The material structure described by B4SnO7 crystallizes in the orthorhombic Pmn2_1 space group. There are two inequivalent B sites. In the first B site, B(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing BO4 tetrahedra. In the second B site, B(2) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form corner-sharing BO4 tetrahedra. Sn(1) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(3), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent B(1) and one Sn(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one B(1) and two equivalent B(2) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one B(1), one B(2), and one Sn(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one B(1), one B(2), and one Sn(1) atom. is represented by the CIF file [CIF]
data_SnB4O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.236
_cell_length_b   4.452
_cell_length_c   10.882
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   205.238
_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
  Sn  Sn0  1  0.607  0.833  0.500  1.0
  Sn  Sn1  1  0.107  0.167  0.000  1.0
  B  B2  1  0.556  0.672  0.123  1.0
  B  B3  1  0.027  0.823  0.751  1.0
  B  B4  1  0.527  0.177  0.749  1.0
  B  B5  1  0.056  0.328  0.377  1.0
  B  B6  1  0.056  0.328  0.623  1.0
  B  B7  1  0.556  0.672  0.877  1.0
  B  B8  1  0.027  0.823  0.249  1.0
  B  B9  1  0.527  0.177  0.251  1.0
  O  O10  1  0.948  0.231  0.500  1.0
  O  O11  1  0.448  0.769  0.000  1.0
  O  O12  1  0.381  0.871  0.219  1.0
  O  O13  1  0.881  0.129  0.281  1.0
  O  O14  1  0.881  0.129  0.719  1.0
  O  O15  1  0.381  0.871  0.781  1.0
  O  O16  1  0.476  0.359  0.143  1.0
  O  O17  1  0.976  0.641  0.357  1.0
  O  O18  1  0.976  0.641  0.643  1.0
  O  O19  1  0.476  0.359  0.857  1.0
  O  O20  1  0.887  0.728  0.138  1.0
  O  O21  1  0.387  0.272  0.362  1.0
  O  O22  1  0.387  0.272  0.638  1.0
  O  O23  1  0.887  0.728  0.862  1.0
[/CIF]
.
The material structure described by B4SnO7 crystallizes in the orthorhombic Pmn2_1 space group. There are two inequivalent B sites. In the first B site, B(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing BO4 tetrahedra. In the second B site, B(2) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form corner-sharing BO4 tetrahedra. Sn(1) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(3), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent B(1) and one Sn(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one B(1) and two equivalent B(2) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one B(1), one B(2), and one Sn(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one B(1), one B(2), and one Sn(1) atom. is represented by the CIF file [CIF]
data_SnB4O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.236
_cell_length_b   4.452
_cell_length_c   10.882
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   205.238
_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
  Sn  Sn0  1  0.607  0.833  0.500  1.0
  Sn  Sn1  1  0.107  0.167  0.000  1.0
  B  B2  1  0.556  0.672  0.123  1.0
  B  B3  1  0.027  0.823  0.751  1.0
  B  B4  1  0.527  0.177  0.749  1.0
  B  B5  1  0.056  0.328  0.377  1.0
  B  B6  1  0.056  0.328  0.623  1.0
  B  B7  1  0.556  0.672  0.877  1.0
  B  B8  1  0.027  0.823  0.249  1.0
  B  B9  1  0.527  0.177  0.251  1.0
  O  O10  1  0.948  0.231  0.500  1.0
  O  O11  1  0.448  0.769  0.000  1.0
  O  O12  1  0.381  0.871  0.219  1.0
  O  O13  1  0.881  0.129  0.281  1.0
  O  O14  1  0.881  0.129  0.719  1.0
  O  O15  1  0.381  0.871  0.781  1.0
  O  O16  1  0.476  0.359  0.143  1.0
  O  O17  1  0.976  0.641  0.357  1.0
  O  O18  1  0.976  0.641  0.643  1.0
  O  O19  1  0.476  0.359  0.857  1.0
  O  O20  1  0.887  0.728  0.138  1.0
  O  O21  1  0.387  0.272  0.362  1.0
  O  O22  1  0.387  0.272  0.638  1.0
  O  O23  1  0.887  0.728  0.862  1.0
[/CIF]
.