The compound described by K2Mg5Sn3 crystallizes in the tetragonal I4/mmm space group. K(1) is bonded in a 9-coordinate geometry to four equivalent Mg(1) and five equivalent Sn(2) atoms. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent K(1), two equivalent Mg(2), two equivalent Sn(1), and two equivalent Sn(2) atoms to form a mixture of distorted corner, edge, and face-sharing MgK2Mg2Sn4 tetrahedra. In the second Mg site, Mg(2) is bonded in a 14-coordinate geometry to eight equivalent Mg(1), two equivalent Sn(2), and four equivalent Sn(1) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a body-centered cubic geometry to four equivalent Mg(2) and eight equivalent Mg(1) atoms. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to five equivalent K(1), one Mg(2), and four equivalent Mg(1) atoms. is represented by the CIF file [CIF]
data_K2Mg5Sn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.174
_cell_length_b   12.174
_cell_length_c   12.174
_cell_angle_alpha   156.465
_cell_angle_beta   156.465
_cell_angle_gamma   33.526
_symmetry_Int_Tables_number   1
_cell_volume   287.397
_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  0.801  0.801  0.000  1.0
  K  K1  1  0.199  0.199  0.000  1.0
  Mg  Mg2  1  0.420  0.920  0.500  1.0
  Mg  Mg3  1  0.920  0.420  0.500  1.0
  Mg  Mg4  1  0.580  0.080  0.500  1.0
  Mg  Mg5  1  0.080  0.580  0.500  1.0
  Mg  Mg6  1  0.500  0.500  0.000  1.0
  Sn  Sn7  1  0.000  0.000  0.000  1.0
  Sn  Sn8  1  0.359  0.359  0.000  1.0
  Sn  Sn9  1  0.641  0.641  0.000  1.0
[/CIF]
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The compound described by K2Mg5Sn3 crystallizes in the tetragonal I4/mmm space group. K(1) is bonded in a 9-coordinate geometry to four equivalent Mg(1) and five equivalent Sn(2) atoms. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent K(1), two equivalent Mg(2), two equivalent Sn(1), and two equivalent Sn(2) atoms to form a mixture of distorted corner, edge, and face-sharing MgK2Mg2Sn4 tetrahedra. In the second Mg site, Mg(2) is bonded in a 14-coordinate geometry to eight equivalent Mg(1), two equivalent Sn(2), and four equivalent Sn(1) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a body-centered cubic geometry to four equivalent Mg(2) and eight equivalent Mg(1) atoms. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to five equivalent K(1), one Mg(2), and four equivalent Mg(1) atoms. is represented by the CIF file [CIF]
data_K2Mg5Sn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.174
_cell_length_b   12.174
_cell_length_c   12.174
_cell_angle_alpha   156.465
_cell_angle_beta   156.465
_cell_angle_gamma   33.526
_symmetry_Int_Tables_number   1
_cell_volume   287.397
_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  0.801  0.801  0.000  1.0
  K  K1  1  0.199  0.199  0.000  1.0
  Mg  Mg2  1  0.420  0.920  0.500  1.0
  Mg  Mg3  1  0.920  0.420  0.500  1.0
  Mg  Mg4  1  0.580  0.080  0.500  1.0
  Mg  Mg5  1  0.080  0.580  0.500  1.0
  Mg  Mg6  1  0.500  0.500  0.000  1.0
  Sn  Sn7  1  0.000  0.000  0.000  1.0
  Sn  Sn8  1  0.359  0.359  0.000  1.0
  Sn  Sn9  1  0.641  0.641  0.000  1.0
[/CIF]
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