The structure described by SrPb2Ge12O27 crystallizes in the monoclinic C2 space group. Sr(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(11), two equivalent O(13), two equivalent O(4), and two equivalent O(7) atoms. Pb(1) is bonded in a distorted rectangular see-saw-like geometry to one O(12), one O(14), one O(8), and one O(9) atom. There are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(3), one O(7), and one O(9) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(3)O6 octahedra,  a cornercorner with one Ge(4)O4 tetrahedra, and  a cornercorner with one Ge(6)O4 tetrahedra. The corner-sharing octahedral tilt angles are 62°. In the second Ge site, Ge(2) is bonded to two equivalent O(2) and two equivalent O(8) atoms to form GeO4 tetrahedra that share corners with two equivalent Ge(3)O6 octahedra and corners with two equivalent Ge(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 62°. In the third Ge site, Ge(3) is bonded to two equivalent O(7), two equivalent O(8), and two equivalent O(9) atoms to form corner-sharing GeO6 octahedra. In the fourth Ge site, Ge(4) is bonded to one O(1), one O(10), one O(12), and one O(4) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(7)O6 octahedra,  a cornercorner with one Ge(1)O4 tetrahedra, and  a cornercorner with one Ge(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-61°. In the fifth Ge site, Ge(5) is bonded to one O(11), one O(13), one O(2), and one O(5) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(7)O6 octahedra,  a cornercorner with one Ge(2)O4 tetrahedra, and  a cornercorner with one Ge(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 58-61°. In the sixth Ge site, Ge(6) is bonded to one O(10), one O(14), one O(3), and one O(6) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(7)O6 octahedra,  a cornercorner with one Ge(1)O4 tetrahedra, and  a cornercorner with one Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-61°. In the seventh Ge site, Ge(7) is bonded to one O(12), one O(13), one O(14), one O(4), one O(5), and one O(6) atom to form corner-sharing GeO6 octahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one Ge(1), and one Ge(4) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ge(2) and one Ge(5) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(6) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Sr(1), one Ge(4), and one Ge(7) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ge(5) and one Ge(7) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Ge(6) and one Ge(7) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Sr(1), one Ge(1), and one Ge(3) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Pb(1), one Ge(2), and one Ge(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Pb(1), one Ge(1), and one Ge(3) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Ge(4) and one Ge(6) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to two equivalent Sr(1) and two equivalent Ge(5) atoms. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Pb(1), one Ge(4), and one Ge(7) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Sr(1), one Ge(5), and one Ge(7) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 120 degrees geometry to one Pb(1), one Ge(6), and one Ge(7) atom. is represented by the CIF file [CIF]
data_SrGe12Pb2O27
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.548
_cell_length_b   11.548
_cell_length_c   4.825
_cell_angle_alpha   89.939
_cell_angle_beta   89.939
_cell_angle_gamma   60.020
_symmetry_Int_Tables_number   1
_cell_volume   557.417
_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
  Sr  Sr0  1  0.673  0.327  0.000  1.0
  Ge  Ge1  1  1.000  0.180  0.500  1.0
  Ge  Ge2  1  0.820  0.000  0.500  1.0
  Ge  Ge3  1  0.180  0.820  0.500  1.0
  Ge  Ge4  1  0.999  0.001  0.000  1.0
  Ge  Ge5  1  0.510  0.149  0.599  1.0
  Ge  Ge6  1  0.341  0.510  0.600  1.0
  Ge  Ge7  1  0.149  0.341  0.600  1.0
  Ge  Ge8  1  0.851  0.490  0.401  1.0
  Ge  Ge9  1  0.659  0.851  0.400  1.0
  Ge  Ge10  1  0.490  0.659  0.400  1.0
  Ge  Ge11  1  0.334  0.333  0.108  1.0
  Ge  Ge12  1  0.667  0.666  0.892  1.0
  Pb  Pb13  1  0.000  0.674  0.000  1.0
  Pb  Pb14  1  0.326  1.000  1.000  1.0
  O  O15  1  0.675  0.111  0.706  1.0
  O  O16  1  0.215  0.675  0.706  1.0
  O  O17  1  0.109  0.215  0.706  1.0
  O  O18  1  0.889  0.325  0.294  1.0
  O  O19  1  0.785  0.891  0.294  1.0
  O  O20  1  0.325  0.785  0.294  1.0
  O  O21  1  0.490  0.261  0.328  1.0
  O  O22  1  0.250  0.489  0.329  1.0
  O  O23  1  0.261  0.250  0.329  1.0
  O  O24  1  0.739  0.510  0.672  1.0
  O  O25  1  0.750  0.739  0.671  1.0
  O  O26  1  0.511  0.750  0.671  1.0
  O  O27  1  0.845  0.094  0.237  1.0
  O  O28  1  0.061  0.846  0.237  1.0
  O  O29  1  0.093  0.061  0.237  1.0
  O  O30  1  0.906  0.155  0.763  1.0
  O  O31  1  0.939  0.907  0.763  1.0
  O  O32  1  0.154  0.939  0.763  1.0
  O  O33  1  1.000  0.487  0.500  1.0
  O  O34  1  0.513  0.000  0.500  1.0
  O  O35  1  0.488  0.512  0.500  1.0
  O  O36  1  0.399  0.180  0.879  1.0
  O  O37  1  0.422  0.399  0.879  1.0
  O  O38  1  0.180  0.421  0.879  1.0
  O  O39  1  0.820  0.601  0.121  1.0
  O  O40  1  0.579  0.820  0.121  1.0
  O  O41  1  0.601  0.578  0.121  1.0
[/CIF]
.
The structure described by SrPb2Ge12O27 crystallizes in the monoclinic C2 space group. Sr(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(11), two equivalent O(13), two equivalent O(4), and two equivalent O(7) atoms. Pb(1) is bonded in a distorted rectangular see-saw-like geometry to one O(12), one O(14), one O(8), and one O(9) atom. There are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(3), one O(7), and one O(9) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(3)O6 octahedra,  a cornercorner with one Ge(4)O4 tetrahedra, and  a cornercorner with one Ge(6)O4 tetrahedra. The corner-sharing octahedral tilt angles are 62°. In the second Ge site, Ge(2) is bonded to two equivalent O(2) and two equivalent O(8) atoms to form GeO4 tetrahedra that share corners with two equivalent Ge(3)O6 octahedra and corners with two equivalent Ge(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 62°. In the third Ge site, Ge(3) is bonded to two equivalent O(7), two equivalent O(8), and two equivalent O(9) atoms to form corner-sharing GeO6 octahedra. In the fourth Ge site, Ge(4) is bonded to one O(1), one O(10), one O(12), and one O(4) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(7)O6 octahedra,  a cornercorner with one Ge(1)O4 tetrahedra, and  a cornercorner with one Ge(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-61°. In the fifth Ge site, Ge(5) is bonded to one O(11), one O(13), one O(2), and one O(5) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(7)O6 octahedra,  a cornercorner with one Ge(2)O4 tetrahedra, and  a cornercorner with one Ge(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 58-61°. In the sixth Ge site, Ge(6) is bonded to one O(10), one O(14), one O(3), and one O(6) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(7)O6 octahedra,  a cornercorner with one Ge(1)O4 tetrahedra, and  a cornercorner with one Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-61°. In the seventh Ge site, Ge(7) is bonded to one O(12), one O(13), one O(14), one O(4), one O(5), and one O(6) atom to form corner-sharing GeO6 octahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one Ge(1), and one Ge(4) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ge(2) and one Ge(5) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(6) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Sr(1), one Ge(4), and one Ge(7) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ge(5) and one Ge(7) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Ge(6) and one Ge(7) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Sr(1), one Ge(1), and one Ge(3) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Pb(1), one Ge(2), and one Ge(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Pb(1), one Ge(1), and one Ge(3) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Ge(4) and one Ge(6) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to two equivalent Sr(1) and two equivalent Ge(5) atoms. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Pb(1), one Ge(4), and one Ge(7) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Sr(1), one Ge(5), and one Ge(7) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 120 degrees geometry to one Pb(1), one Ge(6), and one Ge(7) atom. is represented by the CIF file [CIF]
data_SrGe12Pb2O27
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.548
_cell_length_b   11.548
_cell_length_c   4.825
_cell_angle_alpha   89.939
_cell_angle_beta   89.939
_cell_angle_gamma   60.020
_symmetry_Int_Tables_number   1
_cell_volume   557.417
_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
  Sr  Sr0  1  0.673  0.327  0.000  1.0
  Ge  Ge1  1  1.000  0.180  0.500  1.0
  Ge  Ge2  1  0.820  0.000  0.500  1.0
  Ge  Ge3  1  0.180  0.820  0.500  1.0
  Ge  Ge4  1  0.999  0.001  0.000  1.0
  Ge  Ge5  1  0.510  0.149  0.599  1.0
  Ge  Ge6  1  0.341  0.510  0.600  1.0
  Ge  Ge7  1  0.149  0.341  0.600  1.0
  Ge  Ge8  1  0.851  0.490  0.401  1.0
  Ge  Ge9  1  0.659  0.851  0.400  1.0
  Ge  Ge10  1  0.490  0.659  0.400  1.0
  Ge  Ge11  1  0.334  0.333  0.108  1.0
  Ge  Ge12  1  0.667  0.666  0.892  1.0
  Pb  Pb13  1  0.000  0.674  0.000  1.0
  Pb  Pb14  1  0.326  1.000  1.000  1.0
  O  O15  1  0.675  0.111  0.706  1.0
  O  O16  1  0.215  0.675  0.706  1.0
  O  O17  1  0.109  0.215  0.706  1.0
  O  O18  1  0.889  0.325  0.294  1.0
  O  O19  1  0.785  0.891  0.294  1.0
  O  O20  1  0.325  0.785  0.294  1.0
  O  O21  1  0.490  0.261  0.328  1.0
  O  O22  1  0.250  0.489  0.329  1.0
  O  O23  1  0.261  0.250  0.329  1.0
  O  O24  1  0.739  0.510  0.672  1.0
  O  O25  1  0.750  0.739  0.671  1.0
  O  O26  1  0.511  0.750  0.671  1.0
  O  O27  1  0.845  0.094  0.237  1.0
  O  O28  1  0.061  0.846  0.237  1.0
  O  O29  1  0.093  0.061  0.237  1.0
  O  O30  1  0.906  0.155  0.763  1.0
  O  O31  1  0.939  0.907  0.763  1.0
  O  O32  1  0.154  0.939  0.763  1.0
  O  O33  1  1.000  0.487  0.500  1.0
  O  O34  1  0.513  0.000  0.500  1.0
  O  O35  1  0.488  0.512  0.500  1.0
  O  O36  1  0.399  0.180  0.879  1.0
  O  O37  1  0.422  0.399  0.879  1.0
  O  O38  1  0.180  0.421  0.879  1.0
  O  O39  1  0.820  0.601  0.121  1.0
  O  O40  1  0.579  0.820  0.121  1.0
  O  O41  1  0.601  0.578  0.121  1.0
[/CIF]
.