The compound described by Li2Sr4Si4N8O crystallizes in the tetragonal P4/mnc space group. Li(1) is bonded in a distorted single-bond geometry to four equivalent N(1) and one O(1) atom. Sr(1) is bonded in a 8-coordinate geometry to three equivalent N(1), four equivalent N(2), and one O(1) atom. Si(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form corner-sharing SiN4 tetrahedra. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 7-coordinate geometry to two equivalent Li(1), three equivalent Sr(1), and two equivalent Si(1) atoms. In the second N site, N(2) is bonded in a 2-coordinate geometry to four equivalent Sr(1) and two equivalent Si(1) atoms. O(1) is bonded in a distorted octahedral geometry to two equivalent Li(1) and four equivalent Sr(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr4Li2Si4N8O
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.374
_cell_length_b   9.374
_cell_length_c   5.609
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   492.862
_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  0.945  0.735  0.500  1.0
  Sr  Sr1  1  0.055  0.265  0.500  1.0
  Sr  Sr2  1  0.445  0.765  0.000  1.0
  Sr  Sr3  1  0.555  0.235  0.000  1.0
  Sr  Sr4  1  0.265  0.945  0.500  1.0
  Sr  Sr5  1  0.735  0.055  0.500  1.0
  Sr  Sr6  1  0.235  0.445  0.000  1.0
  Sr  Sr7  1  0.765  0.555  0.000  1.0
  Li  Li8  1  0.000  0.000  0.183  1.0
  Li  Li9  1  0.500  0.500  0.683  1.0
  Li  Li10  1  0.000  0.000  0.817  1.0
  Li  Li11  1  0.500  0.500  0.317  1.0
  Si  Si12  1  0.620  0.731  0.500  1.0
  Si  Si13  1  0.380  0.269  0.500  1.0
  Si  Si14  1  0.120  0.769  0.000  1.0
  Si  Si15  1  0.880  0.231  0.000  1.0
  Si  Si16  1  0.269  0.620  0.500  1.0
  Si  Si17  1  0.731  0.380  0.500  1.0
  Si  Si18  1  0.231  0.120  0.000  1.0
  Si  Si19  1  0.769  0.880  0.000  1.0
  N  N20  1  0.437  0.705  0.500  1.0
  N  N21  1  0.563  0.295  0.500  1.0
  N  N22  1  0.937  0.795  0.000  1.0
  N  N23  1  0.063  0.205  0.000  1.0
  N  N24  1  0.295  0.437  0.500  1.0
  N  N25  1  0.705  0.563  0.500  1.0
  N  N26  1  0.205  0.937  0.000  1.0
  N  N27  1  0.795  0.063  0.000  1.0
  N  N28  1  0.674  0.826  0.250  1.0
  N  N29  1  0.326  0.174  0.250  1.0
  N  N30  1  0.174  0.674  0.750  1.0
  N  N31  1  0.826  0.326  0.750  1.0
  N  N32  1  0.174  0.674  0.250  1.0
  N  N33  1  0.826  0.326  0.250  1.0
  N  N34  1  0.326  0.174  0.750  1.0
  N  N35  1  0.674  0.826  0.750  1.0
  O  O36  1  0.000  0.000  0.500  1.0
  O  O37  1  0.500  0.500  0.000  1.0
[/CIF]
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The compound described by Li2Sr4Si4N8O crystallizes in the tetragonal P4/mnc space group. Li(1) is bonded in a distorted single-bond geometry to four equivalent N(1) and one O(1) atom. Sr(1) is bonded in a 8-coordinate geometry to three equivalent N(1), four equivalent N(2), and one O(1) atom. Si(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form corner-sharing SiN4 tetrahedra. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 7-coordinate geometry to two equivalent Li(1), three equivalent Sr(1), and two equivalent Si(1) atoms. In the second N site, N(2) is bonded in a 2-coordinate geometry to four equivalent Sr(1) and two equivalent Si(1) atoms. O(1) is bonded in a distorted octahedral geometry to two equivalent Li(1) and four equivalent Sr(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr4Li2Si4N8O
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.374
_cell_length_b   9.374
_cell_length_c   5.609
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   492.862
_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  0.945  0.735  0.500  1.0
  Sr  Sr1  1  0.055  0.265  0.500  1.0
  Sr  Sr2  1  0.445  0.765  0.000  1.0
  Sr  Sr3  1  0.555  0.235  0.000  1.0
  Sr  Sr4  1  0.265  0.945  0.500  1.0
  Sr  Sr5  1  0.735  0.055  0.500  1.0
  Sr  Sr6  1  0.235  0.445  0.000  1.0
  Sr  Sr7  1  0.765  0.555  0.000  1.0
  Li  Li8  1  0.000  0.000  0.183  1.0
  Li  Li9  1  0.500  0.500  0.683  1.0
  Li  Li10  1  0.000  0.000  0.817  1.0
  Li  Li11  1  0.500  0.500  0.317  1.0
  Si  Si12  1  0.620  0.731  0.500  1.0
  Si  Si13  1  0.380  0.269  0.500  1.0
  Si  Si14  1  0.120  0.769  0.000  1.0
  Si  Si15  1  0.880  0.231  0.000  1.0
  Si  Si16  1  0.269  0.620  0.500  1.0
  Si  Si17  1  0.731  0.380  0.500  1.0
  Si  Si18  1  0.231  0.120  0.000  1.0
  Si  Si19  1  0.769  0.880  0.000  1.0
  N  N20  1  0.437  0.705  0.500  1.0
  N  N21  1  0.563  0.295  0.500  1.0
  N  N22  1  0.937  0.795  0.000  1.0
  N  N23  1  0.063  0.205  0.000  1.0
  N  N24  1  0.295  0.437  0.500  1.0
  N  N25  1  0.705  0.563  0.500  1.0
  N  N26  1  0.205  0.937  0.000  1.0
  N  N27  1  0.795  0.063  0.000  1.0
  N  N28  1  0.674  0.826  0.250  1.0
  N  N29  1  0.326  0.174  0.250  1.0
  N  N30  1  0.174  0.674  0.750  1.0
  N  N31  1  0.826  0.326  0.750  1.0
  N  N32  1  0.174  0.674  0.250  1.0
  N  N33  1  0.826  0.326  0.250  1.0
  N  N34  1  0.326  0.174  0.750  1.0
  N  N35  1  0.674  0.826  0.750  1.0
  O  O36  1  0.000  0.000  0.500  1.0
  O  O37  1  0.500  0.500  0.000  1.0
[/CIF]
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