The structure described by K3Cu(CN)4 crystallizes in the trigonal R3c space group. K(1) is bonded in a 9-coordinate geometry to one C(2), three equivalent C(1), one N(2), and four equivalent N(1) atoms. Cu(1) is bonded in a tetrahedral geometry to one C(2) and three equivalent C(1) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted linear geometry to three equivalent K(1), one Cu(1), and one N(1) atom. In the second C site, C(2) is bonded in a distorted linear geometry to three equivalent K(1), one Cu(1), and one N(2) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted single-bond geometry to four equivalent K(1) and one C(1) atom. In the second N site, N(2) is bonded in a distorted single-bond geometry to three equivalent K(1) and one C(2) atom. is represented by the CIF file [CIF]
data_K3Cu(CN)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.077
_cell_length_b   8.077
_cell_length_c   8.077
_cell_angle_alpha   75.581
_cell_angle_beta   75.581
_cell_angle_gamma   75.581
_symmetry_Int_Tables_number   1
_cell_volume   484.406
_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
  K  K0  1  0.009  0.501  0.667  1.0
  K  K1  1  0.667  0.009  0.501  1.0
  K  K2  1  0.501  0.667  0.009  1.0
  K  K3  1  0.509  0.167  0.001  1.0
  K  K4  1  0.001  0.509  0.167  1.0
  K  K5  1  0.167  0.001  0.509  1.0
  Cu  Cu6  1  0.499  0.499  0.499  1.0
  Cu  Cu7  1  0.999  0.999  0.999  1.0
  C  C8  1  0.365  0.508  0.734  1.0
  C  C9  1  0.508  0.734  0.365  1.0
  C  C10  1  0.884  0.884  0.884  1.0
  C  C11  1  0.384  0.384  0.384  1.0
  C  C12  1  0.734  0.365  0.508  1.0
  C  C13  1  0.008  0.865  0.234  1.0
  C  C14  1  0.234  0.008  0.865  1.0
  C  C15  1  0.865  0.234  0.008  1.0
  N  N16  1  0.007  0.782  0.377  1.0
  N  N17  1  0.877  0.282  0.507  1.0
  N  N18  1  0.282  0.507  0.877  1.0
  N  N19  1  0.507  0.877  0.282  1.0
  N  N20  1  0.815  0.815  0.815  1.0
  N  N21  1  0.315  0.315  0.315  1.0
  N  N22  1  0.782  0.377  0.007  1.0
  N  N23  1  0.377  0.007  0.782  1.0
[/CIF]
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The structure described by K3Cu(CN)4 crystallizes in the trigonal R3c space group. K(1) is bonded in a 9-coordinate geometry to one C(2), three equivalent C(1), one N(2), and four equivalent N(1) atoms. Cu(1) is bonded in a tetrahedral geometry to one C(2) and three equivalent C(1) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted linear geometry to three equivalent K(1), one Cu(1), and one N(1) atom. In the second C site, C(2) is bonded in a distorted linear geometry to three equivalent K(1), one Cu(1), and one N(2) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted single-bond geometry to four equivalent K(1) and one C(1) atom. In the second N site, N(2) is bonded in a distorted single-bond geometry to three equivalent K(1) and one C(2) atom. is represented by the CIF file [CIF]
data_K3Cu(CN)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.077
_cell_length_b   8.077
_cell_length_c   8.077
_cell_angle_alpha   75.581
_cell_angle_beta   75.581
_cell_angle_gamma   75.581
_symmetry_Int_Tables_number   1
_cell_volume   484.406
_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
  K  K0  1  0.009  0.501  0.667  1.0
  K  K1  1  0.667  0.009  0.501  1.0
  K  K2  1  0.501  0.667  0.009  1.0
  K  K3  1  0.509  0.167  0.001  1.0
  K  K4  1  0.001  0.509  0.167  1.0
  K  K5  1  0.167  0.001  0.509  1.0
  Cu  Cu6  1  0.499  0.499  0.499  1.0
  Cu  Cu7  1  0.999  0.999  0.999  1.0
  C  C8  1  0.365  0.508  0.734  1.0
  C  C9  1  0.508  0.734  0.365  1.0
  C  C10  1  0.884  0.884  0.884  1.0
  C  C11  1  0.384  0.384  0.384  1.0
  C  C12  1  0.734  0.365  0.508  1.0
  C  C13  1  0.008  0.865  0.234  1.0
  C  C14  1  0.234  0.008  0.865  1.0
  C  C15  1  0.865  0.234  0.008  1.0
  N  N16  1  0.007  0.782  0.377  1.0
  N  N17  1  0.877  0.282  0.507  1.0
  N  N18  1  0.282  0.507  0.877  1.0
  N  N19  1  0.507  0.877  0.282  1.0
  N  N20  1  0.815  0.815  0.815  1.0
  N  N21  1  0.315  0.315  0.315  1.0
  N  N22  1  0.782  0.377  0.007  1.0
  N  N23  1  0.377  0.007  0.782  1.0
[/CIF]
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