The material structure described by BaSi2O5 crystallizes in the orthorhombic Pnma space group. Ba(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(1), and six equivalent O(2) atoms. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form corner-sharing SiO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Ba(1) and two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Ba(1) and one Si(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ba(1) and two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_BaSi2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.640
_cell_length_b   7.708
_cell_length_c   13.618
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   486.958
_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  0.279  0.750  0.044  1.0
  Ba  Ba1  1  0.779  0.250  0.456  1.0
  Ba  Ba2  1  0.721  0.250  0.956  1.0
  Ba  Ba3  1  0.221  0.750  0.544  1.0
  Si  Si4  1  0.640  0.048  0.684  1.0
  Si  Si5  1  0.140  0.952  0.816  1.0
  Si  Si6  1  0.360  0.548  0.316  1.0
  Si  Si7  1  0.860  0.452  0.184  1.0
  Si  Si8  1  0.360  0.952  0.316  1.0
  Si  Si9  1  0.860  0.048  0.184  1.0
  Si  Si10  1  0.640  0.452  0.684  1.0
  Si  Si11  1  0.140  0.548  0.816  1.0
  O  O12  1  0.849  0.053  0.781  1.0
  O  O13  1  0.349  0.947  0.719  1.0
  O  O14  1  0.151  0.553  0.219  1.0
  O  O15  1  0.651  0.447  0.281  1.0
  O  O16  1  0.151  0.947  0.219  1.0
  O  O17  1  0.651  0.053  0.281  1.0
  O  O18  1  0.849  0.447  0.781  1.0
  O  O19  1  0.349  0.553  0.719  1.0
  O  O20  1  0.762  0.962  0.587  1.0
  O  O21  1  0.262  0.038  0.913  1.0
  O  O22  1  0.238  0.462  0.413  1.0
  O  O23  1  0.738  0.538  0.087  1.0
  O  O24  1  0.048  0.750  0.838  1.0
  O  O25  1  0.548  0.250  0.662  1.0
  O  O26  1  0.952  0.250  0.162  1.0
  O  O27  1  0.452  0.750  0.338  1.0
  O  O28  1  0.262  0.462  0.913  1.0
  O  O29  1  0.762  0.538  0.587  1.0
  O  O30  1  0.738  0.962  0.087  1.0
  O  O31  1  0.238  0.038  0.413  1.0
[/CIF]
.
The material structure described by BaSi2O5 crystallizes in the orthorhombic Pnma space group. Ba(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(1), and six equivalent O(2) atoms. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form corner-sharing SiO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Ba(1) and two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Ba(1) and one Si(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ba(1) and two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_BaSi2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.640
_cell_length_b   7.708
_cell_length_c   13.618
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   486.958
_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  0.279  0.750  0.044  1.0
  Ba  Ba1  1  0.779  0.250  0.456  1.0
  Ba  Ba2  1  0.721  0.250  0.956  1.0
  Ba  Ba3  1  0.221  0.750  0.544  1.0
  Si  Si4  1  0.640  0.048  0.684  1.0
  Si  Si5  1  0.140  0.952  0.816  1.0
  Si  Si6  1  0.360  0.548  0.316  1.0
  Si  Si7  1  0.860  0.452  0.184  1.0
  Si  Si8  1  0.360  0.952  0.316  1.0
  Si  Si9  1  0.860  0.048  0.184  1.0
  Si  Si10  1  0.640  0.452  0.684  1.0
  Si  Si11  1  0.140  0.548  0.816  1.0
  O  O12  1  0.849  0.053  0.781  1.0
  O  O13  1  0.349  0.947  0.719  1.0
  O  O14  1  0.151  0.553  0.219  1.0
  O  O15  1  0.651  0.447  0.281  1.0
  O  O16  1  0.151  0.947  0.219  1.0
  O  O17  1  0.651  0.053  0.281  1.0
  O  O18  1  0.849  0.447  0.781  1.0
  O  O19  1  0.349  0.553  0.719  1.0
  O  O20  1  0.762  0.962  0.587  1.0
  O  O21  1  0.262  0.038  0.913  1.0
  O  O22  1  0.238  0.462  0.413  1.0
  O  O23  1  0.738  0.538  0.087  1.0
  O  O24  1  0.048  0.750  0.838  1.0
  O  O25  1  0.548  0.250  0.662  1.0
  O  O26  1  0.952  0.250  0.162  1.0
  O  O27  1  0.452  0.750  0.338  1.0
  O  O28  1  0.262  0.462  0.913  1.0
  O  O29  1  0.762  0.538  0.587  1.0
  O  O30  1  0.738  0.962  0.087  1.0
  O  O31  1  0.238  0.038  0.413  1.0
[/CIF]
.