The compound described by YH3 crystallizes in the hexagonal P6_3cm space group. Y(1) is bonded in a 11-coordinate geometry to one H(3), two equivalent H(4), four equivalent H(1), and four equivalent H(2) atoms. There are four inequivalent H sites. In the first H site, H(1) is bonded in a 4-coordinate geometry to four equivalent Y(1) atoms. In the second H site, H(2) is bonded to four equivalent Y(1) atoms to form distorted corner-sharing HY4 tetrahedra. In the third H site, H(3) is bonded in a trigonal planar geometry to three equivalent Y(1) atoms. In the fourth H site, H(4) is bonded in a trigonal planar geometry to three equivalent Y(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_YH3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.332
_cell_length_b   6.332
_cell_length_c   6.602
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   229.254
_cell_formula_units_Z   6
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
  Y  Y0  1  0.671  0.671  0.750  1.0
  Y  Y1  1  0.329  0.000  0.750  1.0
  Y  Y2  1  0.000  0.329  0.750  1.0
  Y  Y3  1  0.329  0.329  0.250  1.0
  Y  Y4  1  0.671  1.000  0.250  1.0
  Y  Y5  1  1.000  0.671  0.250  1.0
  H  H6  1  0.301  0.301  0.591  1.0
  H  H7  1  0.699  1.000  0.591  1.0
  H  H8  1  1.000  0.699  0.591  1.0
  H  H9  1  0.699  0.699  0.091  1.0
  H  H10  1  0.301  0.000  0.091  1.0
  H  H11  1  0.000  0.301  0.091  1.0
  H  H12  1  0.357  0.357  0.909  1.0
  H  H13  1  0.643  1.000  0.909  1.0
  H  H14  1  1.000  0.643  0.909  1.0
  H  H15  1  0.643  0.643  0.409  1.0
  H  H16  1  0.357  0.000  0.409  1.0
  H  H17  1  0.000  0.357  0.409  1.0
  H  H18  1  1.000  1.000  0.815  1.0
  H  H19  1  0.000  0.000  0.315  1.0
  H  H20  1  0.333  0.667  0.705  1.0
  H  H21  1  0.667  0.333  0.705  1.0
  H  H22  1  0.667  0.333  0.205  1.0
  H  H23  1  0.333  0.667  0.205  1.0
[/CIF]
.
The compound described by YH3 crystallizes in the hexagonal P6_3cm space group. Y(1) is bonded in a 11-coordinate geometry to one H(3), two equivalent H(4), four equivalent H(1), and four equivalent H(2) atoms. There are four inequivalent H sites. In the first H site, H(1) is bonded in a 4-coordinate geometry to four equivalent Y(1) atoms. In the second H site, H(2) is bonded to four equivalent Y(1) atoms to form distorted corner-sharing HY4 tetrahedra. In the third H site, H(3) is bonded in a trigonal planar geometry to three equivalent Y(1) atoms. In the fourth H site, H(4) is bonded in a trigonal planar geometry to three equivalent Y(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_YH3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.332
_cell_length_b   6.332
_cell_length_c   6.602
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   229.254
_cell_formula_units_Z   6
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
  Y  Y0  1  0.671  0.671  0.750  1.0
  Y  Y1  1  0.329  0.000  0.750  1.0
  Y  Y2  1  0.000  0.329  0.750  1.0
  Y  Y3  1  0.329  0.329  0.250  1.0
  Y  Y4  1  0.671  1.000  0.250  1.0
  Y  Y5  1  1.000  0.671  0.250  1.0
  H  H6  1  0.301  0.301  0.591  1.0
  H  H7  1  0.699  1.000  0.591  1.0
  H  H8  1  1.000  0.699  0.591  1.0
  H  H9  1  0.699  0.699  0.091  1.0
  H  H10  1  0.301  0.000  0.091  1.0
  H  H11  1  0.000  0.301  0.091  1.0
  H  H12  1  0.357  0.357  0.909  1.0
  H  H13  1  0.643  1.000  0.909  1.0
  H  H14  1  1.000  0.643  0.909  1.0
  H  H15  1  0.643  0.643  0.409  1.0
  H  H16  1  0.357  0.000  0.409  1.0
  H  H17  1  0.000  0.357  0.409  1.0
  H  H18  1  1.000  1.000  0.815  1.0
  H  H19  1  0.000  0.000  0.315  1.0
  H  H20  1  0.333  0.667  0.705  1.0
  H  H21  1  0.667  0.333  0.705  1.0
  H  H22  1  0.667  0.333  0.205  1.0
  H  H23  1  0.333  0.667  0.205  1.0
[/CIF]
.