The compound described by CsAsF4 crystallizes in the monoclinic P2_1 space group. Cs(1) is bonded in a 9-coordinate geometry to one F(2), two equivalent F(4), three equivalent F(1), and three equivalent F(3) atoms. As(1) is bonded in a rectangular see-saw-like geometry to one F(1), one F(2), one F(3), and one F(4) atom. There are four inequivalent F sites. In the first F site, F(1) is bonded to three equivalent Cs(1) and one As(1) atom to form a mixture of distorted corner and edge-sharing FCs3As tetrahedra. In the second F site, F(2) is bonded in a single-bond geometry to one Cs(1) and one As(1) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to three equivalent Cs(1) and one As(1) atom. In the fourth F site, F(4) is bonded in a single-bond geometry to two equivalent Cs(1) and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CsAsF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.759
_cell_length_b   6.596
_cell_length_c   8.437
_cell_angle_alpha   111.506
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   246.432
_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
  Cs  Cs0  1  0.698  0.100  0.783  1.0
  Cs  Cs1  1  0.198  0.900  0.217  1.0
  As  As2  1  0.191  0.541  0.689  1.0
  As  As3  1  0.691  0.459  0.311  1.0
  F  F4  1  0.204  0.843  0.836  1.0
  F  F5  1  0.704  0.157  0.164  1.0
  F  F6  1  0.562  0.545  0.716  1.0
  F  F7  1  0.062  0.455  0.284  1.0
  F  F8  1  0.724  0.769  0.415  1.0
  F  F9  1  0.224  0.231  0.585  1.0
  F  F10  1  0.619  0.509  0.123  1.0
  F  F11  1  0.119  0.491  0.877  1.0
[/CIF]
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The compound described by CsAsF4 crystallizes in the monoclinic P2_1 space group. Cs(1) is bonded in a 9-coordinate geometry to one F(2), two equivalent F(4), three equivalent F(1), and three equivalent F(3) atoms. As(1) is bonded in a rectangular see-saw-like geometry to one F(1), one F(2), one F(3), and one F(4) atom. There are four inequivalent F sites. In the first F site, F(1) is bonded to three equivalent Cs(1) and one As(1) atom to form a mixture of distorted corner and edge-sharing FCs3As tetrahedra. In the second F site, F(2) is bonded in a single-bond geometry to one Cs(1) and one As(1) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to three equivalent Cs(1) and one As(1) atom. In the fourth F site, F(4) is bonded in a single-bond geometry to two equivalent Cs(1) and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CsAsF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.759
_cell_length_b   6.596
_cell_length_c   8.437
_cell_angle_alpha   111.506
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   246.432
_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
  Cs  Cs0  1  0.698  0.100  0.783  1.0
  Cs  Cs1  1  0.198  0.900  0.217  1.0
  As  As2  1  0.191  0.541  0.689  1.0
  As  As3  1  0.691  0.459  0.311  1.0
  F  F4  1  0.204  0.843  0.836  1.0
  F  F5  1  0.704  0.157  0.164  1.0
  F  F6  1  0.562  0.545  0.716  1.0
  F  F7  1  0.062  0.455  0.284  1.0
  F  F8  1  0.724  0.769  0.415  1.0
  F  F9  1  0.224  0.231  0.585  1.0
  F  F10  1  0.619  0.509  0.123  1.0
  F  F11  1  0.119  0.491  0.877  1.0
[/CIF]
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