The compound described by Li7SiPO8 crystallizes in the triclinic P1 space group. There are fourteen inequivalent Li sites. In the first Li site, Li(1) is bonded in a trigonal planar geometry to one O(12), one O(13), and one O(7) atom. In the second Li site, Li(2) is bonded to one O(11), one O(14), one O(3), and one O(8) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(14)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(12)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one Li(4)O5 square pyramid. In the third Li site, Li(3) is bonded to one O(10), one O(16), one O(5), one O(6), and one O(9) atom to form distorted LiO5 square pyramids that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(14)O4 tetrahedra,  an edgeedge with one Li(13)O4 tetrahedra,  an edgeedge with one Li(6)O4 tetrahedra,  an edgeedge with one Si(1)O4 tetrahedra, and  an edgeedge with one Si(2)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(11), one O(12), one O(13), one O(3), and one O(4) atom to form distorted LiO5 square pyramids that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(12)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. In the fifth Li site, Li(5) is bonded in a trigonal planar geometry to one O(1), one O(16), and one O(9) atom. In the sixth Li site, Li(6) is bonded to one O(10), one O(15), one O(2), and one O(5) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(14)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(13)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(3)O5 square pyramid. In the seventh Li site, Li(7) is bonded in a 4-coordinate geometry to one O(1), one O(11), one O(13), and one O(3) atom. In the eighth Li site, Li(8) is bonded to one O(12), one O(14), one O(2), and one O(4) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Li(4)O5 square pyramids,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(11)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. In the ninth Li site, Li(9) is bonded to one O(1), one O(15), one O(3), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O5 square pyramid,  a cornercorner with one Li(4)O5 square pyramid,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(14)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. In the tenth Li site, Li(10) is bonded to one O(10), one O(16), one O(2), and one O(4) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(4)O5 square pyramid, corners with two equivalent Li(3)O5 square pyramids,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent Li(13)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and  an edgeedge with one Si(2)O4 tetrahedra. In the eleventh Li site, Li(11) is bonded to one O(12), one O(14), one O(5), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(3)O5 square pyramid,  a cornercorner with one Li(4)O5 square pyramid,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(13)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. In the twelfth Li site, Li(12) is bonded to one O(11), one O(13), one O(6), and one O(8) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(3)O5 square pyramid, corners with two equivalent Li(4)O5 square pyramids,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent Li(14)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. In the thirteenth Li site, Li(13) is bonded to one O(10), one O(16), one O(5), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O5 square pyramid,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(11)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra,  an edgeedge with one Li(3)O5 square pyramid, and  an edgeedge with one Si(2)O4 tetrahedra. In the fourteenth Li site, Li(14) is bonded to one O(15), one O(6), one O(8), and one O(9) atom to form LiO4 tetrahedra that share corners with two equivalent Li(3)O5 square pyramids,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(12)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(10), one O(15), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Li(13)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra,  an edgeedge with one Li(3)O5 square pyramid,  an edgeedge with one Li(14)O4 tetrahedra, and  an edgeedge with one Li(9)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(16), one O(2), one O(5), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O5 square pyramid,  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(14)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra,  an edgeedge with one Li(3)O5 square pyramid,  an edgeedge with one Li(10)O4 tetrahedra, and  an edgeedge with one Li(13)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(12), one O(13), one O(3), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Li(4)O5 square pyramid,  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(14)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra,  an edgeedge with one Li(4)O5 square pyramid, and  an edgeedge with one Li(12)O4 tetrahedra. In the second P site, P(2) is bonded to one O(11), one O(14), one O(4), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Li(13)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra,  an edgeedge with one Li(4)O5 square pyramid,  an edgeedge with one Li(11)O4 tetrahedra, and  an edgeedge with one Li(8)O4 tetrahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Li(5), one Li(7), one Li(9), and one Si(1) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(11)Li4P trigonal bipyramid, corners with two equivalent O(3)Li4P trigonal bipyramids, corners with two equivalent O(9)Li4Si trigonal bipyramids,  a cornercorner with one O(6)Li3Si trigonal pyramid, and  an edgeedge with one O(15)Li3Si trigonal pyramid. In the second O site, O(2) is bonded to one Li(10), one Li(6), one Li(8), and one Si(2) atom to form OLi3Si trigonal pyramids that share  a cornercorner with one O(9)Li4Si trigonal bipyramid, corners with two equivalent O(5)Li4Si trigonal bipyramids,  a cornercorner with one O(14)Li3P trigonal pyramid,  a cornercorner with one O(15)Li3Si trigonal pyramid, and corners with two equivalent O(4)Li3P trigonal pyramids. In the third O site, O(3) is bonded to one Li(2), one Li(4), one Li(7), one Li(9), and one P(1) atom to form distorted OLi4P trigonal bipyramids that share corners with two equivalent O(1)Li3Si tetrahedra,  a cornercorner with one O(11)Li4P trigonal bipyramid,  a cornercorner with one O(9)Li4Si trigonal bipyramid,  a cornercorner with one O(14)Li3P trigonal pyramid,  a cornercorner with one O(4)Li3P trigonal pyramid,  a cornercorner with one O(15)Li3Si trigonal pyramid, corners with two equivalent O(8)Li3P trigonal pyramids, and  an edgeedge with one O(11)Li4P trigonal bipyramid. In the fourth O site, O(4) is bonded to one Li(10), one Li(4), one Li(8), and one P(2) atom to form distorted OLi3P trigonal pyramids that share  a cornercorner with one O(7)Li3P tetrahedra,  a cornercorner with one O(3)Li4P trigonal bipyramid, corners with two equivalent O(2)Li3Si trigonal pyramids,  an edgeedge with one O(11)Li4P trigonal bipyramid, and  an edgeedge with one O(14)Li3P trigonal pyramid. In the fifth O site, O(5) is bonded to one Li(11), one Li(13), one Li(3), one Li(6), and one Si(2) atom to form distorted OLi4Si trigonal bipyramids that share corners with two equivalent O(7)Li3P tetrahedra,  a cornercorner with one O(14)Li3P trigonal pyramid,  a cornercorner with one O(15)Li3Si trigonal pyramid,  a cornercorner with one O(6)Li3Si trigonal pyramid, corners with two equivalent O(2)Li3Si trigonal pyramids, and  an edgeedge with one O(9)Li4Si trigonal bipyramid. In the sixth O site, O(6) is bonded to one Li(12), one Li(14), one Li(3), and one Si(1) atom to form distorted OLi3Si trigonal pyramids that share  a cornercorner with one O(1)Li3Si tetrahedra,  a cornercorner with one O(11)Li4P trigonal bipyramid,  a cornercorner with one O(5)Li4Si trigonal bipyramid, corners with two equivalent O(9)Li4Si trigonal bipyramids, corners with two equivalent O(8)Li3P trigonal pyramids, and  an edgeedge with one O(15)Li3Si trigonal pyramid. In the seventh O site, O(7) is bonded to one Li(1), one Li(11), one Li(13), and one P(2) atom to form OLi3P tetrahedra that share  a cornercorner with one O(11)Li4P trigonal bipyramid, corners with two equivalent O(5)Li4Si trigonal bipyramids,  a cornercorner with one O(4)Li3P trigonal pyramid, and  an edgeedge with one O(14)Li3P trigonal pyramid. In the eighth O site, O(8) is bonded to one Li(12), one Li(14), one Li(2), and one P(1) atom to form OLi3P trigonal pyramids that share  a cornercorner with one O(9)Li4Si trigonal bipyramid, corners with two equivalent O(11)Li4P trigonal bipyramids, corners with two equivalent O(3)Li4P trigonal bipyramids,  a cornercorner with one O(14)Li3P trigonal pyramid,  a cornercorner with one O(15)Li3Si trigonal pyramid, and corners with two equivalent O(6)Li3Si trigonal pyramids. In the ninth O site, O(9) is bonded to one Li(14), one Li(3), one Li(5), one Li(9), and one Si(2) atom to form distorted OLi4Si trigonal bipyramids that share corners with two equivalent O(1)Li3Si tetrahedra,  a cornercorner with one O(3)Li4P trigonal bipyramid,  a cornercorner with one O(8)Li3P trigonal pyramid,  a cornercorner with one O(2)Li3Si trigonal pyramid, corners with two equivalent O(15)Li3Si trigonal pyramids, corners with two equivalent O(6)Li3Si trigonal pyramids, and  an edgeedge with one O(5)Li4Si trigonal bipyramid. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Li(10), one Li(13), one Li(3), one Li(6), and one Si(1) atom. In the eleventh O site, O(11) is bonded to one Li(12), one Li(2), one Li(4), one Li(7), and one P(2) atom to form distorted OLi4P trigonal bipyramids that share  a cornercorner with one O(7)Li3P tetrahedra,  a cornercorner with one O(1)Li3Si tetrahedra,  a cornercorner with one O(3)Li4P trigonal bipyramid,  a cornercorner with one O(6)Li3Si trigonal pyramid, corners with two equivalent O(14)Li3P trigonal pyramids, corners with two equivalent O(8)Li3P trigonal pyramids,  an edgeedge with one O(3)Li4P trigonal bipyramid, and  an edgeedge with one O(4)Li3P trigonal pyramid. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Li(1), one Li(11), one Li(4), one Li(8), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Li(1), one Li(12), one Li(4), one Li(7), and one P(1) atom. In the fourteenth O site, O(14) is bonded to one Li(11), one Li(2), one Li(8), and one P(2) atom to form distorted OLi3P trigonal pyramids that share  a cornercorner with one O(3)Li4P trigonal bipyramid,  a cornercorner with one O(5)Li4Si trigonal bipyramid, corners with two equivalent O(11)Li4P trigonal bipyramids,  a cornercorner with one O(8)Li3P trigonal pyramid,  a cornercorner with one O(2)Li3Si trigonal pyramid,  an edgeedge with one O(7)Li3P tetrahedra, and  an edgeedge with one O(4)Li3P trigonal pyramid. In the fifteenth O site, O(15) is bonded to one Li(14), one Li(6), one Li(9), and one Si(1) atom to form distorted OLi3Si trigonal pyramids that share  a cornercorner with one O(3)Li4P trigonal bipyramid,  a cornercorner with one O(5)Li4Si trigonal bipyramid, corners with two equivalent O(9)Li4Si trigonal bipyramids,  a cornercorner with one O(8)Li3P trigonal pyramid,  a cornercorner with one O(2)Li3Si trigonal pyramid,  an edgeedge with one O(1)Li3Si tetrahedra, and  an edgeedge with one O(6)Li3Si trigonal pyramid. In the sixteenth O site, O(16) is bonded in a distorted pentagonal planar geometry to one Li(10), one Li(13), one Li(3), one Li(5), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li7SiPO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.104
_cell_length_b   6.591
_cell_length_c   10.587
_cell_angle_alpha   89.898
_cell_angle_beta   88.509
_cell_angle_gamma   89.758
_symmetry_Int_Tables_number   1
_cell_volume   356.022
_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  0.878  0.134  0.944  1.0
  Li  Li1  1  0.158  0.789  0.089  1.0
  Li  Li2  1  0.558  0.033  0.504  1.0
  Li  Li3  1  0.938  0.469  0.010  1.0
  Li  Li4  1  0.632  0.367  0.454  1.0
  Li  Li5  1  0.333  0.712  0.569  1.0
  Li  Li6  1  0.612  0.543  0.188  1.0
  Li  Li7  1  0.342  0.477  0.819  1.0
  Li  Li8  1  0.153  0.471  0.334  1.0
  Li  Li9  1  0.837  0.517  0.669  1.0
  Li  Li10  1  0.360  0.023  0.814  1.0
  Li  Li11  1  0.651  0.990  0.186  1.0
  Li  Li12  1  0.875  0.957  0.668  1.0
  Li  Li13  1  0.152  0.032  0.337  1.0
  Si  Si14  1  0.857  0.751  0.412  1.0
  Si  Si15  1  0.151  0.247  0.582  1.0
  P  P16  1  0.348  0.253  0.077  1.0
  P  P17  1  0.647  0.746  0.919  1.0
  O  O18  1  0.774  0.544  0.336  1.0
  O  O19  1  0.226  0.458  0.657  1.0
  O  O20  1  0.245  0.451  0.143  1.0
  O  O21  1  0.740  0.547  0.854  1.0
  O  O22  1  0.253  0.034  0.649  1.0
  O  O23  1  0.764  0.963  0.345  1.0
  O  O24  1  0.738  0.938  0.845  1.0
  O  O25  1  0.266  0.057  0.149  1.0
  O  O26  1  0.288  0.251  0.438  1.0
  O  O27  1  0.729  0.748  0.559  1.0
  O  O28  1  0.764  0.748  0.056  1.0
  O  O29  1  0.227  0.251  0.942  1.0
  O  O30  1  0.655  0.260  0.072  1.0
  O  O31  1  0.342  0.750  0.925  1.0
  O  O32  1  0.181  0.751  0.406  1.0
  O  O33  1  0.826  0.236  0.585  1.0
[/CIF]
.
The compound described by Li7SiPO8 crystallizes in the triclinic P1 space group. There are fourteen inequivalent Li sites. In the first Li site, Li(1) is bonded in a trigonal planar geometry to one O(12), one O(13), and one O(7) atom. In the second Li site, Li(2) is bonded to one O(11), one O(14), one O(3), and one O(8) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(14)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(12)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one Li(4)O5 square pyramid. In the third Li site, Li(3) is bonded to one O(10), one O(16), one O(5), one O(6), and one O(9) atom to form distorted LiO5 square pyramids that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(14)O4 tetrahedra,  an edgeedge with one Li(13)O4 tetrahedra,  an edgeedge with one Li(6)O4 tetrahedra,  an edgeedge with one Si(1)O4 tetrahedra, and  an edgeedge with one Si(2)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(11), one O(12), one O(13), one O(3), and one O(4) atom to form distorted LiO5 square pyramids that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(12)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. In the fifth Li site, Li(5) is bonded in a trigonal planar geometry to one O(1), one O(16), and one O(9) atom. In the sixth Li site, Li(6) is bonded to one O(10), one O(15), one O(2), and one O(5) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(14)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(13)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(3)O5 square pyramid. In the seventh Li site, Li(7) is bonded in a 4-coordinate geometry to one O(1), one O(11), one O(13), and one O(3) atom. In the eighth Li site, Li(8) is bonded to one O(12), one O(14), one O(2), and one O(4) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Li(4)O5 square pyramids,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(11)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. In the ninth Li site, Li(9) is bonded to one O(1), one O(15), one O(3), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O5 square pyramid,  a cornercorner with one Li(4)O5 square pyramid,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(14)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. In the tenth Li site, Li(10) is bonded to one O(10), one O(16), one O(2), and one O(4) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(4)O5 square pyramid, corners with two equivalent Li(3)O5 square pyramids,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent Li(13)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and  an edgeedge with one Si(2)O4 tetrahedra. In the eleventh Li site, Li(11) is bonded to one O(12), one O(14), one O(5), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(3)O5 square pyramid,  a cornercorner with one Li(4)O5 square pyramid,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(13)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. In the twelfth Li site, Li(12) is bonded to one O(11), one O(13), one O(6), and one O(8) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(3)O5 square pyramid, corners with two equivalent Li(4)O5 square pyramids,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent Li(14)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. In the thirteenth Li site, Li(13) is bonded to one O(10), one O(16), one O(5), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O5 square pyramid,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(11)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra,  an edgeedge with one Li(3)O5 square pyramid, and  an edgeedge with one Si(2)O4 tetrahedra. In the fourteenth Li site, Li(14) is bonded to one O(15), one O(6), one O(8), and one O(9) atom to form LiO4 tetrahedra that share corners with two equivalent Li(3)O5 square pyramids,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(12)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(10), one O(15), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Li(13)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra,  an edgeedge with one Li(3)O5 square pyramid,  an edgeedge with one Li(14)O4 tetrahedra, and  an edgeedge with one Li(9)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(16), one O(2), one O(5), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O5 square pyramid,  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(14)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra,  an edgeedge with one Li(3)O5 square pyramid,  an edgeedge with one Li(10)O4 tetrahedra, and  an edgeedge with one Li(13)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(12), one O(13), one O(3), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Li(4)O5 square pyramid,  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(14)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra,  an edgeedge with one Li(4)O5 square pyramid, and  an edgeedge with one Li(12)O4 tetrahedra. In the second P site, P(2) is bonded to one O(11), one O(14), one O(4), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Li(13)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra,  an edgeedge with one Li(4)O5 square pyramid,  an edgeedge with one Li(11)O4 tetrahedra, and  an edgeedge with one Li(8)O4 tetrahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Li(5), one Li(7), one Li(9), and one Si(1) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(11)Li4P trigonal bipyramid, corners with two equivalent O(3)Li4P trigonal bipyramids, corners with two equivalent O(9)Li4Si trigonal bipyramids,  a cornercorner with one O(6)Li3Si trigonal pyramid, and  an edgeedge with one O(15)Li3Si trigonal pyramid. In the second O site, O(2) is bonded to one Li(10), one Li(6), one Li(8), and one Si(2) atom to form OLi3Si trigonal pyramids that share  a cornercorner with one O(9)Li4Si trigonal bipyramid, corners with two equivalent O(5)Li4Si trigonal bipyramids,  a cornercorner with one O(14)Li3P trigonal pyramid,  a cornercorner with one O(15)Li3Si trigonal pyramid, and corners with two equivalent O(4)Li3P trigonal pyramids. In the third O site, O(3) is bonded to one Li(2), one Li(4), one Li(7), one Li(9), and one P(1) atom to form distorted OLi4P trigonal bipyramids that share corners with two equivalent O(1)Li3Si tetrahedra,  a cornercorner with one O(11)Li4P trigonal bipyramid,  a cornercorner with one O(9)Li4Si trigonal bipyramid,  a cornercorner with one O(14)Li3P trigonal pyramid,  a cornercorner with one O(4)Li3P trigonal pyramid,  a cornercorner with one O(15)Li3Si trigonal pyramid, corners with two equivalent O(8)Li3P trigonal pyramids, and  an edgeedge with one O(11)Li4P trigonal bipyramid. In the fourth O site, O(4) is bonded to one Li(10), one Li(4), one Li(8), and one P(2) atom to form distorted OLi3P trigonal pyramids that share  a cornercorner with one O(7)Li3P tetrahedra,  a cornercorner with one O(3)Li4P trigonal bipyramid, corners with two equivalent O(2)Li3Si trigonal pyramids,  an edgeedge with one O(11)Li4P trigonal bipyramid, and  an edgeedge with one O(14)Li3P trigonal pyramid. In the fifth O site, O(5) is bonded to one Li(11), one Li(13), one Li(3), one Li(6), and one Si(2) atom to form distorted OLi4Si trigonal bipyramids that share corners with two equivalent O(7)Li3P tetrahedra,  a cornercorner with one O(14)Li3P trigonal pyramid,  a cornercorner with one O(15)Li3Si trigonal pyramid,  a cornercorner with one O(6)Li3Si trigonal pyramid, corners with two equivalent O(2)Li3Si trigonal pyramids, and  an edgeedge with one O(9)Li4Si trigonal bipyramid. In the sixth O site, O(6) is bonded to one Li(12), one Li(14), one Li(3), and one Si(1) atom to form distorted OLi3Si trigonal pyramids that share  a cornercorner with one O(1)Li3Si tetrahedra,  a cornercorner with one O(11)Li4P trigonal bipyramid,  a cornercorner with one O(5)Li4Si trigonal bipyramid, corners with two equivalent O(9)Li4Si trigonal bipyramids, corners with two equivalent O(8)Li3P trigonal pyramids, and  an edgeedge with one O(15)Li3Si trigonal pyramid. In the seventh O site, O(7) is bonded to one Li(1), one Li(11), one Li(13), and one P(2) atom to form OLi3P tetrahedra that share  a cornercorner with one O(11)Li4P trigonal bipyramid, corners with two equivalent O(5)Li4Si trigonal bipyramids,  a cornercorner with one O(4)Li3P trigonal pyramid, and  an edgeedge with one O(14)Li3P trigonal pyramid. In the eighth O site, O(8) is bonded to one Li(12), one Li(14), one Li(2), and one P(1) atom to form OLi3P trigonal pyramids that share  a cornercorner with one O(9)Li4Si trigonal bipyramid, corners with two equivalent O(11)Li4P trigonal bipyramids, corners with two equivalent O(3)Li4P trigonal bipyramids,  a cornercorner with one O(14)Li3P trigonal pyramid,  a cornercorner with one O(15)Li3Si trigonal pyramid, and corners with two equivalent O(6)Li3Si trigonal pyramids. In the ninth O site, O(9) is bonded to one Li(14), one Li(3), one Li(5), one Li(9), and one Si(2) atom to form distorted OLi4Si trigonal bipyramids that share corners with two equivalent O(1)Li3Si tetrahedra,  a cornercorner with one O(3)Li4P trigonal bipyramid,  a cornercorner with one O(8)Li3P trigonal pyramid,  a cornercorner with one O(2)Li3Si trigonal pyramid, corners with two equivalent O(15)Li3Si trigonal pyramids, corners with two equivalent O(6)Li3Si trigonal pyramids, and  an edgeedge with one O(5)Li4Si trigonal bipyramid. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Li(10), one Li(13), one Li(3), one Li(6), and one Si(1) atom. In the eleventh O site, O(11) is bonded to one Li(12), one Li(2), one Li(4), one Li(7), and one P(2) atom to form distorted OLi4P trigonal bipyramids that share  a cornercorner with one O(7)Li3P tetrahedra,  a cornercorner with one O(1)Li3Si tetrahedra,  a cornercorner with one O(3)Li4P trigonal bipyramid,  a cornercorner with one O(6)Li3Si trigonal pyramid, corners with two equivalent O(14)Li3P trigonal pyramids, corners with two equivalent O(8)Li3P trigonal pyramids,  an edgeedge with one O(3)Li4P trigonal bipyramid, and  an edgeedge with one O(4)Li3P trigonal pyramid. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Li(1), one Li(11), one Li(4), one Li(8), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Li(1), one Li(12), one Li(4), one Li(7), and one P(1) atom. In the fourteenth O site, O(14) is bonded to one Li(11), one Li(2), one Li(8), and one P(2) atom to form distorted OLi3P trigonal pyramids that share  a cornercorner with one O(3)Li4P trigonal bipyramid,  a cornercorner with one O(5)Li4Si trigonal bipyramid, corners with two equivalent O(11)Li4P trigonal bipyramids,  a cornercorner with one O(8)Li3P trigonal pyramid,  a cornercorner with one O(2)Li3Si trigonal pyramid,  an edgeedge with one O(7)Li3P tetrahedra, and  an edgeedge with one O(4)Li3P trigonal pyramid. In the fifteenth O site, O(15) is bonded to one Li(14), one Li(6), one Li(9), and one Si(1) atom to form distorted OLi3Si trigonal pyramids that share  a cornercorner with one O(3)Li4P trigonal bipyramid,  a cornercorner with one O(5)Li4Si trigonal bipyramid, corners with two equivalent O(9)Li4Si trigonal bipyramids,  a cornercorner with one O(8)Li3P trigonal pyramid,  a cornercorner with one O(2)Li3Si trigonal pyramid,  an edgeedge with one O(1)Li3Si tetrahedra, and  an edgeedge with one O(6)Li3Si trigonal pyramid. In the sixteenth O site, O(16) is bonded in a distorted pentagonal planar geometry to one Li(10), one Li(13), one Li(3), one Li(5), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li7SiPO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.104
_cell_length_b   6.591
_cell_length_c   10.587
_cell_angle_alpha   89.898
_cell_angle_beta   88.509
_cell_angle_gamma   89.758
_symmetry_Int_Tables_number   1
_cell_volume   356.022
_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  0.878  0.134  0.944  1.0
  Li  Li1  1  0.158  0.789  0.089  1.0
  Li  Li2  1  0.558  0.033  0.504  1.0
  Li  Li3  1  0.938  0.469  0.010  1.0
  Li  Li4  1  0.632  0.367  0.454  1.0
  Li  Li5  1  0.333  0.712  0.569  1.0
  Li  Li6  1  0.612  0.543  0.188  1.0
  Li  Li7  1  0.342  0.477  0.819  1.0
  Li  Li8  1  0.153  0.471  0.334  1.0
  Li  Li9  1  0.837  0.517  0.669  1.0
  Li  Li10  1  0.360  0.023  0.814  1.0
  Li  Li11  1  0.651  0.990  0.186  1.0
  Li  Li12  1  0.875  0.957  0.668  1.0
  Li  Li13  1  0.152  0.032  0.337  1.0
  Si  Si14  1  0.857  0.751  0.412  1.0
  Si  Si15  1  0.151  0.247  0.582  1.0
  P  P16  1  0.348  0.253  0.077  1.0
  P  P17  1  0.647  0.746  0.919  1.0
  O  O18  1  0.774  0.544  0.336  1.0
  O  O19  1  0.226  0.458  0.657  1.0
  O  O20  1  0.245  0.451  0.143  1.0
  O  O21  1  0.740  0.547  0.854  1.0
  O  O22  1  0.253  0.034  0.649  1.0
  O  O23  1  0.764  0.963  0.345  1.0
  O  O24  1  0.738  0.938  0.845  1.0
  O  O25  1  0.266  0.057  0.149  1.0
  O  O26  1  0.288  0.251  0.438  1.0
  O  O27  1  0.729  0.748  0.559  1.0
  O  O28  1  0.764  0.748  0.056  1.0
  O  O29  1  0.227  0.251  0.942  1.0
  O  O30  1  0.655  0.260  0.072  1.0
  O  O31  1  0.342  0.750  0.925  1.0
  O  O32  1  0.181  0.751  0.406  1.0
  O  O33  1  0.826  0.236  0.585  1.0
[/CIF]
.