The crystal structure described by MgU2Si2(HO3)4 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(5) atoms. U(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), and four equivalent O(3) atoms. Si(1) is bonded in a tetrahedral geometry to one O(2), one O(5), and two equivalent O(3) atoms. H(1) is bonded in a single-bond geometry to one O(4) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Mg(1) and one U(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one U(1) and one Si(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent U(1) and one Si(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one U(1) and two equivalent H(1) atoms. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mg(1) and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgU2Si2(HO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.634
_cell_length_b   6.816
_cell_length_c   9.668
_cell_angle_alpha   110.639
_cell_angle_beta   122.002
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   337.179
_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
  Mg  Mg0  1  0.000  0.000  0.000  1.0
  U  U1  1  0.372  0.761  0.522  1.0
  U  U2  1  0.628  0.239  0.478  1.0
  Si  Si3  1  0.917  0.811  0.623  1.0
  Si  Si4  1  0.083  0.189  0.377  1.0
  H  H5  1  0.609  0.514  0.799  1.0
  H  H6  1  0.391  0.486  0.201  1.0
  H  H7  1  0.391  0.715  0.201  1.0
  H  H8  1  0.609  0.285  0.799  1.0
  O  O9  1  0.607  0.889  0.778  1.0
  O  O10  1  0.393  0.111  0.222  1.0
  O  O11  1  0.952  0.243  0.486  1.0
  O  O12  1  0.048  0.757  0.514  1.0
  O  O13  1  0.713  0.588  0.544  1.0
  O  O14  1  0.287  0.412  0.456  1.0
  O  O15  1  0.287  0.043  0.456  1.0
  O  O16  1  0.713  0.957  0.544  1.0
  O  O17  1  0.694  0.397  0.794  1.0
  O  O18  1  0.306  0.603  0.206  1.0
  O  O19  1  0.094  0.917  0.835  1.0
  O  O20  1  0.906  0.083  0.165  1.0
[/CIF]
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The crystal structure described by MgU2Si2(HO3)4 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(5) atoms. U(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), and four equivalent O(3) atoms. Si(1) is bonded in a tetrahedral geometry to one O(2), one O(5), and two equivalent O(3) atoms. H(1) is bonded in a single-bond geometry to one O(4) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Mg(1) and one U(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one U(1) and one Si(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent U(1) and one Si(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one U(1) and two equivalent H(1) atoms. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mg(1) and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgU2Si2(HO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.634
_cell_length_b   6.816
_cell_length_c   9.668
_cell_angle_alpha   110.639
_cell_angle_beta   122.002
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   337.179
_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
  Mg  Mg0  1  0.000  0.000  0.000  1.0
  U  U1  1  0.372  0.761  0.522  1.0
  U  U2  1  0.628  0.239  0.478  1.0
  Si  Si3  1  0.917  0.811  0.623  1.0
  Si  Si4  1  0.083  0.189  0.377  1.0
  H  H5  1  0.609  0.514  0.799  1.0
  H  H6  1  0.391  0.486  0.201  1.0
  H  H7  1  0.391  0.715  0.201  1.0
  H  H8  1  0.609  0.285  0.799  1.0
  O  O9  1  0.607  0.889  0.778  1.0
  O  O10  1  0.393  0.111  0.222  1.0
  O  O11  1  0.952  0.243  0.486  1.0
  O  O12  1  0.048  0.757  0.514  1.0
  O  O13  1  0.713  0.588  0.544  1.0
  O  O14  1  0.287  0.412  0.456  1.0
  O  O15  1  0.287  0.043  0.456  1.0
  O  O16  1  0.713  0.957  0.544  1.0
  O  O17  1  0.694  0.397  0.794  1.0
  O  O18  1  0.306  0.603  0.206  1.0
  O  O19  1  0.094  0.917  0.835  1.0
  O  O20  1  0.906  0.083  0.165  1.0
[/CIF]
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