The crystal structure described by Li2Co2P2O9 crystallizes in the triclinic P-1 space group. Li(1) is bonded in a trigonal non-coplanar geometry to one O(1) and two equivalent O(3) atoms. Co(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form PO4 tetrahedra that share corners with three equivalent Co(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Li(1), one Co(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Co(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Li(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent Co(1) atoms. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Co(1) and one P(1) atom. is represented by the CIF file [CIF]
data_Li2Co2P2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.837
_cell_length_b   7.167
_cell_length_c   7.177
_cell_angle_alpha   69.454
_cell_angle_beta   77.058
_cell_angle_gamma   76.378
_symmetry_Int_Tables_number   1
_cell_volume   223.718
_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
  Li  Li0  1  0.341  0.868  0.511  1.0
  Li  Li1  1  0.659  0.132  0.489  1.0
  Co  Co2  1  0.800  0.242  1.000  1.0
  Co  Co3  1  0.200  0.758  0.000  1.0
  P  P4  1  0.815  0.692  0.747  1.0
  P  P5  1  0.185  0.308  0.253  1.0
  O  O6  1  0.124  0.718  0.762  1.0
  O  O7  1  0.395  0.250  0.076  1.0
  O  O8  1  0.260  0.168  0.458  1.0
  O  O9  1  0.000  0.000  0.000  1.0
  O  O10  1  0.823  0.466  0.771  1.0
  O  O11  1  0.177  0.534  0.229  1.0
  O  O12  1  0.740  0.832  0.542  1.0
  O  O13  1  0.605  0.750  0.924  1.0
  O  O14  1  0.876  0.282  0.238  1.0
[/CIF]
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The crystal structure described by Li2Co2P2O9 crystallizes in the triclinic P-1 space group. Li(1) is bonded in a trigonal non-coplanar geometry to one O(1) and two equivalent O(3) atoms. Co(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form PO4 tetrahedra that share corners with three equivalent Co(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Li(1), one Co(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Co(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Li(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent Co(1) atoms. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Co(1) and one P(1) atom. is represented by the CIF file [CIF]
data_Li2Co2P2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.837
_cell_length_b   7.167
_cell_length_c   7.177
_cell_angle_alpha   69.454
_cell_angle_beta   77.058
_cell_angle_gamma   76.378
_symmetry_Int_Tables_number   1
_cell_volume   223.718
_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
  Li  Li0  1  0.341  0.868  0.511  1.0
  Li  Li1  1  0.659  0.132  0.489  1.0
  Co  Co2  1  0.800  0.242  1.000  1.0
  Co  Co3  1  0.200  0.758  0.000  1.0
  P  P4  1  0.815  0.692  0.747  1.0
  P  P5  1  0.185  0.308  0.253  1.0
  O  O6  1  0.124  0.718  0.762  1.0
  O  O7  1  0.395  0.250  0.076  1.0
  O  O8  1  0.260  0.168  0.458  1.0
  O  O9  1  0.000  0.000  0.000  1.0
  O  O10  1  0.823  0.466  0.771  1.0
  O  O11  1  0.177  0.534  0.229  1.0
  O  O12  1  0.740  0.832  0.542  1.0
  O  O13  1  0.605  0.750  0.924  1.0
  O  O14  1  0.876  0.282  0.238  1.0
[/CIF]
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