The material described by Eu5As3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to six equivalent As(1) atoms to form a mixture of distorted face, corner, and edge-sharing EuAs6 octahedra. The corner-sharing octahedral tilt angles are 35°. In the second Eu site, Eu(2) is bonded in a 5-coordinate geometry to five equivalent As(1) atoms. As(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1) and five equivalent Eu(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu5As3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.871
_cell_length_b   8.834
_cell_length_c   8.834
_cell_angle_alpha   120.001
_cell_angle_beta   90.001
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   464.351
_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  0.500  0.333  0.667  1.0
  Eu  Eu1  1  0.500  0.667  0.333  1.0
  Eu  Eu2  1  0.000  0.667  0.333  1.0
  Eu  Eu3  1  0.000  0.333  0.667  1.0
  Eu  Eu4  1  0.750  0.256  0.000  1.0
  Eu  Eu5  1  0.750  0.744  0.744  1.0
  Eu  Eu6  1  0.750  1.000  0.256  1.0
  Eu  Eu7  1  0.250  0.744  1.000  1.0
  Eu  Eu8  1  0.250  0.256  0.256  1.0
  Eu  Eu9  1  0.250  1.000  0.744  1.0
  As  As10  1  0.750  0.610  0.000  1.0
  As  As11  1  0.750  0.389  0.389  1.0
  As  As12  1  0.750  1.000  0.611  1.0
  As  As13  1  0.250  0.389  0.000  1.0
  As  As14  1  0.250  0.611  0.611  1.0
  As  As15  1  0.250  0.000  0.389  1.0
[/CIF]
.
The material described by Eu5As3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to six equivalent As(1) atoms to form a mixture of distorted face, corner, and edge-sharing EuAs6 octahedra. The corner-sharing octahedral tilt angles are 35°. In the second Eu site, Eu(2) is bonded in a 5-coordinate geometry to five equivalent As(1) atoms. As(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1) and five equivalent Eu(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu5As3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.871
_cell_length_b   8.834
_cell_length_c   8.834
_cell_angle_alpha   120.001
_cell_angle_beta   90.001
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   464.351
_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  0.500  0.333  0.667  1.0
  Eu  Eu1  1  0.500  0.667  0.333  1.0
  Eu  Eu2  1  0.000  0.667  0.333  1.0
  Eu  Eu3  1  0.000  0.333  0.667  1.0
  Eu  Eu4  1  0.750  0.256  0.000  1.0
  Eu  Eu5  1  0.750  0.744  0.744  1.0
  Eu  Eu6  1  0.750  1.000  0.256  1.0
  Eu  Eu7  1  0.250  0.744  1.000  1.0
  Eu  Eu8  1  0.250  0.256  0.256  1.0
  Eu  Eu9  1  0.250  1.000  0.744  1.0
  As  As10  1  0.750  0.610  0.000  1.0
  As  As11  1  0.750  0.389  0.389  1.0
  As  As12  1  0.750  1.000  0.611  1.0
  As  As13  1  0.250  0.389  0.000  1.0
  As  As14  1  0.250  0.611  0.611  1.0
  As  As15  1  0.250  0.000  0.389  1.0
[/CIF]
.