The material described by Cr2P crystallizes in the orthorhombic Imm2 space group. There are six inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one P(2), one P(3), and two equivalent P(1) atoms to form distorted CrP4 tetrahedra that share corners with two equivalent Cr(3)P5 square pyramids, corners with two equivalent Cr(1)P4 tetrahedra, corners with eight equivalent Cr(2)P4 tetrahedra, edges with two equivalent Cr(3)P5 square pyramids, and edges with two equivalent Cr(2)P4 tetrahedra. In the second Cr site, Cr(2) is bonded to one P(2), one P(3), and two equivalent P(1) atoms to form distorted CrP4 tetrahedra that share corners with two equivalent Cr(3)P5 square pyramids, corners with four equivalent Cr(1)P4 tetrahedra, corners with six equivalent Cr(2)P4 tetrahedra, edges with two equivalent Cr(3)P5 square pyramids,  an edgeedge with one Cr(1)P4 tetrahedra, and  an edgeedge with one Cr(2)P4 tetrahedra. In the third Cr site, Cr(3) is bonded to one P(2) and four equivalent P(1) atoms to form distorted CrP5 square pyramids that share corners with five equivalent Cr(3)P5 square pyramids, corners with two equivalent Cr(1)P4 tetrahedra, corners with four equivalent Cr(2)P4 tetrahedra, edges with two equivalent Cr(1)P4 tetrahedra, and edges with four equivalent Cr(2)P4 tetrahedra. In the fourth Cr site, Cr(4) is bonded in a 3-coordinate geometry to one P(3) and four equivalent P(1) atoms. In the fifth Cr site, Cr(5) is bonded in a distorted square co-planar geometry to four equivalent P(1) atoms. In the sixth Cr site, Cr(6) is bonded in a 5-coordinate geometry to one P(3) and four equivalent P(1) atoms. There are three inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to one Cr(1), one Cr(5), one Cr(6), two equivalent Cr(2), two equivalent Cr(3), and two equivalent Cr(4) atoms. In the second P site, P(2) is bonded in a 8-coordinate geometry to two equivalent Cr(1), two equivalent Cr(3), and four equivalent Cr(2) atoms. In the third P site, P(3) is bonded in a 9-coordinate geometry to one Cr(6), two equivalent Cr(1), two equivalent Cr(4), and four equivalent Cr(2) atoms. is represented by the CIF file [CIF]
data_Cr2P
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.843
_cell_length_b   6.843
_cell_length_c   6.843
_cell_angle_alpha   124.870
_cell_angle_beta   122.804
_cell_angle_gamma   83.484
_symmetry_Int_Tables_number   1
_cell_volume   211.877
_cell_formula_units_Z   6
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  0.795  0.258  0.053  1.0
  Cr  Cr1  1  0.205  0.258  0.463  1.0
  Cr  Cr2  1  0.834  0.998  0.581  1.0
  Cr  Cr3  1  0.166  0.747  0.164  1.0
  Cr  Cr4  1  0.417  0.998  0.164  1.0
  Cr  Cr5  1  0.583  0.747  0.581  1.0
  Cr  Cr6  1  0.712  0.445  0.733  1.0
  Cr  Cr7  1  0.288  0.021  0.733  1.0
  Cr  Cr8  1  0.215  0.364  0.149  1.0
  Cr  Cr9  1  0.785  0.934  0.149  1.0
  Cr  Cr10  1  0.500  0.549  0.049  1.0
  Cr  Cr11  1  0.000  0.627  0.627  1.0
  P  P12  1  0.393  0.666  0.728  1.0
  P  P13  1  0.607  0.336  0.273  1.0
  P  P14  1  0.937  0.666  0.273  1.0
  P  P15  1  0.063  0.336  0.728  1.0
  P  P16  1  0.500  0.080  0.580  1.0
  P  P17  1  0.000  0.974  0.974  1.0
[/CIF]
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The material described by Cr2P crystallizes in the orthorhombic Imm2 space group. There are six inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one P(2), one P(3), and two equivalent P(1) atoms to form distorted CrP4 tetrahedra that share corners with two equivalent Cr(3)P5 square pyramids, corners with two equivalent Cr(1)P4 tetrahedra, corners with eight equivalent Cr(2)P4 tetrahedra, edges with two equivalent Cr(3)P5 square pyramids, and edges with two equivalent Cr(2)P4 tetrahedra. In the second Cr site, Cr(2) is bonded to one P(2), one P(3), and two equivalent P(1) atoms to form distorted CrP4 tetrahedra that share corners with two equivalent Cr(3)P5 square pyramids, corners with four equivalent Cr(1)P4 tetrahedra, corners with six equivalent Cr(2)P4 tetrahedra, edges with two equivalent Cr(3)P5 square pyramids,  an edgeedge with one Cr(1)P4 tetrahedra, and  an edgeedge with one Cr(2)P4 tetrahedra. In the third Cr site, Cr(3) is bonded to one P(2) and four equivalent P(1) atoms to form distorted CrP5 square pyramids that share corners with five equivalent Cr(3)P5 square pyramids, corners with two equivalent Cr(1)P4 tetrahedra, corners with four equivalent Cr(2)P4 tetrahedra, edges with two equivalent Cr(1)P4 tetrahedra, and edges with four equivalent Cr(2)P4 tetrahedra. In the fourth Cr site, Cr(4) is bonded in a 3-coordinate geometry to one P(3) and four equivalent P(1) atoms. In the fifth Cr site, Cr(5) is bonded in a distorted square co-planar geometry to four equivalent P(1) atoms. In the sixth Cr site, Cr(6) is bonded in a 5-coordinate geometry to one P(3) and four equivalent P(1) atoms. There are three inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to one Cr(1), one Cr(5), one Cr(6), two equivalent Cr(2), two equivalent Cr(3), and two equivalent Cr(4) atoms. In the second P site, P(2) is bonded in a 8-coordinate geometry to two equivalent Cr(1), two equivalent Cr(3), and four equivalent Cr(2) atoms. In the third P site, P(3) is bonded in a 9-coordinate geometry to one Cr(6), two equivalent Cr(1), two equivalent Cr(4), and four equivalent Cr(2) atoms. is represented by the CIF file [CIF]
data_Cr2P
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.843
_cell_length_b   6.843
_cell_length_c   6.843
_cell_angle_alpha   124.870
_cell_angle_beta   122.804
_cell_angle_gamma   83.484
_symmetry_Int_Tables_number   1
_cell_volume   211.877
_cell_formula_units_Z   6
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  0.795  0.258  0.053  1.0
  Cr  Cr1  1  0.205  0.258  0.463  1.0
  Cr  Cr2  1  0.834  0.998  0.581  1.0
  Cr  Cr3  1  0.166  0.747  0.164  1.0
  Cr  Cr4  1  0.417  0.998  0.164  1.0
  Cr  Cr5  1  0.583  0.747  0.581  1.0
  Cr  Cr6  1  0.712  0.445  0.733  1.0
  Cr  Cr7  1  0.288  0.021  0.733  1.0
  Cr  Cr8  1  0.215  0.364  0.149  1.0
  Cr  Cr9  1  0.785  0.934  0.149  1.0
  Cr  Cr10  1  0.500  0.549  0.049  1.0
  Cr  Cr11  1  0.000  0.627  0.627  1.0
  P  P12  1  0.393  0.666  0.728  1.0
  P  P13  1  0.607  0.336  0.273  1.0
  P  P14  1  0.937  0.666  0.273  1.0
  P  P15  1  0.063  0.336  0.728  1.0
  P  P16  1  0.500  0.080  0.580  1.0
  P  P17  1  0.000  0.974  0.974  1.0
[/CIF]
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