The material structure described by La4As2S5O4 crystallizes in the triclinic P1 space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 4-coordinate geometry to one S(5), two equivalent S(3), two equivalent S(4), one O(3), one O(4), and two equivalent O(1) atoms. In the second La site, La(2) is bonded in a 4-coordinate geometry to two equivalent S(3), two equivalent S(4), one O(3), one O(4), and two equivalent O(2) atoms. In the third La site, La(3) is bonded in a 4-coordinate geometry to one S(5), two equivalent S(1), two equivalent S(2), one O(1), one O(2), and two equivalent O(3) atoms. In the fourth La site, La(4) is bonded in a 4-coordinate geometry to two equivalent S(1), two equivalent S(2), one O(1), one O(2), and two equivalent O(4) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded to one S(2), one S(3), and two equivalent S(5) atoms to form corner-sharing AsS4 tetrahedra. In the second As site, As(2) is bonded in a distorted T-shaped geometry to one S(1), one S(4), and one S(5) atom. There are five inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to two equivalent La(3), two equivalent La(4), and one As(2) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to two equivalent La(3), two equivalent La(4), and one As(1) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent La(1), two equivalent La(2), and one As(1) atom. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to two equivalent La(1), two equivalent La(2), and one As(2) atom. In the fifth S site, S(5) is bonded to one La(1), one La(3), one As(2), and two equivalent As(1) atoms to form distorted SLa2As3 trigonal bipyramids that share  a cornercorner with one O(2)La4 tetrahedra,  a cornercorner with one O(4)La4 tetrahedra, corners with three equivalent O(1)La4 tetrahedra, corners with three equivalent O(3)La4 tetrahedra, and corners with two equivalent S(5)La2As3 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded to one La(3), one La(4), and two equivalent La(1) atoms to form OLa4 tetrahedra that share corners with two equivalent O(1)La4 tetrahedra, corners with two equivalent O(2)La4 tetrahedra, corners with three equivalent S(5)La2As3 trigonal bipyramids, edges with two equivalent O(3)La4 tetrahedra, and edges with two equivalent O(4)La4 tetrahedra. In the second O site, O(2) is bonded to one La(3), one La(4), and two equivalent La(2) atoms to form OLa4 tetrahedra that share corners with two equivalent O(1)La4 tetrahedra, corners with two equivalent O(2)La4 tetrahedra,  a cornercorner with one S(5)La2As3 trigonal bipyramid, edges with two equivalent O(3)La4 tetrahedra, and edges with two equivalent O(4)La4 tetrahedra. In the third O site, O(3) is bonded to one La(1), one La(2), and two equivalent La(3) atoms to form OLa4 tetrahedra that share corners with two equivalent O(3)La4 tetrahedra, corners with two equivalent O(4)La4 tetrahedra, corners with three equivalent S(5)La2As3 trigonal bipyramids, edges with two equivalent O(1)La4 tetrahedra, and edges with two equivalent O(2)La4 tetrahedra. In the fourth O site, O(4) is bonded to one La(1), one La(2), and two equivalent La(4) atoms to form OLa4 tetrahedra that share corners with two equivalent O(3)La4 tetrahedra, corners with two equivalent O(4)La4 tetrahedra,  a cornercorner with one S(5)La2As3 trigonal bipyramid, edges with two equivalent O(1)La4 tetrahedra, and edges with two equivalent O(2)La4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_La4As2S5O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.220
_cell_length_b   8.315
_cell_length_c   9.695
_cell_angle_alpha   101.990
_cell_angle_beta   102.113
_cell_angle_gamma   91.928
_symmetry_Int_Tables_number   1
_cell_volume   324.295
_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
  La  La0  1  0.184  0.589  0.370  1.0
  La  La1  1  0.191  0.092  0.372  1.0
  La  La2  1  0.814  0.406  0.632  1.0
  La  La3  1  0.819  0.905  0.627  1.0
  As  As4  1  0.490  0.360  1.000  1.0
  As  As5  1  0.760  0.792  0.000  1.0
  S  S6  1  0.376  0.708  0.790  1.0
  S  S7  1  0.441  0.171  0.789  1.0
  S  S8  1  0.652  0.278  0.211  1.0
  S  S9  1  0.585  0.813  0.210  1.0
  S  S10  1  0.954  0.532  1.000  1.0
  O  O11  1  0.754  0.622  0.499  1.0
  O  O12  1  0.757  0.126  0.501  1.0
  O  O13  1  0.256  0.376  0.504  1.0
  O  O14  1  0.255  0.872  0.496  1.0
[/CIF]
.
The material structure described by La4As2S5O4 crystallizes in the triclinic P1 space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 4-coordinate geometry to one S(5), two equivalent S(3), two equivalent S(4), one O(3), one O(4), and two equivalent O(1) atoms. In the second La site, La(2) is bonded in a 4-coordinate geometry to two equivalent S(3), two equivalent S(4), one O(3), one O(4), and two equivalent O(2) atoms. In the third La site, La(3) is bonded in a 4-coordinate geometry to one S(5), two equivalent S(1), two equivalent S(2), one O(1), one O(2), and two equivalent O(3) atoms. In the fourth La site, La(4) is bonded in a 4-coordinate geometry to two equivalent S(1), two equivalent S(2), one O(1), one O(2), and two equivalent O(4) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded to one S(2), one S(3), and two equivalent S(5) atoms to form corner-sharing AsS4 tetrahedra. In the second As site, As(2) is bonded in a distorted T-shaped geometry to one S(1), one S(4), and one S(5) atom. There are five inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to two equivalent La(3), two equivalent La(4), and one As(2) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to two equivalent La(3), two equivalent La(4), and one As(1) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent La(1), two equivalent La(2), and one As(1) atom. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to two equivalent La(1), two equivalent La(2), and one As(2) atom. In the fifth S site, S(5) is bonded to one La(1), one La(3), one As(2), and two equivalent As(1) atoms to form distorted SLa2As3 trigonal bipyramids that share  a cornercorner with one O(2)La4 tetrahedra,  a cornercorner with one O(4)La4 tetrahedra, corners with three equivalent O(1)La4 tetrahedra, corners with three equivalent O(3)La4 tetrahedra, and corners with two equivalent S(5)La2As3 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded to one La(3), one La(4), and two equivalent La(1) atoms to form OLa4 tetrahedra that share corners with two equivalent O(1)La4 tetrahedra, corners with two equivalent O(2)La4 tetrahedra, corners with three equivalent S(5)La2As3 trigonal bipyramids, edges with two equivalent O(3)La4 tetrahedra, and edges with two equivalent O(4)La4 tetrahedra. In the second O site, O(2) is bonded to one La(3), one La(4), and two equivalent La(2) atoms to form OLa4 tetrahedra that share corners with two equivalent O(1)La4 tetrahedra, corners with two equivalent O(2)La4 tetrahedra,  a cornercorner with one S(5)La2As3 trigonal bipyramid, edges with two equivalent O(3)La4 tetrahedra, and edges with two equivalent O(4)La4 tetrahedra. In the third O site, O(3) is bonded to one La(1), one La(2), and two equivalent La(3) atoms to form OLa4 tetrahedra that share corners with two equivalent O(3)La4 tetrahedra, corners with two equivalent O(4)La4 tetrahedra, corners with three equivalent S(5)La2As3 trigonal bipyramids, edges with two equivalent O(1)La4 tetrahedra, and edges with two equivalent O(2)La4 tetrahedra. In the fourth O site, O(4) is bonded to one La(1), one La(2), and two equivalent La(4) atoms to form OLa4 tetrahedra that share corners with two equivalent O(3)La4 tetrahedra, corners with two equivalent O(4)La4 tetrahedra,  a cornercorner with one S(5)La2As3 trigonal bipyramid, edges with two equivalent O(1)La4 tetrahedra, and edges with two equivalent O(2)La4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_La4As2S5O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.220
_cell_length_b   8.315
_cell_length_c   9.695
_cell_angle_alpha   101.990
_cell_angle_beta   102.113
_cell_angle_gamma   91.928
_symmetry_Int_Tables_number   1
_cell_volume   324.295
_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
  La  La0  1  0.184  0.589  0.370  1.0
  La  La1  1  0.191  0.092  0.372  1.0
  La  La2  1  0.814  0.406  0.632  1.0
  La  La3  1  0.819  0.905  0.627  1.0
  As  As4  1  0.490  0.360  1.000  1.0
  As  As5  1  0.760  0.792  0.000  1.0
  S  S6  1  0.376  0.708  0.790  1.0
  S  S7  1  0.441  0.171  0.789  1.0
  S  S8  1  0.652  0.278  0.211  1.0
  S  S9  1  0.585  0.813  0.210  1.0
  S  S10  1  0.954  0.532  1.000  1.0
  O  O11  1  0.754  0.622  0.499  1.0
  O  O12  1  0.757  0.126  0.501  1.0
  O  O13  1  0.256  0.376  0.504  1.0
  O  O14  1  0.255  0.872  0.496  1.0
[/CIF]
.