data_Mg2H2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.1
_cell_length_b   3.1
_cell_length_c   7.54
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2H2O3
_chemical_formula_sum   'Mg2 H2 O3'
_cell_volume   62.71
_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  0.0  0.79  0.23  1.0
  Mg  Mg1  1  0.55  0.89  0.31  1.0
  H  H2  1  0.0  0.79  0.29  1.0
  H  H3  1  0.55  0.89  0.25  1.0
  O  O4  1  0.0  0.79  0.26  1.0
  O  O5  1  0.55  0.89  0.28  1.0
  O  O6  1  0.0  0.0  0.0  1.0

data_Mg2H2O3
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.1
_cell_length_b   3.1
_cell_length_c   7.54
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2H2O3
_chemical_formula_sum   'Mg2 H2 O3'
_cell_volume   62.71
_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  0.0  0.79  0.23  1.0
  Mg  Mg1  1  0.55  0.89  0.31  1.0
  H  H2  1  0.0  0.79  0.29  1.0
  H  H3  1  0.55  0.89  0.25  1.0
  O  O4  1  0.0  0.0  0.0  1.0
  O  O5  1  0.0  0.79  0.26  1.0
  O  O6  1  0.55  0.89  0.28  1.0

Mg Mg H H O O O
Mg(OH)2MgO is Cyanogen Chloride-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one MgHO2 cluster and one MgOH cluster. In the MgHO2 cluster, Mg(1) is bonded in a single-bond geometry to one O(1) and one O(3) atom. The Mg(1)-O(1) bond length is 0.21 Å. The Mg(1)-O(3) bond length is 1.84 Å. H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.24 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Mg(1) and one H(1) atom. In the second O site, O(3) is bonded in a single-bond geometry to one Mg(1) atom. In the MgOH cluster, Mg(2) is bonded in a single-bond geometry to one O(2) atom. The Mg(2)-O(2) bond length is 0.21 Å. H(2) is bonded in a single-bond geometry to one O(2) atom. The H(2)-O(2) bond length is 0.24 Å. O(2) is bonded in a linear geometry to one Mg(2) and one H(2) atom.