The material structure described by Li4Cu(PO4)2 crystallizes in the triclinic P1 space group. There are eight inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(12), one O(16), one O(3), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(10), one O(13), one O(14), and one O(15) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(1), one O(13), one O(4), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Cu(1)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(11), one O(6), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent Cu(2)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(12), one O(14), one O(3), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. In the sixth Li site, Li(6) is bonded to one O(15), one O(4), one O(7), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Cu(1)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the seventh Li site, Li(7) is bonded to one O(10), one O(15), one O(16), and one O(2) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Cu(1)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the eighth Li site, Li(8) is bonded to one O(12), one O(14), one O(16), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(2), one O(4), and one O(9) atom to form CuO4 tetrahedra that share  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the second Cu site, Cu(2) is bonded to one O(11), one O(5), one O(6), and one O(9) atom to form CuO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Cu(1)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(14), one O(16), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Li(8)O4 tetrahedra. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Cu(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, and corners with two equivalent Cu(2)O4 tetrahedra. In the third P site, P(3) is bonded to one O(12), one O(13), one O(15), and one O(2) atom to form PO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Cu(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Li(7)O4 tetrahedra. In the fourth P site, P(4) is bonded to one O(1), one O(10), one O(7), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, and corners with two equivalent Cu(1)O4 tetrahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(3), one Cu(1), and one P(4) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Li(7), one Cu(1), and one P(3) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(1), one Li(5), and one P(1) atom. In the fourth O site, O(4) is bonded to one Li(3), one Li(6), one Cu(1), and one P(2) atom to form distorted OLi2CuP tetrahedra that share  a cornercorner with one O(6)Li2CuP tetrahedra,  a cornercorner with one O(15)Li3P tetrahedra, corners with two equivalent O(7)Li3P tetrahedra, and corners with two equivalent O(9)LiCu2P tetrahedra. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(1), one Cu(2), and one P(2) atom. In the sixth O site, O(6) is bonded to one Li(4), one Li(8), one Cu(2), and one P(2) atom to form distorted OLi2CuP tetrahedra that share  a cornercorner with one O(4)Li2CuP tetrahedra,  a cornercorner with one O(12)Li3P tetrahedra,  a cornercorner with one O(14)Li3P tetrahedra,  a cornercorner with one O(16)Li3P tetrahedra,  a cornercorner with one O(7)Li3P tetrahedra, and  a cornercorner with one O(9)LiCu2P tetrahedra. In the seventh O site, O(7) is bonded to one Li(3), one Li(4), one Li(6), and one P(4) atom to form OLi3P tetrahedra that share  a cornercorner with one O(6)Li2CuP tetrahedra,  a cornercorner with one O(15)Li3P tetrahedra, corners with two equivalent O(4)Li2CuP tetrahedra, and corners with two equivalent O(9)LiCu2P tetrahedra. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Li(4), one Li(5), and one P(2) atom. In the ninth O site, O(9) is bonded to one Li(6), one Cu(1), one Cu(2), and one P(4) atom to form OLiCu2P tetrahedra that share  a cornercorner with one O(6)Li2CuP tetrahedra,  a cornercorner with one O(15)Li3P tetrahedra, corners with two equivalent O(4)Li2CuP tetrahedra, and corners with two equivalent O(7)Li3P tetrahedra. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Li(2), one Li(7), and one P(4) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Li(4), one Cu(2), and one P(1) atom. In the twelfth O site, O(12) is bonded to one Li(1), one Li(5), one Li(8), and one P(3) atom to form OLi3P tetrahedra that share  a cornercorner with one O(6)Li2CuP tetrahedra,  a cornercorner with one O(15)Li3P tetrahedra, corners with two equivalent O(14)Li3P tetrahedra, and corners with two equivalent O(16)Li3P tetrahedra. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Li(2), one Li(3), and one P(3) atom. In the fourteenth O site, O(14) is bonded to one Li(2), one Li(5), one Li(8), and one P(1) atom to form distorted OLi3P tetrahedra that share  a cornercorner with one O(6)Li2CuP tetrahedra,  a cornercorner with one O(15)Li3P tetrahedra, corners with two equivalent O(12)Li3P tetrahedra, and corners with two equivalent O(16)Li3P tetrahedra. In the fifteenth O site, O(15) is bonded to one Li(2), one Li(6), one Li(7), and one P(3) atom to form OLi3P tetrahedra that share  a cornercorner with one O(4)Li2CuP tetrahedra,  a cornercorner with one O(12)Li3P tetrahedra,  a cornercorner with one O(14)Li3P tetrahedra,  a cornercorner with one O(16)Li3P tetrahedra,  a cornercorner with one O(7)Li3P tetrahedra, and  a cornercorner with one O(9)LiCu2P tetrahedra. In the sixteenth O site, O(16) is bonded to one Li(1), one Li(7), one Li(8), and one P(1) atom to form distorted OLi3P tetrahedra that share  a cornercorner with one O(6)Li2CuP tetrahedra,  a cornercorner with one O(15)Li3P tetrahedra, corners with two equivalent O(12)Li3P tetrahedra, and corners with two equivalent O(14)Li3P tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li4Cu(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.247
_cell_length_b   6.383
_cell_length_c   9.946
_cell_angle_alpha   90.436
_cell_angle_beta   90.300
_cell_angle_gamma   90.456
_symmetry_Int_Tables_number   1
_cell_volume   333.096
_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  0.318  0.763  0.509  1.0
  Li  Li1  1  0.671  0.246  0.749  1.0
  Li  Li2  1  0.326  0.243  0.996  1.0
  Li  Li3  1  0.670  0.243  0.250  1.0
  Li  Li4  1  0.323  0.241  0.503  1.0
  Li  Li5  1  0.843  0.490  0.996  1.0
  Li  Li6  1  0.684  0.753  0.746  1.0
  Li  Li7  1  0.842  0.497  0.509  1.0
  Cu  Cu8  1  0.322  0.767  0.990  1.0
  Cu  Cu9  1  0.677  0.747  0.260  1.0
  P  P10  1  0.823  0.002  0.500  1.0
  P  P11  1  0.185  0.494  0.249  1.0
  P  P12  1  0.181  0.497  0.751  1.0
  P  P13  1  0.820  0.005  0.990  1.0
  O  O14  1  0.104  0.001  0.034  1.0
  O  O15  1  0.321  0.705  0.801  1.0
  O  O16  1  0.106  0.003  0.534  1.0
  O  O17  1  0.183  0.496  0.091  1.0
  O  O18  1  0.316  0.698  0.304  1.0
  O  O19  1  0.898  0.496  0.298  1.0
  O  O20  1  0.692  0.201  0.053  1.0
  O  O21  1  0.322  0.303  0.303  1.0
  O  O22  1  0.692  0.793  0.049  1.0
  O  O23  1  0.786  0.000  0.839  1.0
  O  O24  1  0.787  0.003  0.342  1.0
  O  O25  1  0.188  0.503  0.594  1.0
  O  O26  1  0.325  0.309  0.807  1.0
  O  O27  1  0.690  0.204  0.552  1.0
  O  O28  1  0.898  0.501  0.799  1.0
  O  O29  1  0.689  0.798  0.551  1.0
[/CIF]
.
The material structure described by Li4Cu(PO4)2 crystallizes in the triclinic P1 space group. There are eight inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(12), one O(16), one O(3), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(10), one O(13), one O(14), and one O(15) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(1), one O(13), one O(4), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Cu(1)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(11), one O(6), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent Cu(2)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(12), one O(14), one O(3), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. In the sixth Li site, Li(6) is bonded to one O(15), one O(4), one O(7), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Cu(1)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the seventh Li site, Li(7) is bonded to one O(10), one O(15), one O(16), and one O(2) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Cu(1)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the eighth Li site, Li(8) is bonded to one O(12), one O(14), one O(16), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(2), one O(4), and one O(9) atom to form CuO4 tetrahedra that share  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the second Cu site, Cu(2) is bonded to one O(11), one O(5), one O(6), and one O(9) atom to form CuO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Cu(1)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(14), one O(16), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Li(8)O4 tetrahedra. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Cu(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, and corners with two equivalent Cu(2)O4 tetrahedra. In the third P site, P(3) is bonded to one O(12), one O(13), one O(15), and one O(2) atom to form PO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Cu(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Li(7)O4 tetrahedra. In the fourth P site, P(4) is bonded to one O(1), one O(10), one O(7), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, and corners with two equivalent Cu(1)O4 tetrahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(3), one Cu(1), and one P(4) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Li(7), one Cu(1), and one P(3) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(1), one Li(5), and one P(1) atom. In the fourth O site, O(4) is bonded to one Li(3), one Li(6), one Cu(1), and one P(2) atom to form distorted OLi2CuP tetrahedra that share  a cornercorner with one O(6)Li2CuP tetrahedra,  a cornercorner with one O(15)Li3P tetrahedra, corners with two equivalent O(7)Li3P tetrahedra, and corners with two equivalent O(9)LiCu2P tetrahedra. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(1), one Cu(2), and one P(2) atom. In the sixth O site, O(6) is bonded to one Li(4), one Li(8), one Cu(2), and one P(2) atom to form distorted OLi2CuP tetrahedra that share  a cornercorner with one O(4)Li2CuP tetrahedra,  a cornercorner with one O(12)Li3P tetrahedra,  a cornercorner with one O(14)Li3P tetrahedra,  a cornercorner with one O(16)Li3P tetrahedra,  a cornercorner with one O(7)Li3P tetrahedra, and  a cornercorner with one O(9)LiCu2P tetrahedra. In the seventh O site, O(7) is bonded to one Li(3), one Li(4), one Li(6), and one P(4) atom to form OLi3P tetrahedra that share  a cornercorner with one O(6)Li2CuP tetrahedra,  a cornercorner with one O(15)Li3P tetrahedra, corners with two equivalent O(4)Li2CuP tetrahedra, and corners with two equivalent O(9)LiCu2P tetrahedra. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Li(4), one Li(5), and one P(2) atom. In the ninth O site, O(9) is bonded to one Li(6), one Cu(1), one Cu(2), and one P(4) atom to form OLiCu2P tetrahedra that share  a cornercorner with one O(6)Li2CuP tetrahedra,  a cornercorner with one O(15)Li3P tetrahedra, corners with two equivalent O(4)Li2CuP tetrahedra, and corners with two equivalent O(7)Li3P tetrahedra. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Li(2), one Li(7), and one P(4) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Li(4), one Cu(2), and one P(1) atom. In the twelfth O site, O(12) is bonded to one Li(1), one Li(5), one Li(8), and one P(3) atom to form OLi3P tetrahedra that share  a cornercorner with one O(6)Li2CuP tetrahedra,  a cornercorner with one O(15)Li3P tetrahedra, corners with two equivalent O(14)Li3P tetrahedra, and corners with two equivalent O(16)Li3P tetrahedra. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Li(2), one Li(3), and one P(3) atom. In the fourteenth O site, O(14) is bonded to one Li(2), one Li(5), one Li(8), and one P(1) atom to form distorted OLi3P tetrahedra that share  a cornercorner with one O(6)Li2CuP tetrahedra,  a cornercorner with one O(15)Li3P tetrahedra, corners with two equivalent O(12)Li3P tetrahedra, and corners with two equivalent O(16)Li3P tetrahedra. In the fifteenth O site, O(15) is bonded to one Li(2), one Li(6), one Li(7), and one P(3) atom to form OLi3P tetrahedra that share  a cornercorner with one O(4)Li2CuP tetrahedra,  a cornercorner with one O(12)Li3P tetrahedra,  a cornercorner with one O(14)Li3P tetrahedra,  a cornercorner with one O(16)Li3P tetrahedra,  a cornercorner with one O(7)Li3P tetrahedra, and  a cornercorner with one O(9)LiCu2P tetrahedra. In the sixteenth O site, O(16) is bonded to one Li(1), one Li(7), one Li(8), and one P(1) atom to form distorted OLi3P tetrahedra that share  a cornercorner with one O(6)Li2CuP tetrahedra,  a cornercorner with one O(15)Li3P tetrahedra, corners with two equivalent O(12)Li3P tetrahedra, and corners with two equivalent O(14)Li3P tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li4Cu(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.247
_cell_length_b   6.383
_cell_length_c   9.946
_cell_angle_alpha   90.436
_cell_angle_beta   90.300
_cell_angle_gamma   90.456
_symmetry_Int_Tables_number   1
_cell_volume   333.096
_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  0.318  0.763  0.509  1.0
  Li  Li1  1  0.671  0.246  0.749  1.0
  Li  Li2  1  0.326  0.243  0.996  1.0
  Li  Li3  1  0.670  0.243  0.250  1.0
  Li  Li4  1  0.323  0.241  0.503  1.0
  Li  Li5  1  0.843  0.490  0.996  1.0
  Li  Li6  1  0.684  0.753  0.746  1.0
  Li  Li7  1  0.842  0.497  0.509  1.0
  Cu  Cu8  1  0.322  0.767  0.990  1.0
  Cu  Cu9  1  0.677  0.747  0.260  1.0
  P  P10  1  0.823  0.002  0.500  1.0
  P  P11  1  0.185  0.494  0.249  1.0
  P  P12  1  0.181  0.497  0.751  1.0
  P  P13  1  0.820  0.005  0.990  1.0
  O  O14  1  0.104  0.001  0.034  1.0
  O  O15  1  0.321  0.705  0.801  1.0
  O  O16  1  0.106  0.003  0.534  1.0
  O  O17  1  0.183  0.496  0.091  1.0
  O  O18  1  0.316  0.698  0.304  1.0
  O  O19  1  0.898  0.496  0.298  1.0
  O  O20  1  0.692  0.201  0.053  1.0
  O  O21  1  0.322  0.303  0.303  1.0
  O  O22  1  0.692  0.793  0.049  1.0
  O  O23  1  0.786  0.000  0.839  1.0
  O  O24  1  0.787  0.003  0.342  1.0
  O  O25  1  0.188  0.503  0.594  1.0
  O  O26  1  0.325  0.309  0.807  1.0
  O  O27  1  0.690  0.204  0.552  1.0
  O  O28  1  0.898  0.501  0.799  1.0
  O  O29  1  0.689  0.798  0.551  1.0
[/CIF]
.