The crystal structure described by Eu3Ni7B2 crystallizes in the hexagonal P-6m2 space group. There are three inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a distorted trigonal planar geometry to three equivalent Eu(3) and three equivalent Ni(2) atoms. In the second Eu site, Eu(2) is bonded in a 18-coordinate geometry to twelve equivalent Ni(1), three equivalent B(1), and three equivalent B(2) atoms. In the third Eu site, Eu(3) is bonded to three equivalent Eu(1), three equivalent Ni(2), and six equivalent Ni(1) atoms to form distorted EuEu3Ni9 cuboctahedra that share corners with three equivalent Ni(2)Eu6Ni6 cuboctahedra, edges with six equivalent Eu(3)Eu3Ni9 cuboctahedra, and faces with three equivalent Ni(2)Eu6Ni6 cuboctahedra. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 2-coordinate geometry to one Eu(3), two equivalent Eu(2), one Ni(2), one B(1), and one B(2) atom. In the second Ni site, Ni(2) is bonded to three equivalent Eu(1), three equivalent Eu(3), and six equivalent Ni(1) atoms to form NiEu6Ni6 cuboctahedra that share corners with three equivalent Eu(3)Eu3Ni9 cuboctahedra, edges with six equivalent Ni(2)Eu6Ni6 cuboctahedra, and faces with three equivalent Eu(3)Eu3Ni9 cuboctahedra. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 6-coordinate geometry to three equivalent Eu(2) and six equivalent Ni(1) atoms. In the second B site, B(2) is bonded in a 6-coordinate geometry to three equivalent Eu(2) and six equivalent Ni(1) atoms. is represented by the CIF card [CIF]
data_Eu3Ni7B2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.225
_cell_length_b   5.233
_cell_length_c   7.249
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.016
_symmetry_Int_Tables_number   1
_cell_volume   171.634
_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
  Eu  Eu0  1  0.000  1.000  0.000  1.0
  Eu  Eu1  1  0.000  1.000  0.500  1.0
  Eu  Eu2  1  0.333  0.667  0.000  1.0
  Ni  Ni3  1  0.505  0.010  0.315  1.0
  Ni  Ni4  1  0.505  0.495  0.315  1.0
  Ni  Ni5  1  0.990  0.495  0.315  1.0
  Ni  Ni6  1  0.505  0.010  0.685  1.0
  Ni  Ni7  1  0.505  0.495  0.685  1.0
  Ni  Ni8  1  0.990  0.495  0.685  1.0
  Ni  Ni9  1  0.667  0.333  0.000  1.0
  B  B10  1  0.333  0.667  0.500  1.0
  B  B11  1  0.667  0.333  0.500  1.0
[/CIF]
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The crystal structure described by Eu3Ni7B2 crystallizes in the hexagonal P-6m2 space group. There are three inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a distorted trigonal planar geometry to three equivalent Eu(3) and three equivalent Ni(2) atoms. In the second Eu site, Eu(2) is bonded in a 18-coordinate geometry to twelve equivalent Ni(1), three equivalent B(1), and three equivalent B(2) atoms. In the third Eu site, Eu(3) is bonded to three equivalent Eu(1), three equivalent Ni(2), and six equivalent Ni(1) atoms to form distorted EuEu3Ni9 cuboctahedra that share corners with three equivalent Ni(2)Eu6Ni6 cuboctahedra, edges with six equivalent Eu(3)Eu3Ni9 cuboctahedra, and faces with three equivalent Ni(2)Eu6Ni6 cuboctahedra. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 2-coordinate geometry to one Eu(3), two equivalent Eu(2), one Ni(2), one B(1), and one B(2) atom. In the second Ni site, Ni(2) is bonded to three equivalent Eu(1), three equivalent Eu(3), and six equivalent Ni(1) atoms to form NiEu6Ni6 cuboctahedra that share corners with three equivalent Eu(3)Eu3Ni9 cuboctahedra, edges with six equivalent Ni(2)Eu6Ni6 cuboctahedra, and faces with three equivalent Eu(3)Eu3Ni9 cuboctahedra. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 6-coordinate geometry to three equivalent Eu(2) and six equivalent Ni(1) atoms. In the second B site, B(2) is bonded in a 6-coordinate geometry to three equivalent Eu(2) and six equivalent Ni(1) atoms. is represented by the CIF card [CIF]
data_Eu3Ni7B2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.225
_cell_length_b   5.233
_cell_length_c   7.249
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.016
_symmetry_Int_Tables_number   1
_cell_volume   171.634
_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
  Eu  Eu0  1  0.000  1.000  0.000  1.0
  Eu  Eu1  1  0.000  1.000  0.500  1.0
  Eu  Eu2  1  0.333  0.667  0.000  1.0
  Ni  Ni3  1  0.505  0.010  0.315  1.0
  Ni  Ni4  1  0.505  0.495  0.315  1.0
  Ni  Ni5  1  0.990  0.495  0.315  1.0
  Ni  Ni6  1  0.505  0.010  0.685  1.0
  Ni  Ni7  1  0.505  0.495  0.685  1.0
  Ni  Ni8  1  0.990  0.495  0.685  1.0
  Ni  Ni9  1  0.667  0.333  0.000  1.0
  B  B10  1  0.333  0.667  0.500  1.0
  B  B11  1  0.667  0.333  0.500  1.0
[/CIF]
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