The material structure described by FeGaAs2 is Enargite-like structured and crystallizes in the orthorhombic Pna2_1 space group. Fe(1) is bonded to two equivalent As(1) and two equivalent As(2) atoms to form FeAs4 tetrahedra that share corners with four equivalent Fe(1)As4 tetrahedra and corners with eight equivalent Ga(1)As4 tetrahedra. Ga(1) is bonded to two equivalent As(1) and two equivalent As(2) atoms to form GaAs4 tetrahedra that share corners with four equivalent Ga(1)As4 tetrahedra and corners with eight equivalent Fe(1)As4 tetrahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded to two equivalent Fe(1) and two equivalent Ga(1) atoms to form corner-sharing AsGa2Fe2 tetrahedra. In the second As site, As(2) is bonded to two equivalent Fe(1) and two equivalent Ga(1) atoms to form corner-sharing AsGa2Fe2 tetrahedra. is represented by the CIF file [CIF]
data_GaFeAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.346
_cell_length_b   6.812
_cell_length_c   7.868
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   340.159
_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
  Ga  Ga0  1  0.007  0.583  0.374  1.0
  Ga  Ga1  1  0.507  0.417  0.626  1.0
  Ga  Ga2  1  0.507  0.917  0.874  1.0
  Ga  Ga3  1  0.007  0.083  0.126  1.0
  Fe  Fe4  1  0.001  0.584  0.877  1.0
  Fe  Fe5  1  0.501  0.916  0.377  1.0
  Fe  Fe6  1  0.001  0.084  0.623  1.0
  Fe  Fe7  1  0.501  0.416  0.123  1.0
  As  As8  1  0.407  0.095  0.146  1.0
  As  As9  1  0.407  0.595  0.354  1.0
  As  As10  1  0.907  0.905  0.854  1.0
  As  As11  1  0.907  0.405  0.646  1.0
  As  As12  1  0.858  0.429  0.106  1.0
  As  As13  1  0.358  0.571  0.894  1.0
  As  As14  1  0.358  0.071  0.606  1.0
  As  As15  1  0.858  0.929  0.394  1.0
[/CIF]
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The material structure described by FeGaAs2 is Enargite-like structured and crystallizes in the orthorhombic Pna2_1 space group. Fe(1) is bonded to two equivalent As(1) and two equivalent As(2) atoms to form FeAs4 tetrahedra that share corners with four equivalent Fe(1)As4 tetrahedra and corners with eight equivalent Ga(1)As4 tetrahedra. Ga(1) is bonded to two equivalent As(1) and two equivalent As(2) atoms to form GaAs4 tetrahedra that share corners with four equivalent Ga(1)As4 tetrahedra and corners with eight equivalent Fe(1)As4 tetrahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded to two equivalent Fe(1) and two equivalent Ga(1) atoms to form corner-sharing AsGa2Fe2 tetrahedra. In the second As site, As(2) is bonded to two equivalent Fe(1) and two equivalent Ga(1) atoms to form corner-sharing AsGa2Fe2 tetrahedra. is represented by the CIF file [CIF]
data_GaFeAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.346
_cell_length_b   6.812
_cell_length_c   7.868
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   340.159
_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
  Ga  Ga0  1  0.007  0.583  0.374  1.0
  Ga  Ga1  1  0.507  0.417  0.626  1.0
  Ga  Ga2  1  0.507  0.917  0.874  1.0
  Ga  Ga3  1  0.007  0.083  0.126  1.0
  Fe  Fe4  1  0.001  0.584  0.877  1.0
  Fe  Fe5  1  0.501  0.916  0.377  1.0
  Fe  Fe6  1  0.001  0.084  0.623  1.0
  Fe  Fe7  1  0.501  0.416  0.123  1.0
  As  As8  1  0.407  0.095  0.146  1.0
  As  As9  1  0.407  0.595  0.354  1.0
  As  As10  1  0.907  0.905  0.854  1.0
  As  As11  1  0.907  0.405  0.646  1.0
  As  As12  1  0.858  0.429  0.106  1.0
  As  As13  1  0.358  0.571  0.894  1.0
  As  As14  1  0.358  0.071  0.606  1.0
  As  As15  1  0.858  0.929  0.394  1.0
[/CIF]
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