The compound described by Na2MgH8(SO6)2 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded to one O(2), one O(3), one O(4), one O(6), and two equivalent O(1) atoms to form distorted NaO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent S(1)O4 tetrahedra, and  an edgeedge with one Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-67°. Mg(1) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form MgO6 octahedra that share corners with four equivalent Na(1)O6 octahedra and corners with two equivalent S(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-67°. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(3) and one O(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) and one O(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(6) atom. S(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form SO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra and corners with four equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-63°. There are six inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one Mg(1) and one S(1) atom. In the second O site, O(6) is bonded in a distorted water-like geometry to one Na(1), one Mg(1), one H(2), and one H(4) atom. In the third O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one S(1) atom. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one H(3), and one S(1) atom. In the fifth O site, O(3) is bonded in a distorted water-like geometry to one Na(1), one Mg(1), one H(1), and one H(3) atom. In the sixth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one H(1), and one S(1) atom. is represented by the CIF card [CIF]
data_Na2MgH8(SO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.366
_cell_length_b   5.563
_cell_length_c   11.224
_cell_angle_alpha   79.687
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   513.927
_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
  Na  Na0  1  0.428  0.123  0.139  1.0
  Na  Na1  1  0.072  0.123  0.639  1.0
  Na  Na2  1  0.928  0.877  0.361  1.0
  Na  Na3  1  0.572  0.877  0.861  1.0
  Mg  Mg4  1  0.000  0.000  0.000  1.0
  Mg  Mg5  1  0.500  0.000  0.500  1.0
  H  H6  1  0.448  0.236  0.682  1.0
  H  H7  1  0.776  0.239  0.484  1.0
  H  H8  1  0.863  0.228  0.155  1.0
  H  H9  1  0.724  0.239  0.984  1.0
  H  H10  1  0.363  0.772  0.345  1.0
  H  H11  1  0.698  0.330  0.359  1.0
  H  H12  1  0.552  0.764  0.318  1.0
  H  H13  1  0.948  0.764  0.818  1.0
  H  H14  1  0.224  0.761  0.516  1.0
  H  H15  1  0.052  0.236  0.182  1.0
  H  H16  1  0.802  0.330  0.859  1.0
  H  H17  1  0.198  0.670  0.141  1.0
  H  H18  1  0.302  0.670  0.641  1.0
  H  H19  1  0.276  0.761  0.016  1.0
  H  H20  1  0.637  0.228  0.655  1.0
  H  H21  1  0.137  0.772  0.845  1.0
  S  S22  1  0.209  0.376  0.364  1.0
  S  S23  1  0.791  0.624  0.636  1.0
  S  S24  1  0.291  0.376  0.864  1.0
  S  S25  1  0.709  0.624  0.136  1.0
  O  O26  1  0.422  0.219  0.921  1.0
  O  O27  1  0.177  0.639  0.373  1.0
  O  O28  1  0.464  0.870  0.338  1.0
  O  O29  1  0.922  0.781  0.579  1.0
  O  O30  1  0.964  0.130  0.162  1.0
  O  O31  1  0.221  0.362  0.232  1.0
  O  O32  1  0.779  0.638  0.768  1.0
  O  O33  1  0.677  0.361  0.127  1.0
  O  O34  1  0.823  0.361  0.627  1.0
  O  O35  1  0.721  0.638  0.268  1.0
  O  O36  1  0.036  0.870  0.838  1.0
  O  O37  1  0.323  0.639  0.873  1.0
  O  O38  1  0.578  0.781  0.079  1.0
  O  O39  1  0.078  0.219  0.421  1.0
  O  O40  1  0.864  0.695  0.075  1.0
  O  O41  1  0.536  0.130  0.662  1.0
  O  O42  1  0.711  0.181  0.422  1.0
  O  O43  1  0.279  0.362  0.732  1.0
  O  O44  1  0.211  0.819  0.078  1.0
  O  O45  1  0.289  0.819  0.578  1.0
  O  O46  1  0.636  0.695  0.575  1.0
  O  O47  1  0.364  0.305  0.425  1.0
  O  O48  1  0.136  0.305  0.925  1.0
  O  O49  1  0.789  0.181  0.922  1.0
[/CIF]
.
The compound described by Na2MgH8(SO6)2 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded to one O(2), one O(3), one O(4), one O(6), and two equivalent O(1) atoms to form distorted NaO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent S(1)O4 tetrahedra, and  an edgeedge with one Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-67°. Mg(1) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form MgO6 octahedra that share corners with four equivalent Na(1)O6 octahedra and corners with two equivalent S(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-67°. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(3) and one O(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) and one O(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(6) atom. S(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form SO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra and corners with four equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-63°. There are six inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one Mg(1) and one S(1) atom. In the second O site, O(6) is bonded in a distorted water-like geometry to one Na(1), one Mg(1), one H(2), and one H(4) atom. In the third O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one S(1) atom. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one H(3), and one S(1) atom. In the fifth O site, O(3) is bonded in a distorted water-like geometry to one Na(1), one Mg(1), one H(1), and one H(3) atom. In the sixth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one H(1), and one S(1) atom. is represented by the CIF card [CIF]
data_Na2MgH8(SO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.366
_cell_length_b   5.563
_cell_length_c   11.224
_cell_angle_alpha   79.687
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   513.927
_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
  Na  Na0  1  0.428  0.123  0.139  1.0
  Na  Na1  1  0.072  0.123  0.639  1.0
  Na  Na2  1  0.928  0.877  0.361  1.0
  Na  Na3  1  0.572  0.877  0.861  1.0
  Mg  Mg4  1  0.000  0.000  0.000  1.0
  Mg  Mg5  1  0.500  0.000  0.500  1.0
  H  H6  1  0.448  0.236  0.682  1.0
  H  H7  1  0.776  0.239  0.484  1.0
  H  H8  1  0.863  0.228  0.155  1.0
  H  H9  1  0.724  0.239  0.984  1.0
  H  H10  1  0.363  0.772  0.345  1.0
  H  H11  1  0.698  0.330  0.359  1.0
  H  H12  1  0.552  0.764  0.318  1.0
  H  H13  1  0.948  0.764  0.818  1.0
  H  H14  1  0.224  0.761  0.516  1.0
  H  H15  1  0.052  0.236  0.182  1.0
  H  H16  1  0.802  0.330  0.859  1.0
  H  H17  1  0.198  0.670  0.141  1.0
  H  H18  1  0.302  0.670  0.641  1.0
  H  H19  1  0.276  0.761  0.016  1.0
  H  H20  1  0.637  0.228  0.655  1.0
  H  H21  1  0.137  0.772  0.845  1.0
  S  S22  1  0.209  0.376  0.364  1.0
  S  S23  1  0.791  0.624  0.636  1.0
  S  S24  1  0.291  0.376  0.864  1.0
  S  S25  1  0.709  0.624  0.136  1.0
  O  O26  1  0.422  0.219  0.921  1.0
  O  O27  1  0.177  0.639  0.373  1.0
  O  O28  1  0.464  0.870  0.338  1.0
  O  O29  1  0.922  0.781  0.579  1.0
  O  O30  1  0.964  0.130  0.162  1.0
  O  O31  1  0.221  0.362  0.232  1.0
  O  O32  1  0.779  0.638  0.768  1.0
  O  O33  1  0.677  0.361  0.127  1.0
  O  O34  1  0.823  0.361  0.627  1.0
  O  O35  1  0.721  0.638  0.268  1.0
  O  O36  1  0.036  0.870  0.838  1.0
  O  O37  1  0.323  0.639  0.873  1.0
  O  O38  1  0.578  0.781  0.079  1.0
  O  O39  1  0.078  0.219  0.421  1.0
  O  O40  1  0.864  0.695  0.075  1.0
  O  O41  1  0.536  0.130  0.662  1.0
  O  O42  1  0.711  0.181  0.422  1.0
  O  O43  1  0.279  0.362  0.732  1.0
  O  O44  1  0.211  0.819  0.078  1.0
  O  O45  1  0.289  0.819  0.578  1.0
  O  O46  1  0.636  0.695  0.575  1.0
  O  O47  1  0.364  0.305  0.425  1.0
  O  O48  1  0.136  0.305  0.925  1.0
  O  O49  1  0.789  0.181  0.922  1.0
[/CIF]
.