The crystal structure described by Er3Co11B4 crystallizes in the hexagonal P6/mmm space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 6-coordinate geometry to six equivalent Co(1) atoms. In the second Er site, Er(2) is bonded in a 18-coordinate geometry to six equivalent Co(2), six equivalent Co(3), and six equivalent B(1) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to three equivalent Er(1) and six equivalent Co(3) atoms. In the second Co site, Co(2) is bonded in a distorted square co-planar geometry to four equivalent Er(2) and four equivalent B(1) atoms. In the third Co site, Co(3) is bonded in a distorted L-shaped geometry to two equivalent Er(2), two equivalent Co(1), and two equivalent B(1) atoms. B(1) is bonded in a 6-coordinate geometry to three equivalent Er(2), three equivalent Co(2), and three equivalent Co(3) atoms. is represented by the CIF file [CIF]
data_Er3Co11B4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.998
_cell_length_b   4.998
_cell_length_c   9.743
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   210.739
_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
  Er  Er0  1  0.000  0.000  0.000  1.0
  Er  Er1  1  0.000  0.000  0.658  1.0
  Er  Er2  1  0.000  0.000  0.342  1.0
  Co  Co3  1  0.667  0.333  0.000  1.0
  Co  Co4  1  0.333  0.667  0.000  1.0
  Co  Co5  1  0.500  0.500  0.500  1.0
  Co  Co6  1  0.500  0.000  0.500  1.0
  Co  Co7  1  0.000  0.500  0.500  1.0
  Co  Co8  1  0.500  0.500  0.798  1.0
  Co  Co9  1  0.500  0.000  0.798  1.0
  Co  Co10  1  0.000  0.500  0.798  1.0
  Co  Co11  1  0.500  0.500  0.202  1.0
  Co  Co12  1  0.500  0.000  0.202  1.0
  Co  Co13  1  0.000  0.500  0.202  1.0
  B  B14  1  0.667  0.333  0.650  1.0
  B  B15  1  0.333  0.667  0.650  1.0
  B  B16  1  0.333  0.667  0.350  1.0
  B  B17  1  0.667  0.333  0.350  1.0
[/CIF]
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The crystal structure described by Er3Co11B4 crystallizes in the hexagonal P6/mmm space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 6-coordinate geometry to six equivalent Co(1) atoms. In the second Er site, Er(2) is bonded in a 18-coordinate geometry to six equivalent Co(2), six equivalent Co(3), and six equivalent B(1) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to three equivalent Er(1) and six equivalent Co(3) atoms. In the second Co site, Co(2) is bonded in a distorted square co-planar geometry to four equivalent Er(2) and four equivalent B(1) atoms. In the third Co site, Co(3) is bonded in a distorted L-shaped geometry to two equivalent Er(2), two equivalent Co(1), and two equivalent B(1) atoms. B(1) is bonded in a 6-coordinate geometry to three equivalent Er(2), three equivalent Co(2), and three equivalent Co(3) atoms. is represented by the CIF file [CIF]
data_Er3Co11B4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.998
_cell_length_b   4.998
_cell_length_c   9.743
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   210.739
_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
  Er  Er0  1  0.000  0.000  0.000  1.0
  Er  Er1  1  0.000  0.000  0.658  1.0
  Er  Er2  1  0.000  0.000  0.342  1.0
  Co  Co3  1  0.667  0.333  0.000  1.0
  Co  Co4  1  0.333  0.667  0.000  1.0
  Co  Co5  1  0.500  0.500  0.500  1.0
  Co  Co6  1  0.500  0.000  0.500  1.0
  Co  Co7  1  0.000  0.500  0.500  1.0
  Co  Co8  1  0.500  0.500  0.798  1.0
  Co  Co9  1  0.500  0.000  0.798  1.0
  Co  Co10  1  0.000  0.500  0.798  1.0
  Co  Co11  1  0.500  0.500  0.202  1.0
  Co  Co12  1  0.500  0.000  0.202  1.0
  Co  Co13  1  0.000  0.500  0.202  1.0
  B  B14  1  0.667  0.333  0.650  1.0
  B  B15  1  0.333  0.667  0.650  1.0
  B  B16  1  0.333  0.667  0.350  1.0
  B  B17  1  0.667  0.333  0.350  1.0
[/CIF]
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