The material structure described by Cs2NaAsO4 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 10-coordinate geometry to one O(3), three equivalent O(2), and six equivalent O(1) atoms. In the second Cs site, Cs(2) is bonded to one O(2), two equivalent O(1), and four equivalent O(3) atoms to form distorted CsO7 hexagonal pyramids that share corners with four equivalent Cs(2)O7 hexagonal pyramids,  a cornercorner with one As(1)O4 tetrahedra, edges with four equivalent Cs(2)O7 hexagonal pyramids, and edges with three equivalent As(1)O4 tetrahedra. Na(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. As(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form AsO4 tetrahedra that share  a cornercorner with one Cs(2)O7 hexagonal pyramid and edges with three equivalent Cs(2)O7 hexagonal pyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Cs(2), three equivalent Cs(1), two equivalent Na(1), and one As(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Cs(2), three equivalent Cs(1), one Na(1), and one As(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Cs(1), four equivalent Cs(2), and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cs2NaAsO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.278
_cell_length_b   6.179
_cell_length_c   8.419
_cell_angle_alpha   87.500
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   326.268
_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  0.250  0.161  0.814  1.0
  Cs  Cs1  1  0.750  0.839  0.186  1.0
  Cs  Cs2  1  0.250  0.704  0.509  1.0
  Cs  Cs3  1  0.750  0.296  0.491  1.0
  Na  Na4  1  0.750  0.361  0.976  1.0
  Na  Na5  1  0.250  0.639  0.024  1.0
  As  As6  1  0.250  0.212  0.240  1.0
  As  As7  1  0.750  0.788  0.760  1.0
  O  O8  1  0.972  0.648  0.834  1.0
  O  O9  1  0.472  0.352  0.166  1.0
  O  O10  1  0.028  0.352  0.166  1.0
  O  O11  1  0.528  0.648  0.834  1.0
  O  O12  1  0.750  0.050  0.826  1.0
  O  O13  1  0.750  0.793  0.555  1.0
  O  O14  1  0.250  0.950  0.174  1.0
  O  O15  1  0.250  0.207  0.445  1.0
[/CIF]
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The material structure described by Cs2NaAsO4 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 10-coordinate geometry to one O(3), three equivalent O(2), and six equivalent O(1) atoms. In the second Cs site, Cs(2) is bonded to one O(2), two equivalent O(1), and four equivalent O(3) atoms to form distorted CsO7 hexagonal pyramids that share corners with four equivalent Cs(2)O7 hexagonal pyramids,  a cornercorner with one As(1)O4 tetrahedra, edges with four equivalent Cs(2)O7 hexagonal pyramids, and edges with three equivalent As(1)O4 tetrahedra. Na(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. As(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form AsO4 tetrahedra that share  a cornercorner with one Cs(2)O7 hexagonal pyramid and edges with three equivalent Cs(2)O7 hexagonal pyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Cs(2), three equivalent Cs(1), two equivalent Na(1), and one As(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Cs(2), three equivalent Cs(1), one Na(1), and one As(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Cs(1), four equivalent Cs(2), and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cs2NaAsO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.278
_cell_length_b   6.179
_cell_length_c   8.419
_cell_angle_alpha   87.500
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   326.268
_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  0.250  0.161  0.814  1.0
  Cs  Cs1  1  0.750  0.839  0.186  1.0
  Cs  Cs2  1  0.250  0.704  0.509  1.0
  Cs  Cs3  1  0.750  0.296  0.491  1.0
  Na  Na4  1  0.750  0.361  0.976  1.0
  Na  Na5  1  0.250  0.639  0.024  1.0
  As  As6  1  0.250  0.212  0.240  1.0
  As  As7  1  0.750  0.788  0.760  1.0
  O  O8  1  0.972  0.648  0.834  1.0
  O  O9  1  0.472  0.352  0.166  1.0
  O  O10  1  0.028  0.352  0.166  1.0
  O  O11  1  0.528  0.648  0.834  1.0
  O  O12  1  0.750  0.050  0.826  1.0
  O  O13  1  0.750  0.793  0.555  1.0
  O  O14  1  0.250  0.950  0.174  1.0
  O  O15  1  0.250  0.207  0.445  1.0
[/CIF]
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