The compound described by (Zn4Si2O7(OH)2)2O2 crystallizes in the orthorhombic Pnn2 space group. The structure consists of two water atoms inside a Zn4Si2O7(OH)2 framework. In the Zn4Si2O7(OH)2 framework, there are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with three equivalent Si(1)O4 tetrahedra and corners with four equivalent Zn(2)O4 tetrahedra. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with three equivalent Si(1)O4 tetrahedra and corners with four equivalent Zn(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, and corners with three equivalent Zn(2)O4 tetrahedra. 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(5) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(1) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the third O site, O(2) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the fourth O site, O(3) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the fifth O site, O(4) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one H(1) atom. is represented by the CIF file [CIF]
data_Zn2SiHO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.177
_cell_length_b   8.461
_cell_length_c   10.812
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   473.567
_cell_formula_units_Z   4
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
  Zn  Zn0  1  0.496  0.737  0.355  1.0
  Zn  Zn1  1  0.496  0.263  0.645  1.0
  Zn  Zn2  1  0.996  0.763  0.855  1.0
  Zn  Zn3  1  0.996  0.237  0.145  1.0
  Zn  Zn4  1  0.993  0.828  0.175  1.0
  Zn  Zn5  1  0.993  0.172  0.825  1.0
  Zn  Zn6  1  0.493  0.672  0.675  1.0
  Zn  Zn7  1  0.493  0.328  0.325  1.0
  Si  Si8  1  0.004  0.526  0.355  1.0
  Si  Si9  1  0.004  0.474  0.645  1.0
  Si  Si10  1  0.504  0.974  0.855  1.0
  Si  Si11  1  0.504  0.026  0.145  1.0
  H  H12  1  0.671  0.885  0.535  1.0
  H  H13  1  0.671  0.115  0.465  1.0
  H  H14  1  0.171  0.615  0.035  1.0
  H  H15  1  0.171  0.385  0.965  1.0
  O  O16  1  0.132  0.695  0.312  1.0
  O  O17  1  0.132  0.305  0.688  1.0
  O  O18  1  0.632  0.805  0.812  1.0
  O  O19  1  0.632  0.195  0.188  1.0
  O  O20  1  0.633  0.878  0.223  1.0
  O  O21  1  0.633  0.122  0.777  1.0
  O  O22  1  0.133  0.622  0.723  1.0
  O  O23  1  0.133  0.378  0.277  1.0
  O  O24  1  0.690  0.531  0.336  1.0
  O  O25  1  0.690  0.469  0.664  1.0
  O  O26  1  0.190  0.969  0.836  1.0
  O  O27  1  0.190  0.031  0.164  1.0
  O  O28  1  0.540  0.801  0.526  1.0
  O  O29  1  0.540  0.199  0.474  1.0
  O  O30  1  0.040  0.699  0.026  1.0
  O  O31  1  0.040  0.301  0.974  1.0
  O  O32  1  0.092  0.500  0.500  1.0
  O  O33  1  0.592  0.000  0.000  1.0
  O  O34  1  0.003  0.000  0.500  1.0
  O  O35  1  0.503  0.500  0.000  1.0
[/CIF]
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The compound described by (Zn4Si2O7(OH)2)2O2 crystallizes in the orthorhombic Pnn2 space group. The structure consists of two water atoms inside a Zn4Si2O7(OH)2 framework. In the Zn4Si2O7(OH)2 framework, there are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with three equivalent Si(1)O4 tetrahedra and corners with four equivalent Zn(2)O4 tetrahedra. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with three equivalent Si(1)O4 tetrahedra and corners with four equivalent Zn(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, and corners with three equivalent Zn(2)O4 tetrahedra. 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(5) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(1) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the third O site, O(2) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the fourth O site, O(3) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the fifth O site, O(4) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one H(1) atom. is represented by the CIF file [CIF]
data_Zn2SiHO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.177
_cell_length_b   8.461
_cell_length_c   10.812
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   473.567
_cell_formula_units_Z   4
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
  Zn  Zn0  1  0.496  0.737  0.355  1.0
  Zn  Zn1  1  0.496  0.263  0.645  1.0
  Zn  Zn2  1  0.996  0.763  0.855  1.0
  Zn  Zn3  1  0.996  0.237  0.145  1.0
  Zn  Zn4  1  0.993  0.828  0.175  1.0
  Zn  Zn5  1  0.993  0.172  0.825  1.0
  Zn  Zn6  1  0.493  0.672  0.675  1.0
  Zn  Zn7  1  0.493  0.328  0.325  1.0
  Si  Si8  1  0.004  0.526  0.355  1.0
  Si  Si9  1  0.004  0.474  0.645  1.0
  Si  Si10  1  0.504  0.974  0.855  1.0
  Si  Si11  1  0.504  0.026  0.145  1.0
  H  H12  1  0.671  0.885  0.535  1.0
  H  H13  1  0.671  0.115  0.465  1.0
  H  H14  1  0.171  0.615  0.035  1.0
  H  H15  1  0.171  0.385  0.965  1.0
  O  O16  1  0.132  0.695  0.312  1.0
  O  O17  1  0.132  0.305  0.688  1.0
  O  O18  1  0.632  0.805  0.812  1.0
  O  O19  1  0.632  0.195  0.188  1.0
  O  O20  1  0.633  0.878  0.223  1.0
  O  O21  1  0.633  0.122  0.777  1.0
  O  O22  1  0.133  0.622  0.723  1.0
  O  O23  1  0.133  0.378  0.277  1.0
  O  O24  1  0.690  0.531  0.336  1.0
  O  O25  1  0.690  0.469  0.664  1.0
  O  O26  1  0.190  0.969  0.836  1.0
  O  O27  1  0.190  0.031  0.164  1.0
  O  O28  1  0.540  0.801  0.526  1.0
  O  O29  1  0.540  0.199  0.474  1.0
  O  O30  1  0.040  0.699  0.026  1.0
  O  O31  1  0.040  0.301  0.974  1.0
  O  O32  1  0.092  0.500  0.500  1.0
  O  O33  1  0.592  0.000  0.000  1.0
  O  O34  1  0.003  0.000  0.500  1.0
  O  O35  1  0.503  0.500  0.000  1.0
[/CIF]
.