The material described by Sn3As4 crystallizes in the cubic P-43m space group. Sn(1) is bonded to four equivalent As(1) atoms to form corner-sharing SnAs4 tetrahedra. As(1) is bonded in a trigonal non-coplanar geometry to three equivalent Sn(1) atoms. is represented by the CIF file [CIF]
data_Sn3As4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.819
_cell_length_b   5.819
_cell_length_c   5.819
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   197.056
_cell_formula_units_Z   1
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
  Sn  Sn0  1  0.000  0.000  0.000  1.0
  Sn  Sn1  1  0.500  0.000  0.500  1.0
  Sn  Sn2  1  0.000  0.500  0.500  1.0
  As  As3  1  0.284  0.716  0.784  1.0
  As  As4  1  0.716  0.284  0.784  1.0
  As  As5  1  0.284  0.284  0.216  1.0
  As  As6  1  0.716  0.716  0.216  1.0
[/CIF]
.
The material described by Sn3As4 crystallizes in the cubic P-43m space group. Sn(1) is bonded to four equivalent As(1) atoms to form corner-sharing SnAs4 tetrahedra. As(1) is bonded in a trigonal non-coplanar geometry to three equivalent Sn(1) atoms. is represented by the CIF file [CIF]
data_Sn3As4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.819
_cell_length_b   5.819
_cell_length_c   5.819
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   197.056
_cell_formula_units_Z   1
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
  Sn  Sn0  1  0.000  0.000  0.000  1.0
  Sn  Sn1  1  0.500  0.000  0.500  1.0
  Sn  Sn2  1  0.000  0.500  0.500  1.0
  As  As3  1  0.284  0.716  0.784  1.0
  As  As4  1  0.716  0.284  0.784  1.0
  As  As5  1  0.284  0.284  0.216  1.0
  As  As6  1  0.716  0.716  0.216  1.0
[/CIF]
.