The material described by Ge7(H2O11)2 crystallizes in the trigonal R3m space group. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form distorted GeO6 octahedra that share corners with three equivalent Ge(3)O4 tetrahedra,  an edgeedge with one Ge(2)O6 octahedra, and edges with two equivalent Ge(1)O6 octahedra. In the second Ge site, Ge(2) is bonded to three equivalent O(2) and three equivalent O(5) atoms to form GeO6 octahedra that share corners with three equivalent Ge(3)O4 tetrahedra and edges with three equivalent Ge(1)O6 octahedra. In the third Ge site, Ge(3) is bonded to one O(4), one O(5), and two equivalent O(3) atoms to form corner-sharing GeO4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-51°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a linear geometry to one O(2) and one O(7) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to three equivalent Ge(1) and one H(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Ge(2), two equivalent Ge(1), and one H(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(3) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ge(2) and one Ge(3) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one O(7) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one H(2) and one O(6) atom. is represented by the CIF card [CIF]
data_Ge7(H2O11)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.905
_cell_length_b   7.905
_cell_length_c   7.905
_cell_angle_alpha   89.699
_cell_angle_beta   89.699
_cell_angle_gamma   89.699
_symmetry_Int_Tables_number   1
_cell_volume   493.994
_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
  Ge  Ge0  1  0.146  0.839  0.146  1.0
  Ge  Ge1  1  0.839  0.146  0.146  1.0
  Ge  Ge2  1  0.146  0.146  0.839  1.0
  Ge  Ge3  1  0.854  0.854  0.854  1.0
  Ge  Ge4  1  0.493  0.997  0.997  1.0
  Ge  Ge5  1  0.997  0.997  0.493  1.0
  Ge  Ge6  1  0.997  0.493  0.997  1.0
  H  H7  1  0.179  0.179  0.179  1.0
  H  H8  1  0.799  0.799  0.177  1.0
  H  H9  1  0.177  0.799  0.799  1.0
  H  H10  1  0.799  0.177  0.799  1.0
  O  O11  1  0.107  0.107  0.107  1.0
  O  O12  1  0.883  0.883  0.109  1.0
  O  O13  1  0.109  0.883  0.883  1.0
  O  O14  1  0.883  0.109  0.883  1.0
  O  O15  1  0.371  0.863  0.126  1.0
  O  O16  1  0.126  0.863  0.371  1.0
  O  O17  1  0.127  0.614  0.127  1.0
  O  O18  1  0.614  0.127  0.127  1.0
  O  O19  1  0.863  0.126  0.371  1.0
  O  O20  1  0.863  0.371  0.126  1.0
  O  O21  1  0.371  0.126  0.863  1.0
  O  O22  1  0.127  0.127  0.614  1.0
  O  O23  1  0.126  0.371  0.863  1.0
  O  O24  1  0.623  0.866  0.866  1.0
  O  O25  1  0.866  0.866  0.623  1.0
  O  O26  1  0.866  0.623  0.866  1.0
  O  O27  1  0.595  0.023  0.595  1.0
  O  O28  1  0.023  0.595  0.595  1.0
  O  O29  1  0.595  0.595  0.023  1.0
  O  O30  1  0.678  0.678  0.251  1.0
  O  O31  1  0.251  0.678  0.678  1.0
  O  O32  1  0.678  0.251  0.678  1.0
[/CIF]
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The material described by Ge7(H2O11)2 crystallizes in the trigonal R3m space group. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form distorted GeO6 octahedra that share corners with three equivalent Ge(3)O4 tetrahedra,  an edgeedge with one Ge(2)O6 octahedra, and edges with two equivalent Ge(1)O6 octahedra. In the second Ge site, Ge(2) is bonded to three equivalent O(2) and three equivalent O(5) atoms to form GeO6 octahedra that share corners with three equivalent Ge(3)O4 tetrahedra and edges with three equivalent Ge(1)O6 octahedra. In the third Ge site, Ge(3) is bonded to one O(4), one O(5), and two equivalent O(3) atoms to form corner-sharing GeO4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-51°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a linear geometry to one O(2) and one O(7) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to three equivalent Ge(1) and one H(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Ge(2), two equivalent Ge(1), and one H(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(3) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ge(2) and one Ge(3) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one O(7) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one H(2) and one O(6) atom. is represented by the CIF card [CIF]
data_Ge7(H2O11)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.905
_cell_length_b   7.905
_cell_length_c   7.905
_cell_angle_alpha   89.699
_cell_angle_beta   89.699
_cell_angle_gamma   89.699
_symmetry_Int_Tables_number   1
_cell_volume   493.994
_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
  Ge  Ge0  1  0.146  0.839  0.146  1.0
  Ge  Ge1  1  0.839  0.146  0.146  1.0
  Ge  Ge2  1  0.146  0.146  0.839  1.0
  Ge  Ge3  1  0.854  0.854  0.854  1.0
  Ge  Ge4  1  0.493  0.997  0.997  1.0
  Ge  Ge5  1  0.997  0.997  0.493  1.0
  Ge  Ge6  1  0.997  0.493  0.997  1.0
  H  H7  1  0.179  0.179  0.179  1.0
  H  H8  1  0.799  0.799  0.177  1.0
  H  H9  1  0.177  0.799  0.799  1.0
  H  H10  1  0.799  0.177  0.799  1.0
  O  O11  1  0.107  0.107  0.107  1.0
  O  O12  1  0.883  0.883  0.109  1.0
  O  O13  1  0.109  0.883  0.883  1.0
  O  O14  1  0.883  0.109  0.883  1.0
  O  O15  1  0.371  0.863  0.126  1.0
  O  O16  1  0.126  0.863  0.371  1.0
  O  O17  1  0.127  0.614  0.127  1.0
  O  O18  1  0.614  0.127  0.127  1.0
  O  O19  1  0.863  0.126  0.371  1.0
  O  O20  1  0.863  0.371  0.126  1.0
  O  O21  1  0.371  0.126  0.863  1.0
  O  O22  1  0.127  0.127  0.614  1.0
  O  O23  1  0.126  0.371  0.863  1.0
  O  O24  1  0.623  0.866  0.866  1.0
  O  O25  1  0.866  0.866  0.623  1.0
  O  O26  1  0.866  0.623  0.866  1.0
  O  O27  1  0.595  0.023  0.595  1.0
  O  O28  1  0.023  0.595  0.595  1.0
  O  O29  1  0.595  0.595  0.023  1.0
  O  O30  1  0.678  0.678  0.251  1.0
  O  O31  1  0.251  0.678  0.678  1.0
  O  O32  1  0.678  0.251  0.678  1.0
[/CIF]
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