The material described by Sr2LaCl7 crystallizes in the monoclinic P2_1/m space group. Sr(1) is bonded to one Cl(1), one Cl(4), one Cl(5), two equivalent Cl(2), and two equivalent Cl(3) atoms to form distorted SrCl7 pentagonal bipyramids that share  a cornercorner with one Sr(1)Cl7 pentagonal bipyramid,  a cornercorner with one La(1)Cl7 pentagonal bipyramid, edges with three equivalent Sr(1)Cl7 pentagonal bipyramids, and edges with three equivalent La(1)Cl7 pentagonal bipyramids. La(1) is bonded to one Cl(1), one Cl(4), one Cl(5), two equivalent Cl(2), and two equivalent Cl(3) atoms to form LaCl7 pentagonal bipyramids that share corners with two equivalent Sr(1)Cl7 pentagonal bipyramids and edges with six equivalent Sr(1)Cl7 pentagonal bipyramids. There are five inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a trigonal non-coplanar geometry to two equivalent Sr(1) and one La(1) atom. In the second Cl site, Cl(2) is bonded in a trigonal non-coplanar geometry to two equivalent Sr(1) and one La(1) atom. In the third Cl site, Cl(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sr(1) and one La(1) atom. In the fourth Cl site, Cl(4) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sr(1) and one La(1) atom. In the fifth Cl site, Cl(5) is bonded in a trigonal non-coplanar geometry to two equivalent Sr(1) and one La(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2LaCl7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.601
_cell_length_b   7.966
_cell_length_c   8.452
_cell_angle_alpha   69.331
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   667.753
_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  0.029  0.232  0.238  1.0
  Sr  Sr1  1  0.471  0.232  0.238  1.0
  Sr  Sr2  1  0.529  0.768  0.762  1.0
  Sr  Sr3  1  0.971  0.768  0.762  1.0
  La  La4  1  0.250  0.742  0.205  1.0
  La  La5  1  0.750  0.258  0.795  1.0
  Cl  Cl6  1  0.250  0.124  0.070  1.0
  Cl  Cl7  1  0.991  0.375  0.862  1.0
  Cl  Cl8  1  0.509  0.375  0.862  1.0
  Cl  Cl9  1  0.077  0.845  0.420  1.0
  Cl  Cl10  1  0.423  0.845  0.420  1.0
  Cl  Cl11  1  0.750  0.194  0.152  1.0
  Cl  Cl12  1  0.750  0.640  0.615  1.0
  Cl  Cl13  1  0.250  0.360  0.385  1.0
  Cl  Cl14  1  0.250  0.806  0.848  1.0
  Cl  Cl15  1  0.577  0.155  0.580  1.0
  Cl  Cl16  1  0.923  0.155  0.580  1.0
  Cl  Cl17  1  0.491  0.625  0.138  1.0
  Cl  Cl18  1  0.009  0.625  0.138  1.0
  Cl  Cl19  1  0.750  0.876  0.930  1.0
[/CIF]
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The material described by Sr2LaCl7 crystallizes in the monoclinic P2_1/m space group. Sr(1) is bonded to one Cl(1), one Cl(4), one Cl(5), two equivalent Cl(2), and two equivalent Cl(3) atoms to form distorted SrCl7 pentagonal bipyramids that share  a cornercorner with one Sr(1)Cl7 pentagonal bipyramid,  a cornercorner with one La(1)Cl7 pentagonal bipyramid, edges with three equivalent Sr(1)Cl7 pentagonal bipyramids, and edges with three equivalent La(1)Cl7 pentagonal bipyramids. La(1) is bonded to one Cl(1), one Cl(4), one Cl(5), two equivalent Cl(2), and two equivalent Cl(3) atoms to form LaCl7 pentagonal bipyramids that share corners with two equivalent Sr(1)Cl7 pentagonal bipyramids and edges with six equivalent Sr(1)Cl7 pentagonal bipyramids. There are five inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a trigonal non-coplanar geometry to two equivalent Sr(1) and one La(1) atom. In the second Cl site, Cl(2) is bonded in a trigonal non-coplanar geometry to two equivalent Sr(1) and one La(1) atom. In the third Cl site, Cl(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sr(1) and one La(1) atom. In the fourth Cl site, Cl(4) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sr(1) and one La(1) atom. In the fifth Cl site, Cl(5) is bonded in a trigonal non-coplanar geometry to two equivalent Sr(1) and one La(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2LaCl7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.601
_cell_length_b   7.966
_cell_length_c   8.452
_cell_angle_alpha   69.331
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   667.753
_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  0.029  0.232  0.238  1.0
  Sr  Sr1  1  0.471  0.232  0.238  1.0
  Sr  Sr2  1  0.529  0.768  0.762  1.0
  Sr  Sr3  1  0.971  0.768  0.762  1.0
  La  La4  1  0.250  0.742  0.205  1.0
  La  La5  1  0.750  0.258  0.795  1.0
  Cl  Cl6  1  0.250  0.124  0.070  1.0
  Cl  Cl7  1  0.991  0.375  0.862  1.0
  Cl  Cl8  1  0.509  0.375  0.862  1.0
  Cl  Cl9  1  0.077  0.845  0.420  1.0
  Cl  Cl10  1  0.423  0.845  0.420  1.0
  Cl  Cl11  1  0.750  0.194  0.152  1.0
  Cl  Cl12  1  0.750  0.640  0.615  1.0
  Cl  Cl13  1  0.250  0.360  0.385  1.0
  Cl  Cl14  1  0.250  0.806  0.848  1.0
  Cl  Cl15  1  0.577  0.155  0.580  1.0
  Cl  Cl16  1  0.923  0.155  0.580  1.0
  Cl  Cl17  1  0.491  0.625  0.138  1.0
  Cl  Cl18  1  0.009  0.625  0.138  1.0
  Cl  Cl19  1  0.750  0.876  0.930  1.0
[/CIF]
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