The structure described by K6Na14MgTl18 crystallizes in the cubic Pm-3 space group. K(1) is bonded in a 15-coordinate geometry to one K(1), four equivalent Na(1), four equivalent Na(2), and six equivalent Tl(2) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to three equivalent K(1), three equivalent Tl(1), and three equivalent Tl(2) atoms. In the second Na site, Na(2) is bonded to four equivalent K(1), two equivalent Tl(1), and two equivalent Tl(2) atoms to form distorted NaK4Tl4 tetrahedra that share corners with two equivalent Mg(1)Tl12 cuboctahedra, corners with eight equivalent Na(2)K4Tl4 tetrahedra,  an edgeedge with one Na(2)K4Tl4 tetrahedra, and  a faceface with one Na(2)K4Tl4 tetrahedra. Mg(1) is bonded to twelve equivalent Tl(2) atoms to form MgTl12 cuboctahedra that share corners with twelve equivalent Na(2)K4Tl4 tetrahedra. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a 6-coordinate geometry to two equivalent Na(2) and four equivalent Na(1) atoms. In the second Tl site, Tl(2) is bonded in a 12-coordinate geometry to three equivalent K(1), one Na(2), two equivalent Na(1), one Mg(1), and five equivalent Tl(2) atoms. is represented by the CIF card [CIF]
data_K6Na14MgTl18
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.601
_cell_length_b   10.601
_cell_length_c   10.601
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1191.500
_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  0.500  0.187  0.000  1.0
  K  K1  1  0.500  0.813  0.000  1.0
  K  K2  1  0.000  0.500  0.187  1.0
  K  K3  1  0.000  0.500  0.813  1.0
  K  K4  1  0.187  0.000  0.500  1.0
  K  K5  1  0.813  0.000  0.500  1.0
  Na  Na6  1  0.719  0.281  0.281  1.0
  Na  Na7  1  0.281  0.281  0.719  1.0
  Na  Na8  1  0.281  0.719  0.281  1.0
  Na  Na9  1  0.719  0.719  0.719  1.0
  Na  Na10  1  0.281  0.719  0.719  1.0
  Na  Na11  1  0.719  0.719  0.281  1.0
  Na  Na12  1  0.719  0.281  0.719  1.0
  Na  Na13  1  0.281  0.281  0.281  1.0
  Na  Na14  1  0.000  0.331  0.500  1.0
  Na  Na15  1  0.000  0.669  0.500  1.0
  Na  Na16  1  0.500  0.000  0.331  1.0
  Na  Na17  1  0.500  0.000  0.669  1.0
  Na  Na18  1  0.331  0.500  0.000  1.0
  Na  Na19  1  0.669  0.500  0.000  1.0
  Mg  Mg20  1  0.000  0.000  0.000  1.0
  Tl  Tl21  1  0.500  0.280  0.500  1.0
  Tl  Tl22  1  0.500  0.720  0.500  1.0
  Tl  Tl23  1  0.500  0.500  0.280  1.0
  Tl  Tl24  1  0.500  0.500  0.720  1.0
  Tl  Tl25  1  0.280  0.500  0.500  1.0
  Tl  Tl26  1  0.720  0.500  0.500  1.0
  Tl  Tl27  1  0.746  0.000  0.155  1.0
  Tl  Tl28  1  0.254  0.000  0.845  1.0
  Tl  Tl29  1  0.254  0.000  0.155  1.0
  Tl  Tl30  1  0.746  0.000  0.845  1.0
  Tl  Tl31  1  0.155  0.746  0.000  1.0
  Tl  Tl32  1  0.845  0.254  0.000  1.0
  Tl  Tl33  1  0.155  0.254  0.000  1.0
  Tl  Tl34  1  0.845  0.746  0.000  1.0
  Tl  Tl35  1  0.000  0.155  0.746  1.0
  Tl  Tl36  1  0.000  0.845  0.254  1.0
  Tl  Tl37  1  0.000  0.155  0.254  1.0
  Tl  Tl38  1  0.000  0.845  0.746  1.0
[/CIF]
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The structure described by K6Na14MgTl18 crystallizes in the cubic Pm-3 space group. K(1) is bonded in a 15-coordinate geometry to one K(1), four equivalent Na(1), four equivalent Na(2), and six equivalent Tl(2) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to three equivalent K(1), three equivalent Tl(1), and three equivalent Tl(2) atoms. In the second Na site, Na(2) is bonded to four equivalent K(1), two equivalent Tl(1), and two equivalent Tl(2) atoms to form distorted NaK4Tl4 tetrahedra that share corners with two equivalent Mg(1)Tl12 cuboctahedra, corners with eight equivalent Na(2)K4Tl4 tetrahedra,  an edgeedge with one Na(2)K4Tl4 tetrahedra, and  a faceface with one Na(2)K4Tl4 tetrahedra. Mg(1) is bonded to twelve equivalent Tl(2) atoms to form MgTl12 cuboctahedra that share corners with twelve equivalent Na(2)K4Tl4 tetrahedra. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a 6-coordinate geometry to two equivalent Na(2) and four equivalent Na(1) atoms. In the second Tl site, Tl(2) is bonded in a 12-coordinate geometry to three equivalent K(1), one Na(2), two equivalent Na(1), one Mg(1), and five equivalent Tl(2) atoms. is represented by the CIF card [CIF]
data_K6Na14MgTl18
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.601
_cell_length_b   10.601
_cell_length_c   10.601
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1191.500
_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  0.500  0.187  0.000  1.0
  K  K1  1  0.500  0.813  0.000  1.0
  K  K2  1  0.000  0.500  0.187  1.0
  K  K3  1  0.000  0.500  0.813  1.0
  K  K4  1  0.187  0.000  0.500  1.0
  K  K5  1  0.813  0.000  0.500  1.0
  Na  Na6  1  0.719  0.281  0.281  1.0
  Na  Na7  1  0.281  0.281  0.719  1.0
  Na  Na8  1  0.281  0.719  0.281  1.0
  Na  Na9  1  0.719  0.719  0.719  1.0
  Na  Na10  1  0.281  0.719  0.719  1.0
  Na  Na11  1  0.719  0.719  0.281  1.0
  Na  Na12  1  0.719  0.281  0.719  1.0
  Na  Na13  1  0.281  0.281  0.281  1.0
  Na  Na14  1  0.000  0.331  0.500  1.0
  Na  Na15  1  0.000  0.669  0.500  1.0
  Na  Na16  1  0.500  0.000  0.331  1.0
  Na  Na17  1  0.500  0.000  0.669  1.0
  Na  Na18  1  0.331  0.500  0.000  1.0
  Na  Na19  1  0.669  0.500  0.000  1.0
  Mg  Mg20  1  0.000  0.000  0.000  1.0
  Tl  Tl21  1  0.500  0.280  0.500  1.0
  Tl  Tl22  1  0.500  0.720  0.500  1.0
  Tl  Tl23  1  0.500  0.500  0.280  1.0
  Tl  Tl24  1  0.500  0.500  0.720  1.0
  Tl  Tl25  1  0.280  0.500  0.500  1.0
  Tl  Tl26  1  0.720  0.500  0.500  1.0
  Tl  Tl27  1  0.746  0.000  0.155  1.0
  Tl  Tl28  1  0.254  0.000  0.845  1.0
  Tl  Tl29  1  0.254  0.000  0.155  1.0
  Tl  Tl30  1  0.746  0.000  0.845  1.0
  Tl  Tl31  1  0.155  0.746  0.000  1.0
  Tl  Tl32  1  0.845  0.254  0.000  1.0
  Tl  Tl33  1  0.155  0.254  0.000  1.0
  Tl  Tl34  1  0.845  0.746  0.000  1.0
  Tl  Tl35  1  0.000  0.155  0.746  1.0
  Tl  Tl36  1  0.000  0.845  0.254  1.0
  Tl  Tl37  1  0.000  0.155  0.254  1.0
  Tl  Tl38  1  0.000  0.845  0.746  1.0
[/CIF]
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