The material structure described by Zn5(SiN3)2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent N(1) and two equivalent N(3) atoms to form distorted ZnN4 tetrahedra that share corners with four equivalent Si(1)N4 tetrahedra. In the second Zn site, Zn(2) is bonded in a distorted trigonal planar geometry to one N(3) and two equivalent N(2) atoms. In the third Zn site, Zn(3) is bonded in a 4-coordinate geometry to two equivalent N(1) and two equivalent N(3) atoms. Si(1) is bonded to one N(1), one N(3), and two equivalent N(2) atoms to form SiN4 tetrahedra that share corners with two equivalent Zn(1)N4 tetrahedra and  an edgeedge with one Si(1)N4 tetrahedra. There are three inequivalent N sites. In the first N site, N(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Zn(2) and two equivalent Si(1) atoms. In the second N site, N(3) is bonded in a 5-coordinate geometry to one Zn(1), one Zn(2), two equivalent Zn(3), and one Si(1) atom. In the third N site, N(1) is bonded to one Zn(1), two equivalent Zn(3), and one Si(1) atom to form corner-sharing NZn3Si tetrahedra. is represented by the CIF file [CIF]
data_Zn5(SiN3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.239
_cell_length_b   5.595
_cell_length_c   13.360
_cell_angle_alpha   90.000
_cell_angle_beta   92.220
_cell_angle_gamma   122.278
_symmetry_Int_Tables_number   1
_cell_volume   330.738
_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
  Zn  Zn0  1  0.000  0.543  0.750  1.0
  Zn  Zn1  1  0.000  0.457  0.250  1.0
  Zn  Zn2  1  0.229  0.850  0.038  1.0
  Zn  Zn3  1  0.771  0.621  0.462  1.0
  Zn  Zn4  1  0.771  0.150  0.962  1.0
  Zn  Zn5  1  0.229  0.379  0.538  1.0
  Zn  Zn6  1  0.284  0.210  0.727  1.0
  Zn  Zn7  1  0.716  0.926  0.773  1.0
  Zn  Zn8  1  0.716  0.790  0.273  1.0
  Zn  Zn9  1  0.284  0.074  0.227  1.0
  Si  Si10  1  0.576  0.032  0.593  1.0
  Si  Si11  1  0.424  0.456  0.907  1.0
  Si  Si12  1  0.424  0.968  0.407  1.0
  Si  Si13  1  0.576  0.544  0.093  1.0
  N  N14  1  0.356  0.907  0.697  1.0
  N  N15  1  0.644  0.551  0.803  1.0
  N  N16  1  0.644  0.093  0.303  1.0
  N  N17  1  0.356  0.449  0.197  1.0
  N  N18  1  0.491  0.222  0.503  1.0
  N  N19  1  0.509  0.732  0.997  1.0
  N  N20  1  0.509  0.778  0.497  1.0
  N  N21  1  0.491  0.268  0.003  1.0
  N  N22  1  0.946  0.230  0.641  1.0
  N  N23  1  0.054  0.284  0.859  1.0
  N  N24  1  0.054  0.770  0.359  1.0
  N  N25  1  0.946  0.716  0.141  1.0
[/CIF]
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The material structure described by Zn5(SiN3)2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent N(1) and two equivalent N(3) atoms to form distorted ZnN4 tetrahedra that share corners with four equivalent Si(1)N4 tetrahedra. In the second Zn site, Zn(2) is bonded in a distorted trigonal planar geometry to one N(3) and two equivalent N(2) atoms. In the third Zn site, Zn(3) is bonded in a 4-coordinate geometry to two equivalent N(1) and two equivalent N(3) atoms. Si(1) is bonded to one N(1), one N(3), and two equivalent N(2) atoms to form SiN4 tetrahedra that share corners with two equivalent Zn(1)N4 tetrahedra and  an edgeedge with one Si(1)N4 tetrahedra. There are three inequivalent N sites. In the first N site, N(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Zn(2) and two equivalent Si(1) atoms. In the second N site, N(3) is bonded in a 5-coordinate geometry to one Zn(1), one Zn(2), two equivalent Zn(3), and one Si(1) atom. In the third N site, N(1) is bonded to one Zn(1), two equivalent Zn(3), and one Si(1) atom to form corner-sharing NZn3Si tetrahedra. is represented by the CIF file [CIF]
data_Zn5(SiN3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.239
_cell_length_b   5.595
_cell_length_c   13.360
_cell_angle_alpha   90.000
_cell_angle_beta   92.220
_cell_angle_gamma   122.278
_symmetry_Int_Tables_number   1
_cell_volume   330.738
_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
  Zn  Zn0  1  0.000  0.543  0.750  1.0
  Zn  Zn1  1  0.000  0.457  0.250  1.0
  Zn  Zn2  1  0.229  0.850  0.038  1.0
  Zn  Zn3  1  0.771  0.621  0.462  1.0
  Zn  Zn4  1  0.771  0.150  0.962  1.0
  Zn  Zn5  1  0.229  0.379  0.538  1.0
  Zn  Zn6  1  0.284  0.210  0.727  1.0
  Zn  Zn7  1  0.716  0.926  0.773  1.0
  Zn  Zn8  1  0.716  0.790  0.273  1.0
  Zn  Zn9  1  0.284  0.074  0.227  1.0
  Si  Si10  1  0.576  0.032  0.593  1.0
  Si  Si11  1  0.424  0.456  0.907  1.0
  Si  Si12  1  0.424  0.968  0.407  1.0
  Si  Si13  1  0.576  0.544  0.093  1.0
  N  N14  1  0.356  0.907  0.697  1.0
  N  N15  1  0.644  0.551  0.803  1.0
  N  N16  1  0.644  0.093  0.303  1.0
  N  N17  1  0.356  0.449  0.197  1.0
  N  N18  1  0.491  0.222  0.503  1.0
  N  N19  1  0.509  0.732  0.997  1.0
  N  N20  1  0.509  0.778  0.497  1.0
  N  N21  1  0.491  0.268  0.003  1.0
  N  N22  1  0.946  0.230  0.641  1.0
  N  N23  1  0.054  0.284  0.859  1.0
  N  N24  1  0.054  0.770  0.359  1.0
  N  N25  1  0.946  0.716  0.141  1.0
[/CIF]
.