The material structure described by Ba2TiGe2O8 crystallizes in the tetragonal P4bm space group. Ba(1) is bonded in a 8-coordinate geometry to one O(4), three equivalent O(2), and four equivalent O(3) atoms. Ti(1) is bonded in a 5-coordinate geometry to one O(1) and four equivalent O(3) atoms. Ge(1) is bonded to one O(2), one O(4), and two equivalent O(3) atoms to form corner-sharing GeO4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Ti(1) atom. In the second O site, O(2) is bonded to three equivalent Ba(1) and one Ge(1) atom to form distorted OBa3Ge tetrahedra that share corners with two equivalent O(4)Ba2Ge2 tetrahedra, corners with four equivalent O(2)Ba3Ge tetrahedra,  an edgeedge with one O(4)Ba2Ge2 tetrahedra, and  an edgeedge with one O(2)Ba3Ge tetrahedra. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Ba(1), one Ti(1), and one Ge(1) atom. In the fourth O site, O(4) is bonded to two equivalent Ba(1) and two equivalent Ge(1) atoms to form a mixture of distorted corner and edge-sharing OBa2Ge2 tetrahedra. is represented by the CIF file [CIF]
data_Ba2Ti(GeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.848
_cell_length_b   8.848
_cell_length_c   5.487
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   429.616
_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
  Ba  Ba0  1  0.828  0.328  0.016  1.0
  Ba  Ba1  1  0.328  0.172  0.016  1.0
  Ba  Ba2  1  0.172  0.672  0.016  1.0
  Ba  Ba3  1  0.672  0.828  0.016  1.0
  Ti  Ti4  1  0.000  0.000  0.454  1.0
  Ti  Ti5  1  0.500  0.500  0.454  1.0
  Ge  Ge6  1  0.632  0.132  0.491  1.0
  Ge  Ge7  1  0.132  0.368  0.491  1.0
  Ge  Ge8  1  0.368  0.868  0.491  1.0
  Ge  Ge9  1  0.868  0.632  0.491  1.0
  O  O10  1  0.000  0.000  0.764  1.0
  O  O11  1  0.500  0.500  0.764  1.0
  O  O12  1  0.872  0.628  0.806  1.0
  O  O13  1  0.128  0.372  0.806  1.0
  O  O14  1  0.081  0.199  0.341  1.0
  O  O15  1  0.699  0.581  0.341  1.0
  O  O16  1  0.301  0.419  0.341  1.0
  O  O17  1  0.500  0.000  0.354  1.0
  O  O18  1  0.801  0.081  0.341  1.0
  O  O19  1  0.199  0.919  0.341  1.0
  O  O20  1  0.581  0.301  0.341  1.0
  O  O21  1  0.419  0.699  0.341  1.0
  O  O22  1  0.919  0.801  0.341  1.0
  O  O23  1  0.000  0.500  0.354  1.0
  O  O24  1  0.628  0.128  0.806  1.0
  O  O25  1  0.372  0.872  0.806  1.0
[/CIF]
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The material structure described by Ba2TiGe2O8 crystallizes in the tetragonal P4bm space group. Ba(1) is bonded in a 8-coordinate geometry to one O(4), three equivalent O(2), and four equivalent O(3) atoms. Ti(1) is bonded in a 5-coordinate geometry to one O(1) and four equivalent O(3) atoms. Ge(1) is bonded to one O(2), one O(4), and two equivalent O(3) atoms to form corner-sharing GeO4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Ti(1) atom. In the second O site, O(2) is bonded to three equivalent Ba(1) and one Ge(1) atom to form distorted OBa3Ge tetrahedra that share corners with two equivalent O(4)Ba2Ge2 tetrahedra, corners with four equivalent O(2)Ba3Ge tetrahedra,  an edgeedge with one O(4)Ba2Ge2 tetrahedra, and  an edgeedge with one O(2)Ba3Ge tetrahedra. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Ba(1), one Ti(1), and one Ge(1) atom. In the fourth O site, O(4) is bonded to two equivalent Ba(1) and two equivalent Ge(1) atoms to form a mixture of distorted corner and edge-sharing OBa2Ge2 tetrahedra. is represented by the CIF file [CIF]
data_Ba2Ti(GeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.848
_cell_length_b   8.848
_cell_length_c   5.487
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   429.616
_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
  Ba  Ba0  1  0.828  0.328  0.016  1.0
  Ba  Ba1  1  0.328  0.172  0.016  1.0
  Ba  Ba2  1  0.172  0.672  0.016  1.0
  Ba  Ba3  1  0.672  0.828  0.016  1.0
  Ti  Ti4  1  0.000  0.000  0.454  1.0
  Ti  Ti5  1  0.500  0.500  0.454  1.0
  Ge  Ge6  1  0.632  0.132  0.491  1.0
  Ge  Ge7  1  0.132  0.368  0.491  1.0
  Ge  Ge8  1  0.368  0.868  0.491  1.0
  Ge  Ge9  1  0.868  0.632  0.491  1.0
  O  O10  1  0.000  0.000  0.764  1.0
  O  O11  1  0.500  0.500  0.764  1.0
  O  O12  1  0.872  0.628  0.806  1.0
  O  O13  1  0.128  0.372  0.806  1.0
  O  O14  1  0.081  0.199  0.341  1.0
  O  O15  1  0.699  0.581  0.341  1.0
  O  O16  1  0.301  0.419  0.341  1.0
  O  O17  1  0.500  0.000  0.354  1.0
  O  O18  1  0.801  0.081  0.341  1.0
  O  O19  1  0.199  0.919  0.341  1.0
  O  O20  1  0.581  0.301  0.341  1.0
  O  O21  1  0.419  0.699  0.341  1.0
  O  O22  1  0.919  0.801  0.341  1.0
  O  O23  1  0.000  0.500  0.354  1.0
  O  O24  1  0.628  0.128  0.806  1.0
  O  O25  1  0.372  0.872  0.806  1.0
[/CIF]
.