The structure described by ErCrB4 crystallizes in the orthorhombic Pbam space group. Er(1) is bonded in a 14-coordinate geometry to two equivalent B(4), four equivalent B(1), four equivalent B(2), and four equivalent B(3) atoms. Cr(1) is bonded in a 10-coordinate geometry to two equivalent B(1), two equivalent B(2), two equivalent B(3), and four equivalent B(4) atoms. There are four inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to four equivalent Er(1), two equivalent Cr(1), one B(4), and two equivalent B(2) atoms. In the second B site, B(2) is bonded in a 9-coordinate geometry to four equivalent Er(1), two equivalent Cr(1), one B(3), and two equivalent B(1) atoms. In the third B site, B(3) is bonded in a 9-coordinate geometry to four equivalent Er(1), two equivalent Cr(1), one B(2), one B(3), and one B(4) atom. In the fourth B site, B(4) is bonded in a 9-coordinate geometry to two equivalent Er(1), four equivalent Cr(1), one B(1), one B(3), and one B(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErCrB4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.908
_cell_length_b   11.420
_cell_length_c   3.427
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   231.204
_cell_formula_units_Z   4
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  0.124  0.151  0.000  1.0
  Er  Er1  1  0.876  0.849  1.000  1.0
  Er  Er2  1  0.624  0.349  1.000  1.0
  Er  Er3  1  0.376  0.651  1.000  1.0
  Cr  Cr4  1  0.127  0.417  1.000  1.0
  Cr  Cr5  1  0.873  0.583  1.000  1.0
  Cr  Cr6  1  0.627  0.083  0.000  1.0
  Cr  Cr7  1  0.373  0.917  0.000  1.0
  B  B8  1  0.475  0.192  0.500  1.0
  B  B9  1  0.525  0.808  0.500  1.0
  B  B10  1  0.975  0.308  0.500  1.0
  B  B11  1  0.025  0.692  0.500  1.0
  B  B12  1  0.283  0.315  0.500  1.0
  B  B13  1  0.717  0.685  0.500  1.0
  B  B14  1  0.783  0.185  0.500  1.0
  B  B15  1  0.217  0.815  0.500  1.0
  B  B16  1  0.363  0.468  0.500  1.0
  B  B17  1  0.637  0.532  0.500  1.0
  B  B18  1  0.863  0.032  0.500  1.0
  B  B19  1  0.137  0.968  0.500  1.0
  B  B20  1  0.386  0.047  0.500  1.0
  B  B21  1  0.614  0.953  0.500  1.0
  B  B22  1  0.886  0.453  0.500  1.0
  B  B23  1  0.114  0.547  0.500  1.0
[/CIF]
.
The structure described by ErCrB4 crystallizes in the orthorhombic Pbam space group. Er(1) is bonded in a 14-coordinate geometry to two equivalent B(4), four equivalent B(1), four equivalent B(2), and four equivalent B(3) atoms. Cr(1) is bonded in a 10-coordinate geometry to two equivalent B(1), two equivalent B(2), two equivalent B(3), and four equivalent B(4) atoms. There are four inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to four equivalent Er(1), two equivalent Cr(1), one B(4), and two equivalent B(2) atoms. In the second B site, B(2) is bonded in a 9-coordinate geometry to four equivalent Er(1), two equivalent Cr(1), one B(3), and two equivalent B(1) atoms. In the third B site, B(3) is bonded in a 9-coordinate geometry to four equivalent Er(1), two equivalent Cr(1), one B(2), one B(3), and one B(4) atom. In the fourth B site, B(4) is bonded in a 9-coordinate geometry to two equivalent Er(1), four equivalent Cr(1), one B(1), one B(3), and one B(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErCrB4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.908
_cell_length_b   11.420
_cell_length_c   3.427
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   231.204
_cell_formula_units_Z   4
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  0.124  0.151  0.000  1.0
  Er  Er1  1  0.876  0.849  1.000  1.0
  Er  Er2  1  0.624  0.349  1.000  1.0
  Er  Er3  1  0.376  0.651  1.000  1.0
  Cr  Cr4  1  0.127  0.417  1.000  1.0
  Cr  Cr5  1  0.873  0.583  1.000  1.0
  Cr  Cr6  1  0.627  0.083  0.000  1.0
  Cr  Cr7  1  0.373  0.917  0.000  1.0
  B  B8  1  0.475  0.192  0.500  1.0
  B  B9  1  0.525  0.808  0.500  1.0
  B  B10  1  0.975  0.308  0.500  1.0
  B  B11  1  0.025  0.692  0.500  1.0
  B  B12  1  0.283  0.315  0.500  1.0
  B  B13  1  0.717  0.685  0.500  1.0
  B  B14  1  0.783  0.185  0.500  1.0
  B  B15  1  0.217  0.815  0.500  1.0
  B  B16  1  0.363  0.468  0.500  1.0
  B  B17  1  0.637  0.532  0.500  1.0
  B  B18  1  0.863  0.032  0.500  1.0
  B  B19  1  0.137  0.968  0.500  1.0
  B  B20  1  0.386  0.047  0.500  1.0
  B  B21  1  0.614  0.953  0.500  1.0
  B  B22  1  0.886  0.453  0.500  1.0
  B  B23  1  0.114  0.547  0.500  1.0
[/CIF]
.