The material structure described by Ge7N2O15 crystallizes in the monoclinic C2/c space group. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Ge(4)N2O4 octahedra,  a cornercorner with one Ge(2)O4 tetrahedra, and corners with two equivalent Ge(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. In the second Ge site, Ge(2) is bonded to one O(1), one O(3), one O(6), and one O(8) atom to form corner-sharing GeO4 tetrahedra. In the third Ge site, Ge(3) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form GeO4 tetrahedra that share  a cornercorner with one Ge(4)N2O4 octahedra,  a cornercorner with one Ge(2)O4 tetrahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the fourth Ge site, Ge(4) is bonded to two equivalent N(1), two equivalent O(5), and two equivalent O(7) atoms to form corner-sharing GeN2O4 octahedra. N(1) is bonded in a bent 120 degrees geometry to one Ge(4) and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ge(2) and one Ge(3) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Ge(1) and one Ge(3) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to two equivalent Ge(2) atoms. 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(3) and one Ge(4) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Ge(1) and one Ge(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Ge(2) and one N(1) atom. is represented by the CIF file [CIF]
data_Ge7N2O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.910
_cell_length_b   7.910
_cell_length_c   15.110
_cell_angle_alpha   86.807
_cell_angle_beta   86.807
_cell_angle_gamma   57.098
_symmetry_Int_Tables_number   1
_cell_volume   792.126
_cell_formula_units_Z   2
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  0.281  0.236  0.161  1.0
  Ge  Ge1  1  0.764  0.719  0.339  1.0
  Ge  Ge2  1  0.719  0.764  0.839  1.0
  Ge  Ge3  1  0.236  0.281  0.661  1.0
  Ge  Ge4  1  0.659  0.357  0.347  1.0
  Ge  Ge5  1  0.643  0.341  0.153  1.0
  Ge  Ge6  1  0.341  0.643  0.653  1.0
  Ge  Ge7  1  0.357  0.659  0.847  1.0
  Ge  Ge8  1  0.233  0.375  0.365  1.0
  Ge  Ge9  1  0.625  0.767  0.135  1.0
  Ge  Ge10  1  0.767  0.625  0.635  1.0
  Ge  Ge11  1  0.375  0.233  0.865  1.0
  Ge  Ge12  1  0.000  0.500  0.000  1.0
  Ge  Ge13  1  0.500  0.000  0.500  1.0
  N  N14  1  0.326  0.846  0.493  1.0
  N  N15  1  0.154  0.674  0.007  1.0
  N  N16  1  0.674  0.154  0.507  1.0
  N  N17  1  0.846  0.326  0.993  1.0
  O  O18  1  0.403  0.456  0.345  1.0
  O  O19  1  0.544  0.597  0.155  1.0
  O  O20  1  0.597  0.544  0.655  1.0
  O  O21  1  0.456  0.403  0.845  1.0
  O  O22  1  0.229  0.241  0.277  1.0
  O  O23  1  0.759  0.771  0.223  1.0
  O  O24  1  0.771  0.759  0.723  1.0
  O  O25  1  0.241  0.229  0.777  1.0
  O  O26  1  0.782  0.218  0.250  1.0
  O  O27  1  0.218  0.782  0.750  1.0
  O  O28  1  0.384  0.989  0.127  1.0
  O  O29  1  0.011  0.616  0.373  1.0
  O  O30  1  0.616  0.011  0.873  1.0
  O  O31  1  0.989  0.384  0.627  1.0
  O  O32  1  0.275  0.245  0.467  1.0
  O  O33  1  0.755  0.725  0.033  1.0
  O  O34  1  0.725  0.755  0.533  1.0
  O  O35  1  0.245  0.275  0.967  1.0
  O  O36  1  0.452  0.310  0.129  1.0
  O  O37  1  0.690  0.548  0.371  1.0
  O  O38  1  0.548  0.690  0.871  1.0
  O  O39  1  0.310  0.452  0.629  1.0
  O  O40  1  0.046  0.408  0.116  1.0
  O  O41  1  0.592  0.954  0.384  1.0
  O  O42  1  0.954  0.592  0.884  1.0
  O  O43  1  0.408  0.046  0.616  1.0
  O  O44  1  0.782  0.164  0.443  1.0
  O  O45  1  0.836  0.218  0.057  1.0
  O  O46  1  0.218  0.836  0.557  1.0
  O  O47  1  0.164  0.782  0.943  1.0
[/CIF]
.
The material structure described by Ge7N2O15 crystallizes in the monoclinic C2/c space group. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Ge(4)N2O4 octahedra,  a cornercorner with one Ge(2)O4 tetrahedra, and corners with two equivalent Ge(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. In the second Ge site, Ge(2) is bonded to one O(1), one O(3), one O(6), and one O(8) atom to form corner-sharing GeO4 tetrahedra. In the third Ge site, Ge(3) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form GeO4 tetrahedra that share  a cornercorner with one Ge(4)N2O4 octahedra,  a cornercorner with one Ge(2)O4 tetrahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the fourth Ge site, Ge(4) is bonded to two equivalent N(1), two equivalent O(5), and two equivalent O(7) atoms to form corner-sharing GeN2O4 octahedra. N(1) is bonded in a bent 120 degrees geometry to one Ge(4) and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ge(2) and one Ge(3) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Ge(1) and one Ge(3) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to two equivalent Ge(2) atoms. 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(3) and one Ge(4) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Ge(1) and one Ge(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Ge(2) and one N(1) atom. is represented by the CIF file [CIF]
data_Ge7N2O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.910
_cell_length_b   7.910
_cell_length_c   15.110
_cell_angle_alpha   86.807
_cell_angle_beta   86.807
_cell_angle_gamma   57.098
_symmetry_Int_Tables_number   1
_cell_volume   792.126
_cell_formula_units_Z   2
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  0.281  0.236  0.161  1.0
  Ge  Ge1  1  0.764  0.719  0.339  1.0
  Ge  Ge2  1  0.719  0.764  0.839  1.0
  Ge  Ge3  1  0.236  0.281  0.661  1.0
  Ge  Ge4  1  0.659  0.357  0.347  1.0
  Ge  Ge5  1  0.643  0.341  0.153  1.0
  Ge  Ge6  1  0.341  0.643  0.653  1.0
  Ge  Ge7  1  0.357  0.659  0.847  1.0
  Ge  Ge8  1  0.233  0.375  0.365  1.0
  Ge  Ge9  1  0.625  0.767  0.135  1.0
  Ge  Ge10  1  0.767  0.625  0.635  1.0
  Ge  Ge11  1  0.375  0.233  0.865  1.0
  Ge  Ge12  1  0.000  0.500  0.000  1.0
  Ge  Ge13  1  0.500  0.000  0.500  1.0
  N  N14  1  0.326  0.846  0.493  1.0
  N  N15  1  0.154  0.674  0.007  1.0
  N  N16  1  0.674  0.154  0.507  1.0
  N  N17  1  0.846  0.326  0.993  1.0
  O  O18  1  0.403  0.456  0.345  1.0
  O  O19  1  0.544  0.597  0.155  1.0
  O  O20  1  0.597  0.544  0.655  1.0
  O  O21  1  0.456  0.403  0.845  1.0
  O  O22  1  0.229  0.241  0.277  1.0
  O  O23  1  0.759  0.771  0.223  1.0
  O  O24  1  0.771  0.759  0.723  1.0
  O  O25  1  0.241  0.229  0.777  1.0
  O  O26  1  0.782  0.218  0.250  1.0
  O  O27  1  0.218  0.782  0.750  1.0
  O  O28  1  0.384  0.989  0.127  1.0
  O  O29  1  0.011  0.616  0.373  1.0
  O  O30  1  0.616  0.011  0.873  1.0
  O  O31  1  0.989  0.384  0.627  1.0
  O  O32  1  0.275  0.245  0.467  1.0
  O  O33  1  0.755  0.725  0.033  1.0
  O  O34  1  0.725  0.755  0.533  1.0
  O  O35  1  0.245  0.275  0.967  1.0
  O  O36  1  0.452  0.310  0.129  1.0
  O  O37  1  0.690  0.548  0.371  1.0
  O  O38  1  0.548  0.690  0.871  1.0
  O  O39  1  0.310  0.452  0.629  1.0
  O  O40  1  0.046  0.408  0.116  1.0
  O  O41  1  0.592  0.954  0.384  1.0
  O  O42  1  0.954  0.592  0.884  1.0
  O  O43  1  0.408  0.046  0.616  1.0
  O  O44  1  0.782  0.164  0.443  1.0
  O  O45  1  0.836  0.218  0.057  1.0
  O  O46  1  0.218  0.836  0.557  1.0
  O  O47  1  0.164  0.782  0.943  1.0
[/CIF]
.