The structure described by Be3Fe4Si3SeO12 crystallizes in the cubic P-43n space group. Be(1) is bonded to four equivalent O(1) atoms to form BeO4 tetrahedra that share corners with four equivalent Fe(1)SeO3 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. Fe(1) is bonded to one Se(1) and three equivalent O(1) atoms to form distorted FeSeO3 tetrahedra that share corners with three equivalent Be(1)O4 tetrahedra, corners with three equivalent Fe(1)SeO3 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. Si(1) is bonded to four equivalent O(1) atoms to form SiO4 tetrahedra that share corners with four equivalent Be(1)O4 tetrahedra and corners with four equivalent Fe(1)SeO3 tetrahedra. Se(1) is bonded in a tetrahedral geometry to four equivalent Fe(1) atoms. O(1) is bonded in a trigonal planar geometry to one Be(1), one Fe(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Be3Fe4Si3SeO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.365
_cell_length_b   8.365
_cell_length_c   8.365
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   585.345
_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
  Be  Be0  1  0.500  0.250  0.000  1.0
  Be  Be1  1  0.750  0.000  0.500  1.0
  Be  Be2  1  0.000  0.500  0.250  1.0
  Be  Be3  1  0.000  0.500  0.750  1.0
  Be  Be4  1  0.500  0.750  0.000  1.0
  Be  Be5  1  0.250  0.000  0.500  1.0
  Fe  Fe6  1  0.175  0.175  0.175  1.0
  Fe  Fe7  1  0.325  0.675  0.325  1.0
  Fe  Fe8  1  0.175  0.825  0.825  1.0
  Fe  Fe9  1  0.825  0.175  0.825  1.0
  Fe  Fe10  1  0.325  0.325  0.675  1.0
  Fe  Fe11  1  0.675  0.325  0.325  1.0
  Fe  Fe12  1  0.675  0.675  0.675  1.0
  Fe  Fe13  1  0.825  0.825  0.175  1.0
  Si  Si14  1  0.500  0.000  0.750  1.0
  Si  Si15  1  0.000  0.750  0.500  1.0
  Si  Si16  1  0.000  0.250  0.500  1.0
  Si  Si17  1  0.500  0.000  0.250  1.0
  Si  Si18  1  0.250  0.500  0.000  1.0
  Si  Si19  1  0.750  0.500  0.000  1.0
  Se  Se20  1  0.000  0.000  0.000  1.0
  Se  Se21  1  0.500  0.500  0.500  1.0
  O  O22  1  0.356  0.360  0.914  1.0
  O  O23  1  0.856  0.414  0.860  1.0
  O  O24  1  0.360  0.086  0.644  1.0
  O  O25  1  0.640  0.086  0.356  1.0
  O  O26  1  0.640  0.914  0.644  1.0
  O  O27  1  0.086  0.644  0.360  1.0
  O  O28  1  0.860  0.144  0.586  1.0
  O  O29  1  0.856  0.586  0.140  1.0
  O  O30  1  0.086  0.356  0.640  1.0
  O  O31  1  0.144  0.586  0.860  1.0
  O  O32  1  0.586  0.140  0.856  1.0
  O  O33  1  0.644  0.640  0.914  1.0
  O  O34  1  0.914  0.356  0.360  1.0
  O  O35  1  0.356  0.640  0.086  1.0
  O  O36  1  0.414  0.140  0.144  1.0
  O  O37  1  0.140  0.856  0.586  1.0
  O  O38  1  0.644  0.360  0.086  1.0
  O  O39  1  0.140  0.144  0.414  1.0
  O  O40  1  0.586  0.860  0.144  1.0
  O  O41  1  0.144  0.414  0.140  1.0
  O  O42  1  0.414  0.860  0.856  1.0
  O  O43  1  0.914  0.644  0.640  1.0
  O  O44  1  0.860  0.856  0.414  1.0
  O  O45  1  0.360  0.914  0.356  1.0
[/CIF]
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The structure described by Be3Fe4Si3SeO12 crystallizes in the cubic P-43n space group. Be(1) is bonded to four equivalent O(1) atoms to form BeO4 tetrahedra that share corners with four equivalent Fe(1)SeO3 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. Fe(1) is bonded to one Se(1) and three equivalent O(1) atoms to form distorted FeSeO3 tetrahedra that share corners with three equivalent Be(1)O4 tetrahedra, corners with three equivalent Fe(1)SeO3 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. Si(1) is bonded to four equivalent O(1) atoms to form SiO4 tetrahedra that share corners with four equivalent Be(1)O4 tetrahedra and corners with four equivalent Fe(1)SeO3 tetrahedra. Se(1) is bonded in a tetrahedral geometry to four equivalent Fe(1) atoms. O(1) is bonded in a trigonal planar geometry to one Be(1), one Fe(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Be3Fe4Si3SeO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.365
_cell_length_b   8.365
_cell_length_c   8.365
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   585.345
_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
  Be  Be0  1  0.500  0.250  0.000  1.0
  Be  Be1  1  0.750  0.000  0.500  1.0
  Be  Be2  1  0.000  0.500  0.250  1.0
  Be  Be3  1  0.000  0.500  0.750  1.0
  Be  Be4  1  0.500  0.750  0.000  1.0
  Be  Be5  1  0.250  0.000  0.500  1.0
  Fe  Fe6  1  0.175  0.175  0.175  1.0
  Fe  Fe7  1  0.325  0.675  0.325  1.0
  Fe  Fe8  1  0.175  0.825  0.825  1.0
  Fe  Fe9  1  0.825  0.175  0.825  1.0
  Fe  Fe10  1  0.325  0.325  0.675  1.0
  Fe  Fe11  1  0.675  0.325  0.325  1.0
  Fe  Fe12  1  0.675  0.675  0.675  1.0
  Fe  Fe13  1  0.825  0.825  0.175  1.0
  Si  Si14  1  0.500  0.000  0.750  1.0
  Si  Si15  1  0.000  0.750  0.500  1.0
  Si  Si16  1  0.000  0.250  0.500  1.0
  Si  Si17  1  0.500  0.000  0.250  1.0
  Si  Si18  1  0.250  0.500  0.000  1.0
  Si  Si19  1  0.750  0.500  0.000  1.0
  Se  Se20  1  0.000  0.000  0.000  1.0
  Se  Se21  1  0.500  0.500  0.500  1.0
  O  O22  1  0.356  0.360  0.914  1.0
  O  O23  1  0.856  0.414  0.860  1.0
  O  O24  1  0.360  0.086  0.644  1.0
  O  O25  1  0.640  0.086  0.356  1.0
  O  O26  1  0.640  0.914  0.644  1.0
  O  O27  1  0.086  0.644  0.360  1.0
  O  O28  1  0.860  0.144  0.586  1.0
  O  O29  1  0.856  0.586  0.140  1.0
  O  O30  1  0.086  0.356  0.640  1.0
  O  O31  1  0.144  0.586  0.860  1.0
  O  O32  1  0.586  0.140  0.856  1.0
  O  O33  1  0.644  0.640  0.914  1.0
  O  O34  1  0.914  0.356  0.360  1.0
  O  O35  1  0.356  0.640  0.086  1.0
  O  O36  1  0.414  0.140  0.144  1.0
  O  O37  1  0.140  0.856  0.586  1.0
  O  O38  1  0.644  0.360  0.086  1.0
  O  O39  1  0.140  0.144  0.414  1.0
  O  O40  1  0.586  0.860  0.144  1.0
  O  O41  1  0.144  0.414  0.140  1.0
  O  O42  1  0.414  0.860  0.856  1.0
  O  O43  1  0.914  0.644  0.640  1.0
  O  O44  1  0.860  0.856  0.414  1.0
  O  O45  1  0.360  0.914  0.356  1.0
[/CIF]
.