The structure described by EuSn3Sb4 crystallizes in the orthorhombic Pnma space group. Eu(1) is bonded in a 9-coordinate geometry to one Sn(1), one Sb(3), two equivalent Sb(1), two equivalent Sb(2), and three equivalent Sb(4) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted rectangular see-saw-like geometry to one Eu(1), one Sb(3), and two equivalent Sb(1) atoms. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to one Sb(4) and two equivalent Sb(2) atoms. In the third Sn site, Sn(3) is bonded to one Sb(1), one Sb(2), and two equivalent Sb(3) atoms to form corner-sharing SnSb4 tetrahedra. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent Eu(1), one Sn(3), and two equivalent Sn(1) atoms to form distorted SbEu2Sn3 trigonal bipyramids that share corners with three equivalent Sb(2)Eu2Sn3 trigonal bipyramids, corners with two equivalent Sb(3)EuSn3 trigonal pyramids,  an edgeedge with one Sb(2)Eu2Sn3 trigonal bipyramid, edges with two equivalent Sb(1)Eu2Sn3 trigonal bipyramids, and edges with two equivalent Sb(3)EuSn3 trigonal pyramids. In the second Sb site, Sb(2) is bonded to two equivalent Eu(1), one Sn(3), and two equivalent Sn(2) atoms to form distorted SbEu2Sn3 trigonal bipyramids that share corners with three equivalent Sb(1)Eu2Sn3 trigonal bipyramids, corners with four equivalent Sb(3)EuSn3 trigonal pyramids,  an edgeedge with one Sb(1)Eu2Sn3 trigonal bipyramid, and edges with two equivalent Sb(2)Eu2Sn3 trigonal bipyramids. In the third Sb site, Sb(3) is bonded to one Eu(1), one Sn(1), and two equivalent Sn(3) atoms to form SbEuSn3 trigonal pyramids that share corners with two equivalent Sb(1)Eu2Sn3 trigonal bipyramids, corners with four equivalent Sb(2)Eu2Sn3 trigonal bipyramids, corners with two equivalent Sb(3)EuSn3 trigonal pyramids, and edges with two equivalent Sb(1)Eu2Sn3 trigonal bipyramids. In the fourth Sb site, Sb(4) is bonded in a 6-coordinate geometry to three equivalent Eu(1), one Sn(2), and two equivalent Sb(4) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_EuSn3Sb4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.464
_cell_length_b   10.058
_cell_length_c   22.944
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1030.191
_cell_formula_units_Z   4
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
  Eu  Eu0  1  0.250  0.061  0.871  1.0
  Eu  Eu1  1  0.250  0.561  0.629  1.0
  Eu  Eu2  1  0.750  0.939  0.129  1.0
  Eu  Eu3  1  0.750  0.439  0.371  1.0
  Sn  Sn4  1  0.250  0.279  0.750  1.0
  Sn  Sn5  1  0.250  0.779  0.750  1.0
  Sn  Sn6  1  0.750  0.721  0.250  1.0
  Sn  Sn7  1  0.750  0.221  0.250  1.0
  Sn  Sn8  1  0.250  0.351  0.988  1.0
  Sn  Sn9  1  0.250  0.851  0.512  1.0
  Sn  Sn10  1  0.750  0.649  0.012  1.0
  Sn  Sn11  1  0.750  0.149  0.488  1.0
  Sn  Sn12  1  0.250  0.454  0.150  1.0
  Sn  Sn13  1  0.250  0.954  0.350  1.0
  Sn  Sn14  1  0.750  0.546  0.850  1.0
  Sn  Sn15  1  0.750  0.046  0.650  1.0
  Sb  Sb16  1  0.250  0.031  0.230  1.0
  Sb  Sb17  1  0.250  0.531  0.270  1.0
  Sb  Sb18  1  0.750  0.969  0.770  1.0
  Sb  Sb19  1  0.750  0.469  0.730  1.0
  Sb  Sb20  1  0.250  0.208  0.406  1.0
  Sb  Sb21  1  0.250  0.708  0.094  1.0
  Sb  Sb22  1  0.750  0.792  0.594  1.0
  Sb  Sb23  1  0.750  0.292  0.906  1.0
  Sb  Sb24  1  0.250  0.216  0.623  1.0
  Sb  Sb25  1  0.250  0.716  0.877  1.0
  Sb  Sb26  1  0.750  0.784  0.377  1.0
  Sb  Sb27  1  0.750  0.284  0.123  1.0
  Sb  Sb28  1  0.250  0.570  0.470  1.0
  Sb  Sb29  1  0.250  0.070  0.030  1.0
  Sb  Sb30  1  0.750  0.430  0.530  1.0
  Sb  Sb31  1  0.750  0.930  0.970  1.0
[/CIF]
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The structure described by EuSn3Sb4 crystallizes in the orthorhombic Pnma space group. Eu(1) is bonded in a 9-coordinate geometry to one Sn(1), one Sb(3), two equivalent Sb(1), two equivalent Sb(2), and three equivalent Sb(4) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted rectangular see-saw-like geometry to one Eu(1), one Sb(3), and two equivalent Sb(1) atoms. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to one Sb(4) and two equivalent Sb(2) atoms. In the third Sn site, Sn(3) is bonded to one Sb(1), one Sb(2), and two equivalent Sb(3) atoms to form corner-sharing SnSb4 tetrahedra. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent Eu(1), one Sn(3), and two equivalent Sn(1) atoms to form distorted SbEu2Sn3 trigonal bipyramids that share corners with three equivalent Sb(2)Eu2Sn3 trigonal bipyramids, corners with two equivalent Sb(3)EuSn3 trigonal pyramids,  an edgeedge with one Sb(2)Eu2Sn3 trigonal bipyramid, edges with two equivalent Sb(1)Eu2Sn3 trigonal bipyramids, and edges with two equivalent Sb(3)EuSn3 trigonal pyramids. In the second Sb site, Sb(2) is bonded to two equivalent Eu(1), one Sn(3), and two equivalent Sn(2) atoms to form distorted SbEu2Sn3 trigonal bipyramids that share corners with three equivalent Sb(1)Eu2Sn3 trigonal bipyramids, corners with four equivalent Sb(3)EuSn3 trigonal pyramids,  an edgeedge with one Sb(1)Eu2Sn3 trigonal bipyramid, and edges with two equivalent Sb(2)Eu2Sn3 trigonal bipyramids. In the third Sb site, Sb(3) is bonded to one Eu(1), one Sn(1), and two equivalent Sn(3) atoms to form SbEuSn3 trigonal pyramids that share corners with two equivalent Sb(1)Eu2Sn3 trigonal bipyramids, corners with four equivalent Sb(2)Eu2Sn3 trigonal bipyramids, corners with two equivalent Sb(3)EuSn3 trigonal pyramids, and edges with two equivalent Sb(1)Eu2Sn3 trigonal bipyramids. In the fourth Sb site, Sb(4) is bonded in a 6-coordinate geometry to three equivalent Eu(1), one Sn(2), and two equivalent Sb(4) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_EuSn3Sb4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.464
_cell_length_b   10.058
_cell_length_c   22.944
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1030.191
_cell_formula_units_Z   4
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
  Eu  Eu0  1  0.250  0.061  0.871  1.0
  Eu  Eu1  1  0.250  0.561  0.629  1.0
  Eu  Eu2  1  0.750  0.939  0.129  1.0
  Eu  Eu3  1  0.750  0.439  0.371  1.0
  Sn  Sn4  1  0.250  0.279  0.750  1.0
  Sn  Sn5  1  0.250  0.779  0.750  1.0
  Sn  Sn6  1  0.750  0.721  0.250  1.0
  Sn  Sn7  1  0.750  0.221  0.250  1.0
  Sn  Sn8  1  0.250  0.351  0.988  1.0
  Sn  Sn9  1  0.250  0.851  0.512  1.0
  Sn  Sn10  1  0.750  0.649  0.012  1.0
  Sn  Sn11  1  0.750  0.149  0.488  1.0
  Sn  Sn12  1  0.250  0.454  0.150  1.0
  Sn  Sn13  1  0.250  0.954  0.350  1.0
  Sn  Sn14  1  0.750  0.546  0.850  1.0
  Sn  Sn15  1  0.750  0.046  0.650  1.0
  Sb  Sb16  1  0.250  0.031  0.230  1.0
  Sb  Sb17  1  0.250  0.531  0.270  1.0
  Sb  Sb18  1  0.750  0.969  0.770  1.0
  Sb  Sb19  1  0.750  0.469  0.730  1.0
  Sb  Sb20  1  0.250  0.208  0.406  1.0
  Sb  Sb21  1  0.250  0.708  0.094  1.0
  Sb  Sb22  1  0.750  0.792  0.594  1.0
  Sb  Sb23  1  0.750  0.292  0.906  1.0
  Sb  Sb24  1  0.250  0.216  0.623  1.0
  Sb  Sb25  1  0.250  0.716  0.877  1.0
  Sb  Sb26  1  0.750  0.784  0.377  1.0
  Sb  Sb27  1  0.750  0.284  0.123  1.0
  Sb  Sb28  1  0.250  0.570  0.470  1.0
  Sb  Sb29  1  0.250  0.070  0.030  1.0
  Sb  Sb30  1  0.750  0.430  0.530  1.0
  Sb  Sb31  1  0.750  0.930  0.970  1.0
[/CIF]
.