The crystal structure described by K5As4 crystallizes in the monoclinic Cm space group. There are five inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to two equivalent As(2), two equivalent As(3), and three equivalent As(1) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to two equivalent As(1), two equivalent As(4), and three equivalent As(2) atoms. In the third K site, K(3) is bonded in a 6-coordinate geometry to one As(4), two equivalent As(1), and three equivalent As(3) atoms. In the fourth K site, K(4) is bonded in a 6-coordinate geometry to one As(3), two equivalent As(2), and three equivalent As(4) atoms. In the fifth K site, K(5) is bonded in a distorted square co-planar geometry to two equivalent As(3) and two equivalent As(4) atoms. There are four inequivalent As sites. In the first As site, As(1) is bonded in a 9-coordinate geometry to two equivalent K(2), two equivalent K(3), three equivalent K(1), one As(2), and one As(3) atom. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent K(1), two equivalent K(4), three equivalent K(2), one As(1), and one As(4) atom. In the third As site, As(3) is bonded in a 9-coordinate geometry to one K(4), two equivalent K(1), two equivalent K(5), three equivalent K(3), and one As(1) atom. In the fourth As site, As(4) is bonded in a 9-coordinate geometry to one K(3), two equivalent K(2), two equivalent K(5), three equivalent K(4), and one As(2) atom. is represented by the CIF file [CIF]
data_K5As4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.184
_cell_length_b   6.384
_cell_length_c   10.111
_cell_angle_alpha   86.589
_cell_angle_beta   75.147
_cell_angle_gamma   113.952
_symmetry_Int_Tables_number   1
_cell_volume   290.463
_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
  K  K0  1  0.709  0.314  0.897  1.0
  K  K1  1  0.292  0.683  0.099  1.0
  K  K2  1  0.583  0.834  0.667  1.0
  K  K3  1  0.414  0.157  0.330  1.0
  K  K4  1  0.997  0.490  0.495  1.0
  As  As5  1  0.011  0.913  0.891  1.0
  As  As6  1  0.989  0.084  0.106  1.0
  As  As7  1  0.267  0.221  0.688  1.0
  As  As8  1  0.733  0.774  0.309  1.0
[/CIF]
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The crystal structure described by K5As4 crystallizes in the monoclinic Cm space group. There are five inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to two equivalent As(2), two equivalent As(3), and three equivalent As(1) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to two equivalent As(1), two equivalent As(4), and three equivalent As(2) atoms. In the third K site, K(3) is bonded in a 6-coordinate geometry to one As(4), two equivalent As(1), and three equivalent As(3) atoms. In the fourth K site, K(4) is bonded in a 6-coordinate geometry to one As(3), two equivalent As(2), and three equivalent As(4) atoms. In the fifth K site, K(5) is bonded in a distorted square co-planar geometry to two equivalent As(3) and two equivalent As(4) atoms. There are four inequivalent As sites. In the first As site, As(1) is bonded in a 9-coordinate geometry to two equivalent K(2), two equivalent K(3), three equivalent K(1), one As(2), and one As(3) atom. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent K(1), two equivalent K(4), three equivalent K(2), one As(1), and one As(4) atom. In the third As site, As(3) is bonded in a 9-coordinate geometry to one K(4), two equivalent K(1), two equivalent K(5), three equivalent K(3), and one As(1) atom. In the fourth As site, As(4) is bonded in a 9-coordinate geometry to one K(3), two equivalent K(2), two equivalent K(5), three equivalent K(4), and one As(2) atom. is represented by the CIF file [CIF]
data_K5As4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.184
_cell_length_b   6.384
_cell_length_c   10.111
_cell_angle_alpha   86.589
_cell_angle_beta   75.147
_cell_angle_gamma   113.952
_symmetry_Int_Tables_number   1
_cell_volume   290.463
_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
  K  K0  1  0.709  0.314  0.897  1.0
  K  K1  1  0.292  0.683  0.099  1.0
  K  K2  1  0.583  0.834  0.667  1.0
  K  K3  1  0.414  0.157  0.330  1.0
  K  K4  1  0.997  0.490  0.495  1.0
  As  As5  1  0.011  0.913  0.891  1.0
  As  As6  1  0.989  0.084  0.106  1.0
  As  As7  1  0.267  0.221  0.688  1.0
  As  As8  1  0.733  0.774  0.309  1.0
[/CIF]
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