The crystal structure described by EuMg2H6 crystallizes in the tetragonal P4/mmm space group. Mg(1) is bonded in a 6-coordinate geometry to one H(2), one H(3), and four equivalent H(1) atoms. Eu(1) is bonded to four equivalent H(2) and eight equivalent H(1) atoms to form a mixture of corner and face-sharing EuH12 cuboctahedra. There are three inequivalent H sites. In the first H site, H(1) is bonded in a 4-coordinate geometry to two equivalent Mg(1) and two equivalent Eu(1) atoms. In the second H site, H(2) is bonded to two equivalent Mg(1) and four equivalent Eu(1) atoms to form a mixture of corner and edge-sharing HEu4Mg2 octahedra. The corner-sharing octahedra are not tilted. In the third H site, H(3) is bonded in a linear geometry to two equivalent Mg(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu(MgH3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.728
_cell_length_b   3.728
_cell_length_c   7.970
_cell_angle_alpha   90.001
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   110.742
_cell_formula_units_Z   1
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  1.000  0.000  1.000  1.0
  Mg  Mg1  1  0.500  0.500  0.726  1.0
  Mg  Mg2  1  0.500  0.500  0.274  1.0
  H  H3  1  0.500  1.000  0.792  1.0
  H  H4  1  0.000  0.500  0.792  1.0
  H  H5  1  0.500  0.000  0.208  1.0
  H  H6  1  1.000  0.500  0.208  1.0
  H  H7  1  0.500  0.500  0.000  1.0
  H  H8  1  0.500  0.500  0.500  1.0
[/CIF]
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The crystal structure described by EuMg2H6 crystallizes in the tetragonal P4/mmm space group. Mg(1) is bonded in a 6-coordinate geometry to one H(2), one H(3), and four equivalent H(1) atoms. Eu(1) is bonded to four equivalent H(2) and eight equivalent H(1) atoms to form a mixture of corner and face-sharing EuH12 cuboctahedra. There are three inequivalent H sites. In the first H site, H(1) is bonded in a 4-coordinate geometry to two equivalent Mg(1) and two equivalent Eu(1) atoms. In the second H site, H(2) is bonded to two equivalent Mg(1) and four equivalent Eu(1) atoms to form a mixture of corner and edge-sharing HEu4Mg2 octahedra. The corner-sharing octahedra are not tilted. In the third H site, H(3) is bonded in a linear geometry to two equivalent Mg(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu(MgH3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.728
_cell_length_b   3.728
_cell_length_c   7.970
_cell_angle_alpha   90.001
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   110.742
_cell_formula_units_Z   1
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  1.000  0.000  1.000  1.0
  Mg  Mg1  1  0.500  0.500  0.726  1.0
  Mg  Mg2  1  0.500  0.500  0.274  1.0
  H  H3  1  0.500  1.000  0.792  1.0
  H  H4  1  0.000  0.500  0.792  1.0
  H  H5  1  0.500  0.000  0.208  1.0
  H  H6  1  1.000  0.500  0.208  1.0
  H  H7  1  0.500  0.500  0.000  1.0
  H  H8  1  0.500  0.500  0.500  1.0
[/CIF]
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