The structure described by Eu4Ir8As7 crystallizes in the monoclinic P2_1/m space group. There are four inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 15-coordinate geometry to one Ir(4), one Ir(5), two equivalent Ir(2), two equivalent Ir(7), three equivalent Ir(8), two equivalent As(2), two equivalent As(4), and two equivalent As(5) atoms. In the second Eu site, Eu(2) is bonded in a 15-coordinate geometry to one Ir(2), one Ir(6), two equivalent Ir(1), two equivalent Ir(7), three equivalent Ir(4), two equivalent As(3), two equivalent As(5), and two equivalent As(6) atoms. In the third Eu site, Eu(3) is bonded in a 1-coordinate geometry to one Ir(1), two equivalent Ir(7), three equivalent Ir(6), one As(7), two equivalent As(1), two equivalent As(3), and two equivalent As(4) atoms. In the fourth Eu site, Eu(4) is bonded in a 1-coordinate geometry to one Ir(1), one Ir(8), two equivalent Ir(5), one As(6), two equivalent As(1), two equivalent As(2), and two equivalent As(7) atoms. There are eight inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 10-coordinate geometry to one Eu(3), one Eu(4), two equivalent Eu(2), two equivalent Ir(6), one As(3), one As(6), and two equivalent As(1) atoms. In the second Ir site, Ir(2) is bonded in a 7-coordinate geometry to one Eu(2), two equivalent Eu(1), two equivalent Ir(4), one As(2), one As(5), and two equivalent As(6) atoms. In the third Ir site, Ir(3) is bonded in a 4-coordinate geometry to one As(1) and three equivalent As(7) atoms. In the fourth Ir site, Ir(4) is bonded in a 12-coordinate geometry to one Eu(1), three equivalent Eu(2), two equivalent Ir(2), two equivalent Ir(4), one As(6), and three equivalent As(5) atoms. In the fifth Ir site, Ir(5) is bonded in a 7-coordinate geometry to one Eu(1), two equivalent Eu(4), two equivalent Ir(8), one As(2), one As(7), and two equivalent As(4) atoms. In the sixth Ir site, Ir(6) is bonded in a 12-coordinate geometry to one Eu(2), three equivalent Eu(3), two equivalent Ir(1), two equivalent Ir(6), one As(1), and three equivalent As(3) atoms. In the seventh Ir site, Ir(7) is bonded in a 9-coordinate geometry to two equivalent Eu(1), two equivalent Eu(2), two equivalent Eu(3), one As(3), one As(4), and one As(5) atom. In the eighth Ir site, Ir(8) is bonded to one Eu(4), three equivalent Eu(1), two equivalent Ir(5), two equivalent Ir(8), one As(4), and three equivalent As(2) atoms to form distorted face-sharing IrEu4As4Ir4 cuboctahedra. There are seven inequivalent As sites. In the first As site, As(1) is bonded in a 8-coordinate geometry to two equivalent Eu(3), two equivalent Eu(4), one Ir(3), one Ir(6), and two equivalent Ir(1) atoms. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent Eu(1), two equivalent Eu(4), one Ir(2), one Ir(5), and three equivalent Ir(8) atoms. In the third As site, As(3) is bonded in a 9-coordinate geometry to two equivalent Eu(2), two equivalent Eu(3), one Ir(1), one Ir(7), and three equivalent Ir(6) atoms. In the fourth As site, As(4) is bonded in a 8-coordinate geometry to two equivalent Eu(1), two equivalent Eu(3), one Ir(7), one Ir(8), and two equivalent Ir(5) atoms. In the fifth As site, As(5) is bonded in a 9-coordinate geometry to two equivalent Eu(1), two equivalent Eu(2), one Ir(2), one Ir(7), and three equivalent Ir(4) atoms. In the sixth As site, As(6) is bonded in a 7-coordinate geometry to one Eu(4), two equivalent Eu(2), one Ir(1), one Ir(4), and two equivalent Ir(2) atoms. In the seventh As site, As(7) is bonded in a 7-coordinate geometry to one Eu(3), two equivalent Eu(4), one Ir(5), and three equivalent Ir(3) atoms. is represented by the CIF card [CIF]
data_Eu4As7Ir8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.115
_cell_length_b   13.106
_cell_length_c   13.622
_cell_angle_alpha   98.494
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   726.550
_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
  Eu  Eu0  1  0.750  0.213  0.565  1.0
  Eu  Eu1  1  0.250  0.787  0.435  1.0
  Eu  Eu2  1  0.750  0.514  0.709  1.0
  Eu  Eu3  1  0.250  0.486  0.291  1.0
  Eu  Eu4  1  0.750  0.286  0.896  1.0
  Eu  Eu5  1  0.250  0.714  0.104  1.0
  Eu  Eu6  1  0.750  0.102  0.206  1.0
  Eu  Eu7  1  0.250  0.898  0.794  1.0
  As  As8  1  0.750  0.743  0.919  1.0
  As  As9  1  0.250  0.257  0.081  1.0
  As  As10  1  0.750  0.906  0.587  1.0
  As  As11  1  0.250  0.094  0.413  1.0
  As  As12  1  0.750  0.530  0.127  1.0
  As  As13  1  0.250  0.470  0.873  1.0
  As  As14  1  0.750  0.848  0.280  1.0
  As  As15  1  0.250  0.152  0.720  1.0
  As  As16  1  0.750  0.609  0.437  1.0
  As  As17  1  0.250  0.391  0.563  1.0
  As  As18  1  0.750  0.311  0.311  1.0
  As  As19  1  0.250  0.689  0.689  1.0
  As  As20  1  0.750  0.058  0.900  1.0
  As  As21  1  0.250  0.942  0.100  1.0
  Ir  Ir22  1  0.750  0.343  0.138  1.0
  Ir  Ir23  1  0.250  0.657  0.862  1.0
  Ir  Ir24  1  0.750  0.722  0.602  1.0
  Ir  Ir25  1  0.250  0.278  0.398  1.0
  Ir  Ir26  1  0.750  0.920  0.002  1.0
  Ir  Ir27  1  0.250  0.080  0.998  1.0
  Ir  Ir28  1  0.750  0.425  0.471  1.0
  Ir  Ir29  1  0.250  0.575  0.529  1.0
  Ir  Ir30  1  0.750  0.056  0.721  1.0
  Ir  Ir31  1  0.250  0.944  0.279  1.0
  Ir  Ir32  1  0.750  0.553  0.951  1.0
  Ir  Ir33  1  0.250  0.447  0.049  1.0
  Ir  Ir34  1  0.750  0.664  0.272  1.0
  Ir  Ir35  1  0.250  0.336  0.728  1.0
  Ir  Ir36  1  0.750  0.986  0.427  1.0
  Ir  Ir37  1  0.250  0.014  0.573  1.0
[/CIF]
.
The structure described by Eu4Ir8As7 crystallizes in the monoclinic P2_1/m space group. There are four inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 15-coordinate geometry to one Ir(4), one Ir(5), two equivalent Ir(2), two equivalent Ir(7), three equivalent Ir(8), two equivalent As(2), two equivalent As(4), and two equivalent As(5) atoms. In the second Eu site, Eu(2) is bonded in a 15-coordinate geometry to one Ir(2), one Ir(6), two equivalent Ir(1), two equivalent Ir(7), three equivalent Ir(4), two equivalent As(3), two equivalent As(5), and two equivalent As(6) atoms. In the third Eu site, Eu(3) is bonded in a 1-coordinate geometry to one Ir(1), two equivalent Ir(7), three equivalent Ir(6), one As(7), two equivalent As(1), two equivalent As(3), and two equivalent As(4) atoms. In the fourth Eu site, Eu(4) is bonded in a 1-coordinate geometry to one Ir(1), one Ir(8), two equivalent Ir(5), one As(6), two equivalent As(1), two equivalent As(2), and two equivalent As(7) atoms. There are eight inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 10-coordinate geometry to one Eu(3), one Eu(4), two equivalent Eu(2), two equivalent Ir(6), one As(3), one As(6), and two equivalent As(1) atoms. In the second Ir site, Ir(2) is bonded in a 7-coordinate geometry to one Eu(2), two equivalent Eu(1), two equivalent Ir(4), one As(2), one As(5), and two equivalent As(6) atoms. In the third Ir site, Ir(3) is bonded in a 4-coordinate geometry to one As(1) and three equivalent As(7) atoms. In the fourth Ir site, Ir(4) is bonded in a 12-coordinate geometry to one Eu(1), three equivalent Eu(2), two equivalent Ir(2), two equivalent Ir(4), one As(6), and three equivalent As(5) atoms. In the fifth Ir site, Ir(5) is bonded in a 7-coordinate geometry to one Eu(1), two equivalent Eu(4), two equivalent Ir(8), one As(2), one As(7), and two equivalent As(4) atoms. In the sixth Ir site, Ir(6) is bonded in a 12-coordinate geometry to one Eu(2), three equivalent Eu(3), two equivalent Ir(1), two equivalent Ir(6), one As(1), and three equivalent As(3) atoms. In the seventh Ir site, Ir(7) is bonded in a 9-coordinate geometry to two equivalent Eu(1), two equivalent Eu(2), two equivalent Eu(3), one As(3), one As(4), and one As(5) atom. In the eighth Ir site, Ir(8) is bonded to one Eu(4), three equivalent Eu(1), two equivalent Ir(5), two equivalent Ir(8), one As(4), and three equivalent As(2) atoms to form distorted face-sharing IrEu4As4Ir4 cuboctahedra. There are seven inequivalent As sites. In the first As site, As(1) is bonded in a 8-coordinate geometry to two equivalent Eu(3), two equivalent Eu(4), one Ir(3), one Ir(6), and two equivalent Ir(1) atoms. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent Eu(1), two equivalent Eu(4), one Ir(2), one Ir(5), and three equivalent Ir(8) atoms. In the third As site, As(3) is bonded in a 9-coordinate geometry to two equivalent Eu(2), two equivalent Eu(3), one Ir(1), one Ir(7), and three equivalent Ir(6) atoms. In the fourth As site, As(4) is bonded in a 8-coordinate geometry to two equivalent Eu(1), two equivalent Eu(3), one Ir(7), one Ir(8), and two equivalent Ir(5) atoms. In the fifth As site, As(5) is bonded in a 9-coordinate geometry to two equivalent Eu(1), two equivalent Eu(2), one Ir(2), one Ir(7), and three equivalent Ir(4) atoms. In the sixth As site, As(6) is bonded in a 7-coordinate geometry to one Eu(4), two equivalent Eu(2), one Ir(1), one Ir(4), and two equivalent Ir(2) atoms. In the seventh As site, As(7) is bonded in a 7-coordinate geometry to one Eu(3), two equivalent Eu(4), one Ir(5), and three equivalent Ir(3) atoms. is represented by the CIF card [CIF]
data_Eu4As7Ir8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.115
_cell_length_b   13.106
_cell_length_c   13.622
_cell_angle_alpha   98.494
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   726.550
_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
  Eu  Eu0  1  0.750  0.213  0.565  1.0
  Eu  Eu1  1  0.250  0.787  0.435  1.0
  Eu  Eu2  1  0.750  0.514  0.709  1.0
  Eu  Eu3  1  0.250  0.486  0.291  1.0
  Eu  Eu4  1  0.750  0.286  0.896  1.0
  Eu  Eu5  1  0.250  0.714  0.104  1.0
  Eu  Eu6  1  0.750  0.102  0.206  1.0
  Eu  Eu7  1  0.250  0.898  0.794  1.0
  As  As8  1  0.750  0.743  0.919  1.0
  As  As9  1  0.250  0.257  0.081  1.0
  As  As10  1  0.750  0.906  0.587  1.0
  As  As11  1  0.250  0.094  0.413  1.0
  As  As12  1  0.750  0.530  0.127  1.0
  As  As13  1  0.250  0.470  0.873  1.0
  As  As14  1  0.750  0.848  0.280  1.0
  As  As15  1  0.250  0.152  0.720  1.0
  As  As16  1  0.750  0.609  0.437  1.0
  As  As17  1  0.250  0.391  0.563  1.0
  As  As18  1  0.750  0.311  0.311  1.0
  As  As19  1  0.250  0.689  0.689  1.0
  As  As20  1  0.750  0.058  0.900  1.0
  As  As21  1  0.250  0.942  0.100  1.0
  Ir  Ir22  1  0.750  0.343  0.138  1.0
  Ir  Ir23  1  0.250  0.657  0.862  1.0
  Ir  Ir24  1  0.750  0.722  0.602  1.0
  Ir  Ir25  1  0.250  0.278  0.398  1.0
  Ir  Ir26  1  0.750  0.920  0.002  1.0
  Ir  Ir27  1  0.250  0.080  0.998  1.0
  Ir  Ir28  1  0.750  0.425  0.471  1.0
  Ir  Ir29  1  0.250  0.575  0.529  1.0
  Ir  Ir30  1  0.750  0.056  0.721  1.0
  Ir  Ir31  1  0.250  0.944  0.279  1.0
  Ir  Ir32  1  0.750  0.553  0.951  1.0
  Ir  Ir33  1  0.250  0.447  0.049  1.0
  Ir  Ir34  1  0.750  0.664  0.272  1.0
  Ir  Ir35  1  0.250  0.336  0.728  1.0
  Ir  Ir36  1  0.750  0.986  0.427  1.0
  Ir  Ir37  1  0.250  0.014  0.573  1.0
[/CIF]
.