The crystal structure described by Li7Sn2 crystallizes in the orthorhombic Cmmm space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded in a distorted body-centered cubic geometry to four equivalent Li(5) and four equivalent Sn(1) atoms. In the second Li site, Li(2) is bonded in a 10-coordinate geometry to four equivalent Li(3), four equivalent Li(6), and two equivalent Sn(1) atoms. In the third Li site, Li(3) is bonded in a 4-coordinate geometry to two equivalent Li(2), two equivalent Li(5), two equivalent Sn(1), and two equivalent Sn(2) atoms. In the fourth Li site, Li(4) is bonded in a 10-coordinate geometry to two equivalent Li(6), four equivalent Li(5), two equivalent Sn(1), and two equivalent Sn(2) atoms. In the fifth Li site, Li(5) is bonded in a 11-coordinate geometry to one Li(1), one Li(3), one Li(5), two equivalent Li(4), two equivalent Li(6), two equivalent Sn(1), and two equivalent Sn(2) atoms. In the sixth Li site, Li(6) is bonded in a 3-coordinate geometry to one Li(2), one Li(4), two equivalent Li(5), one Sn(1), and two equivalent Sn(2) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to one Li(2), two equivalent Li(1), two equivalent Li(3), two equivalent Li(4), two equivalent Li(6), and four equivalent Li(5) atoms. In the second Sn site, Sn(2) is bonded in a 12-coordinate geometry to two equivalent Li(3), two equivalent Li(4), four equivalent Li(5), and four equivalent Li(6) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li7Sn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.701
_cell_length_b   8.443
_cell_length_c   8.443
_cell_angle_alpha   109.498
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   315.868
_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
  Li  Li0  1  0.000  0.000  0.000  1.0
  Li  Li1  1  0.500  0.500  0.500  1.0
  Li  Li2  1  0.000  0.344  0.344  1.0
  Li  Li3  1  0.000  0.656  0.656  1.0
  Li  Li4  1  0.500  0.173  0.827  1.0
  Li  Li5  1  0.500  0.827  0.173  1.0
  Li  Li6  1  0.000  0.345  0.030  1.0
  Li  Li7  1  0.000  0.655  0.970  1.0
  Li  Li8  1  0.000  0.030  0.345  1.0
  Li  Li9  1  0.000  0.970  0.655  1.0
  Li  Li10  1  0.500  0.504  0.184  1.0
  Li  Li11  1  0.500  0.496  0.816  1.0
  Li  Li12  1  0.500  0.184  0.504  1.0
  Li  Li13  1  0.500  0.816  0.496  1.0
  Sn  Sn14  1  0.500  0.162  0.162  1.0
  Sn  Sn15  1  0.500  0.838  0.838  1.0
  Sn  Sn16  1  0.000  0.318  0.682  1.0
  Sn  Sn17  1  0.000  0.682  0.318  1.0
[/CIF]
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The crystal structure described by Li7Sn2 crystallizes in the orthorhombic Cmmm space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded in a distorted body-centered cubic geometry to four equivalent Li(5) and four equivalent Sn(1) atoms. In the second Li site, Li(2) is bonded in a 10-coordinate geometry to four equivalent Li(3), four equivalent Li(6), and two equivalent Sn(1) atoms. In the third Li site, Li(3) is bonded in a 4-coordinate geometry to two equivalent Li(2), two equivalent Li(5), two equivalent Sn(1), and two equivalent Sn(2) atoms. In the fourth Li site, Li(4) is bonded in a 10-coordinate geometry to two equivalent Li(6), four equivalent Li(5), two equivalent Sn(1), and two equivalent Sn(2) atoms. In the fifth Li site, Li(5) is bonded in a 11-coordinate geometry to one Li(1), one Li(3), one Li(5), two equivalent Li(4), two equivalent Li(6), two equivalent Sn(1), and two equivalent Sn(2) atoms. In the sixth Li site, Li(6) is bonded in a 3-coordinate geometry to one Li(2), one Li(4), two equivalent Li(5), one Sn(1), and two equivalent Sn(2) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to one Li(2), two equivalent Li(1), two equivalent Li(3), two equivalent Li(4), two equivalent Li(6), and four equivalent Li(5) atoms. In the second Sn site, Sn(2) is bonded in a 12-coordinate geometry to two equivalent Li(3), two equivalent Li(4), four equivalent Li(5), and four equivalent Li(6) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li7Sn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.701
_cell_length_b   8.443
_cell_length_c   8.443
_cell_angle_alpha   109.498
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   315.868
_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
  Li  Li0  1  0.000  0.000  0.000  1.0
  Li  Li1  1  0.500  0.500  0.500  1.0
  Li  Li2  1  0.000  0.344  0.344  1.0
  Li  Li3  1  0.000  0.656  0.656  1.0
  Li  Li4  1  0.500  0.173  0.827  1.0
  Li  Li5  1  0.500  0.827  0.173  1.0
  Li  Li6  1  0.000  0.345  0.030  1.0
  Li  Li7  1  0.000  0.655  0.970  1.0
  Li  Li8  1  0.000  0.030  0.345  1.0
  Li  Li9  1  0.000  0.970  0.655  1.0
  Li  Li10  1  0.500  0.504  0.184  1.0
  Li  Li11  1  0.500  0.496  0.816  1.0
  Li  Li12  1  0.500  0.184  0.504  1.0
  Li  Li13  1  0.500  0.816  0.496  1.0
  Sn  Sn14  1  0.500  0.162  0.162  1.0
  Sn  Sn15  1  0.500  0.838  0.838  1.0
  Sn  Sn16  1  0.000  0.318  0.682  1.0
  Sn  Sn17  1  0.000  0.682  0.318  1.0
[/CIF]
.