The structure described by Li2NiP3O10 crystallizes in the monoclinic P2_1/m space group. Li(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form LiO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and edges with two equivalent Li(1)O6 octahedra. Ni(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(5) atoms. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(6), one O(7), and two equivalent O(1) atoms to form PO4 tetrahedra that share corners with two equivalent Li(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. In the second P site, P(2) is bonded to one O(4), one O(7), and two equivalent O(3) atoms to form PO4 tetrahedra that share corners with six equivalent Li(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-59°. In the third P site, P(3) is bonded to one O(2), one O(6), and two equivalent O(5) atoms to form PO4 tetrahedra that share corners with four equivalent Li(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-63°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(1), one Ni(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Li(1) and one P(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Li(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to two equivalent Li(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Li(1), one Ni(1), and one P(3) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. is represented by the CIF card [CIF]
data_Li2NiP3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.553
_cell_length_b   4.691
_cell_length_c   9.241
_cell_angle_alpha   81.857
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   367.053
_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  0.924  0.979  0.345  1.0
  Li  Li1  1  0.576  0.979  0.345  1.0
  Li  Li2  1  0.424  0.021  0.655  1.0
  Li  Li3  1  0.076  0.021  0.655  1.0
  Ni  Ni4  1  0.000  0.000  0.000  1.0
  Ni  Ni5  1  0.500  0.000  0.000  1.0
  P  P6  1  0.750  0.678  0.830  1.0
  P  P7  1  0.250  0.585  0.460  1.0
  P  P8  1  0.250  0.465  0.859  1.0
  P  P9  1  0.750  0.535  0.141  1.0
  P  P10  1  0.750  0.415  0.540  1.0
  P  P11  1  0.250  0.322  0.170  1.0
  O  O12  1  0.901  0.850  0.828  1.0
  O  O13  1  0.599  0.850  0.828  1.0
  O  O14  1  0.250  0.747  0.761  1.0
  O  O15  1  0.396  0.770  0.471  1.0
  O  O16  1  0.104  0.770  0.471  1.0
  O  O17  1  0.750  0.702  0.443  1.0
  O  O18  1  0.601  0.718  0.146  1.0
  O  O19  1  0.899  0.718  0.146  1.0
  O  O20  1  0.750  0.435  0.974  1.0
  O  O21  1  0.250  0.520  0.291  1.0
  O  O22  1  0.750  0.480  0.709  1.0
  O  O23  1  0.250  0.565  0.026  1.0
  O  O24  1  0.101  0.282  0.854  1.0
  O  O25  1  0.399  0.282  0.854  1.0
  O  O26  1  0.250  0.298  0.557  1.0
  O  O27  1  0.896  0.230  0.529  1.0
  O  O28  1  0.604  0.230  0.529  1.0
  O  O29  1  0.750  0.253  0.239  1.0
  O  O30  1  0.401  0.150  0.172  1.0
  O  O31  1  0.099  0.150  0.172  1.0
[/CIF]
.
The structure described by Li2NiP3O10 crystallizes in the monoclinic P2_1/m space group. Li(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form LiO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and edges with two equivalent Li(1)O6 octahedra. Ni(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(5) atoms. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(6), one O(7), and two equivalent O(1) atoms to form PO4 tetrahedra that share corners with two equivalent Li(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. In the second P site, P(2) is bonded to one O(4), one O(7), and two equivalent O(3) atoms to form PO4 tetrahedra that share corners with six equivalent Li(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-59°. In the third P site, P(3) is bonded to one O(2), one O(6), and two equivalent O(5) atoms to form PO4 tetrahedra that share corners with four equivalent Li(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-63°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(1), one Ni(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Li(1) and one P(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Li(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to two equivalent Li(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Li(1), one Ni(1), and one P(3) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. is represented by the CIF card [CIF]
data_Li2NiP3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.553
_cell_length_b   4.691
_cell_length_c   9.241
_cell_angle_alpha   81.857
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   367.053
_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  0.924  0.979  0.345  1.0
  Li  Li1  1  0.576  0.979  0.345  1.0
  Li  Li2  1  0.424  0.021  0.655  1.0
  Li  Li3  1  0.076  0.021  0.655  1.0
  Ni  Ni4  1  0.000  0.000  0.000  1.0
  Ni  Ni5  1  0.500  0.000  0.000  1.0
  P  P6  1  0.750  0.678  0.830  1.0
  P  P7  1  0.250  0.585  0.460  1.0
  P  P8  1  0.250  0.465  0.859  1.0
  P  P9  1  0.750  0.535  0.141  1.0
  P  P10  1  0.750  0.415  0.540  1.0
  P  P11  1  0.250  0.322  0.170  1.0
  O  O12  1  0.901  0.850  0.828  1.0
  O  O13  1  0.599  0.850  0.828  1.0
  O  O14  1  0.250  0.747  0.761  1.0
  O  O15  1  0.396  0.770  0.471  1.0
  O  O16  1  0.104  0.770  0.471  1.0
  O  O17  1  0.750  0.702  0.443  1.0
  O  O18  1  0.601  0.718  0.146  1.0
  O  O19  1  0.899  0.718  0.146  1.0
  O  O20  1  0.750  0.435  0.974  1.0
  O  O21  1  0.250  0.520  0.291  1.0
  O  O22  1  0.750  0.480  0.709  1.0
  O  O23  1  0.250  0.565  0.026  1.0
  O  O24  1  0.101  0.282  0.854  1.0
  O  O25  1  0.399  0.282  0.854  1.0
  O  O26  1  0.250  0.298  0.557  1.0
  O  O27  1  0.896  0.230  0.529  1.0
  O  O28  1  0.604  0.230  0.529  1.0
  O  O29  1  0.750  0.253  0.239  1.0
  O  O30  1  0.401  0.150  0.172  1.0
  O  O31  1  0.099  0.150  0.172  1.0
[/CIF]
.