The material structure described by K3Na2SnAs3 crystallizes in the orthorhombic Cmce space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 1-coordinate geometry to one As(2) and four equivalent As(1) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to two equivalent As(1) and three equivalent As(2) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to two equivalent As(1) and two equivalent As(2) atoms. In the second Na site, Na(2) is bonded to four equivalent As(1) atoms to form distorted NaAs4 tetrahedra that share corners with two equivalent Sn(1)As4 tetrahedra,  an edgeedge with one Sn(1)As4 tetrahedra, and edges with two equivalent Na(2)As4 tetrahedra. Sn(1) is bonded to two equivalent As(1) and two equivalent As(2) atoms to form distorted SnAs4 tetrahedra that share corners with two equivalent Na(2)As4 tetrahedra,  an edgeedge with one Na(2)As4 tetrahedra, and  an edgeedge with one Sn(1)As4 tetrahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 9-coordinate geometry to one K(2), four equivalent K(1), one Na(1), two equivalent Na(2), and one Sn(1) atom. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent K(1), three equivalent K(2), two equivalent Na(1), and two equivalent Sn(1) atoms. is represented by the CIF file [CIF]
data_K3Na2SnAs3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.889
_cell_length_b   10.889
_cell_length_c   15.615
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   143.247
_symmetry_Int_Tables_number   1
_cell_volume   1107.815
_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
  K  K0  1  0.600  0.934  0.825  1.0
  K  K1  1  0.260  0.260  0.322  1.0
  K  K2  1  0.240  0.240  0.822  1.0
  K  K3  1  0.740  0.740  0.678  1.0
  K  K4  1  0.434  0.100  0.675  1.0
  K  K5  1  0.900  0.566  0.325  1.0
  K  K6  1  0.066  0.400  0.175  1.0
  K  K7  1  0.400  0.066  0.175  1.0
  K  K8  1  0.566  0.900  0.325  1.0
  K  K9  1  0.100  0.434  0.675  1.0
  K  K10  1  0.934  0.600  0.825  1.0
  K  K11  1  0.760  0.760  0.178  1.0
  Na  Na12  1  0.081  0.919  0.000  1.0
  Na  Na13  1  0.581  0.419  0.500  1.0
  Na  Na14  1  0.919  0.081  0.000  1.0
  Na  Na15  1  0.755  0.245  0.000  1.0
  Na  Na16  1  0.745  0.255  0.500  1.0
  Na  Na17  1  0.245  0.755  0.000  1.0
  Na  Na18  1  0.255  0.745  0.500  1.0
  Na  Na19  1  0.419  0.581  0.500  1.0
  Sn  Sn20  1  0.089  0.911  0.500  1.0
  Sn  Sn21  1  0.411  0.589  0.000  1.0
  Sn  Sn22  1  0.911  0.089  0.500  1.0
  Sn  Sn23  1  0.589  0.411  0.000  1.0
  As  As24  1  0.064  0.381  0.394  1.0
  As  As25  1  0.881  0.564  0.106  1.0
  As  As26  1  0.436  0.119  0.894  1.0
  As  As27  1  0.619  0.936  0.606  1.0
  As  As28  1  0.936  0.619  0.606  1.0
  As  As29  1  0.119  0.436  0.894  1.0
  As  As30  1  0.564  0.881  0.106  1.0
  As  As31  1  0.381  0.064  0.394  1.0
  As  As32  1  0.206  0.206  0.595  1.0
  As  As33  1  0.706  0.706  0.905  1.0
  As  As34  1  0.294  0.294  0.095  1.0
  As  As35  1  0.794  0.794  0.405  1.0
[/CIF]
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The material structure described by K3Na2SnAs3 crystallizes in the orthorhombic Cmce space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 1-coordinate geometry to one As(2) and four equivalent As(1) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to two equivalent As(1) and three equivalent As(2) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to two equivalent As(1) and two equivalent As(2) atoms. In the second Na site, Na(2) is bonded to four equivalent As(1) atoms to form distorted NaAs4 tetrahedra that share corners with two equivalent Sn(1)As4 tetrahedra,  an edgeedge with one Sn(1)As4 tetrahedra, and edges with two equivalent Na(2)As4 tetrahedra. Sn(1) is bonded to two equivalent As(1) and two equivalent As(2) atoms to form distorted SnAs4 tetrahedra that share corners with two equivalent Na(2)As4 tetrahedra,  an edgeedge with one Na(2)As4 tetrahedra, and  an edgeedge with one Sn(1)As4 tetrahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 9-coordinate geometry to one K(2), four equivalent K(1), one Na(1), two equivalent Na(2), and one Sn(1) atom. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent K(1), three equivalent K(2), two equivalent Na(1), and two equivalent Sn(1) atoms. is represented by the CIF file [CIF]
data_K3Na2SnAs3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.889
_cell_length_b   10.889
_cell_length_c   15.615
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   143.247
_symmetry_Int_Tables_number   1
_cell_volume   1107.815
_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
  K  K0  1  0.600  0.934  0.825  1.0
  K  K1  1  0.260  0.260  0.322  1.0
  K  K2  1  0.240  0.240  0.822  1.0
  K  K3  1  0.740  0.740  0.678  1.0
  K  K4  1  0.434  0.100  0.675  1.0
  K  K5  1  0.900  0.566  0.325  1.0
  K  K6  1  0.066  0.400  0.175  1.0
  K  K7  1  0.400  0.066  0.175  1.0
  K  K8  1  0.566  0.900  0.325  1.0
  K  K9  1  0.100  0.434  0.675  1.0
  K  K10  1  0.934  0.600  0.825  1.0
  K  K11  1  0.760  0.760  0.178  1.0
  Na  Na12  1  0.081  0.919  0.000  1.0
  Na  Na13  1  0.581  0.419  0.500  1.0
  Na  Na14  1  0.919  0.081  0.000  1.0
  Na  Na15  1  0.755  0.245  0.000  1.0
  Na  Na16  1  0.745  0.255  0.500  1.0
  Na  Na17  1  0.245  0.755  0.000  1.0
  Na  Na18  1  0.255  0.745  0.500  1.0
  Na  Na19  1  0.419  0.581  0.500  1.0
  Sn  Sn20  1  0.089  0.911  0.500  1.0
  Sn  Sn21  1  0.411  0.589  0.000  1.0
  Sn  Sn22  1  0.911  0.089  0.500  1.0
  Sn  Sn23  1  0.589  0.411  0.000  1.0
  As  As24  1  0.064  0.381  0.394  1.0
  As  As25  1  0.881  0.564  0.106  1.0
  As  As26  1  0.436  0.119  0.894  1.0
  As  As27  1  0.619  0.936  0.606  1.0
  As  As28  1  0.936  0.619  0.606  1.0
  As  As29  1  0.119  0.436  0.894  1.0
  As  As30  1  0.564  0.881  0.106  1.0
  As  As31  1  0.381  0.064  0.394  1.0
  As  As32  1  0.206  0.206  0.595  1.0
  As  As33  1  0.706  0.706  0.905  1.0
  As  As34  1  0.294  0.294  0.095  1.0
  As  As35  1  0.794  0.794  0.405  1.0
[/CIF]
.