The material structure described by Cs4K2Cu(SiO4)2 crystallizes in the tetragonal P4_2/mnm space group. Cs(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. K(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. Si(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Cs(1), two equivalent K(1), one Cu(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to four equivalent Cs(1), one K(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Cs4K2Cu(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.592
_cell_length_b   10.592
_cell_length_c   6.179
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   693.221
_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
  Cs  Cs0  1  0.384  0.863  0.000  1.0
  Cs  Cs1  1  0.616  0.137  0.000  1.0
  Cs  Cs2  1  0.863  0.384  0.000  1.0
  Cs  Cs3  1  0.884  0.637  0.500  1.0
  Cs  Cs4  1  0.137  0.616  0.000  1.0
  Cs  Cs5  1  0.363  0.116  0.500  1.0
  Cs  Cs6  1  0.116  0.363  0.500  1.0
  Cs  Cs7  1  0.637  0.884  0.500  1.0
  K  K8  1  0.897  0.103  0.500  1.0
  K  K9  1  0.397  0.397  0.000  1.0
  K  K10  1  0.603  0.603  0.000  1.0
  K  K11  1  0.103  0.897  0.500  1.0
  Cu  Cu12  1  0.500  0.500  0.500  1.0
  Cu  Cu13  1  0.000  0.000  0.000  1.0
  Si  Si14  1  0.824  0.824  0.000  1.0
  Si  Si15  1  0.324  0.676  0.500  1.0
  Si  Si16  1  0.176  0.176  0.000  1.0
  Si  Si17  1  0.676  0.324  0.500  1.0
  O  O18  1  0.898  0.898  0.207  1.0
  O  O19  1  0.102  0.102  0.793  1.0
  O  O20  1  0.852  0.671  0.000  1.0
  O  O21  1  0.602  0.398  0.293  1.0
  O  O22  1  0.829  0.352  0.500  1.0
  O  O23  1  0.602  0.398  0.707  1.0
  O  O24  1  0.398  0.602  0.293  1.0
  O  O25  1  0.648  0.171  0.500  1.0
  O  O26  1  0.671  0.852  0.000  1.0
  O  O27  1  0.898  0.898  0.793  1.0
  O  O28  1  0.148  0.329  0.000  1.0
  O  O29  1  0.102  0.102  0.207  1.0
  O  O30  1  0.352  0.829  0.500  1.0
  O  O31  1  0.398  0.602  0.707  1.0
  O  O32  1  0.329  0.148  0.000  1.0
  O  O33  1  0.171  0.648  0.500  1.0
[/CIF]
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The material structure described by Cs4K2Cu(SiO4)2 crystallizes in the tetragonal P4_2/mnm space group. Cs(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. K(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. Si(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Cs(1), two equivalent K(1), one Cu(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to four equivalent Cs(1), one K(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Cs4K2Cu(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.592
_cell_length_b   10.592
_cell_length_c   6.179
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   693.221
_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
  Cs  Cs0  1  0.384  0.863  0.000  1.0
  Cs  Cs1  1  0.616  0.137  0.000  1.0
  Cs  Cs2  1  0.863  0.384  0.000  1.0
  Cs  Cs3  1  0.884  0.637  0.500  1.0
  Cs  Cs4  1  0.137  0.616  0.000  1.0
  Cs  Cs5  1  0.363  0.116  0.500  1.0
  Cs  Cs6  1  0.116  0.363  0.500  1.0
  Cs  Cs7  1  0.637  0.884  0.500  1.0
  K  K8  1  0.897  0.103  0.500  1.0
  K  K9  1  0.397  0.397  0.000  1.0
  K  K10  1  0.603  0.603  0.000  1.0
  K  K11  1  0.103  0.897  0.500  1.0
  Cu  Cu12  1  0.500  0.500  0.500  1.0
  Cu  Cu13  1  0.000  0.000  0.000  1.0
  Si  Si14  1  0.824  0.824  0.000  1.0
  Si  Si15  1  0.324  0.676  0.500  1.0
  Si  Si16  1  0.176  0.176  0.000  1.0
  Si  Si17  1  0.676  0.324  0.500  1.0
  O  O18  1  0.898  0.898  0.207  1.0
  O  O19  1  0.102  0.102  0.793  1.0
  O  O20  1  0.852  0.671  0.000  1.0
  O  O21  1  0.602  0.398  0.293  1.0
  O  O22  1  0.829  0.352  0.500  1.0
  O  O23  1  0.602  0.398  0.707  1.0
  O  O24  1  0.398  0.602  0.293  1.0
  O  O25  1  0.648  0.171  0.500  1.0
  O  O26  1  0.671  0.852  0.000  1.0
  O  O27  1  0.898  0.898  0.793  1.0
  O  O28  1  0.148  0.329  0.000  1.0
  O  O29  1  0.102  0.102  0.207  1.0
  O  O30  1  0.352  0.829  0.500  1.0
  O  O31  1  0.398  0.602  0.707  1.0
  O  O32  1  0.329  0.148  0.000  1.0
  O  O33  1  0.171  0.648  0.500  1.0
[/CIF]
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