The material described by K2CeAg3Te4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one Ag(2), two equivalent Te(1), two equivalent Te(2), and three equivalent Te(3) atoms. In the second K site, K(2) is bonded in a 12-coordinate geometry to one Ag(3), two equivalent Ag(2), three equivalent Ag(1), two equivalent Te(1), two equivalent Te(2), and two equivalent Te(4) atoms. Ce(1) is bonded to two equivalent Ag(1), two equivalent Ag(2), one Te(3), one Te(4), two equivalent Te(1), and two equivalent Te(2) atoms to form distorted CeAg4Te6 octahedra that share corners with two equivalent Te(2)K4Ce2Ag pentagonal bipyramids and faces with two equivalent Ce(1)Ag4Te6 octahedra. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 12-coordinate geometry to three equivalent K(2), two equivalent Ce(1), one Ag(3), two equivalent Ag(1), one Te(2), and three equivalent Te(4) atoms. In the second Ag site, Ag(2) is bonded in a 11-coordinate geometry to one K(1), two equivalent K(2), two equivalent Ce(1), two equivalent Ag(3), one Te(1), one Te(4), and two equivalent Te(3) atoms. In the third Ag site, Ag(3) is bonded in a 5-coordinate geometry to one K(2), one Ag(1), two equivalent Ag(2), one Te(1), one Te(3), and two equivalent Te(4) atoms. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded in a 8-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent Ce(1), one Ag(2), and one Ag(3) atom. In the second Te site, Te(2) is bonded to two equivalent K(1), two equivalent K(2), two equivalent Ce(1), and one Ag(1) atom to form distorted TeK4Ce2Ag pentagonal bipyramids that share corners with two equivalent Ce(1)Ag4Te6 octahedra and faces with two equivalent Te(2)K4Ce2Ag pentagonal bipyramids. The corner-sharing octahedral tilt angles are 126°. In the third Te site, Te(3) is bonded in a 7-coordinate geometry to three equivalent K(1), one Ce(1), one Ag(3), and two equivalent Ag(2) atoms. In the fourth Te site, Te(4) is bonded in a 9-coordinate geometry to two equivalent K(2), one Ce(1), one Ag(2), two equivalent Ag(3), and three equivalent Ag(1) atoms. is represented by the CIF file [CIF]
data_K2CeAg3Te4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.680
_cell_length_b   15.515
_cell_length_c   17.343
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1259.154
_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  0.750  0.101  0.918  1.0
  K  K1  1  0.250  0.656  0.116  1.0
  K  K2  1  0.250  0.601  0.582  1.0
  K  K3  1  0.250  0.899  0.082  1.0
  K  K4  1  0.250  0.844  0.616  1.0
  K  K5  1  0.750  0.399  0.418  1.0
  K  K6  1  0.750  0.156  0.384  1.0
  K  K7  1  0.750  0.344  0.884  1.0
  Ce  Ce8  1  0.250  0.772  0.357  1.0
  Ce  Ce9  1  0.250  0.728  0.857  1.0
  Ce  Ce10  1  0.750  0.228  0.643  1.0
  Ce  Ce11  1  0.750  0.272  0.143  1.0
  Ag  Ag12  1  0.750  0.570  0.968  1.0
  Ag  Ag13  1  0.750  0.902  0.777  1.0
  Ag  Ag14  1  0.250  0.098  0.223  1.0
  Ag  Ag15  1  0.250  0.402  0.723  1.0
  Ag  Ag16  1  0.750  0.598  0.277  1.0
  Ag  Ag17  1  0.250  0.070  0.532  1.0
  Ag  Ag18  1  0.250  0.453  0.227  1.0
  Ag  Ag19  1  0.750  0.547  0.773  1.0
  Ag  Ag20  1  0.250  0.430  0.032  1.0
  Ag  Ag21  1  0.250  0.047  0.727  1.0
  Ag  Ag22  1  0.750  0.953  0.273  1.0
  Ag  Ag23  1  0.750  0.930  0.468  1.0
  Te  Te24  1  0.750  0.777  0.227  1.0
  Te  Te25  1  0.750  0.750  0.482  1.0
  Te  Te26  1  0.250  0.939  0.862  1.0
  Te  Te27  1  0.250  0.984  0.376  1.0
  Te  Te28  1  0.250  0.223  0.773  1.0
  Te  Te29  1  0.250  0.561  0.362  1.0
  Te  Te30  1  0.250  0.250  0.018  1.0
  Te  Te31  1  0.750  0.016  0.624  1.0
  Te  Te32  1  0.750  0.439  0.638  1.0
  Te  Te33  1  0.750  0.061  0.138  1.0
  Te  Te34  1  0.250  0.277  0.273  1.0
  Te  Te35  1  0.250  0.250  0.518  1.0
  Te  Te36  1  0.250  0.516  0.876  1.0
  Te  Te37  1  0.750  0.723  0.727  1.0
  Te  Te38  1  0.750  0.750  0.982  1.0
  Te  Te39  1  0.750  0.484  0.124  1.0
[/CIF]
.
The material described by K2CeAg3Te4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one Ag(2), two equivalent Te(1), two equivalent Te(2), and three equivalent Te(3) atoms. In the second K site, K(2) is bonded in a 12-coordinate geometry to one Ag(3), two equivalent Ag(2), three equivalent Ag(1), two equivalent Te(1), two equivalent Te(2), and two equivalent Te(4) atoms. Ce(1) is bonded to two equivalent Ag(1), two equivalent Ag(2), one Te(3), one Te(4), two equivalent Te(1), and two equivalent Te(2) atoms to form distorted CeAg4Te6 octahedra that share corners with two equivalent Te(2)K4Ce2Ag pentagonal bipyramids and faces with two equivalent Ce(1)Ag4Te6 octahedra. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 12-coordinate geometry to three equivalent K(2), two equivalent Ce(1), one Ag(3), two equivalent Ag(1), one Te(2), and three equivalent Te(4) atoms. In the second Ag site, Ag(2) is bonded in a 11-coordinate geometry to one K(1), two equivalent K(2), two equivalent Ce(1), two equivalent Ag(3), one Te(1), one Te(4), and two equivalent Te(3) atoms. In the third Ag site, Ag(3) is bonded in a 5-coordinate geometry to one K(2), one Ag(1), two equivalent Ag(2), one Te(1), one Te(3), and two equivalent Te(4) atoms. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded in a 8-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent Ce(1), one Ag(2), and one Ag(3) atom. In the second Te site, Te(2) is bonded to two equivalent K(1), two equivalent K(2), two equivalent Ce(1), and one Ag(1) atom to form distorted TeK4Ce2Ag pentagonal bipyramids that share corners with two equivalent Ce(1)Ag4Te6 octahedra and faces with two equivalent Te(2)K4Ce2Ag pentagonal bipyramids. The corner-sharing octahedral tilt angles are 126°. In the third Te site, Te(3) is bonded in a 7-coordinate geometry to three equivalent K(1), one Ce(1), one Ag(3), and two equivalent Ag(2) atoms. In the fourth Te site, Te(4) is bonded in a 9-coordinate geometry to two equivalent K(2), one Ce(1), one Ag(2), two equivalent Ag(3), and three equivalent Ag(1) atoms. is represented by the CIF file [CIF]
data_K2CeAg3Te4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.680
_cell_length_b   15.515
_cell_length_c   17.343
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1259.154
_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  0.750  0.101  0.918  1.0
  K  K1  1  0.250  0.656  0.116  1.0
  K  K2  1  0.250  0.601  0.582  1.0
  K  K3  1  0.250  0.899  0.082  1.0
  K  K4  1  0.250  0.844  0.616  1.0
  K  K5  1  0.750  0.399  0.418  1.0
  K  K6  1  0.750  0.156  0.384  1.0
  K  K7  1  0.750  0.344  0.884  1.0
  Ce  Ce8  1  0.250  0.772  0.357  1.0
  Ce  Ce9  1  0.250  0.728  0.857  1.0
  Ce  Ce10  1  0.750  0.228  0.643  1.0
  Ce  Ce11  1  0.750  0.272  0.143  1.0
  Ag  Ag12  1  0.750  0.570  0.968  1.0
  Ag  Ag13  1  0.750  0.902  0.777  1.0
  Ag  Ag14  1  0.250  0.098  0.223  1.0
  Ag  Ag15  1  0.250  0.402  0.723  1.0
  Ag  Ag16  1  0.750  0.598  0.277  1.0
  Ag  Ag17  1  0.250  0.070  0.532  1.0
  Ag  Ag18  1  0.250  0.453  0.227  1.0
  Ag  Ag19  1  0.750  0.547  0.773  1.0
  Ag  Ag20  1  0.250  0.430  0.032  1.0
  Ag  Ag21  1  0.250  0.047  0.727  1.0
  Ag  Ag22  1  0.750  0.953  0.273  1.0
  Ag  Ag23  1  0.750  0.930  0.468  1.0
  Te  Te24  1  0.750  0.777  0.227  1.0
  Te  Te25  1  0.750  0.750  0.482  1.0
  Te  Te26  1  0.250  0.939  0.862  1.0
  Te  Te27  1  0.250  0.984  0.376  1.0
  Te  Te28  1  0.250  0.223  0.773  1.0
  Te  Te29  1  0.250  0.561  0.362  1.0
  Te  Te30  1  0.250  0.250  0.018  1.0
  Te  Te31  1  0.750  0.016  0.624  1.0
  Te  Te32  1  0.750  0.439  0.638  1.0
  Te  Te33  1  0.750  0.061  0.138  1.0
  Te  Te34  1  0.250  0.277  0.273  1.0
  Te  Te35  1  0.250  0.250  0.518  1.0
  Te  Te36  1  0.250  0.516  0.876  1.0
  Te  Te37  1  0.750  0.723  0.727  1.0
  Te  Te38  1  0.750  0.750  0.982  1.0
  Te  Te39  1  0.750  0.484  0.124  1.0
[/CIF]
.