The structure described by La2Ge2O7 crystallizes in the triclinic P-1 space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(3), one O(7), one O(9), and two equivalent O(4) atoms. In the second La site, La(2) is bonded in a 6-coordinate geometry to one O(12), one O(13), one O(14), one O(3), one O(6), and one O(7) atom. In the third La site, La(3) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(13), one O(14), one O(5), one O(7), and two equivalent O(6) atoms. In the fourth La site, La(4) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(4), one O(5), one O(9), and two equivalent O(2) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form corner-sharing GeO4 tetrahedra. In the second Ge site, Ge(2) is bonded to one O(12), one O(13), one O(14), 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(11), one O(12), and one O(9) atom to form corner-sharing GeO4 tetrahedra. In the fourth Ge site, Ge(4) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one La(1), one La(3), one La(4), and one Ge(4) atom. In the second O site, O(2) is bonded to one La(1), two equivalent La(4), and one Ge(4) atom to form distorted edge-sharing OLa3Ge tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one La(1), one La(2), and one Ge(4) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one La(4), two equivalent La(1), and one Ge(4) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one La(3), one La(4), and one Ge(1) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one La(2), two equivalent La(3), and one Ge(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one La(1), one La(2), one La(3), and one Ge(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one La(1), one La(4), and one Ge(3) atom. In the tenth O site, O(10) is bonded in a 1-coordinate geometry to one La(1), one La(3), and one Ge(3) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one La(1), one La(4), and one Ge(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one La(2), one Ge(2), and one Ge(3) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one La(2), one La(3), and one Ge(2) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one La(2), one La(3), and one Ge(2) atom. is represented by the CIF file [CIF]
data_La2Ge2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.033
_cell_length_b   7.076
_cell_length_c   12.791
_cell_angle_alpha   93.975
_cell_angle_beta   90.145
_cell_angle_gamma   90.943
_symmetry_Int_Tables_number   1
_cell_volume   634.931
_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
  La  La0  1  0.334  0.828  0.107  1.0
  La  La1  1  0.666  0.172  0.893  1.0
  La  La2  1  0.633  0.762  0.371  1.0
  La  La3  1  0.367  0.238  0.629  1.0
  La  La4  1  0.119  0.086  0.361  1.0
  La  La5  1  0.881  0.914  0.639  1.0
  La  La6  1  0.050  0.332  0.117  1.0
  La  La7  1  0.950  0.668  0.883  1.0
  Ge  Ge8  1  0.852  0.379  0.615  1.0
  Ge  Ge9  1  0.148  0.621  0.385  1.0
  Ge  Ge10  1  0.625  0.266  0.402  1.0
  Ge  Ge11  1  0.375  0.734  0.598  1.0
  Ge  Ge12  1  0.511  0.327  0.172  1.0
  Ge  Ge13  1  0.489  0.673  0.828  1.0
  Ge  Ge14  1  0.844  0.852  0.117  1.0
  Ge  Ge15  1  0.156  0.148  0.883  1.0
  O  O16  1  0.004  0.012  0.184  1.0
  O  O17  1  0.996  0.988  0.816  1.0
  O  O18  1  0.006  0.667  0.080  1.0
  O  O19  1  0.994  0.333  0.920  1.0
  O  O20  1  0.652  0.785  0.192  1.0
  O  O21  1  0.348  0.215  0.808  1.0
  O  O22  1  0.752  0.902  0.995  1.0
  O  O23  1  0.248  0.098  0.005  1.0
  O  O24  1  0.927  0.586  0.684  1.0
  O  O25  1  0.073  0.414  0.316  1.0
  O  O26  1  0.035  0.229  0.567  1.0
  O  O27  1  0.965  0.771  0.433  1.0
  O  O28  1  0.708  0.222  0.684  1.0
  O  O29  1  0.292  0.778  0.316  1.0
  O  O30  1  0.701  0.434  0.506  1.0
  O  O31  1  0.299  0.566  0.494  1.0
  O  O32  1  0.646  0.509  0.874  1.0
  O  O33  1  0.354  0.491  0.126  1.0
  O  O34  1  0.627  0.864  0.788  1.0
  O  O35  1  0.373  0.136  0.212  1.0
  O  O36  1  0.298  0.719  0.911  1.0
  O  O37  1  0.702  0.281  0.089  1.0
  O  O38  1  0.395  0.578  0.700  1.0
  O  O39  1  0.605  0.422  0.300  1.0
  O  O40  1  0.585  0.836  0.555  1.0
  O  O41  1  0.415  0.164  0.445  1.0
  O  O42  1  0.222  0.919  0.621  1.0
  O  O43  1  0.778  0.081  0.379  1.0
[/CIF]
.
The structure described by La2Ge2O7 crystallizes in the triclinic P-1 space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(3), one O(7), one O(9), and two equivalent O(4) atoms. In the second La site, La(2) is bonded in a 6-coordinate geometry to one O(12), one O(13), one O(14), one O(3), one O(6), and one O(7) atom. In the third La site, La(3) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(13), one O(14), one O(5), one O(7), and two equivalent O(6) atoms. In the fourth La site, La(4) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(4), one O(5), one O(9), and two equivalent O(2) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form corner-sharing GeO4 tetrahedra. In the second Ge site, Ge(2) is bonded to one O(12), one O(13), one O(14), 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(11), one O(12), and one O(9) atom to form corner-sharing GeO4 tetrahedra. In the fourth Ge site, Ge(4) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one La(1), one La(3), one La(4), and one Ge(4) atom. In the second O site, O(2) is bonded to one La(1), two equivalent La(4), and one Ge(4) atom to form distorted edge-sharing OLa3Ge tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one La(1), one La(2), and one Ge(4) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one La(4), two equivalent La(1), and one Ge(4) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one La(3), one La(4), and one Ge(1) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one La(2), two equivalent La(3), and one Ge(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one La(1), one La(2), one La(3), and one Ge(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one La(1), one La(4), and one Ge(3) atom. In the tenth O site, O(10) is bonded in a 1-coordinate geometry to one La(1), one La(3), and one Ge(3) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one La(1), one La(4), and one Ge(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one La(2), one Ge(2), and one Ge(3) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one La(2), one La(3), and one Ge(2) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one La(2), one La(3), and one Ge(2) atom. is represented by the CIF file [CIF]
data_La2Ge2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.033
_cell_length_b   7.076
_cell_length_c   12.791
_cell_angle_alpha   93.975
_cell_angle_beta   90.145
_cell_angle_gamma   90.943
_symmetry_Int_Tables_number   1
_cell_volume   634.931
_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
  La  La0  1  0.334  0.828  0.107  1.0
  La  La1  1  0.666  0.172  0.893  1.0
  La  La2  1  0.633  0.762  0.371  1.0
  La  La3  1  0.367  0.238  0.629  1.0
  La  La4  1  0.119  0.086  0.361  1.0
  La  La5  1  0.881  0.914  0.639  1.0
  La  La6  1  0.050  0.332  0.117  1.0
  La  La7  1  0.950  0.668  0.883  1.0
  Ge  Ge8  1  0.852  0.379  0.615  1.0
  Ge  Ge9  1  0.148  0.621  0.385  1.0
  Ge  Ge10  1  0.625  0.266  0.402  1.0
  Ge  Ge11  1  0.375  0.734  0.598  1.0
  Ge  Ge12  1  0.511  0.327  0.172  1.0
  Ge  Ge13  1  0.489  0.673  0.828  1.0
  Ge  Ge14  1  0.844  0.852  0.117  1.0
  Ge  Ge15  1  0.156  0.148  0.883  1.0
  O  O16  1  0.004  0.012  0.184  1.0
  O  O17  1  0.996  0.988  0.816  1.0
  O  O18  1  0.006  0.667  0.080  1.0
  O  O19  1  0.994  0.333  0.920  1.0
  O  O20  1  0.652  0.785  0.192  1.0
  O  O21  1  0.348  0.215  0.808  1.0
  O  O22  1  0.752  0.902  0.995  1.0
  O  O23  1  0.248  0.098  0.005  1.0
  O  O24  1  0.927  0.586  0.684  1.0
  O  O25  1  0.073  0.414  0.316  1.0
  O  O26  1  0.035  0.229  0.567  1.0
  O  O27  1  0.965  0.771  0.433  1.0
  O  O28  1  0.708  0.222  0.684  1.0
  O  O29  1  0.292  0.778  0.316  1.0
  O  O30  1  0.701  0.434  0.506  1.0
  O  O31  1  0.299  0.566  0.494  1.0
  O  O32  1  0.646  0.509  0.874  1.0
  O  O33  1  0.354  0.491  0.126  1.0
  O  O34  1  0.627  0.864  0.788  1.0
  O  O35  1  0.373  0.136  0.212  1.0
  O  O36  1  0.298  0.719  0.911  1.0
  O  O37  1  0.702  0.281  0.089  1.0
  O  O38  1  0.395  0.578  0.700  1.0
  O  O39  1  0.605  0.422  0.300  1.0
  O  O40  1  0.585  0.836  0.555  1.0
  O  O41  1  0.415  0.164  0.445  1.0
  O  O42  1  0.222  0.919  0.621  1.0
  O  O43  1  0.778  0.081  0.379  1.0
[/CIF]
.