The crystal structure described by Cr3(PO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(4) atom. In the second Cr site, Cr(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. P(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Cr(1), one Cr(2), and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cr(2) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cr(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Cr(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cr3(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.837
_cell_length_b   7.999
_cell_length_c   10.782
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   98.047
_symmetry_Int_Tables_number   1
_cell_volume   413.083
_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  0.479  0.455  0.818  1.0
  Cr  Cr1  1  0.979  0.955  0.682  1.0
  Cr  Cr2  1  0.521  0.545  0.182  1.0
  Cr  Cr3  1  0.021  0.045  0.318  1.0
  Cr  Cr4  1  0.500  0.500  0.500  1.0
  Cr  Cr5  1  0.000  0.000  0.000  1.0
  P  P6  1  0.056  0.588  0.681  1.0
  P  P7  1  0.556  0.088  0.819  1.0
  P  P8  1  0.944  0.412  0.319  1.0
  P  P9  1  0.444  0.912  0.181  1.0
  O  O10  1  0.724  0.559  0.673  1.0
  O  O11  1  0.224  0.059  0.827  1.0
  O  O12  1  0.276  0.441  0.327  1.0
  O  O13  1  0.776  0.941  0.173  1.0
  O  O14  1  0.172  0.443  0.612  1.0
  O  O15  1  0.672  0.943  0.888  1.0
  O  O16  1  0.828  0.557  0.388  1.0
  O  O17  1  0.328  0.057  0.112  1.0
  O  O18  1  0.163  0.762  0.622  1.0
  O  O19  1  0.663  0.262  0.878  1.0
  O  O20  1  0.837  0.238  0.378  1.0
  O  O21  1  0.337  0.738  0.122  1.0
  O  O22  1  0.148  0.584  0.819  1.0
  O  O23  1  0.648  0.084  0.681  1.0
  O  O24  1  0.852  0.416  0.181  1.0
  O  O25  1  0.352  0.916  0.319  1.0
[/CIF]
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The crystal structure described by Cr3(PO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(4) atom. In the second Cr site, Cr(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. P(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Cr(1), one Cr(2), and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cr(2) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cr(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Cr(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cr3(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.837
_cell_length_b   7.999
_cell_length_c   10.782
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   98.047
_symmetry_Int_Tables_number   1
_cell_volume   413.083
_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  0.479  0.455  0.818  1.0
  Cr  Cr1  1  0.979  0.955  0.682  1.0
  Cr  Cr2  1  0.521  0.545  0.182  1.0
  Cr  Cr3  1  0.021  0.045  0.318  1.0
  Cr  Cr4  1  0.500  0.500  0.500  1.0
  Cr  Cr5  1  0.000  0.000  0.000  1.0
  P  P6  1  0.056  0.588  0.681  1.0
  P  P7  1  0.556  0.088  0.819  1.0
  P  P8  1  0.944  0.412  0.319  1.0
  P  P9  1  0.444  0.912  0.181  1.0
  O  O10  1  0.724  0.559  0.673  1.0
  O  O11  1  0.224  0.059  0.827  1.0
  O  O12  1  0.276  0.441  0.327  1.0
  O  O13  1  0.776  0.941  0.173  1.0
  O  O14  1  0.172  0.443  0.612  1.0
  O  O15  1  0.672  0.943  0.888  1.0
  O  O16  1  0.828  0.557  0.388  1.0
  O  O17  1  0.328  0.057  0.112  1.0
  O  O18  1  0.163  0.762  0.622  1.0
  O  O19  1  0.663  0.262  0.878  1.0
  O  O20  1  0.837  0.238  0.378  1.0
  O  O21  1  0.337  0.738  0.122  1.0
  O  O22  1  0.148  0.584  0.819  1.0
  O  O23  1  0.648  0.084  0.681  1.0
  O  O24  1  0.852  0.416  0.181  1.0
  O  O25  1  0.352  0.916  0.319  1.0
[/CIF]
.