The structure described by NaMgSO7 crystallizes in the monoclinic P2_1/m space group. Na(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(5) atoms. Mg(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form distorted MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra and corners with two equivalent S(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. S(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 50°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Mg(1), and one S(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one S(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Na(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Na(1) and two equivalent Mg(1) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Mg(1), and one O(5) atom. is represented by the CIF card [CIF]
data_NaMgSO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.206
_cell_length_b   6.284
_cell_length_c   7.530
_cell_angle_alpha   69.545
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   319.504
_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  0.750  0.736  0.747  1.0
  Na  Na1  1  0.250  0.264  0.253  1.0
  Mg  Mg2  1  0.500  0.000  0.000  1.0
  Mg  Mg3  1  0.000  0.000  0.000  1.0
  S  S4  1  0.250  0.825  0.715  1.0
  S  S5  1  0.750  0.175  0.285  1.0
  O  O6  1  0.079  0.809  0.837  1.0
  O  O7  1  0.579  0.191  0.163  1.0
  O  O8  1  0.921  0.191  0.163  1.0
  O  O9  1  0.421  0.809  0.837  1.0
  O  O10  1  0.250  0.638  0.642  1.0
  O  O11  1  0.750  0.362  0.358  1.0
  O  O12  1  0.250  0.051  0.563  1.0
  O  O13  1  0.750  0.949  0.437  1.0
  O  O14  1  0.750  0.873  0.993  1.0
  O  O15  1  0.250  0.127  0.007  1.0
  O  O16  1  0.836  0.314  0.746  1.0
  O  O17  1  0.336  0.686  0.254  1.0
  O  O18  1  0.164  0.686  0.254  1.0
  O  O19  1  0.664  0.314  0.746  1.0
[/CIF]
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The structure described by NaMgSO7 crystallizes in the monoclinic P2_1/m space group. Na(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(5) atoms. Mg(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form distorted MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra and corners with two equivalent S(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. S(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 50°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Mg(1), and one S(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one S(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Na(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Na(1) and two equivalent Mg(1) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Mg(1), and one O(5) atom. is represented by the CIF card [CIF]
data_NaMgSO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.206
_cell_length_b   6.284
_cell_length_c   7.530
_cell_angle_alpha   69.545
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   319.504
_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  0.750  0.736  0.747  1.0
  Na  Na1  1  0.250  0.264  0.253  1.0
  Mg  Mg2  1  0.500  0.000  0.000  1.0
  Mg  Mg3  1  0.000  0.000  0.000  1.0
  S  S4  1  0.250  0.825  0.715  1.0
  S  S5  1  0.750  0.175  0.285  1.0
  O  O6  1  0.079  0.809  0.837  1.0
  O  O7  1  0.579  0.191  0.163  1.0
  O  O8  1  0.921  0.191  0.163  1.0
  O  O9  1  0.421  0.809  0.837  1.0
  O  O10  1  0.250  0.638  0.642  1.0
  O  O11  1  0.750  0.362  0.358  1.0
  O  O12  1  0.250  0.051  0.563  1.0
  O  O13  1  0.750  0.949  0.437  1.0
  O  O14  1  0.750  0.873  0.993  1.0
  O  O15  1  0.250  0.127  0.007  1.0
  O  O16  1  0.836  0.314  0.746  1.0
  O  O17  1  0.336  0.686  0.254  1.0
  O  O18  1  0.164  0.686  0.254  1.0
  O  O19  1  0.664  0.314  0.746  1.0
[/CIF]
.