The structure described by Na2Cu5(Si2O7)2 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 3-coordinate geometry to one Cu(3), one O(2), and two equivalent O(5) atoms. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(5), one O(6), and one O(7) atom. In the second Cu site, Cu(2) is bonded in a 4-coordinate geometry to two equivalent O(6) and two equivalent O(7) atoms. In the third Cu site, Cu(3) is bonded in a 5-coordinate geometry to one Na(1), one O(3), one O(5), and two equivalent O(4) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(7) atom. In the second Si site, Si(2) is bonded in a 1-coordinate geometry to one O(2), one O(4), and one O(6) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Cu(1) and one Si(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Si(1), and one Si(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Cu(1) and one Cu(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Cu(3) and one Si(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Cu(1), and one Cu(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Cu(1), one Cu(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Cu(1), one Cu(2), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Cu5(Si2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.822
_cell_length_b   7.897
_cell_length_c   8.118
_cell_angle_alpha   116.669
_cell_angle_beta   87.315
_cell_angle_gamma   110.755
_symmetry_Int_Tables_number   1
_cell_volume   309.031
_cell_formula_units_Z   1
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
  Na  Na0  1  0.767  0.689  0.942  1.0
  Na  Na1  1  0.233  0.311  0.058  1.0
  Cu  Cu2  1  0.187  0.840  0.228  1.0
  Cu  Cu3  1  0.500  0.000  0.500  1.0
  Cu  Cu4  1  0.813  0.160  0.772  1.0
  Cu  Cu5  1  0.583  0.577  0.319  1.0
  Cu  Cu6  1  0.417  0.423  0.681  1.0
  Si  Si7  1  0.307  0.805  0.909  1.0
  Si  Si8  1  0.014  0.626  0.635  1.0
  Si  Si9  1  0.986  0.374  0.365  1.0
  Si  Si10  1  0.693  0.195  0.091  1.0
  O  O11  1  0.806  0.079  0.029  1.0
  O  O12  1  0.938  0.298  0.206  1.0
  O  O13  1  0.909  0.592  0.267  1.0
  O  O14  1  0.091  0.408  0.733  1.0
  O  O15  1  0.718  0.594  0.551  1.0
  O  O16  1  0.579  0.381  0.923  1.0
  O  O17  1  0.062  0.702  0.794  1.0
  O  O18  1  0.194  0.921  0.971  1.0
  O  O19  1  0.282  0.406  0.449  1.0
  O  O20  1  0.192  0.804  0.476  1.0
  O  O21  1  0.512  0.946  0.758  1.0
  O  O22  1  0.488  0.054  0.242  1.0
  O  O23  1  0.808  0.196  0.524  1.0
  O  O24  1  0.421  0.619  0.077  1.0
[/CIF]
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The structure described by Na2Cu5(Si2O7)2 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 3-coordinate geometry to one Cu(3), one O(2), and two equivalent O(5) atoms. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(5), one O(6), and one O(7) atom. In the second Cu site, Cu(2) is bonded in a 4-coordinate geometry to two equivalent O(6) and two equivalent O(7) atoms. In the third Cu site, Cu(3) is bonded in a 5-coordinate geometry to one Na(1), one O(3), one O(5), and two equivalent O(4) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(7) atom. In the second Si site, Si(2) is bonded in a 1-coordinate geometry to one O(2), one O(4), and one O(6) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Cu(1) and one Si(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Si(1), and one Si(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Cu(1) and one Cu(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Cu(3) and one Si(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Cu(1), and one Cu(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Cu(1), one Cu(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Cu(1), one Cu(2), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Cu5(Si2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.822
_cell_length_b   7.897
_cell_length_c   8.118
_cell_angle_alpha   116.669
_cell_angle_beta   87.315
_cell_angle_gamma   110.755
_symmetry_Int_Tables_number   1
_cell_volume   309.031
_cell_formula_units_Z   1
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
  Na  Na0  1  0.767  0.689  0.942  1.0
  Na  Na1  1  0.233  0.311  0.058  1.0
  Cu  Cu2  1  0.187  0.840  0.228  1.0
  Cu  Cu3  1  0.500  0.000  0.500  1.0
  Cu  Cu4  1  0.813  0.160  0.772  1.0
  Cu  Cu5  1  0.583  0.577  0.319  1.0
  Cu  Cu6  1  0.417  0.423  0.681  1.0
  Si  Si7  1  0.307  0.805  0.909  1.0
  Si  Si8  1  0.014  0.626  0.635  1.0
  Si  Si9  1  0.986  0.374  0.365  1.0
  Si  Si10  1  0.693  0.195  0.091  1.0
  O  O11  1  0.806  0.079  0.029  1.0
  O  O12  1  0.938  0.298  0.206  1.0
  O  O13  1  0.909  0.592  0.267  1.0
  O  O14  1  0.091  0.408  0.733  1.0
  O  O15  1  0.718  0.594  0.551  1.0
  O  O16  1  0.579  0.381  0.923  1.0
  O  O17  1  0.062  0.702  0.794  1.0
  O  O18  1  0.194  0.921  0.971  1.0
  O  O19  1  0.282  0.406  0.449  1.0
  O  O20  1  0.192  0.804  0.476  1.0
  O  O21  1  0.512  0.946  0.758  1.0
  O  O22  1  0.488  0.054  0.242  1.0
  O  O23  1  0.808  0.196  0.524  1.0
  O  O24  1  0.421  0.619  0.077  1.0
[/CIF]
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