The material described by Na4Eu2SnAs4 is alpha Pu-derived structured and crystallizes in the monoclinic Cc space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 3-coordinate geometry to one As(1), one As(2), one As(3), and two equivalent As(4) atoms. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one As(1), one As(4), and two equivalent As(3) atoms. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one As(1), one As(4), and two equivalent As(2) atoms. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one As(1), one As(2), one As(3), and one As(4) atom. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 3-coordinate geometry to one As(1), one As(2), one As(3), and two equivalent As(4) atoms. In the second Eu site, Eu(2) is bonded in a 3-coordinate geometry to one As(1), two equivalent As(2), and two equivalent As(3) atoms. Sn(1) is bonded in a 4-coordinate geometry to one As(1), one As(2), one As(3), and one As(4) atom. There are four inequivalent As sites. In the first As site, As(4) is bonded in a 8-coordinate geometry to one Na(2), one Na(3), one Na(4), two equivalent Na(1), two equivalent Eu(1), and one Sn(1) atom. In the second As site, As(1) is bonded in a 7-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(4), one Eu(1), one Eu(2), and one Sn(1) atom. In the third As site, As(2) is bonded in a 8-coordinate geometry to one Na(1), one Na(4), two equivalent Na(3), one Eu(1), two equivalent Eu(2), and one Sn(1) atom. In the fourth As site, As(3) is bonded in a 8-coordinate geometry to one Na(1), one Na(4), two equivalent Na(2), one Eu(1), two equivalent Eu(2), and one Sn(1) atom. is represented by the CIF file [CIF]
data_Na4Eu2SnAs4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.798
_cell_length_b   9.798
_cell_length_c   7.393
_cell_angle_alpha   89.474
_cell_angle_beta   89.474
_cell_angle_gamma   119.910
_symmetry_Int_Tables_number   1
_cell_volume   615.072
_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  0.054  0.526  0.621  1.0
  Na  Na1  1  0.526  0.054  0.121  1.0
  Na  Na2  1  0.288  0.142  0.804  1.0
  Na  Na3  1  0.860  0.708  0.791  1.0
  Na  Na4  1  0.859  0.150  0.796  1.0
  Na  Na5  1  0.708  0.860  0.291  1.0
  Na  Na6  1  0.142  0.288  0.304  1.0
  Na  Na7  1  0.150  0.859  0.296  1.0
  Eu  Eu8  1  0.472  0.948  0.621  1.0
  Eu  Eu9  1  0.470  0.521  0.624  1.0
  Eu  Eu10  1  0.948  0.472  0.121  1.0
  Eu  Eu11  1  0.521  0.470  0.124  1.0
  Sn  Sn12  1  0.672  0.336  0.498  1.0
  Sn  Sn13  1  0.336  0.672  0.998  1.0
  As  As14  1  0.664  0.336  0.859  1.0
  As  As15  1  0.336  0.664  0.359  1.0
  As  As16  1  0.629  0.810  0.879  1.0
  As  As17  1  0.189  0.373  0.900  1.0
  As  As18  1  0.183  0.812  0.891  1.0
  As  As19  1  0.373  0.189  0.400  1.0
  As  As20  1  0.810  0.629  0.379  1.0
  As  As21  1  0.812  0.183  0.391  1.0
[/CIF]
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The material described by Na4Eu2SnAs4 is alpha Pu-derived structured and crystallizes in the monoclinic Cc space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 3-coordinate geometry to one As(1), one As(2), one As(3), and two equivalent As(4) atoms. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one As(1), one As(4), and two equivalent As(3) atoms. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one As(1), one As(4), and two equivalent As(2) atoms. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one As(1), one As(2), one As(3), and one As(4) atom. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 3-coordinate geometry to one As(1), one As(2), one As(3), and two equivalent As(4) atoms. In the second Eu site, Eu(2) is bonded in a 3-coordinate geometry to one As(1), two equivalent As(2), and two equivalent As(3) atoms. Sn(1) is bonded in a 4-coordinate geometry to one As(1), one As(2), one As(3), and one As(4) atom. There are four inequivalent As sites. In the first As site, As(4) is bonded in a 8-coordinate geometry to one Na(2), one Na(3), one Na(4), two equivalent Na(1), two equivalent Eu(1), and one Sn(1) atom. In the second As site, As(1) is bonded in a 7-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(4), one Eu(1), one Eu(2), and one Sn(1) atom. In the third As site, As(2) is bonded in a 8-coordinate geometry to one Na(1), one Na(4), two equivalent Na(3), one Eu(1), two equivalent Eu(2), and one Sn(1) atom. In the fourth As site, As(3) is bonded in a 8-coordinate geometry to one Na(1), one Na(4), two equivalent Na(2), one Eu(1), two equivalent Eu(2), and one Sn(1) atom. is represented by the CIF file [CIF]
data_Na4Eu2SnAs4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.798
_cell_length_b   9.798
_cell_length_c   7.393
_cell_angle_alpha   89.474
_cell_angle_beta   89.474
_cell_angle_gamma   119.910
_symmetry_Int_Tables_number   1
_cell_volume   615.072
_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  0.054  0.526  0.621  1.0
  Na  Na1  1  0.526  0.054  0.121  1.0
  Na  Na2  1  0.288  0.142  0.804  1.0
  Na  Na3  1  0.860  0.708  0.791  1.0
  Na  Na4  1  0.859  0.150  0.796  1.0
  Na  Na5  1  0.708  0.860  0.291  1.0
  Na  Na6  1  0.142  0.288  0.304  1.0
  Na  Na7  1  0.150  0.859  0.296  1.0
  Eu  Eu8  1  0.472  0.948  0.621  1.0
  Eu  Eu9  1  0.470  0.521  0.624  1.0
  Eu  Eu10  1  0.948  0.472  0.121  1.0
  Eu  Eu11  1  0.521  0.470  0.124  1.0
  Sn  Sn12  1  0.672  0.336  0.498  1.0
  Sn  Sn13  1  0.336  0.672  0.998  1.0
  As  As14  1  0.664  0.336  0.859  1.0
  As  As15  1  0.336  0.664  0.359  1.0
  As  As16  1  0.629  0.810  0.879  1.0
  As  As17  1  0.189  0.373  0.900  1.0
  As  As18  1  0.183  0.812  0.891  1.0
  As  As19  1  0.373  0.189  0.400  1.0
  As  As20  1  0.810  0.629  0.379  1.0
  As  As21  1  0.812  0.183  0.391  1.0
[/CIF]
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