The structure described by EuZn2Sn2 crystallizes in the monoclinic P2_1/m space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Zn(1), four equivalent Zn(2), four equivalent Sn(1), and four equivalent Sn(2) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Sn(1), and four equivalent Sn(2) atoms. In the second Zn site, Zn(2) is bonded to four equivalent Eu(1) and four equivalent Sn(1) atoms to form distorted ZnEu4Sn4 tetrahedra that share corners with twelve equivalent Sn(2)Eu4Zn4 tetrahedra, edges with two equivalent Sn(2)Eu4Zn4 tetrahedra, edges with four equivalent Zn(2)Eu4Sn4 tetrahedra, and faces with four equivalent Zn(2)Eu4Sn4 tetrahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Zn(1), and four equivalent Zn(2) atoms. In the second Sn site, Sn(2) is bonded to four equivalent Eu(1) and four equivalent Zn(1) atoms to form distorted SnEu4Zn4 tetrahedra that share corners with twelve equivalent Zn(2)Eu4Sn4 tetrahedra, edges with two equivalent Zn(2)Eu4Sn4 tetrahedra, edges with four equivalent Sn(2)Eu4Zn4 tetrahedra, and faces with four equivalent Sn(2)Eu4Zn4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu(ZnSn)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.585
_cell_length_b   4.637
_cell_length_c   11.330
_cell_angle_alpha   89.257
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   240.828
_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
  Eu  Eu0  1  0.750  0.259  0.246  1.0
  Eu  Eu1  1  0.250  0.741  0.754  1.0
  Zn  Zn2  1  0.250  0.739  0.361  1.0
  Zn  Zn3  1  0.750  0.720  0.999  1.0
  Zn  Zn4  1  0.750  0.261  0.639  1.0
  Zn  Zn5  1  0.250  0.280  0.001  1.0
  Sn  Sn6  1  0.250  0.779  0.132  1.0
  Sn  Sn7  1  0.750  0.221  0.868  1.0
  Sn  Sn8  1  0.750  0.758  0.501  1.0
  Sn  Sn9  1  0.250  0.242  0.499  1.0
[/CIF]
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The structure described by EuZn2Sn2 crystallizes in the monoclinic P2_1/m space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Zn(1), four equivalent Zn(2), four equivalent Sn(1), and four equivalent Sn(2) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Sn(1), and four equivalent Sn(2) atoms. In the second Zn site, Zn(2) is bonded to four equivalent Eu(1) and four equivalent Sn(1) atoms to form distorted ZnEu4Sn4 tetrahedra that share corners with twelve equivalent Sn(2)Eu4Zn4 tetrahedra, edges with two equivalent Sn(2)Eu4Zn4 tetrahedra, edges with four equivalent Zn(2)Eu4Sn4 tetrahedra, and faces with four equivalent Zn(2)Eu4Sn4 tetrahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Zn(1), and four equivalent Zn(2) atoms. In the second Sn site, Sn(2) is bonded to four equivalent Eu(1) and four equivalent Zn(1) atoms to form distorted SnEu4Zn4 tetrahedra that share corners with twelve equivalent Zn(2)Eu4Sn4 tetrahedra, edges with two equivalent Zn(2)Eu4Sn4 tetrahedra, edges with four equivalent Sn(2)Eu4Zn4 tetrahedra, and faces with four equivalent Sn(2)Eu4Zn4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu(ZnSn)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.585
_cell_length_b   4.637
_cell_length_c   11.330
_cell_angle_alpha   89.257
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   240.828
_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
  Eu  Eu0  1  0.750  0.259  0.246  1.0
  Eu  Eu1  1  0.250  0.741  0.754  1.0
  Zn  Zn2  1  0.250  0.739  0.361  1.0
  Zn  Zn3  1  0.750  0.720  0.999  1.0
  Zn  Zn4  1  0.750  0.261  0.639  1.0
  Zn  Zn5  1  0.250  0.280  0.001  1.0
  Sn  Sn6  1  0.250  0.779  0.132  1.0
  Sn  Sn7  1  0.750  0.221  0.868  1.0
  Sn  Sn8  1  0.750  0.758  0.501  1.0
  Sn  Sn9  1  0.250  0.242  0.499  1.0
[/CIF]
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