The structure described by Cd3(BO2)7 crystallizes in the trigonal R3c space group. Cd(1) is bonded to one O(1), one O(3), one O(4), one O(5), and one O(6) atom to form CdO5 trigonal bipyramids that share corners with three equivalent B(2)O4 tetrahedra, corners with four equivalent B(1)O4 tetrahedra, and corners with two equivalent Cd(1)O5 trigonal bipyramids. There are three inequivalent B sites. In the first B site, B(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form BO4 tetrahedra that share corners with three equivalent B(2)O4 tetrahedra and corners with four equivalent Cd(1)O5 trigonal bipyramids. In the second B site, B(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form BO4 tetrahedra that share corners with two equivalent B(2)O4 tetrahedra, corners with three equivalent B(1)O4 tetrahedra, and corners with three equivalent Cd(1)O5 trigonal bipyramids. In the third B site, B(3) is bonded in a trigonal planar geometry to three equivalent O(3) atoms. There are six inequivalent O sites. In the first O site, O(3) is bonded in a distorted trigonal planar geometry to one Cd(1), one B(1), and one B(3) atom. In the second O site, O(4) is bonded in a distorted trigonal planar geometry to one Cd(1), one B(1), and one B(2) atom. In the third O site, O(5) is bonded in a distorted trigonal planar geometry to one Cd(1), one B(1), and one B(2) atom. In the fourth O site, O(6) is bonded in a distorted trigonal planar geometry to one Cd(1), one B(1), and one B(2) atom. In the fifth O site, O(2) is bonded in a trigonal planar geometry to three equivalent B(2) atoms. In the sixth O site, O(1) is bonded in a trigonal non-coplanar geometry to three equivalent Cd(1) atoms. is represented by the CIF card [CIF]
data_Cd3(BO2)7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.867
_cell_length_b   8.867
_cell_length_c   8.867
_cell_angle_alpha   60.419
_cell_angle_beta   60.419
_cell_angle_gamma   60.419
_symmetry_Int_Tables_number   1
_cell_volume   497.711
_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
  Cd  Cd0  1  0.951  0.956  0.546  1.0
  Cd  Cd1  1  0.546  0.951  0.956  1.0
  Cd  Cd2  1  0.956  0.546  0.951  1.0
  Cd  Cd3  1  0.046  0.456  0.451  1.0
  Cd  Cd4  1  0.451  0.046  0.456  1.0
  Cd  Cd5  1  0.456  0.451  0.046  1.0
  B  B6  1  0.746  0.254  0.750  1.0
  B  B7  1  0.750  0.746  0.254  1.0
  B  B8  1  0.254  0.750  0.746  1.0
  B  B9  1  0.250  0.754  0.246  1.0
  B  B10  1  0.246  0.250  0.754  1.0
  B  B11  1  0.754  0.246  0.250  1.0
  B  B12  1  0.571  0.271  0.571  1.0
  B  B13  1  0.571  0.571  0.271  1.0
  B  B14  1  0.271  0.571  0.571  1.0
  B  B15  1  0.071  0.771  0.071  1.0
  B  B16  1  0.071  0.071  0.771  1.0
  B  B17  1  0.771  0.071  0.071  1.0
  B  B18  1  0.603  0.603  0.603  1.0
  B  B19  1  0.103  0.103  0.103  1.0
  O  O20  1  0.783  0.783  0.783  1.0
  O  O21  1  0.283  0.283  0.283  1.0
  O  O22  1  0.486  0.486  0.486  1.0
  O  O23  1  0.986  0.986  0.986  1.0
  O  O24  1  0.446  0.755  0.618  1.0
  O  O25  1  0.618  0.446  0.755  1.0
  O  O26  1  0.755  0.618  0.446  1.0
  O  O27  1  0.118  0.255  0.946  1.0
  O  O28  1  0.946  0.118  0.255  1.0
  O  O29  1  0.255  0.946  0.118  1.0
  O  O30  1  0.741  0.434  0.206  1.0
  O  O31  1  0.206  0.741  0.434  1.0
  O  O32  1  0.434  0.206  0.741  1.0
  O  O33  1  0.706  0.934  0.241  1.0
  O  O34  1  0.241  0.706  0.934  1.0
  O  O35  1  0.934  0.241  0.706  1.0
  O  O36  1  0.624  0.187  0.436  1.0
  O  O37  1  0.436  0.624  0.187  1.0
  O  O38  1  0.187  0.436  0.624  1.0
  O  O39  1  0.936  0.687  0.124  1.0
  O  O40  1  0.124  0.936  0.687  1.0
  O  O41  1  0.687  0.124  0.936  1.0
  O  O42  1  0.221  0.609  0.736  1.0
  O  O43  1  0.736  0.221  0.609  1.0
  O  O44  1  0.609  0.736  0.221  1.0
  O  O45  1  0.236  0.109  0.721  1.0
  O  O46  1  0.721  0.236  0.109  1.0
  O  O47  1  0.109  0.721  0.236  1.0
[/CIF]
.
The structure described by Cd3(BO2)7 crystallizes in the trigonal R3c space group. Cd(1) is bonded to one O(1), one O(3), one O(4), one O(5), and one O(6) atom to form CdO5 trigonal bipyramids that share corners with three equivalent B(2)O4 tetrahedra, corners with four equivalent B(1)O4 tetrahedra, and corners with two equivalent Cd(1)O5 trigonal bipyramids. There are three inequivalent B sites. In the first B site, B(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form BO4 tetrahedra that share corners with three equivalent B(2)O4 tetrahedra and corners with four equivalent Cd(1)O5 trigonal bipyramids. In the second B site, B(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form BO4 tetrahedra that share corners with two equivalent B(2)O4 tetrahedra, corners with three equivalent B(1)O4 tetrahedra, and corners with three equivalent Cd(1)O5 trigonal bipyramids. In the third B site, B(3) is bonded in a trigonal planar geometry to three equivalent O(3) atoms. There are six inequivalent O sites. In the first O site, O(3) is bonded in a distorted trigonal planar geometry to one Cd(1), one B(1), and one B(3) atom. In the second O site, O(4) is bonded in a distorted trigonal planar geometry to one Cd(1), one B(1), and one B(2) atom. In the third O site, O(5) is bonded in a distorted trigonal planar geometry to one Cd(1), one B(1), and one B(2) atom. In the fourth O site, O(6) is bonded in a distorted trigonal planar geometry to one Cd(1), one B(1), and one B(2) atom. In the fifth O site, O(2) is bonded in a trigonal planar geometry to three equivalent B(2) atoms. In the sixth O site, O(1) is bonded in a trigonal non-coplanar geometry to three equivalent Cd(1) atoms. is represented by the CIF card [CIF]
data_Cd3(BO2)7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.867
_cell_length_b   8.867
_cell_length_c   8.867
_cell_angle_alpha   60.419
_cell_angle_beta   60.419
_cell_angle_gamma   60.419
_symmetry_Int_Tables_number   1
_cell_volume   497.711
_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
  Cd  Cd0  1  0.951  0.956  0.546  1.0
  Cd  Cd1  1  0.546  0.951  0.956  1.0
  Cd  Cd2  1  0.956  0.546  0.951  1.0
  Cd  Cd3  1  0.046  0.456  0.451  1.0
  Cd  Cd4  1  0.451  0.046  0.456  1.0
  Cd  Cd5  1  0.456  0.451  0.046  1.0
  B  B6  1  0.746  0.254  0.750  1.0
  B  B7  1  0.750  0.746  0.254  1.0
  B  B8  1  0.254  0.750  0.746  1.0
  B  B9  1  0.250  0.754  0.246  1.0
  B  B10  1  0.246  0.250  0.754  1.0
  B  B11  1  0.754  0.246  0.250  1.0
  B  B12  1  0.571  0.271  0.571  1.0
  B  B13  1  0.571  0.571  0.271  1.0
  B  B14  1  0.271  0.571  0.571  1.0
  B  B15  1  0.071  0.771  0.071  1.0
  B  B16  1  0.071  0.071  0.771  1.0
  B  B17  1  0.771  0.071  0.071  1.0
  B  B18  1  0.603  0.603  0.603  1.0
  B  B19  1  0.103  0.103  0.103  1.0
  O  O20  1  0.783  0.783  0.783  1.0
  O  O21  1  0.283  0.283  0.283  1.0
  O  O22  1  0.486  0.486  0.486  1.0
  O  O23  1  0.986  0.986  0.986  1.0
  O  O24  1  0.446  0.755  0.618  1.0
  O  O25  1  0.618  0.446  0.755  1.0
  O  O26  1  0.755  0.618  0.446  1.0
  O  O27  1  0.118  0.255  0.946  1.0
  O  O28  1  0.946  0.118  0.255  1.0
  O  O29  1  0.255  0.946  0.118  1.0
  O  O30  1  0.741  0.434  0.206  1.0
  O  O31  1  0.206  0.741  0.434  1.0
  O  O32  1  0.434  0.206  0.741  1.0
  O  O33  1  0.706  0.934  0.241  1.0
  O  O34  1  0.241  0.706  0.934  1.0
  O  O35  1  0.934  0.241  0.706  1.0
  O  O36  1  0.624  0.187  0.436  1.0
  O  O37  1  0.436  0.624  0.187  1.0
  O  O38  1  0.187  0.436  0.624  1.0
  O  O39  1  0.936  0.687  0.124  1.0
  O  O40  1  0.124  0.936  0.687  1.0
  O  O41  1  0.687  0.124  0.936  1.0
  O  O42  1  0.221  0.609  0.736  1.0
  O  O43  1  0.736  0.221  0.609  1.0
  O  O44  1  0.609  0.736  0.221  1.0
  O  O45  1  0.236  0.109  0.721  1.0
  O  O46  1  0.721  0.236  0.109  1.0
  O  O47  1  0.109  0.721  0.236  1.0
[/CIF]
.