The structure described by Ir2Zn2B crystallizes in the orthorhombic Cmcm space group. There are four inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 9-coordinate geometry to two equivalent Zn(1), two equivalent Zn(4), three equivalent Zn(2), and two equivalent B(1) atoms. In the second Ir site, Ir(2) is bonded in a 6-coordinate geometry to four equivalent Zn(1), four equivalent Zn(3), and two equivalent B(2) atoms. In the third Ir site, Ir(3) is bonded in a 8-coordinate geometry to four equivalent Zn(2) and four equivalent B(1) atoms. In the fourth Ir site, Ir(4) is bonded in a 8-coordinate geometry to two equivalent Zn(1), two equivalent Zn(3), two equivalent B(1), and two equivalent B(2) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Ir(1), two equivalent Ir(2), two equivalent Ir(4), one Zn(3), one Zn(4), three equivalent Zn(1), and one B(1) atom to form a mixture of distorted corner and face-sharing ZnZn5BIr6 cuboctahedra. In the second Zn site, Zn(2) is bonded in a 13-coordinate geometry to two equivalent Ir(3), three equivalent Ir(1), two equivalent Zn(4), five equivalent Zn(2), and one B(1) atom. In the third Zn site, Zn(3) is bonded in a 14-coordinate geometry to four equivalent Ir(2), four equivalent Ir(4), two equivalent Zn(1), two equivalent Zn(3), and two equivalent B(2) atoms. In the fourth Zn site, Zn(4) is bonded in a 4-coordinate geometry to four equivalent Ir(1), two equivalent Zn(1), and four equivalent Zn(2) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 8-coordinate geometry to two equivalent Ir(1), two equivalent Ir(3), two equivalent Ir(4), one Zn(1), and one Zn(2) atom. In the second B site, B(2) is bonded in a 6-coordinate geometry to two equivalent Ir(2), four equivalent Ir(4), and two equivalent Zn(3) atoms. is represented by the CIF card [CIF]
data_Zn2BIr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.339
_cell_length_b   13.339
_cell_length_c   10.191
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   167.853
_symmetry_Int_Tables_number   1
_cell_volume   381.577
_cell_formula_units_Z   6
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
  Zn  Zn0  1  0.089  0.911  0.120  1.0
  Zn  Zn1  1  0.911  0.089  0.880  1.0
  Zn  Zn2  1  0.911  0.089  0.620  1.0
  Zn  Zn3  1  0.089  0.911  0.380  1.0
  Zn  Zn4  1  0.239  0.761  0.611  1.0
  Zn  Zn5  1  0.761  0.239  0.389  1.0
  Zn  Zn6  1  0.000  0.000  0.000  1.0
  Zn  Zn7  1  0.000  0.000  0.500  1.0
  Zn  Zn8  1  0.820  0.180  0.750  1.0
  Zn  Zn9  1  0.180  0.820  0.250  1.0
  Zn  Zn10  1  0.239  0.761  0.889  1.0
  Zn  Zn11  1  0.761  0.239  0.111  1.0
  B  B12  1  0.139  0.861  0.605  1.0
  B  B13  1  0.861  0.139  0.395  1.0
  B  B14  1  0.861  0.139  0.105  1.0
  B  B15  1  0.139  0.861  0.895  1.0
  B  B16  1  0.959  0.041  0.250  1.0
  B  B17  1  0.041  0.959  0.750  1.0
  Ir  Ir18  1  0.331  0.669  0.532  1.0
  Ir  Ir19  1  0.669  0.331  0.468  1.0
  Ir  Ir20  1  0.669  0.331  0.032  1.0
  Ir  Ir21  1  0.331  0.669  0.968  1.0
  Ir  Ir22  1  0.520  0.480  0.250  1.0
  Ir  Ir23  1  0.480  0.520  0.750  1.0
  Ir  Ir24  1  0.328  0.672  0.250  1.0
  Ir  Ir25  1  0.672  0.328  0.750  1.0
  Ir  Ir26  1  0.575  0.425  0.609  1.0
  Ir  Ir27  1  0.425  0.575  0.391  1.0
  Ir  Ir28  1  0.425  0.575  0.109  1.0
  Ir  Ir29  1  0.575  0.425  0.891  1.0
[/CIF]
.
The structure described by Ir2Zn2B crystallizes in the orthorhombic Cmcm space group. There are four inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 9-coordinate geometry to two equivalent Zn(1), two equivalent Zn(4), three equivalent Zn(2), and two equivalent B(1) atoms. In the second Ir site, Ir(2) is bonded in a 6-coordinate geometry to four equivalent Zn(1), four equivalent Zn(3), and two equivalent B(2) atoms. In the third Ir site, Ir(3) is bonded in a 8-coordinate geometry to four equivalent Zn(2) and four equivalent B(1) atoms. In the fourth Ir site, Ir(4) is bonded in a 8-coordinate geometry to two equivalent Zn(1), two equivalent Zn(3), two equivalent B(1), and two equivalent B(2) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Ir(1), two equivalent Ir(2), two equivalent Ir(4), one Zn(3), one Zn(4), three equivalent Zn(1), and one B(1) atom to form a mixture of distorted corner and face-sharing ZnZn5BIr6 cuboctahedra. In the second Zn site, Zn(2) is bonded in a 13-coordinate geometry to two equivalent Ir(3), three equivalent Ir(1), two equivalent Zn(4), five equivalent Zn(2), and one B(1) atom. In the third Zn site, Zn(3) is bonded in a 14-coordinate geometry to four equivalent Ir(2), four equivalent Ir(4), two equivalent Zn(1), two equivalent Zn(3), and two equivalent B(2) atoms. In the fourth Zn site, Zn(4) is bonded in a 4-coordinate geometry to four equivalent Ir(1), two equivalent Zn(1), and four equivalent Zn(2) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 8-coordinate geometry to two equivalent Ir(1), two equivalent Ir(3), two equivalent Ir(4), one Zn(1), and one Zn(2) atom. In the second B site, B(2) is bonded in a 6-coordinate geometry to two equivalent Ir(2), four equivalent Ir(4), and two equivalent Zn(3) atoms. is represented by the CIF card [CIF]
data_Zn2BIr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.339
_cell_length_b   13.339
_cell_length_c   10.191
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   167.853
_symmetry_Int_Tables_number   1
_cell_volume   381.577
_cell_formula_units_Z   6
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
  Zn  Zn0  1  0.089  0.911  0.120  1.0
  Zn  Zn1  1  0.911  0.089  0.880  1.0
  Zn  Zn2  1  0.911  0.089  0.620  1.0
  Zn  Zn3  1  0.089  0.911  0.380  1.0
  Zn  Zn4  1  0.239  0.761  0.611  1.0
  Zn  Zn5  1  0.761  0.239  0.389  1.0
  Zn  Zn6  1  0.000  0.000  0.000  1.0
  Zn  Zn7  1  0.000  0.000  0.500  1.0
  Zn  Zn8  1  0.820  0.180  0.750  1.0
  Zn  Zn9  1  0.180  0.820  0.250  1.0
  Zn  Zn10  1  0.239  0.761  0.889  1.0
  Zn  Zn11  1  0.761  0.239  0.111  1.0
  B  B12  1  0.139  0.861  0.605  1.0
  B  B13  1  0.861  0.139  0.395  1.0
  B  B14  1  0.861  0.139  0.105  1.0
  B  B15  1  0.139  0.861  0.895  1.0
  B  B16  1  0.959  0.041  0.250  1.0
  B  B17  1  0.041  0.959  0.750  1.0
  Ir  Ir18  1  0.331  0.669  0.532  1.0
  Ir  Ir19  1  0.669  0.331  0.468  1.0
  Ir  Ir20  1  0.669  0.331  0.032  1.0
  Ir  Ir21  1  0.331  0.669  0.968  1.0
  Ir  Ir22  1  0.520  0.480  0.250  1.0
  Ir  Ir23  1  0.480  0.520  0.750  1.0
  Ir  Ir24  1  0.328  0.672  0.250  1.0
  Ir  Ir25  1  0.672  0.328  0.750  1.0
  Ir  Ir26  1  0.575  0.425  0.609  1.0
  Ir  Ir27  1  0.425  0.575  0.391  1.0
  Ir  Ir28  1  0.425  0.575  0.109  1.0
  Ir  Ir29  1  0.575  0.425  0.891  1.0
[/CIF]
.