The structure described by CuSiO4 crystallizes in the trigonal R-3 space group. Cu(1) is bonded to one O(4), two equivalent O(2), and two equivalent O(3) atoms to form CuO5 trigonal bipyramids that share corners with four equivalent Si(1)O4 tetrahedra, corners with two equivalent Cu(1)O5 trigonal bipyramids, and  an edgeedge with one Cu(1)O5 trigonal bipyramid. 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 two equivalent Si(1)O4 tetrahedra and corners with four equivalent Cu(1)O5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to two equivalent Cu(1) and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Cu(1) and one Si(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Cu(1) atom. is represented by the CIF file [CIF]
data_CuSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.764
_cell_length_b   8.764
_cell_length_c   8.764
_cell_angle_alpha   111.409
_cell_angle_beta   111.409
_cell_angle_gamma   111.409
_symmetry_Int_Tables_number   1
_cell_volume   477.350
_cell_formula_units_Z   6
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
  Cu  Cu0  1  0.476  0.089  0.663  1.0
  Cu  Cu1  1  0.089  0.663  0.476  1.0
  Cu  Cu2  1  0.663  0.476  0.089  1.0
  Cu  Cu3  1  0.524  0.911  0.337  1.0
  Cu  Cu4  1  0.911  0.337  0.524  1.0
  Cu  Cu5  1  0.337  0.524  0.911  1.0
  Si  Si6  1  0.079  0.820  0.212  1.0
  Si  Si7  1  0.820  0.212  0.079  1.0
  Si  Si8  1  0.212  0.079  0.820  1.0
  Si  Si9  1  0.921  0.180  0.788  1.0
  Si  Si10  1  0.180  0.788  0.921  1.0
  Si  Si11  1  0.788  0.921  0.180  1.0
  O  O12  1  0.012  0.972  0.266  1.0
  O  O13  1  0.972  0.266  0.012  1.0
  O  O14  1  0.266  0.012  0.972  1.0
  O  O15  1  0.988  0.028  0.734  1.0
  O  O16  1  0.028  0.734  0.988  1.0
  O  O17  1  0.734  0.988  0.028  1.0
  O  O18  1  0.631  0.218  0.956  1.0
  O  O19  1  0.218  0.956  0.631  1.0
  O  O20  1  0.956  0.631  0.218  1.0
  O  O21  1  0.369  0.782  0.044  1.0
  O  O22  1  0.782  0.044  0.369  1.0
  O  O23  1  0.044  0.369  0.782  1.0
  O  O24  1  0.321  0.938  0.368  1.0
  O  O25  1  0.938  0.368  0.321  1.0
  O  O26  1  0.368  0.321  0.938  1.0
  O  O27  1  0.679  0.062  0.632  1.0
  O  O28  1  0.062  0.632  0.679  1.0
  O  O29  1  0.632  0.679  0.062  1.0
  O  O30  1  0.541  0.330  0.679  1.0
  O  O31  1  0.330  0.679  0.541  1.0
  O  O32  1  0.679  0.541  0.330  1.0
  O  O33  1  0.459  0.670  0.321  1.0
  O  O34  1  0.670  0.321  0.459  1.0
  O  O35  1  0.321  0.459  0.670  1.0
[/CIF]
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The structure described by CuSiO4 crystallizes in the trigonal R-3 space group. Cu(1) is bonded to one O(4), two equivalent O(2), and two equivalent O(3) atoms to form CuO5 trigonal bipyramids that share corners with four equivalent Si(1)O4 tetrahedra, corners with two equivalent Cu(1)O5 trigonal bipyramids, and  an edgeedge with one Cu(1)O5 trigonal bipyramid. 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 two equivalent Si(1)O4 tetrahedra and corners with four equivalent Cu(1)O5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to two equivalent Cu(1) and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Cu(1) and one Si(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Cu(1) atom. is represented by the CIF file [CIF]
data_CuSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.764
_cell_length_b   8.764
_cell_length_c   8.764
_cell_angle_alpha   111.409
_cell_angle_beta   111.409
_cell_angle_gamma   111.409
_symmetry_Int_Tables_number   1
_cell_volume   477.350
_cell_formula_units_Z   6
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
  Cu  Cu0  1  0.476  0.089  0.663  1.0
  Cu  Cu1  1  0.089  0.663  0.476  1.0
  Cu  Cu2  1  0.663  0.476  0.089  1.0
  Cu  Cu3  1  0.524  0.911  0.337  1.0
  Cu  Cu4  1  0.911  0.337  0.524  1.0
  Cu  Cu5  1  0.337  0.524  0.911  1.0
  Si  Si6  1  0.079  0.820  0.212  1.0
  Si  Si7  1  0.820  0.212  0.079  1.0
  Si  Si8  1  0.212  0.079  0.820  1.0
  Si  Si9  1  0.921  0.180  0.788  1.0
  Si  Si10  1  0.180  0.788  0.921  1.0
  Si  Si11  1  0.788  0.921  0.180  1.0
  O  O12  1  0.012  0.972  0.266  1.0
  O  O13  1  0.972  0.266  0.012  1.0
  O  O14  1  0.266  0.012  0.972  1.0
  O  O15  1  0.988  0.028  0.734  1.0
  O  O16  1  0.028  0.734  0.988  1.0
  O  O17  1  0.734  0.988  0.028  1.0
  O  O18  1  0.631  0.218  0.956  1.0
  O  O19  1  0.218  0.956  0.631  1.0
  O  O20  1  0.956  0.631  0.218  1.0
  O  O21  1  0.369  0.782  0.044  1.0
  O  O22  1  0.782  0.044  0.369  1.0
  O  O23  1  0.044  0.369  0.782  1.0
  O  O24  1  0.321  0.938  0.368  1.0
  O  O25  1  0.938  0.368  0.321  1.0
  O  O26  1  0.368  0.321  0.938  1.0
  O  O27  1  0.679  0.062  0.632  1.0
  O  O28  1  0.062  0.632  0.679  1.0
  O  O29  1  0.632  0.679  0.062  1.0
  O  O30  1  0.541  0.330  0.679  1.0
  O  O31  1  0.330  0.679  0.541  1.0
  O  O32  1  0.679  0.541  0.330  1.0
  O  O33  1  0.459  0.670  0.321  1.0
  O  O34  1  0.670  0.321  0.459  1.0
  O  O35  1  0.321  0.459  0.670  1.0
[/CIF]
.