The material structure described by Er6Ni2Sn crystallizes in the orthorhombic Immm space group. There are three inequivalent Er sites. In the first Er site, Er(1) is bonded in a 4-coordinate geometry to one Ni(1), two equivalent Ni(2), and one Sn(1) atom. In the second Er site, Er(2) is bonded in a 4-coordinate geometry to one Ni(1), one Ni(2), one Sn(1), and one Sn(2) atom. In the third Er site, Er(3) is bonded in a 5-coordinate geometry to one Ni(2), two equivalent Ni(1), one Sn(1), and one Sn(2) atom. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to two equivalent Er(1), two equivalent Er(2), four equivalent Er(3), and one Ni(1) atom. In the second Ni site, Ni(2) is bonded in a 8-coordinate geometry to two equivalent Er(2), two equivalent Er(3), and four equivalent Er(1) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a cuboctahedral geometry to four equivalent Er(1), four equivalent Er(2), and four equivalent Er(3) atoms. In the second Sn site, Sn(2) is bonded in a body-centered cubic geometry to four equivalent Er(2) and four equivalent Er(3) atoms. is represented by the CIF file [CIF]
data_Er6Ni2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.340
_cell_length_b   8.340
_cell_length_c   8.340
_cell_angle_alpha   113.055
_cell_angle_beta   109.766
_cell_angle_gamma   105.676
_symmetry_Int_Tables_number   1
_cell_volume   444.750
_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  0.325  0.135  0.809  1.0
  Er  Er1  1  0.675  0.484  0.809  1.0
  Er  Er2  1  0.438  0.733  0.704  1.0
  Er  Er3  1  0.562  0.267  0.296  1.0
  Er  Er4  1  0.971  0.267  0.704  1.0
  Er  Er5  1  0.029  0.733  0.296  1.0
  Er  Er6  1  0.325  0.516  0.191  1.0
  Er  Er7  1  0.675  0.865  0.191  1.0
  Er  Er8  1  0.183  0.792  0.975  1.0
  Er  Er9  1  0.817  0.792  0.609  1.0
  Er  Er10  1  0.183  0.208  0.391  1.0
  Er  Er11  1  0.817  0.208  0.025  1.0
  Ni  Ni12  1  0.876  0.876  0.000  1.0
  Ni  Ni13  1  0.124  0.124  0.000  1.0
  Ni  Ni14  1  0.651  0.500  0.151  1.0
  Ni  Ni15  1  0.349  0.500  0.849  1.0
  Sn  Sn16  1  0.500  0.000  0.500  1.0
  Sn  Sn17  1  0.000  0.500  0.500  1.0
[/CIF]
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The material structure described by Er6Ni2Sn crystallizes in the orthorhombic Immm space group. There are three inequivalent Er sites. In the first Er site, Er(1) is bonded in a 4-coordinate geometry to one Ni(1), two equivalent Ni(2), and one Sn(1) atom. In the second Er site, Er(2) is bonded in a 4-coordinate geometry to one Ni(1), one Ni(2), one Sn(1), and one Sn(2) atom. In the third Er site, Er(3) is bonded in a 5-coordinate geometry to one Ni(2), two equivalent Ni(1), one Sn(1), and one Sn(2) atom. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to two equivalent Er(1), two equivalent Er(2), four equivalent Er(3), and one Ni(1) atom. In the second Ni site, Ni(2) is bonded in a 8-coordinate geometry to two equivalent Er(2), two equivalent Er(3), and four equivalent Er(1) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a cuboctahedral geometry to four equivalent Er(1), four equivalent Er(2), and four equivalent Er(3) atoms. In the second Sn site, Sn(2) is bonded in a body-centered cubic geometry to four equivalent Er(2) and four equivalent Er(3) atoms. is represented by the CIF file [CIF]
data_Er6Ni2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.340
_cell_length_b   8.340
_cell_length_c   8.340
_cell_angle_alpha   113.055
_cell_angle_beta   109.766
_cell_angle_gamma   105.676
_symmetry_Int_Tables_number   1
_cell_volume   444.750
_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  0.325  0.135  0.809  1.0
  Er  Er1  1  0.675  0.484  0.809  1.0
  Er  Er2  1  0.438  0.733  0.704  1.0
  Er  Er3  1  0.562  0.267  0.296  1.0
  Er  Er4  1  0.971  0.267  0.704  1.0
  Er  Er5  1  0.029  0.733  0.296  1.0
  Er  Er6  1  0.325  0.516  0.191  1.0
  Er  Er7  1  0.675  0.865  0.191  1.0
  Er  Er8  1  0.183  0.792  0.975  1.0
  Er  Er9  1  0.817  0.792  0.609  1.0
  Er  Er10  1  0.183  0.208  0.391  1.0
  Er  Er11  1  0.817  0.208  0.025  1.0
  Ni  Ni12  1  0.876  0.876  0.000  1.0
  Ni  Ni13  1  0.124  0.124  0.000  1.0
  Ni  Ni14  1  0.651  0.500  0.151  1.0
  Ni  Ni15  1  0.349  0.500  0.849  1.0
  Sn  Sn16  1  0.500  0.000  0.500  1.0
  Sn  Sn17  1  0.000  0.500  0.500  1.0
[/CIF]
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