The compound described by SrZn2Sn2 crystallizes in the monoclinic P2_1/m space group. Sr(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 Sr(1), one Sn(1), and four equivalent Sn(2) atoms. In the second Zn site, Zn(2) is bonded in a 4-coordinate geometry to four equivalent Sr(1) and four equivalent Sn(1) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to four equivalent Sr(1), one Zn(1), and four equivalent Zn(2) atoms. In the second Sn site, Sn(2) is bonded to four equivalent Sr(1) and four equivalent Zn(1) atoms to form a mixture of distorted face and edge-sharing SnSr4Zn4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr(ZnSn)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.618
_cell_length_b   4.643
_cell_length_c   11.331
_cell_angle_alpha   89.235
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   242.927
_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
  Sr  Sr0  1  0.250  0.738  0.757  1.0
  Sr  Sr1  1  0.750  0.262  0.243  1.0
  Zn  Zn2  1  0.250  0.746  0.361  1.0
  Zn  Zn3  1  0.750  0.254  0.639  1.0
  Zn  Zn4  1  0.250  0.281  0.000  1.0
  Zn  Zn5  1  0.750  0.719  1.000  1.0
  Sn  Sn6  1  0.250  0.782  0.130  1.0
  Sn  Sn7  1  0.750  0.218  0.870  1.0
  Sn  Sn8  1  0.250  0.245  0.500  1.0
  Sn  Sn9  1  0.750  0.755  0.500  1.0
[/CIF]
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The compound described by SrZn2Sn2 crystallizes in the monoclinic P2_1/m space group. Sr(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 Sr(1), one Sn(1), and four equivalent Sn(2) atoms. In the second Zn site, Zn(2) is bonded in a 4-coordinate geometry to four equivalent Sr(1) and four equivalent Sn(1) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to four equivalent Sr(1), one Zn(1), and four equivalent Zn(2) atoms. In the second Sn site, Sn(2) is bonded to four equivalent Sr(1) and four equivalent Zn(1) atoms to form a mixture of distorted face and edge-sharing SnSr4Zn4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr(ZnSn)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.618
_cell_length_b   4.643
_cell_length_c   11.331
_cell_angle_alpha   89.235
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   242.927
_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
  Sr  Sr0  1  0.250  0.738  0.757  1.0
  Sr  Sr1  1  0.750  0.262  0.243  1.0
  Zn  Zn2  1  0.250  0.746  0.361  1.0
  Zn  Zn3  1  0.750  0.254  0.639  1.0
  Zn  Zn4  1  0.250  0.281  0.000  1.0
  Zn  Zn5  1  0.750  0.719  1.000  1.0
  Sn  Sn6  1  0.250  0.782  0.130  1.0
  Sn  Sn7  1  0.750  0.218  0.870  1.0
  Sn  Sn8  1  0.250  0.245  0.500  1.0
  Sn  Sn9  1  0.750  0.755  0.500  1.0
[/CIF]
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