The material described by Cr2Pb3N4 crystallizes in the monoclinic C2/c space group. Cr(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form a mixture of corner and edge-sharing CrN4 tetrahedra. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 3-coordinate geometry to one N(2) and two equivalent N(1) atoms. In the second Pb site, Pb(2) is bonded in a bent 150 degrees geometry to two equivalent N(2) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted L-shaped geometry to two equivalent Cr(1) and two equivalent Pb(1) atoms. In the second N site, N(2) is bonded in a distorted linear geometry to two equivalent Cr(1), one Pb(1), and one Pb(2) atom. is represented by the CIF file [CIF]
data_Cr2Pb3N4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.468
_cell_length_b   9.075
_cell_length_c   5.892
_cell_angle_alpha   90.000
_cell_angle_beta   95.865
_cell_angle_gamma   127.414
_symmetry_Int_Tables_number   1
_cell_volume   314.542
_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
  Cr  Cr0  1  0.535  0.155  0.514  1.0
  Cr  Cr1  1  0.465  0.620  0.986  1.0
  Cr  Cr2  1  0.465  0.845  0.486  1.0
  Cr  Cr3  1  0.535  0.380  0.014  1.0
  Pb  Pb4  1  0.165  0.938  0.042  1.0
  Pb  Pb5  1  0.835  0.773  0.458  1.0
  Pb  Pb6  1  0.835  0.062  0.958  1.0
  Pb  Pb7  1  0.165  0.227  0.542  1.0
  Pb  Pb8  1  0.000  0.565  0.750  1.0
  Pb  Pb9  1  0.000  0.435  0.250  1.0
  N  N10  1  0.277  0.915  0.449  1.0
  N  N11  1  0.723  0.637  0.051  1.0
  N  N12  1  0.723  0.085  0.551  1.0
  N  N13  1  0.277  0.363  0.949  1.0
  N  N14  1  0.551  0.273  0.768  1.0
  N  N15  1  0.449  0.723  0.732  1.0
  N  N16  1  0.449  0.727  0.232  1.0
  N  N17  1  0.551  0.277  0.268  1.0
[/CIF]
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The material described by Cr2Pb3N4 crystallizes in the monoclinic C2/c space group. Cr(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form a mixture of corner and edge-sharing CrN4 tetrahedra. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 3-coordinate geometry to one N(2) and two equivalent N(1) atoms. In the second Pb site, Pb(2) is bonded in a bent 150 degrees geometry to two equivalent N(2) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted L-shaped geometry to two equivalent Cr(1) and two equivalent Pb(1) atoms. In the second N site, N(2) is bonded in a distorted linear geometry to two equivalent Cr(1), one Pb(1), and one Pb(2) atom. is represented by the CIF file [CIF]
data_Cr2Pb3N4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.468
_cell_length_b   9.075
_cell_length_c   5.892
_cell_angle_alpha   90.000
_cell_angle_beta   95.865
_cell_angle_gamma   127.414
_symmetry_Int_Tables_number   1
_cell_volume   314.542
_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
  Cr  Cr0  1  0.535  0.155  0.514  1.0
  Cr  Cr1  1  0.465  0.620  0.986  1.0
  Cr  Cr2  1  0.465  0.845  0.486  1.0
  Cr  Cr3  1  0.535  0.380  0.014  1.0
  Pb  Pb4  1  0.165  0.938  0.042  1.0
  Pb  Pb5  1  0.835  0.773  0.458  1.0
  Pb  Pb6  1  0.835  0.062  0.958  1.0
  Pb  Pb7  1  0.165  0.227  0.542  1.0
  Pb  Pb8  1  0.000  0.565  0.750  1.0
  Pb  Pb9  1  0.000  0.435  0.250  1.0
  N  N10  1  0.277  0.915  0.449  1.0
  N  N11  1  0.723  0.637  0.051  1.0
  N  N12  1  0.723  0.085  0.551  1.0
  N  N13  1  0.277  0.363  0.949  1.0
  N  N14  1  0.551  0.273  0.768  1.0
  N  N15  1  0.449  0.723  0.732  1.0
  N  N16  1  0.449  0.727  0.232  1.0
  N  N17  1  0.551  0.277  0.268  1.0
[/CIF]
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