The material structure described by K6Mg(SbO4)2 crystallizes in the triclinic P1 space group. There are six inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(3), one O(4), one O(5), one O(6), and one O(7) atom. In the second K site, K(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form distorted KO4 tetrahedra that share corners with two equivalent Sb(1)O6 octahedra,  a cornercorner with one K(4)O5 trigonal bipyramid, and  an edgeedge with one K(4)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 15-56°. In the third K site, K(3) is bonded in a 4-coordinate geometry to one O(3), one O(5), one O(6), one O(7), and one O(8) atom. In the fourth K site, K(4) is bonded to one O(1), one O(2), one O(4), one O(5), and one O(6) atom to form distorted KO5 trigonal bipyramids that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one K(2)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra, and  an edgeedge with one K(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 28°. In the fifth K site, K(5) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), one O(6), and one O(8) atom. In the sixth K site, K(6) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(5), one O(7), and one O(8) atom. Mg(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(4), one O(7), and one O(8) atom. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form SbO6 octahedra that share corners with two equivalent K(2)O4 tetrahedra,  a cornercorner with one K(4)O5 trigonal bipyramid, and  an edgeedge with one K(4)O5 trigonal bipyramid. In the second Sb site, Sb(2) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(5), and one O(6) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one K(4), one K(5), one K(6), one Mg(1), and one Sb(1) atom. In the second O site, O(2) is bonded to one K(4), one K(5), one K(6), one Sb(1), and one Sb(2) atom to form distorted edge-sharing OK3Sb2 trigonal bipyramids. In the third O site, O(3) is bonded to one K(1), one K(2), one K(3), one K(5), and one Sb(1) atom to form distorted edge-sharing OK4Sb trigonal bipyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one K(1), one K(2), one K(4), one Mg(1), and one Sb(1) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one K(1), one K(2), one K(3), one K(4), one K(6), and one Sb(2) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one K(1), one K(2), one K(3), one K(4), one K(5), and one Sb(2) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one K(1), one K(3), one K(6), one Mg(1), and one Sb(1) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one K(3), one K(5), one K(6), one Mg(1), and one Sb(1) atom. is represented by the CIF file [CIF]
data_K6Mg(SbO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.205
_cell_length_b   6.101
_cell_length_c   8.425
_cell_angle_alpha   81.002
_cell_angle_beta   103.783
_cell_angle_gamma   114.950
_symmetry_Int_Tables_number   1
_cell_volume   325.440
_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  0.803  0.212  0.489  1.0
  K  K1  1  0.243  0.931  0.457  1.0
  K  K2  1  0.322  0.486  0.329  1.0
  K  K3  1  0.850  0.691  0.705  1.0
  K  K4  1  0.280  0.911  0.015  1.0
  K  K5  1  0.719  0.054  0.861  1.0
  Mg  Mg6  1  0.808  0.928  0.201  1.0
  Sb  Sb7  1  0.698  0.472  0.144  1.0
  Sb  Sb8  1  0.320  0.454  0.788  1.0
  O  O9  1  0.910  0.777  0.052  1.0
  O  O10  1  0.555  0.349  0.904  1.0
  O  O11  1  0.486  0.205  0.252  1.0
  O  O12  1  0.832  0.658  0.366  1.0
  O  O13  1  0.478  0.708  0.637  1.0
  O  O14  1  0.162  0.171  0.652  1.0
  O  O15  1  0.877  0.275  0.182  1.0
  O  O16  1  0.530  0.689  0.092  1.0
[/CIF]
.
The material structure described by K6Mg(SbO4)2 crystallizes in the triclinic P1 space group. There are six inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(3), one O(4), one O(5), one O(6), and one O(7) atom. In the second K site, K(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form distorted KO4 tetrahedra that share corners with two equivalent Sb(1)O6 octahedra,  a cornercorner with one K(4)O5 trigonal bipyramid, and  an edgeedge with one K(4)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 15-56°. In the third K site, K(3) is bonded in a 4-coordinate geometry to one O(3), one O(5), one O(6), one O(7), and one O(8) atom. In the fourth K site, K(4) is bonded to one O(1), one O(2), one O(4), one O(5), and one O(6) atom to form distorted KO5 trigonal bipyramids that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one K(2)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra, and  an edgeedge with one K(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 28°. In the fifth K site, K(5) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), one O(6), and one O(8) atom. In the sixth K site, K(6) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(5), one O(7), and one O(8) atom. Mg(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(4), one O(7), and one O(8) atom. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form SbO6 octahedra that share corners with two equivalent K(2)O4 tetrahedra,  a cornercorner with one K(4)O5 trigonal bipyramid, and  an edgeedge with one K(4)O5 trigonal bipyramid. In the second Sb site, Sb(2) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(5), and one O(6) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one K(4), one K(5), one K(6), one Mg(1), and one Sb(1) atom. In the second O site, O(2) is bonded to one K(4), one K(5), one K(6), one Sb(1), and one Sb(2) atom to form distorted edge-sharing OK3Sb2 trigonal bipyramids. In the third O site, O(3) is bonded to one K(1), one K(2), one K(3), one K(5), and one Sb(1) atom to form distorted edge-sharing OK4Sb trigonal bipyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one K(1), one K(2), one K(4), one Mg(1), and one Sb(1) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one K(1), one K(2), one K(3), one K(4), one K(6), and one Sb(2) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one K(1), one K(2), one K(3), one K(4), one K(5), and one Sb(2) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one K(1), one K(3), one K(6), one Mg(1), and one Sb(1) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one K(3), one K(5), one K(6), one Mg(1), and one Sb(1) atom. is represented by the CIF file [CIF]
data_K6Mg(SbO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.205
_cell_length_b   6.101
_cell_length_c   8.425
_cell_angle_alpha   81.002
_cell_angle_beta   103.783
_cell_angle_gamma   114.950
_symmetry_Int_Tables_number   1
_cell_volume   325.440
_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  0.803  0.212  0.489  1.0
  K  K1  1  0.243  0.931  0.457  1.0
  K  K2  1  0.322  0.486  0.329  1.0
  K  K3  1  0.850  0.691  0.705  1.0
  K  K4  1  0.280  0.911  0.015  1.0
  K  K5  1  0.719  0.054  0.861  1.0
  Mg  Mg6  1  0.808  0.928  0.201  1.0
  Sb  Sb7  1  0.698  0.472  0.144  1.0
  Sb  Sb8  1  0.320  0.454  0.788  1.0
  O  O9  1  0.910  0.777  0.052  1.0
  O  O10  1  0.555  0.349  0.904  1.0
  O  O11  1  0.486  0.205  0.252  1.0
  O  O12  1  0.832  0.658  0.366  1.0
  O  O13  1  0.478  0.708  0.637  1.0
  O  O14  1  0.162  0.171  0.652  1.0
  O  O15  1  0.877  0.275  0.182  1.0
  O  O16  1  0.530  0.689  0.092  1.0
[/CIF]
.