The crystal structure described by Cr7C3 crystallizes in the orthorhombic Pnma space group. There are five inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 3-coordinate geometry to one C(2) and two equivalent C(1) atoms. In the second Cr site, Cr(2) is bonded in a 2-coordinate geometry to one C(1) and one C(2) atom. In the third Cr site, Cr(3) is bonded in a distorted trigonal planar geometry to one C(2) and two equivalent C(1) atoms. In the fourth Cr site, Cr(4) is bonded in a distorted L-shaped geometry to two equivalent C(1) atoms. In the fifth Cr site, Cr(5) is bonded in a 3-coordinate geometry to one C(2) and two equivalent C(1) atoms. There are two inequivalent C sites. In the first C site, C(2) is bonded in a 6-coordinate geometry to one Cr(3), one Cr(5), two equivalent Cr(1), and two equivalent Cr(2) atoms. In the second C site, C(1) is bonded in a 6-coordinate geometry to one Cr(2), one Cr(3), one Cr(4), one Cr(5), and two equivalent Cr(1) atoms. is represented by the CIF card [CIF]
data_Cr7C3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.475
_cell_length_b   6.904
_cell_length_c   11.944
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   369.008
_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
  Cr  Cr0  1  0.056  0.065  0.811  1.0
  Cr  Cr1  1  0.556  0.435  0.689  1.0
  Cr  Cr2  1  0.944  0.565  0.189  1.0
  Cr  Cr3  1  0.444  0.935  0.311  1.0
  Cr  Cr4  1  0.944  0.935  0.189  1.0
  Cr  Cr5  1  0.444  0.565  0.311  1.0
  Cr  Cr6  1  0.056  0.435  0.811  1.0
  Cr  Cr7  1  0.556  0.065  0.689  1.0
  Cr  Cr8  1  0.251  0.066  0.020  1.0
  Cr  Cr9  1  0.751  0.434  0.480  1.0
  Cr  Cr10  1  0.749  0.566  0.980  1.0
  Cr  Cr11  1  0.249  0.934  0.520  1.0
  Cr  Cr12  1  0.749  0.934  0.980  1.0
  Cr  Cr13  1  0.249  0.566  0.520  1.0
  Cr  Cr14  1  0.251  0.434  0.020  1.0
  Cr  Cr15  1  0.751  0.066  0.480  1.0
  Cr  Cr16  1  0.239  0.750  0.917  1.0
  Cr  Cr17  1  0.739  0.750  0.583  1.0
  Cr  Cr18  1  0.761  0.250  0.083  1.0
  Cr  Cr19  1  0.261  0.250  0.417  1.0
  Cr  Cr20  1  0.258  0.750  0.704  1.0
  Cr  Cr21  1  0.758  0.750  0.796  1.0
  Cr  Cr22  1  0.742  0.250  0.296  1.0
  Cr  Cr23  1  0.242  0.250  0.204  1.0
  Cr  Cr24  1  0.445  0.750  0.127  1.0
  Cr  Cr25  1  0.945  0.750  0.373  1.0
  Cr  Cr26  1  0.555  0.250  0.873  1.0
  Cr  Cr27  1  0.055  0.250  0.627  1.0
  C  C28  1  0.534  0.033  0.155  1.0
  C  C29  1  0.034  0.467  0.345  1.0
  C  C30  1  0.466  0.533  0.845  1.0
  C  C31  1  0.966  0.967  0.655  1.0
  C  C32  1  0.466  0.967  0.845  1.0
  C  C33  1  0.966  0.533  0.655  1.0
  C  C34  1  0.534  0.467  0.155  1.0
  C  C35  1  0.034  0.033  0.345  1.0
  C  C36  1  0.035  0.750  0.064  1.0
  C  C37  1  0.535  0.750  0.436  1.0
  C  C38  1  0.965  0.250  0.936  1.0
  C  C39  1  0.465  0.250  0.564  1.0
[/CIF]
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The crystal structure described by Cr7C3 crystallizes in the orthorhombic Pnma space group. There are five inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 3-coordinate geometry to one C(2) and two equivalent C(1) atoms. In the second Cr site, Cr(2) is bonded in a 2-coordinate geometry to one C(1) and one C(2) atom. In the third Cr site, Cr(3) is bonded in a distorted trigonal planar geometry to one C(2) and two equivalent C(1) atoms. In the fourth Cr site, Cr(4) is bonded in a distorted L-shaped geometry to two equivalent C(1) atoms. In the fifth Cr site, Cr(5) is bonded in a 3-coordinate geometry to one C(2) and two equivalent C(1) atoms. There are two inequivalent C sites. In the first C site, C(2) is bonded in a 6-coordinate geometry to one Cr(3), one Cr(5), two equivalent Cr(1), and two equivalent Cr(2) atoms. In the second C site, C(1) is bonded in a 6-coordinate geometry to one Cr(2), one Cr(3), one Cr(4), one Cr(5), and two equivalent Cr(1) atoms. is represented by the CIF card [CIF]
data_Cr7C3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.475
_cell_length_b   6.904
_cell_length_c   11.944
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   369.008
_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
  Cr  Cr0  1  0.056  0.065  0.811  1.0
  Cr  Cr1  1  0.556  0.435  0.689  1.0
  Cr  Cr2  1  0.944  0.565  0.189  1.0
  Cr  Cr3  1  0.444  0.935  0.311  1.0
  Cr  Cr4  1  0.944  0.935  0.189  1.0
  Cr  Cr5  1  0.444  0.565  0.311  1.0
  Cr  Cr6  1  0.056  0.435  0.811  1.0
  Cr  Cr7  1  0.556  0.065  0.689  1.0
  Cr  Cr8  1  0.251  0.066  0.020  1.0
  Cr  Cr9  1  0.751  0.434  0.480  1.0
  Cr  Cr10  1  0.749  0.566  0.980  1.0
  Cr  Cr11  1  0.249  0.934  0.520  1.0
  Cr  Cr12  1  0.749  0.934  0.980  1.0
  Cr  Cr13  1  0.249  0.566  0.520  1.0
  Cr  Cr14  1  0.251  0.434  0.020  1.0
  Cr  Cr15  1  0.751  0.066  0.480  1.0
  Cr  Cr16  1  0.239  0.750  0.917  1.0
  Cr  Cr17  1  0.739  0.750  0.583  1.0
  Cr  Cr18  1  0.761  0.250  0.083  1.0
  Cr  Cr19  1  0.261  0.250  0.417  1.0
  Cr  Cr20  1  0.258  0.750  0.704  1.0
  Cr  Cr21  1  0.758  0.750  0.796  1.0
  Cr  Cr22  1  0.742  0.250  0.296  1.0
  Cr  Cr23  1  0.242  0.250  0.204  1.0
  Cr  Cr24  1  0.445  0.750  0.127  1.0
  Cr  Cr25  1  0.945  0.750  0.373  1.0
  Cr  Cr26  1  0.555  0.250  0.873  1.0
  Cr  Cr27  1  0.055  0.250  0.627  1.0
  C  C28  1  0.534  0.033  0.155  1.0
  C  C29  1  0.034  0.467  0.345  1.0
  C  C30  1  0.466  0.533  0.845  1.0
  C  C31  1  0.966  0.967  0.655  1.0
  C  C32  1  0.466  0.967  0.845  1.0
  C  C33  1  0.966  0.533  0.655  1.0
  C  C34  1  0.534  0.467  0.155  1.0
  C  C35  1  0.034  0.033  0.345  1.0
  C  C36  1  0.035  0.750  0.064  1.0
  C  C37  1  0.535  0.750  0.436  1.0
  C  C38  1  0.965  0.250  0.936  1.0
  C  C39  1  0.465  0.250  0.564  1.0
[/CIF]
.