The material described by EuAs is Modderite-like structured and crystallizes in the hexagonal P-6m2 space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 6-coordinate geometry to six equivalent As(1) atoms. In the second Eu site, Eu(2) is bonded in a 6-coordinate geometry to six equivalent As(1) atoms. As(1) is bonded to three equivalent Eu(1) and three equivalent Eu(2) atoms to form a mixture of distorted face, corner, and edge-sharing AsEu6 octahedra. The corner-sharing octahedral tilt angles are 51°. is represented by the CIF card [CIF]
data_EuAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.619
_cell_length_b   4.619
_cell_length_c   6.209
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   114.719
_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  0.333  0.667  0.500  1.0
  Eu  Eu1  1  0.667  0.333  0.000  1.0
  As  As2  1  0.000  0.000  0.754  1.0
  As  As3  1  0.000  0.000  0.246  1.0
[/CIF]
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The material described by EuAs is Modderite-like structured and crystallizes in the hexagonal P-6m2 space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 6-coordinate geometry to six equivalent As(1) atoms. In the second Eu site, Eu(2) is bonded in a 6-coordinate geometry to six equivalent As(1) atoms. As(1) is bonded to three equivalent Eu(1) and three equivalent Eu(2) atoms to form a mixture of distorted face, corner, and edge-sharing AsEu6 octahedra. The corner-sharing octahedral tilt angles are 51°. is represented by the CIF card [CIF]
data_EuAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.619
_cell_length_b   4.619
_cell_length_c   6.209
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   114.719
_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  0.333  0.667  0.500  1.0
  Eu  Eu1  1  0.667  0.333  0.000  1.0
  As  As2  1  0.000  0.000  0.754  1.0
  As  As3  1  0.000  0.000  0.246  1.0
[/CIF]
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