The crystal structure described by Li2CuSiO4 is beta beryllia-derived structured and crystallizes in the orthorhombic Pnma space group. Li(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form LiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with four equivalent Cu(1)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. Cu(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form CuO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra and corners with eight equivalent Li(1)O4 tetrahedra. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with four equivalent Cu(1)O4 tetrahedra and corners with eight equivalent Li(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Li(1), one Cu(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OLi2CuSi trigonal pyramids. In the second O site, O(2) is bonded to two equivalent Li(1), one Cu(1), and one Si(1) atom to form corner-sharing OLi2CuSi tetrahedra. In the third O site, O(3) is bonded to two equivalent Li(1), one Cu(1), and one Si(1) atom to form corner-sharing OLi2CuSi tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2CuSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.008
_cell_length_b   6.305
_cell_length_c   10.642
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   335.997
_cell_formula_units_Z   4
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  0.181  0.998  0.589  1.0
  Li  Li1  1  0.319  0.998  0.089  1.0
  Li  Li2  1  0.319  0.502  0.089  1.0
  Li  Li3  1  0.181  0.502  0.589  1.0
  Li  Li4  1  0.681  0.498  0.911  1.0
  Li  Li5  1  0.819  0.498  0.411  1.0
  Li  Li6  1  0.681  0.002  0.911  1.0
  Li  Li7  1  0.819  0.002  0.411  1.0
  Cu  Cu8  1  0.685  0.250  0.656  1.0
  Cu  Cu9  1  0.815  0.250  0.156  1.0
  Cu  Cu10  1  0.315  0.750  0.344  1.0
  Cu  Cu11  1  0.185  0.750  0.844  1.0
  Si  Si12  1  0.171  0.250  0.830  1.0
  Si  Si13  1  0.329  0.250  0.330  1.0
  Si  Si14  1  0.671  0.750  0.670  1.0
  Si  Si15  1  0.829  0.750  0.170  1.0
  O  O16  1  0.778  0.964  0.596  1.0
  O  O17  1  0.722  0.964  0.096  1.0
  O  O18  1  0.276  0.250  0.683  1.0
  O  O19  1  0.659  0.250  0.331  1.0
  O  O20  1  0.841  0.250  0.831  1.0
  O  O21  1  0.224  0.250  0.183  1.0
  O  O22  1  0.722  0.536  0.096  1.0
  O  O23  1  0.778  0.536  0.596  1.0
  O  O24  1  0.222  0.464  0.404  1.0
  O  O25  1  0.278  0.464  0.904  1.0
  O  O26  1  0.724  0.750  0.317  1.0
  O  O27  1  0.776  0.750  0.817  1.0
  O  O28  1  0.341  0.750  0.669  1.0
  O  O29  1  0.159  0.750  0.169  1.0
  O  O30  1  0.222  0.036  0.404  1.0
  O  O31  1  0.278  0.036  0.904  1.0
[/CIF]
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The crystal structure described by Li2CuSiO4 is beta beryllia-derived structured and crystallizes in the orthorhombic Pnma space group. Li(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form LiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with four equivalent Cu(1)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. Cu(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form CuO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra and corners with eight equivalent Li(1)O4 tetrahedra. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with four equivalent Cu(1)O4 tetrahedra and corners with eight equivalent Li(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Li(1), one Cu(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OLi2CuSi trigonal pyramids. In the second O site, O(2) is bonded to two equivalent Li(1), one Cu(1), and one Si(1) atom to form corner-sharing OLi2CuSi tetrahedra. In the third O site, O(3) is bonded to two equivalent Li(1), one Cu(1), and one Si(1) atom to form corner-sharing OLi2CuSi tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2CuSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.008
_cell_length_b   6.305
_cell_length_c   10.642
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   335.997
_cell_formula_units_Z   4
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  0.181  0.998  0.589  1.0
  Li  Li1  1  0.319  0.998  0.089  1.0
  Li  Li2  1  0.319  0.502  0.089  1.0
  Li  Li3  1  0.181  0.502  0.589  1.0
  Li  Li4  1  0.681  0.498  0.911  1.0
  Li  Li5  1  0.819  0.498  0.411  1.0
  Li  Li6  1  0.681  0.002  0.911  1.0
  Li  Li7  1  0.819  0.002  0.411  1.0
  Cu  Cu8  1  0.685  0.250  0.656  1.0
  Cu  Cu9  1  0.815  0.250  0.156  1.0
  Cu  Cu10  1  0.315  0.750  0.344  1.0
  Cu  Cu11  1  0.185  0.750  0.844  1.0
  Si  Si12  1  0.171  0.250  0.830  1.0
  Si  Si13  1  0.329  0.250  0.330  1.0
  Si  Si14  1  0.671  0.750  0.670  1.0
  Si  Si15  1  0.829  0.750  0.170  1.0
  O  O16  1  0.778  0.964  0.596  1.0
  O  O17  1  0.722  0.964  0.096  1.0
  O  O18  1  0.276  0.250  0.683  1.0
  O  O19  1  0.659  0.250  0.331  1.0
  O  O20  1  0.841  0.250  0.831  1.0
  O  O21  1  0.224  0.250  0.183  1.0
  O  O22  1  0.722  0.536  0.096  1.0
  O  O23  1  0.778  0.536  0.596  1.0
  O  O24  1  0.222  0.464  0.404  1.0
  O  O25  1  0.278  0.464  0.904  1.0
  O  O26  1  0.724  0.750  0.317  1.0
  O  O27  1  0.776  0.750  0.817  1.0
  O  O28  1  0.341  0.750  0.669  1.0
  O  O29  1  0.159  0.750  0.169  1.0
  O  O30  1  0.222  0.036  0.404  1.0
  O  O31  1  0.278  0.036  0.904  1.0
[/CIF]
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