The structure described by CsBe4Al4(B3O7)4 crystallizes in the cubic P-43m space group. Cs(1) is bonded in a 12-coordinate geometry to twelve equivalent O(3) atoms. Be(1) is bonded to one O(1) and three equivalent O(3) atoms to form BeO4 tetrahedra that share corners with three equivalent Al(1)O6 octahedra and corners with six equivalent B(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. Al(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form AlO6 octahedra that share corners with three equivalent Be(1)O4 tetrahedra, corners with six equivalent B(1)O4 tetrahedra, and edges with three equivalent Al(1)O6 octahedra. B(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form BO4 tetrahedra that share corners with two equivalent Al(1)O6 octahedra, corners with two equivalent Be(1)O4 tetrahedra, and corners with four equivalent B(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 62°. There are three inequivalent O sites. In the first O site, O(3) is bonded in a trigonal non-coplanar geometry to one Cs(1), one Be(1), and two equivalent B(1) atoms. In the second O site, O(1) is bonded to one Be(1) and three equivalent Al(1) atoms to form distorted edge-sharing OBeAl3 tetrahedra. In the third O site, O(2) is bonded in a trigonal planar geometry to one Al(1) and two equivalent B(1) atoms. is represented by the CIF file [CIF]
data_CsBe4Al4(B3O7)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.418
_cell_length_b   7.418
_cell_length_c   7.418
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   408.225
_cell_formula_units_Z   1
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
  Cs  Cs0  1  0.000  0.000  0.000  1.0
  Be  Be1  1  0.740  0.740  0.740  1.0
  Be  Be2  1  0.260  0.740  0.260  1.0
  Be  Be3  1  0.260  0.260  0.740  1.0
  Be  Be4  1  0.740  0.260  0.260  1.0
  Al  Al5  1  0.360  0.360  0.360  1.0
  Al  Al6  1  0.640  0.360  0.640  1.0
  Al  Al7  1  0.640  0.640  0.360  1.0
  Al  Al8  1  0.360  0.640  0.640  1.0
  B  B9  1  0.249  0.500  0.000  1.0
  B  B10  1  0.751  0.000  0.500  1.0
  B  B11  1  0.000  0.500  0.249  1.0
  B  B12  1  0.000  0.500  0.751  1.0
  B  B13  1  0.500  0.751  0.000  1.0
  B  B14  1  0.500  0.249  0.000  1.0
  B  B15  1  0.000  0.249  0.500  1.0
  B  B16  1  0.500  0.000  0.249  1.0
  B  B17  1  0.000  0.751  0.500  1.0
  B  B18  1  0.500  0.000  0.751  1.0
  B  B19  1  0.751  0.500  0.000  1.0
  B  B20  1  0.249  0.000  0.500  1.0
  O  O21  1  0.618  0.618  0.618  1.0
  O  O22  1  0.382  0.618  0.382  1.0
  O  O23  1  0.382  0.382  0.618  1.0
  O  O24  1  0.618  0.382  0.382  1.0
  O  O25  1  0.362  0.362  0.095  1.0
  O  O26  1  0.638  0.095  0.638  1.0
  O  O27  1  0.638  0.905  0.362  1.0
  O  O28  1  0.905  0.638  0.362  1.0
  O  O29  1  0.095  0.638  0.638  1.0
  O  O30  1  0.362  0.638  0.905  1.0
  O  O31  1  0.638  0.362  0.905  1.0
  O  O32  1  0.095  0.362  0.362  1.0
  O  O33  1  0.362  0.095  0.362  1.0
  O  O34  1  0.905  0.362  0.638  1.0
  O  O35  1  0.362  0.905  0.638  1.0
  O  O36  1  0.638  0.638  0.095  1.0
  O  O37  1  0.137  0.137  0.596  1.0
  O  O38  1  0.863  0.596  0.863  1.0
  O  O39  1  0.863  0.404  0.137  1.0
  O  O40  1  0.404  0.863  0.137  1.0
  O  O41  1  0.596  0.863  0.863  1.0
  O  O42  1  0.137  0.863  0.404  1.0
  O  O43  1  0.863  0.137  0.404  1.0
  O  O44  1  0.596  0.137  0.137  1.0
  O  O45  1  0.137  0.596  0.137  1.0
  O  O46  1  0.404  0.137  0.863  1.0
  O  O47  1  0.137  0.404  0.863  1.0
  O  O48  1  0.863  0.863  0.596  1.0
[/CIF]
.
The structure described by CsBe4Al4(B3O7)4 crystallizes in the cubic P-43m space group. Cs(1) is bonded in a 12-coordinate geometry to twelve equivalent O(3) atoms. Be(1) is bonded to one O(1) and three equivalent O(3) atoms to form BeO4 tetrahedra that share corners with three equivalent Al(1)O6 octahedra and corners with six equivalent B(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. Al(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form AlO6 octahedra that share corners with three equivalent Be(1)O4 tetrahedra, corners with six equivalent B(1)O4 tetrahedra, and edges with three equivalent Al(1)O6 octahedra. B(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form BO4 tetrahedra that share corners with two equivalent Al(1)O6 octahedra, corners with two equivalent Be(1)O4 tetrahedra, and corners with four equivalent B(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 62°. There are three inequivalent O sites. In the first O site, O(3) is bonded in a trigonal non-coplanar geometry to one Cs(1), one Be(1), and two equivalent B(1) atoms. In the second O site, O(1) is bonded to one Be(1) and three equivalent Al(1) atoms to form distorted edge-sharing OBeAl3 tetrahedra. In the third O site, O(2) is bonded in a trigonal planar geometry to one Al(1) and two equivalent B(1) atoms. is represented by the CIF file [CIF]
data_CsBe4Al4(B3O7)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.418
_cell_length_b   7.418
_cell_length_c   7.418
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   408.225
_cell_formula_units_Z   1
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
  Cs  Cs0  1  0.000  0.000  0.000  1.0
  Be  Be1  1  0.740  0.740  0.740  1.0
  Be  Be2  1  0.260  0.740  0.260  1.0
  Be  Be3  1  0.260  0.260  0.740  1.0
  Be  Be4  1  0.740  0.260  0.260  1.0
  Al  Al5  1  0.360  0.360  0.360  1.0
  Al  Al6  1  0.640  0.360  0.640  1.0
  Al  Al7  1  0.640  0.640  0.360  1.0
  Al  Al8  1  0.360  0.640  0.640  1.0
  B  B9  1  0.249  0.500  0.000  1.0
  B  B10  1  0.751  0.000  0.500  1.0
  B  B11  1  0.000  0.500  0.249  1.0
  B  B12  1  0.000  0.500  0.751  1.0
  B  B13  1  0.500  0.751  0.000  1.0
  B  B14  1  0.500  0.249  0.000  1.0
  B  B15  1  0.000  0.249  0.500  1.0
  B  B16  1  0.500  0.000  0.249  1.0
  B  B17  1  0.000  0.751  0.500  1.0
  B  B18  1  0.500  0.000  0.751  1.0
  B  B19  1  0.751  0.500  0.000  1.0
  B  B20  1  0.249  0.000  0.500  1.0
  O  O21  1  0.618  0.618  0.618  1.0
  O  O22  1  0.382  0.618  0.382  1.0
  O  O23  1  0.382  0.382  0.618  1.0
  O  O24  1  0.618  0.382  0.382  1.0
  O  O25  1  0.362  0.362  0.095  1.0
  O  O26  1  0.638  0.095  0.638  1.0
  O  O27  1  0.638  0.905  0.362  1.0
  O  O28  1  0.905  0.638  0.362  1.0
  O  O29  1  0.095  0.638  0.638  1.0
  O  O30  1  0.362  0.638  0.905  1.0
  O  O31  1  0.638  0.362  0.905  1.0
  O  O32  1  0.095  0.362  0.362  1.0
  O  O33  1  0.362  0.095  0.362  1.0
  O  O34  1  0.905  0.362  0.638  1.0
  O  O35  1  0.362  0.905  0.638  1.0
  O  O36  1  0.638  0.638  0.095  1.0
  O  O37  1  0.137  0.137  0.596  1.0
  O  O38  1  0.863  0.596  0.863  1.0
  O  O39  1  0.863  0.404  0.137  1.0
  O  O40  1  0.404  0.863  0.137  1.0
  O  O41  1  0.596  0.863  0.863  1.0
  O  O42  1  0.137  0.863  0.404  1.0
  O  O43  1  0.863  0.137  0.404  1.0
  O  O44  1  0.596  0.137  0.137  1.0
  O  O45  1  0.137  0.596  0.137  1.0
  O  O46  1  0.404  0.137  0.863  1.0
  O  O47  1  0.137  0.404  0.863  1.0
  O  O48  1  0.863  0.863  0.596  1.0
[/CIF]
.