The crystal structure described by Rb2BeF4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to two equivalent F(3), three equivalent F(2), and four equivalent F(1) atoms. In the second Rb site, Rb(2) is bonded in a 11-coordinate geometry to two equivalent F(2), three equivalent F(3), and six equivalent F(1) atoms. Be(1) is bonded in a tetrahedral geometry to one F(2), one F(3), and two equivalent F(1) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to two equivalent Rb(1), three equivalent Rb(2), and one Be(1) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to two equivalent Rb(2), three equivalent Rb(1), and one Be(1) atom. In the third F site, F(3) is bonded in a distorted single-bond geometry to two equivalent Rb(1), three equivalent Rb(2), and one Be(1) atom. is represented by the CIF file [CIF]
data_Rb2BeF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.832
_cell_length_b   7.655
_cell_length_c   10.160
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   453.584
_cell_formula_units_Z   4
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
  Rb  Rb0  1  0.750  0.985  0.311  1.0
  Rb  Rb1  1  0.250  0.015  0.689  1.0
  Rb  Rb2  1  0.250  0.515  0.811  1.0
  Rb  Rb3  1  0.750  0.485  0.189  1.0
  Rb  Rb4  1  0.750  0.660  0.595  1.0
  Rb  Rb5  1  0.250  0.340  0.405  1.0
  Rb  Rb6  1  0.250  0.840  0.095  1.0
  Rb  Rb7  1  0.750  0.160  0.905  1.0
  Be  Be8  1  0.250  0.262  0.082  1.0
  Be  Be9  1  0.750  0.238  0.582  1.0
  Be  Be10  1  0.250  0.762  0.418  1.0
  Be  Be11  1  0.750  0.738  0.918  1.0
  F  F12  1  0.968  0.311  0.652  1.0
  F  F13  1  0.468  0.689  0.348  1.0
  F  F14  1  0.468  0.189  0.152  1.0
  F  F15  1  0.968  0.811  0.848  1.0
  F  F16  1  0.532  0.811  0.848  1.0
  F  F17  1  0.532  0.311  0.652  1.0
  F  F18  1  0.032  0.189  0.152  1.0
  F  F19  1  0.032  0.689  0.348  1.0
  F  F20  1  0.750  0.536  0.911  1.0
  F  F21  1  0.250  0.464  0.089  1.0
  F  F22  1  0.250  0.964  0.411  1.0
  F  F23  1  0.750  0.036  0.589  1.0
  F  F24  1  0.750  0.807  0.063  1.0
  F  F25  1  0.250  0.193  0.937  1.0
  F  F26  1  0.250  0.693  0.563  1.0
  F  F27  1  0.750  0.307  0.437  1.0
[/CIF]
.
The crystal structure described by Rb2BeF4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to two equivalent F(3), three equivalent F(2), and four equivalent F(1) atoms. In the second Rb site, Rb(2) is bonded in a 11-coordinate geometry to two equivalent F(2), three equivalent F(3), and six equivalent F(1) atoms. Be(1) is bonded in a tetrahedral geometry to one F(2), one F(3), and two equivalent F(1) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to two equivalent Rb(1), three equivalent Rb(2), and one Be(1) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to two equivalent Rb(2), three equivalent Rb(1), and one Be(1) atom. In the third F site, F(3) is bonded in a distorted single-bond geometry to two equivalent Rb(1), three equivalent Rb(2), and one Be(1) atom. is represented by the CIF file [CIF]
data_Rb2BeF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.832
_cell_length_b   7.655
_cell_length_c   10.160
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   453.584
_cell_formula_units_Z   4
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
  Rb  Rb0  1  0.750  0.985  0.311  1.0
  Rb  Rb1  1  0.250  0.015  0.689  1.0
  Rb  Rb2  1  0.250  0.515  0.811  1.0
  Rb  Rb3  1  0.750  0.485  0.189  1.0
  Rb  Rb4  1  0.750  0.660  0.595  1.0
  Rb  Rb5  1  0.250  0.340  0.405  1.0
  Rb  Rb6  1  0.250  0.840  0.095  1.0
  Rb  Rb7  1  0.750  0.160  0.905  1.0
  Be  Be8  1  0.250  0.262  0.082  1.0
  Be  Be9  1  0.750  0.238  0.582  1.0
  Be  Be10  1  0.250  0.762  0.418  1.0
  Be  Be11  1  0.750  0.738  0.918  1.0
  F  F12  1  0.968  0.311  0.652  1.0
  F  F13  1  0.468  0.689  0.348  1.0
  F  F14  1  0.468  0.189  0.152  1.0
  F  F15  1  0.968  0.811  0.848  1.0
  F  F16  1  0.532  0.811  0.848  1.0
  F  F17  1  0.532  0.311  0.652  1.0
  F  F18  1  0.032  0.189  0.152  1.0
  F  F19  1  0.032  0.689  0.348  1.0
  F  F20  1  0.750  0.536  0.911  1.0
  F  F21  1  0.250  0.464  0.089  1.0
  F  F22  1  0.250  0.964  0.411  1.0
  F  F23  1  0.750  0.036  0.589  1.0
  F  F24  1  0.750  0.807  0.063  1.0
  F  F25  1  0.250  0.193  0.937  1.0
  F  F26  1  0.250  0.693  0.563  1.0
  F  F27  1  0.750  0.307  0.437  1.0
[/CIF]
.