The material described by K3AlTe3 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one Al(1), two equivalent Te(1), two equivalent Te(2), and two equivalent Te(3) atoms. In the second K site, K(2) is bonded to one Te(1), two equivalent Te(2), and two equivalent Te(3) atoms to form distorted KTe5 trigonal bipyramids that share corners with four equivalent Al(1)KTe4 tetrahedra, corners with two equivalent K(2)Te5 trigonal bipyramids,  an edgeedge with one Al(1)KTe4 tetrahedra, and  an edgeedge with one K(2)Te5 trigonal bipyramid. In the third K site, K(3) is bonded in a 4-coordinate geometry to two equivalent Te(1), two equivalent Te(2), and two equivalent Te(3) atoms. Al(1) is bonded to one K(1), one Te(2), one Te(3), and two equivalent Te(1) atoms to form distorted AlKTe4 tetrahedra that share corners with four equivalent K(2)Te5 trigonal bipyramids,  an edgeedge with one Al(1)KTe4 tetrahedra, and  an edgeedge with one K(2)Te5 trigonal bipyramid. There are three inequivalent Te sites. In the first Te site, Te(1) is bonded in a 7-coordinate geometry to one K(2), two equivalent K(1), two equivalent K(3), and two equivalent Al(1) atoms. In the second Te site, Te(2) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Al(1) atom. In the third Te site, Te(3) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Al(1) atom. is represented by the CIF file [CIF]
data_K3AlTe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.039
_cell_length_b   8.678
_cell_length_c   11.173
_cell_angle_alpha   52.617
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1081.647
_cell_formula_units_Z   4
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  0.312  0.148  0.072  1.0
  K  K1  1  0.688  0.852  0.928  1.0
  K  K2  1  0.812  0.852  0.428  1.0
  K  K3  1  0.896  0.319  0.403  1.0
  K  K4  1  0.613  0.361  0.474  1.0
  K  K5  1  0.113  0.639  0.026  1.0
  K  K6  1  0.387  0.639  0.526  1.0
  K  K7  1  0.887  0.361  0.974  1.0
  K  K8  1  0.604  0.319  0.903  1.0
  K  K9  1  0.104  0.681  0.597  1.0
  K  K10  1  0.396  0.681  0.097  1.0
  K  K11  1  0.188  0.148  0.572  1.0
  Al  Al12  1  0.066  0.945  0.159  1.0
  Al  Al13  1  0.566  0.055  0.341  1.0
  Al  Al14  1  0.434  0.945  0.659  1.0
  Al  Al15  1  0.934  0.055  0.841  1.0
  Te  Te16  1  0.397  0.177  0.362  1.0
  Te  Te17  1  0.897  0.823  0.138  1.0
  Te  Te18  1  0.603  0.823  0.638  1.0
  Te  Te19  1  0.103  0.177  0.862  1.0
  Te  Te20  1  0.693  0.330  0.195  1.0
  Te  Te21  1  0.193  0.670  0.305  1.0
  Te  Te22  1  0.307  0.670  0.805  1.0
  Te  Te23  1  0.807  0.330  0.695  1.0
  Te  Te24  1  0.555  0.860  0.235  1.0
  Te  Te25  1  0.055  0.140  0.265  1.0
  Te  Te26  1  0.445  0.140  0.765  1.0
  Te  Te27  1  0.945  0.860  0.735  1.0
[/CIF]
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The material described by K3AlTe3 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one Al(1), two equivalent Te(1), two equivalent Te(2), and two equivalent Te(3) atoms. In the second K site, K(2) is bonded to one Te(1), two equivalent Te(2), and two equivalent Te(3) atoms to form distorted KTe5 trigonal bipyramids that share corners with four equivalent Al(1)KTe4 tetrahedra, corners with two equivalent K(2)Te5 trigonal bipyramids,  an edgeedge with one Al(1)KTe4 tetrahedra, and  an edgeedge with one K(2)Te5 trigonal bipyramid. In the third K site, K(3) is bonded in a 4-coordinate geometry to two equivalent Te(1), two equivalent Te(2), and two equivalent Te(3) atoms. Al(1) is bonded to one K(1), one Te(2), one Te(3), and two equivalent Te(1) atoms to form distorted AlKTe4 tetrahedra that share corners with four equivalent K(2)Te5 trigonal bipyramids,  an edgeedge with one Al(1)KTe4 tetrahedra, and  an edgeedge with one K(2)Te5 trigonal bipyramid. There are three inequivalent Te sites. In the first Te site, Te(1) is bonded in a 7-coordinate geometry to one K(2), two equivalent K(1), two equivalent K(3), and two equivalent Al(1) atoms. In the second Te site, Te(2) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Al(1) atom. In the third Te site, Te(3) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Al(1) atom. is represented by the CIF file [CIF]
data_K3AlTe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.039
_cell_length_b   8.678
_cell_length_c   11.173
_cell_angle_alpha   52.617
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1081.647
_cell_formula_units_Z   4
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  0.312  0.148  0.072  1.0
  K  K1  1  0.688  0.852  0.928  1.0
  K  K2  1  0.812  0.852  0.428  1.0
  K  K3  1  0.896  0.319  0.403  1.0
  K  K4  1  0.613  0.361  0.474  1.0
  K  K5  1  0.113  0.639  0.026  1.0
  K  K6  1  0.387  0.639  0.526  1.0
  K  K7  1  0.887  0.361  0.974  1.0
  K  K8  1  0.604  0.319  0.903  1.0
  K  K9  1  0.104  0.681  0.597  1.0
  K  K10  1  0.396  0.681  0.097  1.0
  K  K11  1  0.188  0.148  0.572  1.0
  Al  Al12  1  0.066  0.945  0.159  1.0
  Al  Al13  1  0.566  0.055  0.341  1.0
  Al  Al14  1  0.434  0.945  0.659  1.0
  Al  Al15  1  0.934  0.055  0.841  1.0
  Te  Te16  1  0.397  0.177  0.362  1.0
  Te  Te17  1  0.897  0.823  0.138  1.0
  Te  Te18  1  0.603  0.823  0.638  1.0
  Te  Te19  1  0.103  0.177  0.862  1.0
  Te  Te20  1  0.693  0.330  0.195  1.0
  Te  Te21  1  0.193  0.670  0.305  1.0
  Te  Te22  1  0.307  0.670  0.805  1.0
  Te  Te23  1  0.807  0.330  0.695  1.0
  Te  Te24  1  0.555  0.860  0.235  1.0
  Te  Te25  1  0.055  0.140  0.265  1.0
  Te  Te26  1  0.445  0.140  0.765  1.0
  Te  Te27  1  0.945  0.860  0.735  1.0
[/CIF]
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