The structure described by CdSnAs2 crystallizes in the monoclinic Cm space group. There are six inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one As(7) and three equivalent As(8) atoms to form corner-sharing CdAs4 tetrahedra. In the second Cd site, Cd(2) is bonded to one As(6) and three equivalent As(7) atoms to form CdAs4 trigonal pyramids that share corners with three equivalent Cd(1)As4 tetrahedra, corners with three equivalent Sn(6)As4 tetrahedra, and corners with six equivalent Cd(2)As4 trigonal pyramids. In the third Cd site, Cd(3) is bonded to one As(9) and three equivalent As(10) atoms to form corner-sharing CdAs4 tetrahedra. In the fourth Cd site, Cd(4) is bonded to one As(8) and three equivalent As(9) atoms to form corner-sharing CdAs4 tetrahedra. In the fifth Cd site, Cd(5) is bonded to one As(10) and three equivalent As(11) atoms to form corner-sharing CdAs4 tetrahedra. In the sixth Cd site, Cd(6) is bonded to one As(11) and three equivalent As(12) atoms to form CdAs4 tetrahedra that share corners with three equivalent Cd(5)As4 tetrahedra, corners with three equivalent Sn(1)As4 tetrahedra, and corners with six equivalent Cd(6)As4 tetrahedra. There are six inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one As(12) and three equivalent As(1) atoms to form SnAs4 tetrahedra that share corners with three equivalent Cd(6)As4 tetrahedra, corners with three equivalent Sn(2)As4 tetrahedra, and corners with six equivalent Sn(1)As4 tetrahedra. In the second Sn site, Sn(2) is bonded to one As(1) and three equivalent As(2) atoms to form corner-sharing SnAs4 tetrahedra. In the third Sn site, Sn(3) is bonded to one As(2) and three equivalent As(3) atoms to form corner-sharing SnAs4 tetrahedra. In the fourth Sn site, Sn(4) is bonded to one As(3) and three equivalent As(4) atoms to form corner-sharing SnAs4 tetrahedra. In the fifth Sn site, Sn(5) is bonded to one As(4) and three equivalent As(5) atoms to form corner-sharing SnAs4 tetrahedra. In the sixth Sn site, Sn(6) is bonded to one As(5) and three equivalent As(6) atoms to form SnAs4 tetrahedra that share corners with three equivalent Sn(5)As4 tetrahedra, corners with six equivalent Sn(6)As4 tetrahedra, and corners with three equivalent Cd(2)As4 trigonal pyramids. There are twelve inequivalent As sites. In the first As site, As(1) is bonded to one Sn(2) and three equivalent Sn(1) atoms to form AsSn4 tetrahedra that share corners with three equivalent As(12)Cd3Sn tetrahedra, corners with three equivalent As(2)Sn4 tetrahedra, and corners with six equivalent As(1)Sn4 tetrahedra. In the second As site, As(2) is bonded to one Sn(3) and three equivalent Sn(2) atoms to form corner-sharing AsSn4 tetrahedra. In the third As site, As(3) is bonded to one Sn(4) and three equivalent Sn(3) atoms to form corner-sharing AsSn4 tetrahedra. In the fourth As site, As(4) is bonded to one Sn(5) and three equivalent Sn(4) atoms to form corner-sharing AsSn4 tetrahedra. In the fifth As site, As(5) is bonded to one Sn(6) and three equivalent Sn(5) atoms to form AsSn4 tetrahedra that share corners with three equivalent As(6)CdSn3 tetrahedra, corners with three equivalent As(4)Sn4 tetrahedra, and corners with six equivalent As(5)Sn4 tetrahedra. In the sixth As site, As(6) is bonded to one Cd(2) and three equivalent Sn(6) atoms to form AsCdSn3 tetrahedra that share corners with three equivalent As(5)Sn4 tetrahedra, corners with six equivalent As(6)CdSn3 tetrahedra, and corners with three equivalent As(7)Cd4 trigonal pyramids. In the seventh As site, As(7) is bonded to one Cd(1) and three equivalent Cd(2) atoms to form AsCd4 trigonal pyramids that share corners with three equivalent As(8)Cd4 tetrahedra, corners with three equivalent As(6)CdSn3 tetrahedra, and corners with six equivalent As(7)Cd4 trigonal pyramids. In the eighth As site, As(8) is bonded to one Cd(4) and three equivalent Cd(1) atoms to form corner-sharing AsCd4 tetrahedra. In the ninth As site, As(9) is bonded to one Cd(3) and three equivalent Cd(4) atoms to form corner-sharing AsCd4 tetrahedra. In the tenth As site, As(10) is bonded to one Cd(5) and three equivalent Cd(3) atoms to form corner-sharing AsCd4 tetrahedra. In the eleventh As site, As(11) is bonded to one Cd(6) and three equivalent Cd(5) atoms to form AsCd4 tetrahedra that share corners with three equivalent As(12)Cd3Sn tetrahedra, corners with three equivalent As(10)Cd4 tetrahedra, and corners with six equivalent As(11)Cd4 tetrahedra. In the twelfth As site, As(12) is bonded to three equivalent Cd(6) and one Sn(1) atom to form AsCd3Sn tetrahedra that share corners with three equivalent As(11)Cd4 tetrahedra, corners with three equivalent As(1)Sn4 tetrahedra, and corners with six equivalent As(12)Cd3Sn tetrahedra. is represented by the CIF file [CIF]
data_CdSnAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.679
_cell_length_b   4.679
_cell_length_c   39.896
_cell_angle_alpha   89.456
_cell_angle_beta   89.456
_cell_angle_gamma   56.306
_symmetry_Int_Tables_number   1
_cell_volume   726.778
_cell_formula_units_Z   6
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
  Cd  Cd0  1  0.339  0.339  0.412  1.0
  Cd  Cd1  1  0.007  0.007  0.488  1.0
  Cd  Cd2  1  0.006  0.006  0.247  1.0
  Cd  Cd3  1  0.672  0.672  0.329  1.0
  Cd  Cd4  1  0.338  0.338  0.165  1.0
  Cd  Cd5  1  0.670  0.670  0.083  1.0
  Sn  Sn6  1  0.001  0.001  0.004  1.0
  Sn  Sn7  1  0.339  0.339  0.912  1.0
  Sn  Sn8  1  0.671  0.671  0.830  1.0
  Sn  Sn9  1  0.004  0.004  0.747  1.0
  Sn  Sn10  1  0.338  0.338  0.665  1.0
  Sn  Sn11  1  0.671  0.671  0.582  1.0
  As  As12  1  0.331  0.331  0.980  1.0
  As  As13  1  0.661  0.661  0.898  1.0
  As  As14  1  0.994  0.994  0.816  1.0
  As  As15  1  0.327  0.327  0.733  1.0
  As  As16  1  0.661  0.661  0.651  1.0
  As  As17  1  0.999  0.999  0.559  1.0
  As  As18  1  0.328  0.328  0.481  1.0
  As  As19  1  0.662  0.662  0.397  1.0
  As  As20  1  0.995  0.995  0.315  1.0
  As  As21  1  0.329  0.329  0.234  1.0
  As  As22  1  0.661  0.661  0.151  1.0
  As  As23  1  0.994  0.994  0.070  1.0
[/CIF]
.
The structure described by CdSnAs2 crystallizes in the monoclinic Cm space group. There are six inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one As(7) and three equivalent As(8) atoms to form corner-sharing CdAs4 tetrahedra. In the second Cd site, Cd(2) is bonded to one As(6) and three equivalent As(7) atoms to form CdAs4 trigonal pyramids that share corners with three equivalent Cd(1)As4 tetrahedra, corners with three equivalent Sn(6)As4 tetrahedra, and corners with six equivalent Cd(2)As4 trigonal pyramids. In the third Cd site, Cd(3) is bonded to one As(9) and three equivalent As(10) atoms to form corner-sharing CdAs4 tetrahedra. In the fourth Cd site, Cd(4) is bonded to one As(8) and three equivalent As(9) atoms to form corner-sharing CdAs4 tetrahedra. In the fifth Cd site, Cd(5) is bonded to one As(10) and three equivalent As(11) atoms to form corner-sharing CdAs4 tetrahedra. In the sixth Cd site, Cd(6) is bonded to one As(11) and three equivalent As(12) atoms to form CdAs4 tetrahedra that share corners with three equivalent Cd(5)As4 tetrahedra, corners with three equivalent Sn(1)As4 tetrahedra, and corners with six equivalent Cd(6)As4 tetrahedra. There are six inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one As(12) and three equivalent As(1) atoms to form SnAs4 tetrahedra that share corners with three equivalent Cd(6)As4 tetrahedra, corners with three equivalent Sn(2)As4 tetrahedra, and corners with six equivalent Sn(1)As4 tetrahedra. In the second Sn site, Sn(2) is bonded to one As(1) and three equivalent As(2) atoms to form corner-sharing SnAs4 tetrahedra. In the third Sn site, Sn(3) is bonded to one As(2) and three equivalent As(3) atoms to form corner-sharing SnAs4 tetrahedra. In the fourth Sn site, Sn(4) is bonded to one As(3) and three equivalent As(4) atoms to form corner-sharing SnAs4 tetrahedra. In the fifth Sn site, Sn(5) is bonded to one As(4) and three equivalent As(5) atoms to form corner-sharing SnAs4 tetrahedra. In the sixth Sn site, Sn(6) is bonded to one As(5) and three equivalent As(6) atoms to form SnAs4 tetrahedra that share corners with three equivalent Sn(5)As4 tetrahedra, corners with six equivalent Sn(6)As4 tetrahedra, and corners with three equivalent Cd(2)As4 trigonal pyramids. There are twelve inequivalent As sites. In the first As site, As(1) is bonded to one Sn(2) and three equivalent Sn(1) atoms to form AsSn4 tetrahedra that share corners with three equivalent As(12)Cd3Sn tetrahedra, corners with three equivalent As(2)Sn4 tetrahedra, and corners with six equivalent As(1)Sn4 tetrahedra. In the second As site, As(2) is bonded to one Sn(3) and three equivalent Sn(2) atoms to form corner-sharing AsSn4 tetrahedra. In the third As site, As(3) is bonded to one Sn(4) and three equivalent Sn(3) atoms to form corner-sharing AsSn4 tetrahedra. In the fourth As site, As(4) is bonded to one Sn(5) and three equivalent Sn(4) atoms to form corner-sharing AsSn4 tetrahedra. In the fifth As site, As(5) is bonded to one Sn(6) and three equivalent Sn(5) atoms to form AsSn4 tetrahedra that share corners with three equivalent As(6)CdSn3 tetrahedra, corners with three equivalent As(4)Sn4 tetrahedra, and corners with six equivalent As(5)Sn4 tetrahedra. In the sixth As site, As(6) is bonded to one Cd(2) and three equivalent Sn(6) atoms to form AsCdSn3 tetrahedra that share corners with three equivalent As(5)Sn4 tetrahedra, corners with six equivalent As(6)CdSn3 tetrahedra, and corners with three equivalent As(7)Cd4 trigonal pyramids. In the seventh As site, As(7) is bonded to one Cd(1) and three equivalent Cd(2) atoms to form AsCd4 trigonal pyramids that share corners with three equivalent As(8)Cd4 tetrahedra, corners with three equivalent As(6)CdSn3 tetrahedra, and corners with six equivalent As(7)Cd4 trigonal pyramids. In the eighth As site, As(8) is bonded to one Cd(4) and three equivalent Cd(1) atoms to form corner-sharing AsCd4 tetrahedra. In the ninth As site, As(9) is bonded to one Cd(3) and three equivalent Cd(4) atoms to form corner-sharing AsCd4 tetrahedra. In the tenth As site, As(10) is bonded to one Cd(5) and three equivalent Cd(3) atoms to form corner-sharing AsCd4 tetrahedra. In the eleventh As site, As(11) is bonded to one Cd(6) and three equivalent Cd(5) atoms to form AsCd4 tetrahedra that share corners with three equivalent As(12)Cd3Sn tetrahedra, corners with three equivalent As(10)Cd4 tetrahedra, and corners with six equivalent As(11)Cd4 tetrahedra. In the twelfth As site, As(12) is bonded to three equivalent Cd(6) and one Sn(1) atom to form AsCd3Sn tetrahedra that share corners with three equivalent As(11)Cd4 tetrahedra, corners with three equivalent As(1)Sn4 tetrahedra, and corners with six equivalent As(12)Cd3Sn tetrahedra. is represented by the CIF file [CIF]
data_CdSnAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.679
_cell_length_b   4.679
_cell_length_c   39.896
_cell_angle_alpha   89.456
_cell_angle_beta   89.456
_cell_angle_gamma   56.306
_symmetry_Int_Tables_number   1
_cell_volume   726.778
_cell_formula_units_Z   6
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
  Cd  Cd0  1  0.339  0.339  0.412  1.0
  Cd  Cd1  1  0.007  0.007  0.488  1.0
  Cd  Cd2  1  0.006  0.006  0.247  1.0
  Cd  Cd3  1  0.672  0.672  0.329  1.0
  Cd  Cd4  1  0.338  0.338  0.165  1.0
  Cd  Cd5  1  0.670  0.670  0.083  1.0
  Sn  Sn6  1  0.001  0.001  0.004  1.0
  Sn  Sn7  1  0.339  0.339  0.912  1.0
  Sn  Sn8  1  0.671  0.671  0.830  1.0
  Sn  Sn9  1  0.004  0.004  0.747  1.0
  Sn  Sn10  1  0.338  0.338  0.665  1.0
  Sn  Sn11  1  0.671  0.671  0.582  1.0
  As  As12  1  0.331  0.331  0.980  1.0
  As  As13  1  0.661  0.661  0.898  1.0
  As  As14  1  0.994  0.994  0.816  1.0
  As  As15  1  0.327  0.327  0.733  1.0
  As  As16  1  0.661  0.661  0.651  1.0
  As  As17  1  0.999  0.999  0.559  1.0
  As  As18  1  0.328  0.328  0.481  1.0
  As  As19  1  0.662  0.662  0.397  1.0
  As  As20  1  0.995  0.995  0.315  1.0
  As  As21  1  0.329  0.329  0.234  1.0
  As  As22  1  0.661  0.661  0.151  1.0
  As  As23  1  0.994  0.994  0.070  1.0
[/CIF]
.