The structure described by Nd20(RuSi3)3 crystallizes in the orthorhombic Amm2 space group. There are eight inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 6-coordinate geometry to one Ru(2), one Ru(3), two equivalent Si(2), and two equivalent Si(4) atoms. In the second Nd site, Nd(2) is bonded to one Ru(1), one Si(1), two equivalent Si(3), and two equivalent Si(4) atoms to form distorted NdSi5Ru octahedra that share corners with four equivalent Nd(2)Si5Ru octahedra, corners with two equivalent Nd(3)Si5 trigonal bipyramids, corners with four equivalent Nd(7)Si4Ru trigonal bipyramids, faces with two equivalent Nd(3)Si5 trigonal bipyramids, and faces with four equivalent Nd(7)Si4Ru trigonal bipyramids. The corner-sharing octahedral tilt angles range from 54-59°. In the third Nd site, Nd(3) is bonded to one Si(1), two equivalent Si(3), and two equivalent Si(4) atoms to form distorted NdSi5 trigonal bipyramids that share corners with two equivalent Nd(2)Si5Ru octahedra, corners with four equivalent Nd(7)Si4Ru trigonal bipyramids, edges with four equivalent Nd(7)Si4Ru trigonal bipyramids, faces with two equivalent Nd(2)Si5Ru octahedra, and  a faceface with one Nd(3)Si5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 43°. In the fourth Nd site, Nd(4) is bonded in a 5-coordinate geometry to one Ru(3), two equivalent Si(2), and two equivalent Si(4) atoms. In the fifth Nd site, Nd(5) is bonded in a 5-coordinate geometry to one Ru(1), two equivalent Si(3), and two equivalent Si(4) atoms. In the sixth Nd site, Nd(6) is bonded in a 5-coordinate geometry to one Ru(2), two equivalent Si(2), and two equivalent Si(4) atoms. In the seventh Nd site, Nd(7) is bonded to one Ru(1), one Si(1), one Si(3), and two equivalent Si(4) atoms to form distorted NdSi4Ru trigonal bipyramids that share corners with two equivalent Nd(2)Si5Ru octahedra, corners with two equivalent Nd(7)Si4Ru trigonal bipyramids, corners with two equivalent Nd(3)Si5 trigonal bipyramids, edges with two equivalent Nd(7)Si4Ru trigonal bipyramids, edges with two equivalent Nd(3)Si5 trigonal bipyramids, faces with two equivalent Nd(2)Si5Ru octahedra, and  a faceface with one Nd(7)Si4Ru trigonal bipyramid. The corner-sharing octahedral tilt angles are 42°. In the eighth Nd site, Nd(8) is bonded in a 5-coordinate geometry to one Ru(2), one Ru(3), one Si(2), and two equivalent Si(4) atoms. There are three inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 9-coordinate geometry to two equivalent Nd(2), two equivalent Nd(5), four equivalent Nd(7), and one Si(1) atom. In the second Ru site, Ru(2) is bonded in a 8-coordinate geometry to two equivalent Nd(1), two equivalent Nd(6), and four equivalent Nd(8) atoms. In the third Ru site, Ru(3) is bonded in a 8-coordinate geometry to two equivalent Nd(1), two equivalent Nd(4), and four equivalent Nd(8) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Nd(2), two equivalent Nd(3), four equivalent Nd(7), and one Ru(1) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Nd(1), two equivalent Nd(4), two equivalent Nd(6), two equivalent Nd(8), and one Si(2) atom. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Nd(2), two equivalent Nd(3), two equivalent Nd(5), two equivalent Nd(7), and one Si(3) atom. In the fourth Si site, Si(4) is bonded in a 10-coordinate geometry to one Nd(1), one Nd(2), one Nd(3), one Nd(4), one Nd(5), one Nd(6), two equivalent Nd(7), and two equivalent Nd(8) atoms. is represented by the CIF card [CIF]
data_Nd20(Si3Ru)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.814
_cell_length_b   7.814
_cell_length_c   13.871
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   91.164
_symmetry_Int_Tables_number   1
_cell_volume   846.871
_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
  Nd  Nd0  1  0.995  0.499  0.000  1.0
  Nd  Nd1  1  0.492  0.994  0.500  1.0
  Nd  Nd2  1  0.501  0.005  0.000  1.0
  Nd  Nd3  1  0.006  0.508  0.500  1.0
  Nd  Nd4  1  0.676  0.324  0.649  1.0
  Nd  Nd5  1  0.181  0.819  0.141  1.0
  Nd  Nd6  1  0.322  0.678  0.645  1.0
  Nd  Nd7  1  0.823  0.177  0.145  1.0
  Nd  Nd8  1  0.170  0.169  0.646  1.0
  Nd  Nd9  1  0.665  0.668  0.141  1.0
  Nd  Nd10  1  0.831  0.830  0.646  1.0
  Nd  Nd11  1  0.332  0.335  0.141  1.0
  Nd  Nd12  1  0.823  0.177  0.855  1.0
  Nd  Nd13  1  0.322  0.678  0.355  1.0
  Nd  Nd14  1  0.181  0.819  0.859  1.0
  Nd  Nd15  1  0.676  0.324  0.351  1.0
  Nd  Nd16  1  0.332  0.335  0.859  1.0
  Nd  Nd17  1  0.831  0.830  0.354  1.0
  Nd  Nd18  1  0.665  0.668  0.859  1.0
  Nd  Nd19  1  0.170  0.169  0.354  1.0
  Si  Si20  1  0.878  0.122  0.500  1.0
  Si  Si21  1  0.114  0.114  0.000  1.0
  Si  Si22  1  0.618  0.610  0.500  1.0
  Si  Si23  1  0.886  0.886  0.000  1.0
  Si  Si24  1  0.390  0.382  0.500  1.0
  Si  Si25  1  0.501  1.000  0.749  1.0
  Si  Si26  1  0.000  0.499  0.251  1.0
  Si  Si27  1  0.000  0.499  0.749  1.0
  Si  Si28  1  0.501  1.000  0.251  1.0
  Ru  Ru29  1  0.116  0.884  0.500  1.0
  Ru  Ru30  1  0.630  0.370  0.000  1.0
  Ru  Ru31  1  0.372  0.628  0.000  1.0
[/CIF]
.
The structure described by Nd20(RuSi3)3 crystallizes in the orthorhombic Amm2 space group. There are eight inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 6-coordinate geometry to one Ru(2), one Ru(3), two equivalent Si(2), and two equivalent Si(4) atoms. In the second Nd site, Nd(2) is bonded to one Ru(1), one Si(1), two equivalent Si(3), and two equivalent Si(4) atoms to form distorted NdSi5Ru octahedra that share corners with four equivalent Nd(2)Si5Ru octahedra, corners with two equivalent Nd(3)Si5 trigonal bipyramids, corners with four equivalent Nd(7)Si4Ru trigonal bipyramids, faces with two equivalent Nd(3)Si5 trigonal bipyramids, and faces with four equivalent Nd(7)Si4Ru trigonal bipyramids. The corner-sharing octahedral tilt angles range from 54-59°. In the third Nd site, Nd(3) is bonded to one Si(1), two equivalent Si(3), and two equivalent Si(4) atoms to form distorted NdSi5 trigonal bipyramids that share corners with two equivalent Nd(2)Si5Ru octahedra, corners with four equivalent Nd(7)Si4Ru trigonal bipyramids, edges with four equivalent Nd(7)Si4Ru trigonal bipyramids, faces with two equivalent Nd(2)Si5Ru octahedra, and  a faceface with one Nd(3)Si5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 43°. In the fourth Nd site, Nd(4) is bonded in a 5-coordinate geometry to one Ru(3), two equivalent Si(2), and two equivalent Si(4) atoms. In the fifth Nd site, Nd(5) is bonded in a 5-coordinate geometry to one Ru(1), two equivalent Si(3), and two equivalent Si(4) atoms. In the sixth Nd site, Nd(6) is bonded in a 5-coordinate geometry to one Ru(2), two equivalent Si(2), and two equivalent Si(4) atoms. In the seventh Nd site, Nd(7) is bonded to one Ru(1), one Si(1), one Si(3), and two equivalent Si(4) atoms to form distorted NdSi4Ru trigonal bipyramids that share corners with two equivalent Nd(2)Si5Ru octahedra, corners with two equivalent Nd(7)Si4Ru trigonal bipyramids, corners with two equivalent Nd(3)Si5 trigonal bipyramids, edges with two equivalent Nd(7)Si4Ru trigonal bipyramids, edges with two equivalent Nd(3)Si5 trigonal bipyramids, faces with two equivalent Nd(2)Si5Ru octahedra, and  a faceface with one Nd(7)Si4Ru trigonal bipyramid. The corner-sharing octahedral tilt angles are 42°. In the eighth Nd site, Nd(8) is bonded in a 5-coordinate geometry to one Ru(2), one Ru(3), one Si(2), and two equivalent Si(4) atoms. There are three inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 9-coordinate geometry to two equivalent Nd(2), two equivalent Nd(5), four equivalent Nd(7), and one Si(1) atom. In the second Ru site, Ru(2) is bonded in a 8-coordinate geometry to two equivalent Nd(1), two equivalent Nd(6), and four equivalent Nd(8) atoms. In the third Ru site, Ru(3) is bonded in a 8-coordinate geometry to two equivalent Nd(1), two equivalent Nd(4), and four equivalent Nd(8) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Nd(2), two equivalent Nd(3), four equivalent Nd(7), and one Ru(1) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Nd(1), two equivalent Nd(4), two equivalent Nd(6), two equivalent Nd(8), and one Si(2) atom. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Nd(2), two equivalent Nd(3), two equivalent Nd(5), two equivalent Nd(7), and one Si(3) atom. In the fourth Si site, Si(4) is bonded in a 10-coordinate geometry to one Nd(1), one Nd(2), one Nd(3), one Nd(4), one Nd(5), one Nd(6), two equivalent Nd(7), and two equivalent Nd(8) atoms. is represented by the CIF card [CIF]
data_Nd20(Si3Ru)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.814
_cell_length_b   7.814
_cell_length_c   13.871
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   91.164
_symmetry_Int_Tables_number   1
_cell_volume   846.871
_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
  Nd  Nd0  1  0.995  0.499  0.000  1.0
  Nd  Nd1  1  0.492  0.994  0.500  1.0
  Nd  Nd2  1  0.501  0.005  0.000  1.0
  Nd  Nd3  1  0.006  0.508  0.500  1.0
  Nd  Nd4  1  0.676  0.324  0.649  1.0
  Nd  Nd5  1  0.181  0.819  0.141  1.0
  Nd  Nd6  1  0.322  0.678  0.645  1.0
  Nd  Nd7  1  0.823  0.177  0.145  1.0
  Nd  Nd8  1  0.170  0.169  0.646  1.0
  Nd  Nd9  1  0.665  0.668  0.141  1.0
  Nd  Nd10  1  0.831  0.830  0.646  1.0
  Nd  Nd11  1  0.332  0.335  0.141  1.0
  Nd  Nd12  1  0.823  0.177  0.855  1.0
  Nd  Nd13  1  0.322  0.678  0.355  1.0
  Nd  Nd14  1  0.181  0.819  0.859  1.0
  Nd  Nd15  1  0.676  0.324  0.351  1.0
  Nd  Nd16  1  0.332  0.335  0.859  1.0
  Nd  Nd17  1  0.831  0.830  0.354  1.0
  Nd  Nd18  1  0.665  0.668  0.859  1.0
  Nd  Nd19  1  0.170  0.169  0.354  1.0
  Si  Si20  1  0.878  0.122  0.500  1.0
  Si  Si21  1  0.114  0.114  0.000  1.0
  Si  Si22  1  0.618  0.610  0.500  1.0
  Si  Si23  1  0.886  0.886  0.000  1.0
  Si  Si24  1  0.390  0.382  0.500  1.0
  Si  Si25  1  0.501  1.000  0.749  1.0
  Si  Si26  1  0.000  0.499  0.251  1.0
  Si  Si27  1  0.000  0.499  0.749  1.0
  Si  Si28  1  0.501  1.000  0.251  1.0
  Ru  Ru29  1  0.116  0.884  0.500  1.0
  Ru  Ru30  1  0.630  0.370  0.000  1.0
  Ru  Ru31  1  0.372  0.628  0.000  1.0
[/CIF]
.