The structure described by Cr12P7 crystallizes in the monoclinic Pm space group. There are twelve inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 5-coordinate geometry to one P(2), two equivalent P(5), and two equivalent P(7) atoms. In the second Cr site, Cr(2) is bonded in a 5-coordinate geometry to one P(3), two equivalent P(5), and two equivalent P(6) atoms. In the third Cr site, Cr(3) is bonded in a 5-coordinate geometry to one P(4), two equivalent P(6), and two equivalent P(7) atoms. In the fourth Cr site, Cr(4) is bonded in a 4-coordinate geometry to one P(1), one P(4), and two equivalent P(5) atoms. In the fifth Cr site, Cr(5) is bonded in a 4-coordinate geometry to one P(1), one P(2), and two equivalent P(6) atoms. In the sixth Cr site, Cr(6) is bonded in a 4-coordinate geometry to one P(1), one P(3), and two equivalent P(7) atoms. In the seventh Cr site, Cr(7) is bonded in a 5-coordinate geometry to one P(6), two equivalent P(2), and two equivalent P(4) atoms. In the eighth Cr site, Cr(8) is bonded in a 5-coordinate geometry to one P(7), two equivalent P(2), and two equivalent P(3) atoms. In the ninth Cr site, Cr(9) is bonded in a 5-coordinate geometry to one P(5), two equivalent P(3), and two equivalent P(4) atoms. In the tenth Cr site, Cr(10) is bonded in a 5-coordinate geometry to one P(7), two equivalent P(1), and two equivalent P(4) atoms. In the eleventh Cr site, Cr(11) is bonded in a 5-coordinate geometry to one P(5), two equivalent P(1), and two equivalent P(2) atoms. In the twelfth Cr site, Cr(12) is bonded in a 5-coordinate geometry to one P(6), two equivalent P(1), and two equivalent P(3) atoms. There are seven inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to one Cr(4), one Cr(5), one Cr(6), two equivalent Cr(10), two equivalent Cr(11), and two equivalent Cr(12) atoms. In the second P site, P(2) is bonded in a 8-coordinate geometry to one Cr(1), one Cr(5), two equivalent Cr(11), two equivalent Cr(7), and two equivalent Cr(8) atoms. In the third P site, P(3) is bonded in a 8-coordinate geometry to one Cr(2), one Cr(6), two equivalent Cr(12), two equivalent Cr(8), and two equivalent Cr(9) atoms. In the fourth P site, P(4) is bonded in a 8-coordinate geometry to one Cr(3), one Cr(4), two equivalent Cr(10), two equivalent Cr(7), and two equivalent Cr(9) atoms. In the fifth P site, P(5) is bonded in a 8-coordinate geometry to one Cr(11), one Cr(9), two equivalent Cr(1), two equivalent Cr(2), and two equivalent Cr(4) atoms. In the sixth P site, P(6) is bonded in a 8-coordinate geometry to one Cr(12), one Cr(7), two equivalent Cr(2), two equivalent Cr(3), and two equivalent Cr(5) atoms. In the seventh P site, P(7) is bonded in a 8-coordinate geometry to one Cr(10), one Cr(8), two equivalent Cr(1), two equivalent Cr(3), and two equivalent Cr(6) atoms. is represented by the CIF file [CIF]
data_Cr12P7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.992
_cell_length_b   8.955
_cell_length_c   3.459
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.951
_symmetry_Int_Tables_number   1
_cell_volume   241.314
_cell_formula_units_Z   1
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  0.369  0.507  0.000  1.0
  Cr  Cr1  1  0.138  0.630  0.000  1.0
  Cr  Cr2  1  0.493  0.864  0.000  1.0
  Cr  Cr3  1  0.018  0.273  0.000  1.0
  Cr  Cr4  1  0.255  0.983  0.000  1.0
  Cr  Cr5  1  0.727  0.746  0.000  1.0
  Cr  Cr6  1  0.511  0.136  0.500  1.0
  Cr  Cr7  1  0.630  0.490  0.500  1.0
  Cr  Cr8  1  0.861  0.371  0.500  1.0
  Cr  Cr9  1  0.789  0.003  0.500  1.0
  Cr  Cr10  1  0.211  0.204  0.500  1.0
  Cr  Cr11  1  0.995  0.793  0.500  1.0
  P  P12  1  0.999  0.001  0.000  1.0
  P  P13  1  0.443  0.289  0.000  1.0
  P  P14  1  0.849  0.560  0.000  1.0
  P  P15  1  0.713  0.153  0.000  1.0
  P  P16  1  0.169  0.462  0.500  1.0
  P  P17  1  0.294  0.830  0.500  1.0
  P  P18  1  0.534  0.706  0.500  1.0
[/CIF]
.
The structure described by Cr12P7 crystallizes in the monoclinic Pm space group. There are twelve inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 5-coordinate geometry to one P(2), two equivalent P(5), and two equivalent P(7) atoms. In the second Cr site, Cr(2) is bonded in a 5-coordinate geometry to one P(3), two equivalent P(5), and two equivalent P(6) atoms. In the third Cr site, Cr(3) is bonded in a 5-coordinate geometry to one P(4), two equivalent P(6), and two equivalent P(7) atoms. In the fourth Cr site, Cr(4) is bonded in a 4-coordinate geometry to one P(1), one P(4), and two equivalent P(5) atoms. In the fifth Cr site, Cr(5) is bonded in a 4-coordinate geometry to one P(1), one P(2), and two equivalent P(6) atoms. In the sixth Cr site, Cr(6) is bonded in a 4-coordinate geometry to one P(1), one P(3), and two equivalent P(7) atoms. In the seventh Cr site, Cr(7) is bonded in a 5-coordinate geometry to one P(6), two equivalent P(2), and two equivalent P(4) atoms. In the eighth Cr site, Cr(8) is bonded in a 5-coordinate geometry to one P(7), two equivalent P(2), and two equivalent P(3) atoms. In the ninth Cr site, Cr(9) is bonded in a 5-coordinate geometry to one P(5), two equivalent P(3), and two equivalent P(4) atoms. In the tenth Cr site, Cr(10) is bonded in a 5-coordinate geometry to one P(7), two equivalent P(1), and two equivalent P(4) atoms. In the eleventh Cr site, Cr(11) is bonded in a 5-coordinate geometry to one P(5), two equivalent P(1), and two equivalent P(2) atoms. In the twelfth Cr site, Cr(12) is bonded in a 5-coordinate geometry to one P(6), two equivalent P(1), and two equivalent P(3) atoms. There are seven inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to one Cr(4), one Cr(5), one Cr(6), two equivalent Cr(10), two equivalent Cr(11), and two equivalent Cr(12) atoms. In the second P site, P(2) is bonded in a 8-coordinate geometry to one Cr(1), one Cr(5), two equivalent Cr(11), two equivalent Cr(7), and two equivalent Cr(8) atoms. In the third P site, P(3) is bonded in a 8-coordinate geometry to one Cr(2), one Cr(6), two equivalent Cr(12), two equivalent Cr(8), and two equivalent Cr(9) atoms. In the fourth P site, P(4) is bonded in a 8-coordinate geometry to one Cr(3), one Cr(4), two equivalent Cr(10), two equivalent Cr(7), and two equivalent Cr(9) atoms. In the fifth P site, P(5) is bonded in a 8-coordinate geometry to one Cr(11), one Cr(9), two equivalent Cr(1), two equivalent Cr(2), and two equivalent Cr(4) atoms. In the sixth P site, P(6) is bonded in a 8-coordinate geometry to one Cr(12), one Cr(7), two equivalent Cr(2), two equivalent Cr(3), and two equivalent Cr(5) atoms. In the seventh P site, P(7) is bonded in a 8-coordinate geometry to one Cr(10), one Cr(8), two equivalent Cr(1), two equivalent Cr(3), and two equivalent Cr(6) atoms. is represented by the CIF file [CIF]
data_Cr12P7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.992
_cell_length_b   8.955
_cell_length_c   3.459
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.951
_symmetry_Int_Tables_number   1
_cell_volume   241.314
_cell_formula_units_Z   1
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  0.369  0.507  0.000  1.0
  Cr  Cr1  1  0.138  0.630  0.000  1.0
  Cr  Cr2  1  0.493  0.864  0.000  1.0
  Cr  Cr3  1  0.018  0.273  0.000  1.0
  Cr  Cr4  1  0.255  0.983  0.000  1.0
  Cr  Cr5  1  0.727  0.746  0.000  1.0
  Cr  Cr6  1  0.511  0.136  0.500  1.0
  Cr  Cr7  1  0.630  0.490  0.500  1.0
  Cr  Cr8  1  0.861  0.371  0.500  1.0
  Cr  Cr9  1  0.789  0.003  0.500  1.0
  Cr  Cr10  1  0.211  0.204  0.500  1.0
  Cr  Cr11  1  0.995  0.793  0.500  1.0
  P  P12  1  0.999  0.001  0.000  1.0
  P  P13  1  0.443  0.289  0.000  1.0
  P  P14  1  0.849  0.560  0.000  1.0
  P  P15  1  0.713  0.153  0.000  1.0
  P  P16  1  0.169  0.462  0.500  1.0
  P  P17  1  0.294  0.830  0.500  1.0
  P  P18  1  0.534  0.706  0.500  1.0
[/CIF]
.