The structure described by Sr5Si3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 4-coordinate geometry to two equivalent Si(1) and two equivalent Si(2) atoms. In the second Sr site, Sr(2) is bonded to four equivalent Si(1) atoms to form distorted edge-sharing SrSi4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 6-coordinate geometry to two equivalent Sr(2) and four equivalent Sr(1) atoms. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to eight equivalent Sr(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr5Si3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.461
_cell_length_b   9.461
_cell_length_c   9.461
_cell_angle_alpha   96.783
_cell_angle_beta   96.783
_cell_angle_gamma   139.800
_symmetry_Int_Tables_number   1
_cell_volume   513.329
_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  0.294  0.416  0.709  1.0
  Sr  Sr1  1  0.706  0.584  0.291  1.0
  Sr  Sr2  1  0.416  0.706  0.122  1.0
  Sr  Sr3  1  0.584  0.294  0.878  1.0
  Sr  Sr4  1  0.916  0.794  0.709  1.0
  Sr  Sr5  1  0.206  0.916  0.122  1.0
  Sr  Sr6  1  0.794  0.084  0.878  1.0
  Sr  Sr7  1  0.084  0.206  0.291  1.0
  Sr  Sr8  1  0.750  0.250  0.500  1.0
  Sr  Sr9  1  0.250  0.750  0.500  1.0
  Si  Si10  1  0.846  0.346  0.191  1.0
  Si  Si11  1  0.654  0.846  0.500  1.0
  Si  Si12  1  0.346  0.154  0.500  1.0
  Si  Si13  1  0.154  0.654  0.809  1.0
  Si  Si14  1  0.750  0.750  0.000  1.0
  Si  Si15  1  0.250  0.250  0.000  1.0
[/CIF]
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The structure described by Sr5Si3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 4-coordinate geometry to two equivalent Si(1) and two equivalent Si(2) atoms. In the second Sr site, Sr(2) is bonded to four equivalent Si(1) atoms to form distorted edge-sharing SrSi4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 6-coordinate geometry to two equivalent Sr(2) and four equivalent Sr(1) atoms. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to eight equivalent Sr(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr5Si3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.461
_cell_length_b   9.461
_cell_length_c   9.461
_cell_angle_alpha   96.783
_cell_angle_beta   96.783
_cell_angle_gamma   139.800
_symmetry_Int_Tables_number   1
_cell_volume   513.329
_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  0.294  0.416  0.709  1.0
  Sr  Sr1  1  0.706  0.584  0.291  1.0
  Sr  Sr2  1  0.416  0.706  0.122  1.0
  Sr  Sr3  1  0.584  0.294  0.878  1.0
  Sr  Sr4  1  0.916  0.794  0.709  1.0
  Sr  Sr5  1  0.206  0.916  0.122  1.0
  Sr  Sr6  1  0.794  0.084  0.878  1.0
  Sr  Sr7  1  0.084  0.206  0.291  1.0
  Sr  Sr8  1  0.750  0.250  0.500  1.0
  Sr  Sr9  1  0.250  0.750  0.500  1.0
  Si  Si10  1  0.846  0.346  0.191  1.0
  Si  Si11  1  0.654  0.846  0.500  1.0
  Si  Si12  1  0.346  0.154  0.500  1.0
  Si  Si13  1  0.154  0.654  0.809  1.0
  Si  Si14  1  0.750  0.750  0.000  1.0
  Si  Si15  1  0.250  0.250  0.000  1.0
[/CIF]
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