The structure described by Co5(SiN3)2 crystallizes in the tetragonal P-4b2 space group. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 4-coordinate geometry to one N(2), one N(3), and two equivalent N(1) atoms. In the second Co site, Co(2) is bonded in a 4-coordinate geometry to four equivalent N(1) atoms. In the third Co site, Co(3) is bonded in a 3-coordinate geometry to three equivalent N(2) atoms. In the fourth Co site, Co(4) is bonded in a linear geometry to two equivalent N(4) atoms. Si(1) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form corner-sharing SiN4 tetrahedra. There are four inequivalent N sites. In the first N site, N(2) is bonded in a 5-coordinate geometry to one Co(1), three equivalent Co(3), and one Si(1) atom. In the second N site, N(3) is bonded in a 4-coordinate geometry to two equivalent Co(1) and two equivalent Si(1) atoms. In the third N site, N(4) is bonded in a trigonal planar geometry to one Co(4) and two equivalent Si(1) atoms. In the fourth N site, N(1) is bonded in a 4-coordinate geometry to one Co(2), two equivalent Co(1), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Co5(SiN3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.295
_cell_length_b   10.295
_cell_length_c   5.154
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   546.250
_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
  Co  Co0  1  0.314  0.110  0.775  1.0
  Co  Co1  1  0.186  0.610  0.775  1.0
  Co  Co2  1  0.686  0.890  0.775  1.0
  Co  Co3  1  0.814  0.390  0.775  1.0
  Co  Co4  1  0.890  0.314  0.225  1.0
  Co  Co5  1  0.610  0.814  0.225  1.0
  Co  Co6  1  0.110  0.686  0.225  1.0
  Co  Co7  1  0.390  0.186  0.225  1.0
  Co  Co8  1  0.500  0.000  0.000  1.0
  Co  Co9  1  0.000  0.500  0.000  1.0
  Co  Co10  1  0.411  0.423  0.696  1.0
  Co  Co11  1  0.089  0.923  0.696  1.0
  Co  Co12  1  0.589  0.577  0.696  1.0
  Co  Co13  1  0.911  0.077  0.696  1.0
  Co  Co14  1  0.577  0.411  0.304  1.0
  Co  Co15  1  0.923  0.911  0.304  1.0
  Co  Co16  1  0.423  0.589  0.304  1.0
  Co  Co17  1  0.077  0.089  0.304  1.0
  Co  Co18  1  0.500  0.000  0.500  1.0
  Co  Co19  1  0.000  0.500  0.500  1.0
  Si  Si20  1  0.616  0.234  0.760  1.0
  Si  Si21  1  0.884  0.734  0.760  1.0
  Si  Si22  1  0.384  0.766  0.760  1.0
  Si  Si23  1  0.116  0.266  0.760  1.0
  Si  Si24  1  0.766  0.616  0.240  1.0
  Si  Si25  1  0.734  0.116  0.240  1.0
  Si  Si26  1  0.234  0.384  0.240  1.0
  Si  Si27  1  0.266  0.884  0.240  1.0
  N  N28  1  0.473  0.177  0.898  1.0
  N  N29  1  0.027  0.677  0.898  1.0
  N  N30  1  0.527  0.823  0.898  1.0
  N  N31  1  0.973  0.323  0.898  1.0
  N  N32  1  0.823  0.473  0.102  1.0
  N  N33  1  0.677  0.973  0.102  1.0
  N  N34  1  0.177  0.527  0.102  1.0
  N  N35  1  0.323  0.027  0.102  1.0
  N  N36  1  0.634  0.397  0.660  1.0
  N  N37  1  0.866  0.897  0.660  1.0
  N  N38  1  0.366  0.603  0.660  1.0
  N  N39  1  0.134  0.103  0.660  1.0
  N  N40  1  0.603  0.634  0.340  1.0
  N  N41  1  0.897  0.134  0.340  1.0
  N  N42  1  0.397  0.366  0.340  1.0
  N  N43  1  0.103  0.866  0.340  1.0
  N  N44  1  0.229  0.271  0.000  1.0
  N  N45  1  0.271  0.771  0.000  1.0
  N  N46  1  0.771  0.729  0.000  1.0
  N  N47  1  0.729  0.229  0.000  1.0
  N  N48  1  0.631  0.131  0.500  1.0
  N  N49  1  0.869  0.631  0.500  1.0
  N  N50  1  0.369  0.869  0.500  1.0
  N  N51  1  0.131  0.369  0.500  1.0
[/CIF]
.
The structure described by Co5(SiN3)2 crystallizes in the tetragonal P-4b2 space group. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 4-coordinate geometry to one N(2), one N(3), and two equivalent N(1) atoms. In the second Co site, Co(2) is bonded in a 4-coordinate geometry to four equivalent N(1) atoms. In the third Co site, Co(3) is bonded in a 3-coordinate geometry to three equivalent N(2) atoms. In the fourth Co site, Co(4) is bonded in a linear geometry to two equivalent N(4) atoms. Si(1) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form corner-sharing SiN4 tetrahedra. There are four inequivalent N sites. In the first N site, N(2) is bonded in a 5-coordinate geometry to one Co(1), three equivalent Co(3), and one Si(1) atom. In the second N site, N(3) is bonded in a 4-coordinate geometry to two equivalent Co(1) and two equivalent Si(1) atoms. In the third N site, N(4) is bonded in a trigonal planar geometry to one Co(4) and two equivalent Si(1) atoms. In the fourth N site, N(1) is bonded in a 4-coordinate geometry to one Co(2), two equivalent Co(1), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Co5(SiN3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.295
_cell_length_b   10.295
_cell_length_c   5.154
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   546.250
_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
  Co  Co0  1  0.314  0.110  0.775  1.0
  Co  Co1  1  0.186  0.610  0.775  1.0
  Co  Co2  1  0.686  0.890  0.775  1.0
  Co  Co3  1  0.814  0.390  0.775  1.0
  Co  Co4  1  0.890  0.314  0.225  1.0
  Co  Co5  1  0.610  0.814  0.225  1.0
  Co  Co6  1  0.110  0.686  0.225  1.0
  Co  Co7  1  0.390  0.186  0.225  1.0
  Co  Co8  1  0.500  0.000  0.000  1.0
  Co  Co9  1  0.000  0.500  0.000  1.0
  Co  Co10  1  0.411  0.423  0.696  1.0
  Co  Co11  1  0.089  0.923  0.696  1.0
  Co  Co12  1  0.589  0.577  0.696  1.0
  Co  Co13  1  0.911  0.077  0.696  1.0
  Co  Co14  1  0.577  0.411  0.304  1.0
  Co  Co15  1  0.923  0.911  0.304  1.0
  Co  Co16  1  0.423  0.589  0.304  1.0
  Co  Co17  1  0.077  0.089  0.304  1.0
  Co  Co18  1  0.500  0.000  0.500  1.0
  Co  Co19  1  0.000  0.500  0.500  1.0
  Si  Si20  1  0.616  0.234  0.760  1.0
  Si  Si21  1  0.884  0.734  0.760  1.0
  Si  Si22  1  0.384  0.766  0.760  1.0
  Si  Si23  1  0.116  0.266  0.760  1.0
  Si  Si24  1  0.766  0.616  0.240  1.0
  Si  Si25  1  0.734  0.116  0.240  1.0
  Si  Si26  1  0.234  0.384  0.240  1.0
  Si  Si27  1  0.266  0.884  0.240  1.0
  N  N28  1  0.473  0.177  0.898  1.0
  N  N29  1  0.027  0.677  0.898  1.0
  N  N30  1  0.527  0.823  0.898  1.0
  N  N31  1  0.973  0.323  0.898  1.0
  N  N32  1  0.823  0.473  0.102  1.0
  N  N33  1  0.677  0.973  0.102  1.0
  N  N34  1  0.177  0.527  0.102  1.0
  N  N35  1  0.323  0.027  0.102  1.0
  N  N36  1  0.634  0.397  0.660  1.0
  N  N37  1  0.866  0.897  0.660  1.0
  N  N38  1  0.366  0.603  0.660  1.0
  N  N39  1  0.134  0.103  0.660  1.0
  N  N40  1  0.603  0.634  0.340  1.0
  N  N41  1  0.897  0.134  0.340  1.0
  N  N42  1  0.397  0.366  0.340  1.0
  N  N43  1  0.103  0.866  0.340  1.0
  N  N44  1  0.229  0.271  0.000  1.0
  N  N45  1  0.271  0.771  0.000  1.0
  N  N46  1  0.771  0.729  0.000  1.0
  N  N47  1  0.729  0.229  0.000  1.0
  N  N48  1  0.631  0.131  0.500  1.0
  N  N49  1  0.869  0.631  0.500  1.0
  N  N50  1  0.369  0.869  0.500  1.0
  N  N51  1  0.131  0.369  0.500  1.0
[/CIF]
.