The compound described by Ge2As2O7 crystallizes in the triclinic P-1 space group. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(5), and one O(6) atom. In the second Ge site, Ge(2) is bonded to one O(3), one O(4), one O(7), and one O(8) atom to form corner-sharing GeO4 tetrahedra. In the third Ge site, Ge(3) is bonded to one O(10), one O(12), one O(14), and one O(9) atom to form corner-sharing GeO4 tetrahedra. In the fourth Ge site, Ge(4) is bonded to one O(11), one O(13), one O(14), and one O(8) atom to form corner-sharing GeO4 tetrahedra. There are four inequivalent As sites. In the first As site, As(1) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(3) atom. In the second As site, As(2) is bonded in a distorted T-shaped geometry to one O(10), one O(4), and one O(6) atom. In the third As site, As(3) is bonded in a distorted T-shaped geometry to one O(11), one O(12), and one O(5) atom. In the fourth As site, As(4) is bonded in a distorted T-shaped geometry to one O(13), one O(7), and one O(9) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ge(1) and one As(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ge(1) and one As(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ge(2) and one As(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ge(2) and one As(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Ge(1) and one As(3) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Ge(1) and one As(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Ge(2) and one As(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Ge(2) and one Ge(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Ge(3) and one As(4) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Ge(3) and one As(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Ge(4) and one As(3) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Ge(3) and one As(3) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Ge(4) and one As(4) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Ge(3) and one Ge(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ge2As2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.214
_cell_length_b   7.283
_cell_length_c   13.073
_cell_angle_alpha   90.704
_cell_angle_beta   96.098
_cell_angle_gamma   94.129
_symmetry_Int_Tables_number   1
_cell_volume   681.024
_cell_formula_units_Z   4
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  0.932  0.916  0.121  1.0
  Ge  Ge1  1  0.312  0.509  0.191  1.0
  Ge  Ge2  1  0.662  0.129  0.381  1.0
  Ge  Ge3  1  0.263  0.654  0.406  1.0
  Ge  Ge4  1  0.737  0.346  0.594  1.0
  Ge  Ge5  1  0.338  0.871  0.619  1.0
  Ge  Ge6  1  0.688  0.491  0.809  1.0
  Ge  Ge7  1  0.068  0.084  0.879  1.0
  As  As8  1  0.840  0.313  0.027  1.0
  As  As9  1  0.398  0.075  0.162  1.0
  As  As10  1  0.836  0.734  0.345  1.0
  As  As11  1  0.075  0.264  0.336  1.0
  As  As12  1  0.925  0.736  0.664  1.0
  As  As13  1  0.164  0.266  0.655  1.0
  As  As14  1  0.602  0.925  0.838  1.0
  As  As15  1  0.160  0.687  0.973  1.0
  O  O16  1  0.054  0.269  0.969  1.0
  O  O17  1  0.779  0.073  0.056  1.0
  O  O18  1  0.305  0.685  0.098  1.0
  O  O19  1  0.425  0.325  0.141  1.0
  O  O20  1  0.795  0.838  0.217  1.0
  O  O21  1  0.144  0.040  0.171  1.0
  O  O22  1  0.088  0.429  0.227  1.0
  O  O23  1  0.418  0.622  0.308  1.0
  O  O24  1  0.822  0.286  0.325  1.0
  O  O25  1  0.447  0.090  0.302  1.0
  O  O26  1  0.086  0.804  0.367  1.0
  O  O27  1  0.771  0.928  0.419  1.0
  O  O28  1  0.156  0.437  0.438  1.0
  O  O29  1  0.590  0.242  0.490  1.0
  O  O30  1  0.410  0.758  0.510  1.0
  O  O31  1  0.844  0.563  0.562  1.0
  O  O32  1  0.229  0.072  0.581  1.0
  O  O33  1  0.914  0.196  0.633  1.0
  O  O34  1  0.553  0.910  0.698  1.0
  O  O35  1  0.178  0.714  0.675  1.0
  O  O36  1  0.582  0.378  0.692  1.0
  O  O37  1  0.912  0.571  0.773  1.0
  O  O38  1  0.856  0.960  0.829  1.0
  O  O39  1  0.205  0.162  0.783  1.0
  O  O40  1  0.575  0.675  0.859  1.0
  O  O41  1  0.695  0.315  0.902  1.0
  O  O42  1  0.221  0.927  0.944  1.0
  O  O43  1  0.946  0.731  0.031  1.0
[/CIF]
.
The compound described by Ge2As2O7 crystallizes in the triclinic P-1 space group. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(5), and one O(6) atom. In the second Ge site, Ge(2) is bonded to one O(3), one O(4), one O(7), and one O(8) atom to form corner-sharing GeO4 tetrahedra. In the third Ge site, Ge(3) is bonded to one O(10), one O(12), one O(14), and one O(9) atom to form corner-sharing GeO4 tetrahedra. In the fourth Ge site, Ge(4) is bonded to one O(11), one O(13), one O(14), and one O(8) atom to form corner-sharing GeO4 tetrahedra. There are four inequivalent As sites. In the first As site, As(1) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(3) atom. In the second As site, As(2) is bonded in a distorted T-shaped geometry to one O(10), one O(4), and one O(6) atom. In the third As site, As(3) is bonded in a distorted T-shaped geometry to one O(11), one O(12), and one O(5) atom. In the fourth As site, As(4) is bonded in a distorted T-shaped geometry to one O(13), one O(7), and one O(9) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ge(1) and one As(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ge(1) and one As(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ge(2) and one As(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ge(2) and one As(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Ge(1) and one As(3) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Ge(1) and one As(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Ge(2) and one As(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Ge(2) and one Ge(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Ge(3) and one As(4) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Ge(3) and one As(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Ge(4) and one As(3) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Ge(3) and one As(3) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Ge(4) and one As(4) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Ge(3) and one Ge(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ge2As2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.214
_cell_length_b   7.283
_cell_length_c   13.073
_cell_angle_alpha   90.704
_cell_angle_beta   96.098
_cell_angle_gamma   94.129
_symmetry_Int_Tables_number   1
_cell_volume   681.024
_cell_formula_units_Z   4
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  0.932  0.916  0.121  1.0
  Ge  Ge1  1  0.312  0.509  0.191  1.0
  Ge  Ge2  1  0.662  0.129  0.381  1.0
  Ge  Ge3  1  0.263  0.654  0.406  1.0
  Ge  Ge4  1  0.737  0.346  0.594  1.0
  Ge  Ge5  1  0.338  0.871  0.619  1.0
  Ge  Ge6  1  0.688  0.491  0.809  1.0
  Ge  Ge7  1  0.068  0.084  0.879  1.0
  As  As8  1  0.840  0.313  0.027  1.0
  As  As9  1  0.398  0.075  0.162  1.0
  As  As10  1  0.836  0.734  0.345  1.0
  As  As11  1  0.075  0.264  0.336  1.0
  As  As12  1  0.925  0.736  0.664  1.0
  As  As13  1  0.164  0.266  0.655  1.0
  As  As14  1  0.602  0.925  0.838  1.0
  As  As15  1  0.160  0.687  0.973  1.0
  O  O16  1  0.054  0.269  0.969  1.0
  O  O17  1  0.779  0.073  0.056  1.0
  O  O18  1  0.305  0.685  0.098  1.0
  O  O19  1  0.425  0.325  0.141  1.0
  O  O20  1  0.795  0.838  0.217  1.0
  O  O21  1  0.144  0.040  0.171  1.0
  O  O22  1  0.088  0.429  0.227  1.0
  O  O23  1  0.418  0.622  0.308  1.0
  O  O24  1  0.822  0.286  0.325  1.0
  O  O25  1  0.447  0.090  0.302  1.0
  O  O26  1  0.086  0.804  0.367  1.0
  O  O27  1  0.771  0.928  0.419  1.0
  O  O28  1  0.156  0.437  0.438  1.0
  O  O29  1  0.590  0.242  0.490  1.0
  O  O30  1  0.410  0.758  0.510  1.0
  O  O31  1  0.844  0.563  0.562  1.0
  O  O32  1  0.229  0.072  0.581  1.0
  O  O33  1  0.914  0.196  0.633  1.0
  O  O34  1  0.553  0.910  0.698  1.0
  O  O35  1  0.178  0.714  0.675  1.0
  O  O36  1  0.582  0.378  0.692  1.0
  O  O37  1  0.912  0.571  0.773  1.0
  O  O38  1  0.856  0.960  0.829  1.0
  O  O39  1  0.205  0.162  0.783  1.0
  O  O40  1  0.575  0.675  0.859  1.0
  O  O41  1  0.695  0.315  0.902  1.0
  O  O42  1  0.221  0.927  0.944  1.0
  O  O43  1  0.946  0.731  0.031  1.0
[/CIF]
.