The compound described by KAlSi2 crystallizes in the tetragonal I4_1/acd space group. K(1) is bonded in a 9-coordinate geometry to three equivalent Al(1) and six equivalent Si(1) atoms. Al(1) is bonded in a 7-coordinate geometry to three equivalent K(1) and four equivalent Si(1) atoms. Si(1) is bonded in a 7-coordinate geometry to three equivalent K(1), two equivalent Al(1), and two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_KAlSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.717
_cell_length_b   9.717
_cell_length_c   9.717
_cell_angle_alpha   109.646
_cell_angle_beta   109.646
_cell_angle_gamma   109.122
_symmetry_Int_Tables_number   1
_cell_volume   706.210
_cell_formula_units_Z   8
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  0.877  0.623  0.500  1.0
  K  K1  1  0.123  0.377  0.500  1.0
  K  K2  1  0.627  0.873  0.000  1.0
  K  K3  1  0.873  0.627  0.000  1.0
  K  K4  1  0.377  0.877  0.253  1.0
  K  K5  1  0.623  0.123  0.747  1.0
  K  K6  1  0.127  0.127  0.753  1.0
  K  K7  1  0.373  0.373  0.247  1.0
  Al  Al8  1  0.666  0.834  0.500  1.0
  Al  Al9  1  0.334  0.166  0.500  1.0
  Al  Al10  1  0.416  0.084  0.000  1.0
  Al  Al11  1  0.084  0.416  0.000  1.0
  Al  Al12  1  0.166  0.666  0.833  1.0
  Al  Al13  1  0.834  0.334  0.167  1.0
  Al  Al14  1  0.916  0.916  0.333  1.0
  Al  Al15  1  0.584  0.584  0.667  1.0
  Si  Si16  1  0.841  0.879  0.797  1.0
  Si  Si17  1  0.082  0.044  0.203  1.0
  Si  Si18  1  0.668  0.206  0.297  1.0
  Si  Si19  1  0.909  0.371  0.703  1.0
  Si  Si20  1  0.121  0.918  0.962  1.0
  Si  Si21  1  0.956  0.159  0.038  1.0
  Si  Si22  1  0.794  0.091  0.462  1.0
  Si  Si23  1  0.629  0.332  0.538  1.0
  Si  Si24  1  0.341  0.544  0.962  1.0
  Si  Si25  1  0.582  0.379  0.038  1.0
  Si  Si26  1  0.168  0.871  0.462  1.0
  Si  Si27  1  0.409  0.706  0.538  1.0
  Si  Si28  1  0.456  0.418  0.797  1.0
  Si  Si29  1  0.621  0.659  0.203  1.0
  Si  Si30  1  0.129  0.591  0.297  1.0
  Si  Si31  1  0.294  0.832  0.703  1.0
[/CIF]
.
The compound described by KAlSi2 crystallizes in the tetragonal I4_1/acd space group. K(1) is bonded in a 9-coordinate geometry to three equivalent Al(1) and six equivalent Si(1) atoms. Al(1) is bonded in a 7-coordinate geometry to three equivalent K(1) and four equivalent Si(1) atoms. Si(1) is bonded in a 7-coordinate geometry to three equivalent K(1), two equivalent Al(1), and two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_KAlSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.717
_cell_length_b   9.717
_cell_length_c   9.717
_cell_angle_alpha   109.646
_cell_angle_beta   109.646
_cell_angle_gamma   109.122
_symmetry_Int_Tables_number   1
_cell_volume   706.210
_cell_formula_units_Z   8
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  0.877  0.623  0.500  1.0
  K  K1  1  0.123  0.377  0.500  1.0
  K  K2  1  0.627  0.873  0.000  1.0
  K  K3  1  0.873  0.627  0.000  1.0
  K  K4  1  0.377  0.877  0.253  1.0
  K  K5  1  0.623  0.123  0.747  1.0
  K  K6  1  0.127  0.127  0.753  1.0
  K  K7  1  0.373  0.373  0.247  1.0
  Al  Al8  1  0.666  0.834  0.500  1.0
  Al  Al9  1  0.334  0.166  0.500  1.0
  Al  Al10  1  0.416  0.084  0.000  1.0
  Al  Al11  1  0.084  0.416  0.000  1.0
  Al  Al12  1  0.166  0.666  0.833  1.0
  Al  Al13  1  0.834  0.334  0.167  1.0
  Al  Al14  1  0.916  0.916  0.333  1.0
  Al  Al15  1  0.584  0.584  0.667  1.0
  Si  Si16  1  0.841  0.879  0.797  1.0
  Si  Si17  1  0.082  0.044  0.203  1.0
  Si  Si18  1  0.668  0.206  0.297  1.0
  Si  Si19  1  0.909  0.371  0.703  1.0
  Si  Si20  1  0.121  0.918  0.962  1.0
  Si  Si21  1  0.956  0.159  0.038  1.0
  Si  Si22  1  0.794  0.091  0.462  1.0
  Si  Si23  1  0.629  0.332  0.538  1.0
  Si  Si24  1  0.341  0.544  0.962  1.0
  Si  Si25  1  0.582  0.379  0.038  1.0
  Si  Si26  1  0.168  0.871  0.462  1.0
  Si  Si27  1  0.409  0.706  0.538  1.0
  Si  Si28  1  0.456  0.418  0.797  1.0
  Si  Si29  1  0.621  0.659  0.203  1.0
  Si  Si30  1  0.129  0.591  0.297  1.0
  Si  Si31  1  0.294  0.832  0.703  1.0
[/CIF]
.