The crystal structure described by BaGa2Ge2O8 crystallizes in the monoclinic C2/c space group. Ba(1) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and two equivalent O(1) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(1), one O(4), one O(6), and one O(8) atom to form GaO4 tetrahedra that share  a cornercorner with one Ge(1)O4 tetrahedra and corners with three equivalent Ge(2)O4 tetrahedra. In the second Ga site, Ga(2) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form GaO4 tetrahedra that share  a cornercorner with one Ge(2)O4 tetrahedra and corners with three equivalent Ge(1)O4 tetrahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Ga(1)O4 tetrahedra and corners with three equivalent Ga(2)O4 tetrahedra. In the second Ge site, Ge(2) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form GeO4 tetrahedra that share  a cornercorner with one Ga(2)O4 tetrahedra and corners with three equivalent Ga(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a 3-coordinate geometry to one Ba(1), one Ga(2), and one Ge(1) atom. In the second O site, O(8) is bonded in a 3-coordinate geometry to one Ba(1), one Ga(1), and one Ge(2) atom. In the third O site, O(1) is bonded to two equivalent Ba(1), one Ga(1), and one Ge(1) atom to form distorted edge-sharing OBa2GaGe tetrahedra. In the fourth O site, O(2) is bonded in a trigonal planar geometry to one Ba(1), one Ga(2), and one Ge(2) atom. In the fifth O site, O(6) is bonded in a bent 120 degrees geometry to one Ba(1), one Ga(1), and one Ge(2) atom. In the sixth O site, O(3) is bonded in a 3-coordinate geometry to one Ba(1), one Ga(2), and one Ge(1) atom. In the seventh O site, O(4) is bonded in a 3-coordinate geometry to one Ba(1), one Ga(1), and one Ge(2) atom. In the eighth O site, O(5) is bonded in a bent 120 degrees geometry to one Ba(1), one Ga(2), and one Ge(1) atom. is represented by the CIF card [CIF]
data_BaGa2(GeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.943
_cell_length_b   9.683
_cell_length_c   9.683
_cell_angle_alpha   88.853
_cell_angle_beta   82.105
_cell_angle_gamma   82.105
_symmetry_Int_Tables_number   1
_cell_volume   822.745
_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
  Ba  Ba0  1  0.791  0.934  0.933  1.0
  Ba  Ba1  1  0.709  0.567  0.566  1.0
  Ba  Ba2  1  0.209  0.066  0.067  1.0
  Ba  Ba3  1  0.291  0.433  0.434  1.0
  Ga  Ga4  1  0.615  0.566  0.202  1.0
  Ga  Ga5  1  0.885  0.298  0.934  1.0
  Ga  Ga6  1  0.385  0.434  0.798  1.0
  Ga  Ga7  1  0.115  0.702  0.066  1.0
  Ga  Ga8  1  0.473  0.949  0.704  1.0
  Ga  Ga9  1  0.027  0.796  0.551  1.0
  Ga  Ga10  1  0.527  0.051  0.296  1.0
  Ga  Ga11  1  0.973  0.204  0.449  1.0
  Ge  Ge12  1  0.103  0.072  0.712  1.0
  Ge  Ge13  1  0.397  0.788  0.428  1.0
  Ge  Ge14  1  0.897  0.928  0.288  1.0
  Ge  Ge15  1  0.603  0.212  0.572  1.0
  Ge  Ge16  1  0.982  0.442  0.212  1.0
  Ge  Ge17  1  0.518  0.288  0.058  1.0
  Ge  Ge18  1  0.018  0.558  0.788  1.0
  Ge  Ge19  1  0.482  0.712  0.942  1.0
  O  O20  1  0.997  0.131  0.872  1.0
  O  O21  1  0.503  0.628  0.369  1.0
  O  O22  1  0.003  0.869  0.128  1.0
  O  O23  1  0.497  0.372  0.631  1.0
  O  O24  1  0.547  0.856  0.853  1.0
  O  O25  1  0.953  0.647  0.644  1.0
  O  O26  1  0.453  0.144  0.147  1.0
  O  O27  1  0.047  0.353  0.356  1.0
  O  O28  1  0.279  0.023  0.770  1.0
  O  O29  1  0.221  0.730  0.477  1.0
  O  O30  1  0.721  0.977  0.230  1.0
  O  O31  1  0.779  0.270  0.523  1.0
  O  O32  1  0.798  0.525  0.268  1.0
  O  O33  1  0.702  0.232  0.975  1.0
  O  O34  1  0.202  0.475  0.732  1.0
  O  O35  1  0.298  0.768  0.025  1.0
  O  O36  1  0.112  0.188  0.574  1.0
  O  O37  1  0.388  0.926  0.312  1.0
  O  O38  1  0.888  0.812  0.426  1.0
  O  O39  1  0.612  0.074  0.688  1.0
  O  O40  1  0.620  0.685  0.055  1.0
  O  O41  1  0.880  0.445  0.815  1.0
  O  O42  1  0.380  0.315  0.945  1.0
  O  O43  1  0.120  0.555  0.185  1.0
  O  O44  1  0.002  0.936  0.679  1.0
  O  O45  1  0.498  0.821  0.564  1.0
  O  O46  1  0.998  0.064  0.321  1.0
  O  O47  1  0.502  0.179  0.436  1.0
  O  O48  1  0.507  0.422  0.179  1.0
  O  O49  1  0.993  0.321  0.078  1.0
  O  O50  1  0.493  0.578  0.821  1.0
  O  O51  1  0.007  0.679  0.922  1.0
[/CIF]
.
The crystal structure described by BaGa2Ge2O8 crystallizes in the monoclinic C2/c space group. Ba(1) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and two equivalent O(1) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(1), one O(4), one O(6), and one O(8) atom to form GaO4 tetrahedra that share  a cornercorner with one Ge(1)O4 tetrahedra and corners with three equivalent Ge(2)O4 tetrahedra. In the second Ga site, Ga(2) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form GaO4 tetrahedra that share  a cornercorner with one Ge(2)O4 tetrahedra and corners with three equivalent Ge(1)O4 tetrahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Ga(1)O4 tetrahedra and corners with three equivalent Ga(2)O4 tetrahedra. In the second Ge site, Ge(2) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form GeO4 tetrahedra that share  a cornercorner with one Ga(2)O4 tetrahedra and corners with three equivalent Ga(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a 3-coordinate geometry to one Ba(1), one Ga(2), and one Ge(1) atom. In the second O site, O(8) is bonded in a 3-coordinate geometry to one Ba(1), one Ga(1), and one Ge(2) atom. In the third O site, O(1) is bonded to two equivalent Ba(1), one Ga(1), and one Ge(1) atom to form distorted edge-sharing OBa2GaGe tetrahedra. In the fourth O site, O(2) is bonded in a trigonal planar geometry to one Ba(1), one Ga(2), and one Ge(2) atom. In the fifth O site, O(6) is bonded in a bent 120 degrees geometry to one Ba(1), one Ga(1), and one Ge(2) atom. In the sixth O site, O(3) is bonded in a 3-coordinate geometry to one Ba(1), one Ga(2), and one Ge(1) atom. In the seventh O site, O(4) is bonded in a 3-coordinate geometry to one Ba(1), one Ga(1), and one Ge(2) atom. In the eighth O site, O(5) is bonded in a bent 120 degrees geometry to one Ba(1), one Ga(2), and one Ge(1) atom. is represented by the CIF card [CIF]
data_BaGa2(GeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.943
_cell_length_b   9.683
_cell_length_c   9.683
_cell_angle_alpha   88.853
_cell_angle_beta   82.105
_cell_angle_gamma   82.105
_symmetry_Int_Tables_number   1
_cell_volume   822.745
_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
  Ba  Ba0  1  0.791  0.934  0.933  1.0
  Ba  Ba1  1  0.709  0.567  0.566  1.0
  Ba  Ba2  1  0.209  0.066  0.067  1.0
  Ba  Ba3  1  0.291  0.433  0.434  1.0
  Ga  Ga4  1  0.615  0.566  0.202  1.0
  Ga  Ga5  1  0.885  0.298  0.934  1.0
  Ga  Ga6  1  0.385  0.434  0.798  1.0
  Ga  Ga7  1  0.115  0.702  0.066  1.0
  Ga  Ga8  1  0.473  0.949  0.704  1.0
  Ga  Ga9  1  0.027  0.796  0.551  1.0
  Ga  Ga10  1  0.527  0.051  0.296  1.0
  Ga  Ga11  1  0.973  0.204  0.449  1.0
  Ge  Ge12  1  0.103  0.072  0.712  1.0
  Ge  Ge13  1  0.397  0.788  0.428  1.0
  Ge  Ge14  1  0.897  0.928  0.288  1.0
  Ge  Ge15  1  0.603  0.212  0.572  1.0
  Ge  Ge16  1  0.982  0.442  0.212  1.0
  Ge  Ge17  1  0.518  0.288  0.058  1.0
  Ge  Ge18  1  0.018  0.558  0.788  1.0
  Ge  Ge19  1  0.482  0.712  0.942  1.0
  O  O20  1  0.997  0.131  0.872  1.0
  O  O21  1  0.503  0.628  0.369  1.0
  O  O22  1  0.003  0.869  0.128  1.0
  O  O23  1  0.497  0.372  0.631  1.0
  O  O24  1  0.547  0.856  0.853  1.0
  O  O25  1  0.953  0.647  0.644  1.0
  O  O26  1  0.453  0.144  0.147  1.0
  O  O27  1  0.047  0.353  0.356  1.0
  O  O28  1  0.279  0.023  0.770  1.0
  O  O29  1  0.221  0.730  0.477  1.0
  O  O30  1  0.721  0.977  0.230  1.0
  O  O31  1  0.779  0.270  0.523  1.0
  O  O32  1  0.798  0.525  0.268  1.0
  O  O33  1  0.702  0.232  0.975  1.0
  O  O34  1  0.202  0.475  0.732  1.0
  O  O35  1  0.298  0.768  0.025  1.0
  O  O36  1  0.112  0.188  0.574  1.0
  O  O37  1  0.388  0.926  0.312  1.0
  O  O38  1  0.888  0.812  0.426  1.0
  O  O39  1  0.612  0.074  0.688  1.0
  O  O40  1  0.620  0.685  0.055  1.0
  O  O41  1  0.880  0.445  0.815  1.0
  O  O42  1  0.380  0.315  0.945  1.0
  O  O43  1  0.120  0.555  0.185  1.0
  O  O44  1  0.002  0.936  0.679  1.0
  O  O45  1  0.498  0.821  0.564  1.0
  O  O46  1  0.998  0.064  0.321  1.0
  O  O47  1  0.502  0.179  0.436  1.0
  O  O48  1  0.507  0.422  0.179  1.0
  O  O49  1  0.993  0.321  0.078  1.0
  O  O50  1  0.493  0.578  0.821  1.0
  O  O51  1  0.007  0.679  0.922  1.0
[/CIF]
.