The compound described by Sr2LaI7 crystallizes in the monoclinic P2_1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one I(1), one I(11), one I(14), one I(3), one I(8), and one I(9) atom. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one I(10), one I(13), one I(3), one I(4), one I(6), one I(7), and one I(9) atom. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one I(10), one I(14), one I(2), one I(4), one I(6), one I(8), and one I(9) atom. In the fourth Sr site, Sr(4) is bonded in a 6-coordinate geometry to one I(10), one I(11), one I(12), one I(13), one I(5), and one I(7) atom. There are two inequivalent La sites. In the first La site, La(1) is bonded in an octahedral geometry to one I(11), one I(13), one I(3), one I(5), one I(6), and one I(7) atom. In the second La site, La(2) is bonded in an octahedral geometry to one I(1), one I(12), one I(14), one I(2), one I(4), and one I(8) atom. There are fourteen inequivalent I sites. In the first I site, I(1) is bonded in a water-like geometry to one Sr(1) and one La(2) atom. In the second I site, I(2) is bonded in an L-shaped geometry to one Sr(3) and one La(2) atom. In the third I site, I(3) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one La(1) atom. In the fourth I site, I(4) is bonded in a trigonal planar geometry to one Sr(2), one Sr(3), and one La(2) atom. In the fifth I site, I(5) is bonded in a bent 120 degrees geometry to one Sr(4) and one La(1) atom. In the sixth I site, I(6) is bonded in a distorted trigonal non-coplanar geometry to one Sr(2), one Sr(3), and one La(1) atom. In the seventh I site, I(7) is bonded in a distorted T-shaped geometry to one Sr(2), one Sr(4), and one La(1) atom. In the eighth I site, I(8) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(3), and one La(2) atom. In the ninth I site, I(9) is bonded in a trigonal non-coplanar geometry to one Sr(1), one Sr(2), and one Sr(3) atom. In the tenth I site, I(10) is bonded in a T-shaped geometry to one Sr(2), one Sr(3), and one Sr(4) atom. In the eleventh I site, I(11) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(4), and one La(1) atom. In the twelfth I site, I(12) is bonded in a bent 120 degrees geometry to one Sr(4) and one La(2) atom. In the thirteenth I site, I(13) is bonded in a distorted T-shaped geometry to one Sr(2), one Sr(4), and one La(1) atom. In the fourteenth I site, I(14) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(3), and one La(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2LaI7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.803
_cell_length_b   8.392
_cell_length_c   15.287
_cell_angle_alpha   79.770
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1868.953
_cell_formula_units_Z   4
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  0.533  0.778  0.750  1.0
  Sr  Sr1  1  0.127  0.750  0.672  1.0
  Sr  Sr2  1  0.797  0.762  0.169  1.0
  Sr  Sr3  1  0.373  0.621  0.256  1.0
  Sr  Sr4  1  0.873  0.379  0.744  1.0
  Sr  Sr5  1  0.297  0.238  0.831  1.0
  Sr  Sr6  1  0.627  0.250  0.328  1.0
  Sr  Sr7  1  0.033  0.222  0.250  1.0
  La  La8  1  0.849  0.848  0.556  1.0
  La  La9  1  0.070  0.835  0.054  1.0
  La  La10  1  0.570  0.165  0.946  1.0
  La  La11  1  0.349  0.152  0.444  1.0
  I  I12  1  0.683  0.888  0.886  1.0
  I  I13  1  0.404  0.941  0.994  1.0
  I  I14  1  0.527  0.975  0.513  1.0
  I  I15  1  0.166  0.892  0.864  1.0
  I  I16  1  0.269  0.836  0.394  1.0
  I  I17  1  0.749  0.888  0.369  1.0
  I  I18  1  0.920  0.788  0.756  1.0
  I  I19  1  0.997  0.823  0.256  1.0
  I  I20  1  0.337  0.611  0.692  1.0
  I  I21  1  0.590  0.604  0.188  1.0
  I  I22  1  0.689  0.610  0.632  1.0
  I  I23  1  0.719  0.427  0.888  1.0
  I  I24  1  0.977  0.534  0.558  1.0
  I  I25  1  0.435  0.462  0.938  1.0
  I  I26  1  0.935  0.538  0.062  1.0
  I  I27  1  0.477  0.466  0.442  1.0
  I  I28  1  0.219  0.573  0.112  1.0
  I  I29  1  0.189  0.390  0.368  1.0
  I  I30  1  0.090  0.396  0.812  1.0
  I  I31  1  0.837  0.389  0.308  1.0
  I  I32  1  0.497  0.177  0.744  1.0
  I  I33  1  0.420  0.212  0.244  1.0
  I  I34  1  0.249  0.112  0.631  1.0
  I  I35  1  0.769  0.164  0.606  1.0
  I  I36  1  0.666  0.108  0.136  1.0
  I  I37  1  0.027  0.025  0.487  1.0
  I  I38  1  0.904  0.059  0.006  1.0
  I  I39  1  0.183  0.112  0.114  1.0
[/CIF]
.
The compound described by Sr2LaI7 crystallizes in the monoclinic P2_1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one I(1), one I(11), one I(14), one I(3), one I(8), and one I(9) atom. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one I(10), one I(13), one I(3), one I(4), one I(6), one I(7), and one I(9) atom. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one I(10), one I(14), one I(2), one I(4), one I(6), one I(8), and one I(9) atom. In the fourth Sr site, Sr(4) is bonded in a 6-coordinate geometry to one I(10), one I(11), one I(12), one I(13), one I(5), and one I(7) atom. There are two inequivalent La sites. In the first La site, La(1) is bonded in an octahedral geometry to one I(11), one I(13), one I(3), one I(5), one I(6), and one I(7) atom. In the second La site, La(2) is bonded in an octahedral geometry to one I(1), one I(12), one I(14), one I(2), one I(4), and one I(8) atom. There are fourteen inequivalent I sites. In the first I site, I(1) is bonded in a water-like geometry to one Sr(1) and one La(2) atom. In the second I site, I(2) is bonded in an L-shaped geometry to one Sr(3) and one La(2) atom. In the third I site, I(3) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one La(1) atom. In the fourth I site, I(4) is bonded in a trigonal planar geometry to one Sr(2), one Sr(3), and one La(2) atom. In the fifth I site, I(5) is bonded in a bent 120 degrees geometry to one Sr(4) and one La(1) atom. In the sixth I site, I(6) is bonded in a distorted trigonal non-coplanar geometry to one Sr(2), one Sr(3), and one La(1) atom. In the seventh I site, I(7) is bonded in a distorted T-shaped geometry to one Sr(2), one Sr(4), and one La(1) atom. In the eighth I site, I(8) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(3), and one La(2) atom. In the ninth I site, I(9) is bonded in a trigonal non-coplanar geometry to one Sr(1), one Sr(2), and one Sr(3) atom. In the tenth I site, I(10) is bonded in a T-shaped geometry to one Sr(2), one Sr(3), and one Sr(4) atom. In the eleventh I site, I(11) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(4), and one La(1) atom. In the twelfth I site, I(12) is bonded in a bent 120 degrees geometry to one Sr(4) and one La(2) atom. In the thirteenth I site, I(13) is bonded in a distorted T-shaped geometry to one Sr(2), one Sr(4), and one La(1) atom. In the fourteenth I site, I(14) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(3), and one La(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2LaI7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.803
_cell_length_b   8.392
_cell_length_c   15.287
_cell_angle_alpha   79.770
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1868.953
_cell_formula_units_Z   4
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  0.533  0.778  0.750  1.0
  Sr  Sr1  1  0.127  0.750  0.672  1.0
  Sr  Sr2  1  0.797  0.762  0.169  1.0
  Sr  Sr3  1  0.373  0.621  0.256  1.0
  Sr  Sr4  1  0.873  0.379  0.744  1.0
  Sr  Sr5  1  0.297  0.238  0.831  1.0
  Sr  Sr6  1  0.627  0.250  0.328  1.0
  Sr  Sr7  1  0.033  0.222  0.250  1.0
  La  La8  1  0.849  0.848  0.556  1.0
  La  La9  1  0.070  0.835  0.054  1.0
  La  La10  1  0.570  0.165  0.946  1.0
  La  La11  1  0.349  0.152  0.444  1.0
  I  I12  1  0.683  0.888  0.886  1.0
  I  I13  1  0.404  0.941  0.994  1.0
  I  I14  1  0.527  0.975  0.513  1.0
  I  I15  1  0.166  0.892  0.864  1.0
  I  I16  1  0.269  0.836  0.394  1.0
  I  I17  1  0.749  0.888  0.369  1.0
  I  I18  1  0.920  0.788  0.756  1.0
  I  I19  1  0.997  0.823  0.256  1.0
  I  I20  1  0.337  0.611  0.692  1.0
  I  I21  1  0.590  0.604  0.188  1.0
  I  I22  1  0.689  0.610  0.632  1.0
  I  I23  1  0.719  0.427  0.888  1.0
  I  I24  1  0.977  0.534  0.558  1.0
  I  I25  1  0.435  0.462  0.938  1.0
  I  I26  1  0.935  0.538  0.062  1.0
  I  I27  1  0.477  0.466  0.442  1.0
  I  I28  1  0.219  0.573  0.112  1.0
  I  I29  1  0.189  0.390  0.368  1.0
  I  I30  1  0.090  0.396  0.812  1.0
  I  I31  1  0.837  0.389  0.308  1.0
  I  I32  1  0.497  0.177  0.744  1.0
  I  I33  1  0.420  0.212  0.244  1.0
  I  I34  1  0.249  0.112  0.631  1.0
  I  I35  1  0.769  0.164  0.606  1.0
  I  I36  1  0.666  0.108  0.136  1.0
  I  I37  1  0.027  0.025  0.487  1.0
  I  I38  1  0.904  0.059  0.006  1.0
  I  I39  1  0.183  0.112  0.114  1.0
[/CIF]
.