ru35  1  0.169  0.831  0.000  1.0
  Ru  Ru36  1  0.669  0.331  0.500  1.0
  Ru  Ru37  1  0.831  0.169  0.000  1.0
[/CIF]
.