The structure described by Li2La3Ni2Sn7 crystallizes in the orthorhombic Cmmm space group. Li(1) is bonded to two equivalent La(2), two equivalent Ni(1), one Sn(4), and two equivalent Sn(2) atoms to form distorted LiLa2Ni2Sn3 hexagonal pyramids that share corners with two equivalent Li(1)La2Ni2Sn3 hexagonal pyramids, corners with two equivalent La(2)Li2Sn4 octahedra, edges with two equivalent Li(1)La2Ni2Sn3 hexagonal pyramids, and  an edgeedge with one La(2)Li2Sn4 octahedra. The corner-sharing octahedral tilt angles are 19°. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 14-coordinate geometry to two equivalent Ni(1), four equivalent Sn(1), four equivalent Sn(3), and four equivalent Sn(4) atoms. In the second La site, La(2) is bonded to two equivalent Li(1), two equivalent Sn(1), and two equivalent Sn(2) atoms to form distorted LaLi2Sn4 octahedra that share corners with two equivalent Li(1)La2Ni2Sn3 hexagonal pyramids, corners with two equivalent La(2)Li2Sn4 octahedra,  an edgeedge with one Li(1)La2Ni2Sn3 hexagonal pyramid, and edges with two equivalent La(2)Li2Sn4 octahedra. The corner-sharing octahedral tilt angles are 6°. Ni(1) is bonded in a 7-coordinate geometry to two equivalent Li(1), one La(1), one Sn(2), two equivalent Sn(1), and two equivalent Sn(4) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 6-coordinate geometry to two equivalent La(1), two equivalent La(2), and two equivalent Ni(1) atoms. In the second Sn site, Sn(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Li(1), two equivalent La(2), and one Ni(1) atom. In the third Sn site, Sn(3) is bonded in a 4-coordinate geometry to four equivalent La(1) atoms. In the fourth Sn site, Sn(4) is bonded in a 5-coordinate geometry to one Li(1), two equivalent La(1), and two equivalent Ni(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2La3Ni2Sn7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.520
_cell_length_b   5.221
_cell_length_c   14.106
_cell_angle_alpha   100.664
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   327.120
_cell_formula_units_Z   1
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  0.320  0.641  1.0
  Li  Li1  1  0.000  0.680  0.359  1.0
  La  La2  1  0.500  0.500  0.000  1.0
  La  La3  1  0.000  0.184  0.368  1.0
  La  La4  1  0.000  0.816  0.632  1.0
  Ni  Ni5  1  0.500  0.368  0.736  1.0
  Ni  Ni6  1  0.500  0.632  0.264  1.0
  Sn  Sn7  1  0.500  0.090  0.181  1.0
  Sn  Sn8  1  0.500  0.910  0.819  1.0
  Sn  Sn9  1  0.500  0.275  0.550  1.0
  Sn  Sn10  1  0.500  0.725  0.450  1.0
  Sn  Sn11  1  0.000  0.000  0.000  1.0
  Sn  Sn12  1  0.000  0.413  0.827  1.0
  Sn  Sn13  1  0.000  0.587  0.173  1.0
[/CIF]
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The structure described by Li2La3Ni2Sn7 crystallizes in the orthorhombic Cmmm space group. Li(1) is bonded to two equivalent La(2), two equivalent Ni(1), one Sn(4), and two equivalent Sn(2) atoms to form distorted LiLa2Ni2Sn3 hexagonal pyramids that share corners with two equivalent Li(1)La2Ni2Sn3 hexagonal pyramids, corners with two equivalent La(2)Li2Sn4 octahedra, edges with two equivalent Li(1)La2Ni2Sn3 hexagonal pyramids, and  an edgeedge with one La(2)Li2Sn4 octahedra. The corner-sharing octahedral tilt angles are 19°. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 14-coordinate geometry to two equivalent Ni(1), four equivalent Sn(1), four equivalent Sn(3), and four equivalent Sn(4) atoms. In the second La site, La(2) is bonded to two equivalent Li(1), two equivalent Sn(1), and two equivalent Sn(2) atoms to form distorted LaLi2Sn4 octahedra that share corners with two equivalent Li(1)La2Ni2Sn3 hexagonal pyramids, corners with two equivalent La(2)Li2Sn4 octahedra,  an edgeedge with one Li(1)La2Ni2Sn3 hexagonal pyramid, and edges with two equivalent La(2)Li2Sn4 octahedra. The corner-sharing octahedral tilt angles are 6°. Ni(1) is bonded in a 7-coordinate geometry to two equivalent Li(1), one La(1), one Sn(2), two equivalent Sn(1), and two equivalent Sn(4) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 6-coordinate geometry to two equivalent La(1), two equivalent La(2), and two equivalent Ni(1) atoms. In the second Sn site, Sn(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Li(1), two equivalent La(2), and one Ni(1) atom. In the third Sn site, Sn(3) is bonded in a 4-coordinate geometry to four equivalent La(1) atoms. In the fourth Sn site, Sn(4) is bonded in a 5-coordinate geometry to one Li(1), two equivalent La(1), and two equivalent Ni(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2La3Ni2Sn7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.520
_cell_length_b   5.221
_cell_length_c   14.106
_cell_angle_alpha   100.664
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   327.120
_cell_formula_units_Z   1
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  0.320  0.641  1.0
  Li  Li1  1  0.000  0.680  0.359  1.0
  La  La2  1  0.500  0.500  0.000  1.0
  La  La3  1  0.000  0.184  0.368  1.0
  La  La4  1  0.000  0.816  0.632  1.0
  Ni  Ni5  1  0.500  0.368  0.736  1.0
  Ni  Ni6  1  0.500  0.632  0.264  1.0
  Sn  Sn7  1  0.500  0.090  0.181  1.0
  Sn  Sn8  1  0.500  0.910  0.819  1.0
  Sn  Sn9  1  0.500  0.275  0.550  1.0
  Sn  Sn10  1  0.500  0.725  0.450  1.0
  Sn  Sn11  1  0.000  0.000  0.000  1.0
  Sn  Sn12  1  0.000  0.413  0.827  1.0
  Sn  Sn13  1  0.000  0.587  0.173  1.0
[/CIF]
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