The crystal structure described by Ge2(WO3)9 crystallizes in the monoclinic C2/m space group. There are four inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(7) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 5-27°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(6) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 0-46°. In the third W site, W(3) is bonded to two equivalent O(8) and four equivalent O(3) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 2-27°. In the fourth W site, W(4) is bonded to one O(8), one O(9), two equivalent O(4), and two equivalent O(5) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 0-46°. Ge(1) is bonded in an L-shaped geometry to two equivalent O(5) atoms. There are nine inequivalent O sites. In the first O site, O(8) is bonded in a linear geometry to one W(3) and one W(4) atom. In the second O site, O(9) is bonded in a linear geometry to two equivalent W(4) atoms. In the third O site, O(1) is bonded in a linear geometry to one W(1) and one W(2) atom. In the fourth O site, O(2) is bonded in a linear geometry to two equivalent W(2) atoms. In the fifth O site, O(3) is bonded in a bent 150 degrees geometry to one W(1) and one W(3) atom. In the sixth O site, O(4) is bonded in a bent 150 degrees geometry to one W(2) and one W(4) atom. In the seventh O site, O(5) is bonded in a distorted trigonal planar geometry to one W(2), one W(4), and one Ge(1) atom. In the eighth O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent W(2) atoms. In the ninth O site, O(7) is bonded in a bent 150 degrees geometry to two equivalent W(1) atoms. is represented by the CIF file [CIF]
data_Ge2(WO3)9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.597
_cell_length_b   7.597
_cell_length_c   11.590
_cell_angle_alpha   89.970
_cell_angle_beta   89.970
_cell_angle_gamma   119.997
_symmetry_Int_Tables_number   1
_cell_volume   579.340
_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  0.897  0.897  0.340  1.0
  Ge  Ge1  1  0.103  0.103  0.660  1.0
  W  W2  1  0.000  0.500  0.000  1.0
  W  W3  1  0.006  0.492  0.333  1.0
  W  W4  1  0.994  0.508  0.667  1.0
  W  W5  1  0.492  0.006  0.333  1.0
  W  W6  1  0.500  0.000  0.000  1.0
  W  W7  1  0.508  0.994  0.667  1.0
  W  W8  1  0.500  0.500  0.000  1.0
  W  W9  1  0.505  0.505  0.667  1.0
  W  W10  1  0.495  0.495  0.333  1.0
  O  O11  1  0.997  0.501  0.169  1.0
  O  O12  1  0.000  0.500  0.500  1.0
  O  O13  1  0.003  0.499  0.831  1.0
  O  O14  1  0.785  0.570  0.999  1.0
  O  O15  1  0.797  0.585  0.665  1.0
  O  O16  1  0.813  0.618  0.336  1.0
  O  O17  1  0.781  0.217  0.666  1.0
  O  O18  1  0.783  0.219  0.334  1.0
  O  O19  1  0.785  0.215  0.000  1.0
  O  O20  1  0.430  0.215  0.001  1.0
  O  O21  1  0.415  0.203  0.335  1.0
  O  O22  1  0.382  0.187  0.664  1.0
  O  O23  1  0.499  0.003  0.831  1.0
  O  O24  1  0.501  0.997  0.169  1.0
  O  O25  1  0.500  0.000  0.500  1.0
  O  O26  1  0.570  0.785  0.999  1.0
  O  O27  1  0.618  0.813  0.336  1.0
  O  O28  1  0.585  0.797  0.665  1.0
  O  O29  1  0.499  0.499  0.830  1.0
  O  O30  1  0.501  0.501  0.170  1.0
  O  O31  1  0.500  0.500  0.500  1.0
  O  O32  1  0.215  0.785  0.000  1.0
  O  O33  1  0.219  0.783  0.334  1.0
  O  O34  1  0.217  0.781  0.666  1.0
  O  O35  1  0.203  0.415  0.335  1.0
  O  O36  1  0.215  0.430  0.001  1.0
  O  O37  1  0.187  0.382  0.664  1.0
[/CIF]
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The crystal structure described by Ge2(WO3)9 crystallizes in the monoclinic C2/m space group. There are four inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(7) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 5-27°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(6) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 0-46°. In the third W site, W(3) is bonded to two equivalent O(8) and four equivalent O(3) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 2-27°. In the fourth W site, W(4) is bonded to one O(8), one O(9), two equivalent O(4), and two equivalent O(5) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 0-46°. Ge(1) is bonded in an L-shaped geometry to two equivalent O(5) atoms. There are nine inequivalent O sites. In the first O site, O(8) is bonded in a linear geometry to one W(3) and one W(4) atom. In the second O site, O(9) is bonded in a linear geometry to two equivalent W(4) atoms. In the third O site, O(1) is bonded in a linear geometry to one W(1) and one W(2) atom. In the fourth O site, O(2) is bonded in a linear geometry to two equivalent W(2) atoms. In the fifth O site, O(3) is bonded in a bent 150 degrees geometry to one W(1) and one W(3) atom. In the sixth O site, O(4) is bonded in a bent 150 degrees geometry to one W(2) and one W(4) atom. In the seventh O site, O(5) is bonded in a distorted trigonal planar geometry to one W(2), one W(4), and one Ge(1) atom. In the eighth O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent W(2) atoms. In the ninth O site, O(7) is bonded in a bent 150 degrees geometry to two equivalent W(1) atoms. is represented by the CIF file [CIF]
data_Ge2(WO3)9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.597
_cell_length_b   7.597
_cell_length_c   11.590
_cell_angle_alpha   89.970
_cell_angle_beta   89.970
_cell_angle_gamma   119.997
_symmetry_Int_Tables_number   1
_cell_volume   579.340
_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  0.897  0.897  0.340  1.0
  Ge  Ge1  1  0.103  0.103  0.660  1.0
  W  W2  1  0.000  0.500  0.000  1.0
  W  W3  1  0.006  0.492  0.333  1.0
  W  W4  1  0.994  0.508  0.667  1.0
  W  W5  1  0.492  0.006  0.333  1.0
  W  W6  1  0.500  0.000  0.000  1.0
  W  W7  1  0.508  0.994  0.667  1.0
  W  W8  1  0.500  0.500  0.000  1.0
  W  W9  1  0.505  0.505  0.667  1.0
  W  W10  1  0.495  0.495  0.333  1.0
  O  O11  1  0.997  0.501  0.169  1.0
  O  O12  1  0.000  0.500  0.500  1.0
  O  O13  1  0.003  0.499  0.831  1.0
  O  O14  1  0.785  0.570  0.999  1.0
  O  O15  1  0.797  0.585  0.665  1.0
  O  O16  1  0.813  0.618  0.336  1.0
  O  O17  1  0.781  0.217  0.666  1.0
  O  O18  1  0.783  0.219  0.334  1.0
  O  O19  1  0.785  0.215  0.000  1.0
  O  O20  1  0.430  0.215  0.001  1.0
  O  O21  1  0.415  0.203  0.335  1.0
  O  O22  1  0.382  0.187  0.664  1.0
  O  O23  1  0.499  0.003  0.831  1.0
  O  O24  1  0.501  0.997  0.169  1.0
  O  O25  1  0.500  0.000  0.500  1.0
  O  O26  1  0.570  0.785  0.999  1.0
  O  O27  1  0.618  0.813  0.336  1.0
  O  O28  1  0.585  0.797  0.665  1.0
  O  O29  1  0.499  0.499  0.830  1.0
  O  O30  1  0.501  0.501  0.170  1.0
  O  O31  1  0.500  0.500  0.500  1.0
  O  O32  1  0.215  0.785  0.000  1.0
  O  O33  1  0.219  0.783  0.334  1.0
  O  O34  1  0.217  0.781  0.666  1.0
  O  O35  1  0.203  0.415  0.335  1.0
  O  O36  1  0.215  0.430  0.001  1.0
  O  O37  1  0.187  0.382  0.664  1.0
[/CIF]
.