The crystal structure described by Li2Cr(PO3)4 crystallizes in the monoclinic Cc space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(8), and one O(9) atom. In the second Li site, Li(2) is bonded in a bent 120 degrees geometry to one O(2) and one O(6) atom. Cr(1) is bonded in a 4-coordinate geometry to one O(1), one O(12), one O(5), and one O(9) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(10), one O(3), one O(5), and one O(6) atom to form corner-sharing PO4 tetrahedra. In the third P site, P(3) is bonded to one O(10), one O(11), one O(8), and one O(9) atom to form corner-sharing PO4 tetrahedra. In the fourth P site, P(4) is bonded to one O(11), one O(12), one O(4), and one O(7) atom to form corner-sharing PO4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Li(1) and one P(4) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Cr(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one Li(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one P(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Li(1) and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Li(1), one Cr(1), and one P(3) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one P(2) and one P(3) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one P(3) and one P(4) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one P(4) atom. is represented by the CIF file [CIF]
data_Li2Cr(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.144
_cell_length_b   8.144
_cell_length_c   8.215
_cell_angle_alpha   83.260
_cell_angle_beta   83.260
_cell_angle_gamma   103.356
_symmetry_Int_Tables_number   1
_cell_volume   520.571
_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
  Li  Li0  1  0.447  0.818  0.933  1.0
  Li  Li1  1  0.818  0.447  0.433  1.0
  Li  Li2  1  0.176  0.548  0.569  1.0
  Li  Li3  1  0.548  0.176  0.069  1.0
  Cr  Cr4  1  0.819  0.108  0.742  1.0
  Cr  Cr5  1  0.108  0.819  0.242  1.0
  P  P6  1  0.926  0.758  0.688  1.0
  P  P7  1  0.758  0.926  0.188  1.0
  P  P8  1  0.821  0.448  0.927  1.0
  P  P9  1  0.448  0.821  0.427  1.0
  P  P10  1  0.492  0.145  0.576  1.0
  P  P11  1  0.145  0.492  0.076  1.0
  P  P12  1  0.176  0.022  0.817  1.0
  P  P13  1  0.022  0.176  0.317  1.0
  O  O14  1  0.833  0.890  0.644  1.0
  O  O15  1  0.970  0.648  0.561  1.0
  O  O16  1  0.890  0.833  0.144  1.0
  O  O17  1  0.648  0.970  0.061  1.0
  O  O18  1  0.814  0.639  0.853  1.0
  O  O19  1  0.639  0.814  0.353  1.0
  O  O20  1  0.277  0.984  0.953  1.0
  O  O21  1  0.781  0.337  0.795  1.0
  O  O22  1  0.984  0.277  0.453  1.0
  O  O23  1  0.394  0.709  0.591  1.0
  O  O24  1  0.337  0.781  0.295  1.0
  O  O25  1  0.709  0.394  0.091  1.0
  O  O26  1  0.103  0.841  0.753  1.0
  O  O27  1  0.322  0.574  0.993  1.0
  O  O28  1  0.841  0.103  0.253  1.0
  O  O29  1  0.574  0.322  0.493  1.0
  O  O30  1  0.568  0.056  0.710  1.0
  O  O31  1  0.024  0.469  0.932  1.0
  O  O32  1  0.056  0.568  0.210  1.0
  O  O33  1  0.469  0.024  0.432  1.0
  O  O34  1  0.298  0.135  0.654  1.0
  O  O35  1  0.135  0.298  0.154  1.0
  O  O36  1  0.037  0.113  0.848  1.0
  O  O37  1  0.113  0.037  0.348  1.0
[/CIF]
.
The crystal structure described by Li2Cr(PO3)4 crystallizes in the monoclinic Cc space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(8), and one O(9) atom. In the second Li site, Li(2) is bonded in a bent 120 degrees geometry to one O(2) and one O(6) atom. Cr(1) is bonded in a 4-coordinate geometry to one O(1), one O(12), one O(5), and one O(9) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(10), one O(3), one O(5), and one O(6) atom to form corner-sharing PO4 tetrahedra. In the third P site, P(3) is bonded to one O(10), one O(11), one O(8), and one O(9) atom to form corner-sharing PO4 tetrahedra. In the fourth P site, P(4) is bonded to one O(11), one O(12), one O(4), and one O(7) atom to form corner-sharing PO4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Li(1) and one P(4) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Cr(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one Li(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one P(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Li(1) and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Li(1), one Cr(1), and one P(3) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one P(2) and one P(3) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one P(3) and one P(4) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one P(4) atom. is represented by the CIF file [CIF]
data_Li2Cr(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.144
_cell_length_b   8.144
_cell_length_c   8.215
_cell_angle_alpha   83.260
_cell_angle_beta   83.260
_cell_angle_gamma   103.356
_symmetry_Int_Tables_number   1
_cell_volume   520.571
_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
  Li  Li0  1  0.447  0.818  0.933  1.0
  Li  Li1  1  0.818  0.447  0.433  1.0
  Li  Li2  1  0.176  0.548  0.569  1.0
  Li  Li3  1  0.548  0.176  0.069  1.0
  Cr  Cr4  1  0.819  0.108  0.742  1.0
  Cr  Cr5  1  0.108  0.819  0.242  1.0
  P  P6  1  0.926  0.758  0.688  1.0
  P  P7  1  0.758  0.926  0.188  1.0
  P  P8  1  0.821  0.448  0.927  1.0
  P  P9  1  0.448  0.821  0.427  1.0
  P  P10  1  0.492  0.145  0.576  1.0
  P  P11  1  0.145  0.492  0.076  1.0
  P  P12  1  0.176  0.022  0.817  1.0
  P  P13  1  0.022  0.176  0.317  1.0
  O  O14  1  0.833  0.890  0.644  1.0
  O  O15  1  0.970  0.648  0.561  1.0
  O  O16  1  0.890  0.833  0.144  1.0
  O  O17  1  0.648  0.970  0.061  1.0
  O  O18  1  0.814  0.639  0.853  1.0
  O  O19  1  0.639  0.814  0.353  1.0
  O  O20  1  0.277  0.984  0.953  1.0
  O  O21  1  0.781  0.337  0.795  1.0
  O  O22  1  0.984  0.277  0.453  1.0
  O  O23  1  0.394  0.709  0.591  1.0
  O  O24  1  0.337  0.781  0.295  1.0
  O  O25  1  0.709  0.394  0.091  1.0
  O  O26  1  0.103  0.841  0.753  1.0
  O  O27  1  0.322  0.574  0.993  1.0
  O  O28  1  0.841  0.103  0.253  1.0
  O  O29  1  0.574  0.322  0.493  1.0
  O  O30  1  0.568  0.056  0.710  1.0
  O  O31  1  0.024  0.469  0.932  1.0
  O  O32  1  0.056  0.568  0.210  1.0
  O  O33  1  0.469  0.024  0.432  1.0
  O  O34  1  0.298  0.135  0.654  1.0
  O  O35  1  0.135  0.298  0.154  1.0
  O  O36  1  0.037  0.113  0.848  1.0
  O  O37  1  0.113  0.037  0.348  1.0
[/CIF]
.