The crystal structure described by SrGa2B2O7 crystallizes in the orthorhombic Cmcm space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Ga(1) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form corner-sharing GaO4 tetrahedra. B(1) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Sr(1) and two equivalent B(1) atoms. In the second O site, O(2) is bonded to two equivalent Sr(1) and two equivalent Ga(1) atoms to form a mixture of distorted edge and corner-sharing OSr2Ga2 tetrahedra. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(1), one Ga(1), and one B(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Ga(1) and one B(1) atom. is represented by the CIF file [CIF]
data_SrGa2B2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.274
_cell_length_b   7.274
_cell_length_c   5.801
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   109.092
_symmetry_Int_Tables_number   1
_cell_volume   290.059
_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
  Sr  Sr0  1  0.183  0.183  0.750  1.0
  Sr  Sr1  1  0.817  0.817  0.250  1.0
  Ga  Ga2  1  0.875  0.293  0.250  1.0
  Ga  Ga3  1  0.707  0.125  0.750  1.0
  Ga  Ga4  1  0.293  0.875  0.250  1.0
  Ga  Ga5  1  0.125  0.707  0.750  1.0
  B  B6  1  0.705  0.487  0.750  1.0
  B  B7  1  0.487  0.705  0.750  1.0
  B  B8  1  0.513  0.295  0.250  1.0
  B  B9  1  0.295  0.513  0.250  1.0
  O  O10  1  0.661  0.661  0.750  1.0
  O  O11  1  0.871  0.129  0.000  1.0
  O  O12  1  0.695  0.435  0.250  1.0
  O  O13  1  0.339  0.339  0.250  1.0
  O  O14  1  0.129  0.871  0.000  1.0
  O  O15  1  0.498  0.895  0.750  1.0
  O  O16  1  0.895  0.498  0.750  1.0
  O  O17  1  0.105  0.502  0.250  1.0
  O  O18  1  0.305  0.565  0.750  1.0
  O  O19  1  0.435  0.695  0.250  1.0
  O  O20  1  0.502  0.105  0.250  1.0
  O  O21  1  0.871  0.129  0.500  1.0
  O  O22  1  0.129  0.871  0.500  1.0
  O  O23  1  0.565  0.305  0.750  1.0
[/CIF]
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The crystal structure described by SrGa2B2O7 crystallizes in the orthorhombic Cmcm space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Ga(1) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form corner-sharing GaO4 tetrahedra. B(1) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Sr(1) and two equivalent B(1) atoms. In the second O site, O(2) is bonded to two equivalent Sr(1) and two equivalent Ga(1) atoms to form a mixture of distorted edge and corner-sharing OSr2Ga2 tetrahedra. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(1), one Ga(1), and one B(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Ga(1) and one B(1) atom. is represented by the CIF file [CIF]
data_SrGa2B2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.274
_cell_length_b   7.274
_cell_length_c   5.801
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   109.092
_symmetry_Int_Tables_number   1
_cell_volume   290.059
_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
  Sr  Sr0  1  0.183  0.183  0.750  1.0
  Sr  Sr1  1  0.817  0.817  0.250  1.0
  Ga  Ga2  1  0.875  0.293  0.250  1.0
  Ga  Ga3  1  0.707  0.125  0.750  1.0
  Ga  Ga4  1  0.293  0.875  0.250  1.0
  Ga  Ga5  1  0.125  0.707  0.750  1.0
  B  B6  1  0.705  0.487  0.750  1.0
  B  B7  1  0.487  0.705  0.750  1.0
  B  B8  1  0.513  0.295  0.250  1.0
  B  B9  1  0.295  0.513  0.250  1.0
  O  O10  1  0.661  0.661  0.750  1.0
  O  O11  1  0.871  0.129  0.000  1.0
  O  O12  1  0.695  0.435  0.250  1.0
  O  O13  1  0.339  0.339  0.250  1.0
  O  O14  1  0.129  0.871  0.000  1.0
  O  O15  1  0.498  0.895  0.750  1.0
  O  O16  1  0.895  0.498  0.750  1.0
  O  O17  1  0.105  0.502  0.250  1.0
  O  O18  1  0.305  0.565  0.750  1.0
  O  O19  1  0.435  0.695  0.250  1.0
  O  O20  1  0.502  0.105  0.250  1.0
  O  O21  1  0.871  0.129  0.500  1.0
  O  O22  1  0.129  0.871  0.500  1.0
  O  O23  1  0.565  0.305  0.750  1.0
[/CIF]
.