The material described by FeAs is Modderite structured and crystallizes in the monoclinic P2_1/m space group. Fe(1,2) is bonded in a 6-coordinate geometry to six equivalent As(1,2) atoms. As(1,2) is bonded in a 6-coordinate geometry to six equivalent Fe(1,2) atoms. is represented by the CIF card [CIF]
data_FeAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.394
_cell_length_b   5.579
_cell_length_c   6.024
_cell_angle_alpha   90.064
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   114.066
_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
  Fe  Fe0  1  0.750  0.991  0.812  1.0
  Fe  Fe1  1  0.250  0.009  0.188  1.0
  Fe  Fe2  1  0.750  0.492  0.688  1.0
  Fe  Fe3  1  0.250  0.508  0.312  1.0
  As  As4  1  0.750  0.806  0.420  1.0
  As  As5  1  0.250  0.194  0.580  1.0
  As  As6  1  0.750  0.306  0.080  1.0
  As  As7  1  0.250  0.694  0.920  1.0
[/CIF]
.
The material described by FeAs is Modderite structured and crystallizes in the monoclinic P2_1/m space group. Fe(1,2) is bonded in a 6-coordinate geometry to six equivalent As(1,2) atoms. As(1,2) is bonded in a 6-coordinate geometry to six equivalent Fe(1,2) atoms. is represented by the CIF card [CIF]
data_FeAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.394
_cell_length_b   5.579
_cell_length_c   6.024
_cell_angle_alpha   90.064
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   114.066
_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
  Fe  Fe0  1  0.750  0.991  0.812  1.0
  Fe  Fe1  1  0.250  0.009  0.188  1.0
  Fe  Fe2  1  0.750  0.492  0.688  1.0
  Fe  Fe3  1  0.250  0.508  0.312  1.0
  As  As4  1  0.750  0.806  0.420  1.0
  As  As5  1  0.250  0.194  0.580  1.0
  As  As6  1  0.750  0.306  0.080  1.0
  As  As7  1  0.250  0.694  0.920  1.0
[/CIF]
.