The structure described by FeH4 crystallizes in the monoclinic P2_1/m space group. Fe(1) is bonded in a 9-coordinate geometry to three equivalent H(2), four equivalent H(1), and four equivalent H(3) atoms. There are three inequivalent H sites. In the first H site, H(3) is bonded in a distorted square co-planar geometry to four equivalent Fe(1) atoms. In the second H site, H(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Fe(1) atoms. In the third H site, H(2) is bonded in a 3-coordinate geometry to three equivalent Fe(1) atoms. is represented by the CIF card [CIF]
data_FeH4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.688
_cell_length_b   2.897
_cell_length_c   4.179
_cell_angle_alpha   77.709
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   43.619
_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
  Fe  Fe0  1  0.250  0.503  0.764  1.0
  Fe  Fe1  1  0.750  0.497  0.236  1.0
  H  H2  1  0.501  0.206  0.569  1.0
  H  H3  1  0.001  0.794  0.431  1.0
  H  H4  1  0.499  0.794  0.431  1.0
  H  H5  1  0.999  0.206  0.569  1.0
  H  H6  1  0.750  0.547  0.850  1.0
  H  H7  1  0.250  0.453  0.150  1.0
  H  H8  1  0.500  0.000  0.000  1.0
  H  H9  1  0.000  0.000  0.000  1.0
[/CIF]
.
The structure described by FeH4 crystallizes in the monoclinic P2_1/m space group. Fe(1) is bonded in a 9-coordinate geometry to three equivalent H(2), four equivalent H(1), and four equivalent H(3) atoms. There are three inequivalent H sites. In the first H site, H(3) is bonded in a distorted square co-planar geometry to four equivalent Fe(1) atoms. In the second H site, H(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Fe(1) atoms. In the third H site, H(2) is bonded in a 3-coordinate geometry to three equivalent Fe(1) atoms. is represented by the CIF card [CIF]
data_FeH4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.688
_cell_length_b   2.897
_cell_length_c   4.179
_cell_angle_alpha   77.709
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   43.619
_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
  Fe  Fe0  1  0.250  0.503  0.764  1.0
  Fe  Fe1  1  0.750  0.497  0.236  1.0
  H  H2  1  0.501  0.206  0.569  1.0
  H  H3  1  0.001  0.794  0.431  1.0
  H  H4  1  0.499  0.794  0.431  1.0
  H  H5  1  0.999  0.206  0.569  1.0
  H  H6  1  0.750  0.547  0.850  1.0
  H  H7  1  0.250  0.453  0.150  1.0
  H  H8  1  0.500  0.000  0.000  1.0
  H  H9  1  0.000  0.000  0.000  1.0
[/CIF]
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