The material structure described by K2Pb2Ge2O7 crystallizes in the trigonal P-3 space group. K(1) is bonded in a 9-coordinate geometry to nine equivalent O(1) atoms. Pb(1) is bonded in a distorted T-shaped geometry to three equivalent O(1) atoms. Ge(1) is bonded to one O(2) and three equivalent O(1) atoms to form corner-sharing GeO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent K(1), one Pb(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a linear geometry to two equivalent Ge(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Ge2Pb2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.886
_cell_length_b   5.886
_cell_length_c   8.109
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   243.254
_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
  K  K0  1  0.667  0.333  0.920  1.0
  K  K1  1  0.333  0.667  0.080  1.0
  Ge  Ge2  1  0.000  0.000  0.277  1.0
  Ge  Ge3  1  0.000  0.000  0.723  1.0
  Pb  Pb4  1  0.333  0.667  0.618  1.0
  Pb  Pb5  1  0.667  0.333  0.382  1.0
  O  O6  1  0.820  0.148  0.209  1.0
  O  O7  1  0.180  0.852  0.791  1.0
  O  O8  1  0.328  0.180  0.209  1.0
  O  O9  1  0.000  0.000  0.500  1.0
  O  O10  1  0.148  0.328  0.791  1.0
  O  O11  1  0.852  0.672  0.209  1.0
  O  O12  1  0.672  0.820  0.791  1.0
[/CIF]
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The material structure described by K2Pb2Ge2O7 crystallizes in the trigonal P-3 space group. K(1) is bonded in a 9-coordinate geometry to nine equivalent O(1) atoms. Pb(1) is bonded in a distorted T-shaped geometry to three equivalent O(1) atoms. Ge(1) is bonded to one O(2) and three equivalent O(1) atoms to form corner-sharing GeO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent K(1), one Pb(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a linear geometry to two equivalent Ge(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Ge2Pb2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.886
_cell_length_b   5.886
_cell_length_c   8.109
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   243.254
_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
  K  K0  1  0.667  0.333  0.920  1.0
  K  K1  1  0.333  0.667  0.080  1.0
  Ge  Ge2  1  0.000  0.000  0.277  1.0
  Ge  Ge3  1  0.000  0.000  0.723  1.0
  Pb  Pb4  1  0.333  0.667  0.618  1.0
  Pb  Pb5  1  0.667  0.333  0.382  1.0
  O  O6  1  0.820  0.148  0.209  1.0
  O  O7  1  0.180  0.852  0.791  1.0
  O  O8  1  0.328  0.180  0.209  1.0
  O  O9  1  0.000  0.000  0.500  1.0
  O  O10  1  0.148  0.328  0.791  1.0
  O  O11  1  0.852  0.672  0.209  1.0
  O  O12  1  0.672  0.820  0.791  1.0
[/CIF]
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