The structure described by BeF2 is Low Tridymite-like structured and crystallizes in the trigonal R-3m space group. Be(1) is bonded to one F(1), one F(2), one F(3), and one F(4) atom to form corner-sharing BeF4 tetrahedra. There are four inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to two equivalent Be(1) atoms. In the second F site, F(2) is bonded in a bent 150 degrees geometry to two equivalent Be(1) atoms. In the third F site, F(3) is bonded in a bent 150 degrees geometry to two equivalent Be(1) atoms. In the fourth F site, F(4) is bonded in a bent 150 degrees geometry to two equivalent Be(1) atoms. is represented by the CIF card [CIF]
data_BeF2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.933
_cell_length_b   8.933
_cell_length_c   8.933
_cell_angle_alpha   93.996
_cell_angle_beta   93.996
_cell_angle_gamma   93.996
_symmetry_Int_Tables_number   1
_cell_volume   707.365
_cell_formula_units_Z   12
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  0.127  0.667  0.897  1.0
  Be  Be1  1  0.333  0.873  0.103  1.0
  Be  Be2  1  0.897  0.127  0.667  1.0
  Be  Be3  1  0.333  0.103  0.873  1.0
  Be  Be4  1  0.667  0.127  0.897  1.0
  Be  Be5  1  0.103  0.333  0.873  1.0
  Be  Be6  1  0.667  0.897  0.127  1.0
  Be  Be7  1  0.873  0.103  0.333  1.0
  Be  Be8  1  0.897  0.667  0.127  1.0
  Be  Be9  1  0.873  0.333  0.103  1.0
  Be  Be10  1  0.127  0.897  0.667  1.0
  Be  Be11  1  0.103  0.873  0.333  1.0
  F  F12  1  0.018  0.018  0.319  1.0
  F  F13  1  0.753  0.753  0.112  1.0
  F  F14  1  0.853  0.500  0.147  1.0
  F  F15  1  0.735  0.000  0.265  1.0
  F  F16  1  0.147  0.853  0.500  1.0
  F  F17  1  0.265  0.000  0.735  1.0
  F  F18  1  0.247  0.247  0.888  1.0
  F  F19  1  0.681  0.982  0.982  1.0
  F  F20  1  0.247  0.888  0.247  1.0
  F  F21  1  0.853  0.147  0.500  1.0
  F  F22  1  0.982  0.982  0.681  1.0
  F  F23  1  0.500  0.147  0.853  1.0
  F  F24  1  0.000  0.735  0.265  1.0
  F  F25  1  0.265  0.735  0.000  1.0
  F  F26  1  0.888  0.247  0.247  1.0
  F  F27  1  0.319  0.018  0.018  1.0
  F  F28  1  0.735  0.265  0.000  1.0
  F  F29  1  0.753  0.112  0.753  1.0
  F  F30  1  0.000  0.265  0.735  1.0
  F  F31  1  0.500  0.853  0.147  1.0
  F  F32  1  0.018  0.319  0.018  1.0
  F  F33  1  0.112  0.753  0.753  1.0
  F  F34  1  0.982  0.681  0.982  1.0
  F  F35  1  0.147  0.500  0.853  1.0
[/CIF]
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The structure described by BeF2 is Low Tridymite-like structured and crystallizes in the trigonal R-3m space group. Be(1) is bonded to one F(1), one F(2), one F(3), and one F(4) atom to form corner-sharing BeF4 tetrahedra. There are four inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to two equivalent Be(1) atoms. In the second F site, F(2) is bonded in a bent 150 degrees geometry to two equivalent Be(1) atoms. In the third F site, F(3) is bonded in a bent 150 degrees geometry to two equivalent Be(1) atoms. In the fourth F site, F(4) is bonded in a bent 150 degrees geometry to two equivalent Be(1) atoms. is represented by the CIF card [CIF]
data_BeF2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.933
_cell_length_b   8.933
_cell_length_c   8.933
_cell_angle_alpha   93.996
_cell_angle_beta   93.996
_cell_angle_gamma   93.996
_symmetry_Int_Tables_number   1
_cell_volume   707.365
_cell_formula_units_Z   12
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  0.127  0.667  0.897  1.0
  Be  Be1  1  0.333  0.873  0.103  1.0
  Be  Be2  1  0.897  0.127  0.667  1.0
  Be  Be3  1  0.333  0.103  0.873  1.0
  Be  Be4  1  0.667  0.127  0.897  1.0
  Be  Be5  1  0.103  0.333  0.873  1.0
  Be  Be6  1  0.667  0.897  0.127  1.0
  Be  Be7  1  0.873  0.103  0.333  1.0
  Be  Be8  1  0.897  0.667  0.127  1.0
  Be  Be9  1  0.873  0.333  0.103  1.0
  Be  Be10  1  0.127  0.897  0.667  1.0
  Be  Be11  1  0.103  0.873  0.333  1.0
  F  F12  1  0.018  0.018  0.319  1.0
  F  F13  1  0.753  0.753  0.112  1.0
  F  F14  1  0.853  0.500  0.147  1.0
  F  F15  1  0.735  0.000  0.265  1.0
  F  F16  1  0.147  0.853  0.500  1.0
  F  F17  1  0.265  0.000  0.735  1.0
  F  F18  1  0.247  0.247  0.888  1.0
  F  F19  1  0.681  0.982  0.982  1.0
  F  F20  1  0.247  0.888  0.247  1.0
  F  F21  1  0.853  0.147  0.500  1.0
  F  F22  1  0.982  0.982  0.681  1.0
  F  F23  1  0.500  0.147  0.853  1.0
  F  F24  1  0.000  0.735  0.265  1.0
  F  F25  1  0.265  0.735  0.000  1.0
  F  F26  1  0.888  0.247  0.247  1.0
  F  F27  1  0.319  0.018  0.018  1.0
  F  F28  1  0.735  0.265  0.000  1.0
  F  F29  1  0.753  0.112  0.753  1.0
  F  F30  1  0.000  0.265  0.735  1.0
  F  F31  1  0.500  0.853  0.147  1.0
  F  F32  1  0.018  0.319  0.018  1.0
  F  F33  1  0.112  0.753  0.753  1.0
  F  F34  1  0.982  0.681  0.982  1.0
  F  F35  1  0.147  0.500  0.853  1.0
[/CIF]
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