The crystal structure described by NaEuAsS4 crystallizes in the orthorhombic Ama2 space group. Na(1) is bonded to one S(3), two equivalent S(1), and two equivalent S(2) atoms to form distorted NaS5 trigonal bipyramids that share  a cornercorner with one As(1)S4 tetrahedra, corners with two equivalent Na(1)S5 trigonal bipyramids, and edges with two equivalent As(1)S4 tetrahedra. Eu(1) is bonded in a 8-coordinate geometry to two equivalent S(2), two equivalent S(3), and four equivalent S(1) atoms. As(1) is bonded to one S(2), one S(3), and two equivalent S(1) atoms to form AsS4 tetrahedra that share  a cornercorner with one Na(1)S5 trigonal bipyramid and edges with two equivalent Na(1)S5 trigonal bipyramids. There are three inequivalent S sites. In the first S site, S(1) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Eu(1), and one As(1) atom. In the second S site, S(2) is bonded to two equivalent Na(1), two equivalent Eu(1), and one As(1) atom to form distorted SNa2Eu2As trigonal bipyramids that share corners with four equivalent S(2)Na2Eu2As trigonal bipyramids, corners with three equivalent S(3)NaEu2As trigonal pyramids, and edges with two equivalent S(3)NaEu2As trigonal pyramids. In the third S site, S(3) is bonded to one Na(1), two equivalent Eu(1), and one As(1) atom to form SNaEu2As trigonal pyramids that share corners with three equivalent S(2)Na2Eu2As trigonal bipyramids, corners with two equivalent S(3)NaEu2As trigonal pyramids, and edges with two equivalent S(2)Na2Eu2As trigonal bipyramids. is represented by the CIF card [CIF]
data_NaEuAsS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.072
_cell_length_b   6.072
_cell_length_c   10.015
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   111.368
_symmetry_Int_Tables_number   1
_cell_volume   343.808
_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
  Na  Na0  1  0.407  0.778  0.750  1.0
  Na  Na1  1  0.778  0.407  0.250  1.0
  Eu  Eu2  1  0.038  0.038  0.000  1.0
  Eu  Eu3  1  0.038  0.038  0.500  1.0
  As  As4  1  0.350  0.780  0.250  1.0
  As  As5  1  0.780  0.350  0.750  1.0
  S  S6  1  0.168  0.598  0.068  1.0
  S  S7  1  0.598  0.168  0.932  1.0
  S  S8  1  0.168  0.598  0.432  1.0
  S  S9  1  0.598  0.168  0.568  1.0
  S  S10  1  0.741  0.868  0.250  1.0
  S  S11  1  0.868  0.741  0.750  1.0
  S  S12  1  0.128  0.305  0.750  1.0
  S  S13  1  0.305  0.128  0.250  1.0
[/CIF]
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The crystal structure described by NaEuAsS4 crystallizes in the orthorhombic Ama2 space group. Na(1) is bonded to one S(3), two equivalent S(1), and two equivalent S(2) atoms to form distorted NaS5 trigonal bipyramids that share  a cornercorner with one As(1)S4 tetrahedra, corners with two equivalent Na(1)S5 trigonal bipyramids, and edges with two equivalent As(1)S4 tetrahedra. Eu(1) is bonded in a 8-coordinate geometry to two equivalent S(2), two equivalent S(3), and four equivalent S(1) atoms. As(1) is bonded to one S(2), one S(3), and two equivalent S(1) atoms to form AsS4 tetrahedra that share  a cornercorner with one Na(1)S5 trigonal bipyramid and edges with two equivalent Na(1)S5 trigonal bipyramids. There are three inequivalent S sites. In the first S site, S(1) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Eu(1), and one As(1) atom. In the second S site, S(2) is bonded to two equivalent Na(1), two equivalent Eu(1), and one As(1) atom to form distorted SNa2Eu2As trigonal bipyramids that share corners with four equivalent S(2)Na2Eu2As trigonal bipyramids, corners with three equivalent S(3)NaEu2As trigonal pyramids, and edges with two equivalent S(3)NaEu2As trigonal pyramids. In the third S site, S(3) is bonded to one Na(1), two equivalent Eu(1), and one As(1) atom to form SNaEu2As trigonal pyramids that share corners with three equivalent S(2)Na2Eu2As trigonal bipyramids, corners with two equivalent S(3)NaEu2As trigonal pyramids, and edges with two equivalent S(2)Na2Eu2As trigonal bipyramids. is represented by the CIF card [CIF]
data_NaEuAsS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.072
_cell_length_b   6.072
_cell_length_c   10.015
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   111.368
_symmetry_Int_Tables_number   1
_cell_volume   343.808
_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
  Na  Na0  1  0.407  0.778  0.750  1.0
  Na  Na1  1  0.778  0.407  0.250  1.0
  Eu  Eu2  1  0.038  0.038  0.000  1.0
  Eu  Eu3  1  0.038  0.038  0.500  1.0
  As  As4  1  0.350  0.780  0.250  1.0
  As  As5  1  0.780  0.350  0.750  1.0
  S  S6  1  0.168  0.598  0.068  1.0
  S  S7  1  0.598  0.168  0.932  1.0
  S  S8  1  0.168  0.598  0.432  1.0
  S  S9  1  0.598  0.168  0.568  1.0
  S  S10  1  0.741  0.868  0.250  1.0
  S  S11  1  0.868  0.741  0.750  1.0
  S  S12  1  0.128  0.305  0.750  1.0
  S  S13  1  0.305  0.128  0.250  1.0
[/CIF]
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