The structure described by KMg14BiO16 is Caswellsilverite-derived structured and crystallizes in the orthorhombic Pmmm space group. K(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(8) atoms to form KO6 octahedra that share corners with two equivalent K(1)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Bi(1)O6 octahedra, edges with four equivalent Mg(3)O6 octahedra, edges with four equivalent Mg(5)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. There are eight inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(1), two equivalent O(6), and two equivalent O(9) atoms to form MgO6 octahedra that share corners with two equivalent K(1)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mg(2)O6 octahedra, edges with four equivalent Mg(4)O6 octahedra, edges with four equivalent Mg(5)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. In the second Mg site, Mg(2) is bonded to two equivalent O(2), two equivalent O(7), and two equivalent O(9) atoms to form MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; corners with two equivalent Bi(1)O6 octahedra; edges with four equivalent Mg(4)O6 octahedra; edges with four Mg(6,6)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. In the third Mg site, Mg(3) is bonded to one O(4), one O(5), two equivalent O(3), and two equivalent O(8) atoms to form MgO6 octahedra that share corners with two equivalent Mg(4)O6 octahedra; corners with four equivalent Mg(3)O6 octahedra; edges with two equivalent K(1)O6 octahedra; edges with two equivalent Mg(5)O6 octahedra; edges with two Mg(6,6)O6 octahedra; edges with two equivalent Bi(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the fourth Mg site, Mg(4) is bonded to one O(6), one O(7), two equivalent O(3), and two equivalent O(9) atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the fifth Mg site, Mg(5) is bonded to one O(4), one O(6), two equivalent O(1), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(6)O6 octahedra, corners with four equivalent Mg(5)O6 octahedra, edges with two equivalent K(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the sixth Mg site, Mg(6) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(5)O6 octahedra; corners with four Mg(6,6)O6 octahedra; edges with two equivalent Mg(2)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; edges with two equivalent Bi(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the seventh Mg site, Mg(6) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(5)O6 octahedra; corners with four Mg(6,6)O6 octahedra; edges with two equivalent Mg(2)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; edges with two equivalent Bi(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the eighth Mg site, Mg(7) is bonded to one O(1), one O(2), one O(8), one O(9), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent Mg(7)O6 octahedra,  an edgeedge with one K(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Bi(1)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, edges with two equivalent Mg(5)O6 octahedra, and edges with two equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. Bi(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms to form BiO6 octahedra that share corners with two equivalent K(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; corners with two equivalent Bi(1)O6 octahedra; edges with four equivalent Mg(3)O6 octahedra; edges with four Mg(6,6)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. There are nine inequivalent O sites. In the first O site, O(1) is bonded to one K(1), one Mg(1), two equivalent Mg(5), and two equivalent Mg(7) atoms to form OKMg5 octahedra that share corners with two equivalent O(2)Mg5Bi octahedra, corners with four equivalent O(1)KMg5 octahedra, edges with two equivalent O(4)K2Mg4 octahedra, edges with two equivalent O(8)KMg4Bi octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with two equivalent O(9)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the second O site, O(2) is bonded to one Mg(2), two equivalent Mg(6), two equivalent Mg(7), and one Bi(1) atom to form OMg5Bi octahedra that share corners with two equivalent O(1)KMg5 octahedra, corners with four equivalent O(2)Mg5Bi octahedra, edges with two equivalent O(8)KMg4Bi octahedra, edges with two equivalent O(5)Mg4Bi2 octahedra, edges with two equivalent O(7)Mg6 octahedra, edges with two equivalent O(9)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the third O site, O(3) is bonded to one Mg(3), one Mg(4), one Mg(5), one Mg(6), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with six equivalent O(3)Mg6 octahedra,  an edgeedge with one O(4)K2Mg4 octahedra,  an edgeedge with one O(5)Mg4Bi2 octahedra,  an edgeedge with one O(6)Mg6 octahedra,  an edgeedge with one O(7)Mg6 octahedra, edges with two equivalent O(8)KMg4Bi octahedra, edges with two equivalent O(1)KMg5 octahedra, edges with two equivalent O(2)Mg5Bi octahedra, and edges with two equivalent O(9)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 2-9°. In the fourth O site, O(4) is bonded to two equivalent K(1), two equivalent Mg(3), and two equivalent Mg(5) atoms to form OK2Mg4 octahedra that share corners with two equivalent O(4)K2Mg4 octahedra, corners with two equivalent O(5)Mg4Bi2 octahedra, corners with two equivalent O(6)Mg6 octahedra, edges with four equivalent O(8)KMg4Bi octahedra, edges with four equivalent O(1)KMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the fifth O site, O(5) is bonded to two equivalent Mg(3); two Mg(6,6); and two equivalent Bi(1) atoms to form OMg4Bi2 octahedra that share corners with two equivalent O(4)K2Mg4 octahedra, corners with two equivalent O(5)Mg4Bi2 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(8)KMg4Bi octahedra, edges with four equivalent O(2)Mg5Bi octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the sixth O site, O(6) is bonded to two equivalent Mg(1), two equivalent Mg(4), and two equivalent Mg(5) atoms to form OMg6 octahedra that share corners with two equivalent O(4)K2Mg4 octahedra, corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(1)KMg5 octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with four equivalent O(9)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the seventh O site, O(7) is bonded to two equivalent Mg(2); two equivalent Mg(4); and two Mg(6,6) atoms to form OMg6 octahedra that share corners with two equivalent O(5)Mg4Bi2 octahedra, corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(2)Mg5Bi octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with four equivalent O(9)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the eighth O site, O(8) is bonded to one K(1), two equivalent Mg(3), two equivalent Mg(7), and one Bi(1) atom to form OKMg4Bi octahedra that share corners with two equivalent O(9)Mg6 octahedra, corners with four equivalent O(8)KMg4Bi octahedra, edges with two equivalent O(4)K2Mg4 octahedra, edges with two equivalent O(1)KMg5 octahedra, edges with two equivalent O(5)Mg4Bi2 octahedra, edges with two equivalent O(2)Mg5Bi octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the ninth O site, O(9) is bonded to one Mg(1), one Mg(2), two equivalent Mg(4), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with two equivalent O(8)KMg4Bi octahedra, corners with four equivalent O(9)Mg6 octahedra, edges with two equivalent O(1)KMg5 octahedra, edges with two equivalent O(2)Mg5Bi octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with two equivalent O(7)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. is represented by the Crystallographic Information File (CIF) [CIF]
data_KMg14BiO16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.720
_cell_length_b   8.937
_cell_length_c   4.470
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   348.415
_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  0.000  0.000  0.000  1.0
  Mg  Mg1  1  0.500  0.000  0.000  1.0
  Mg  Mg2  1  0.500  0.500  0.000  1.0
  Mg  Mg3  1  0.000  0.232  0.500  1.0
  Mg  Mg4  1  0.000  0.768  0.500  1.0
  Mg  Mg5  1  0.500  0.247  0.500  1.0
  Mg  Mg6  1  0.500  0.753  0.500  1.0
  Mg  Mg7  1  0.254  0.000  0.500  1.0
  Mg  Mg8  1  0.264  0.500  0.500  1.0
  Mg  Mg9  1  0.746  0.000  0.500  1.0
  Mg  Mg10  1  0.736  0.500  0.500  1.0
  Mg  Mg11  1  0.259  0.240  0.000  1.0
  Mg  Mg12  1  0.259  0.760  0.000  1.0
  Mg  Mg13  1  0.741  0.240  0.000  1.0
  Mg  Mg14  1  0.741  0.760  0.000  1.0
  Bi  Bi15  1  0.000  0.500  0.000  1.0
  O  O16  1  0.277  0.000  0.000  1.0
  O  O17  1  0.269  0.500  0.000  1.0
  O  O18  1  0.723  0.000  0.000  1.0
  O  O19  1  0.731  0.500  0.000  1.0
  O  O20  1  0.250  0.251  0.500  1.0
  O  O21  1  0.250  0.749  0.500  1.0
  O  O22  1  0.750  0.251  0.500  1.0
  O  O23  1  0.750  0.749  0.500  1.0
  O  O24  1  0.000  0.000  0.500  1.0
  O  O25  1  0.000  0.500  0.500  1.0
  O  O26  1  0.500  0.000  0.500  1.0
  O  O27  1  0.500  0.500  0.500  1.0
  O  O28  1  0.000  0.254  0.000  1.0
  O  O29  1  0.000  0.746  0.000  1.0
  O  O30  1  0.500  0.253  0.000  1.0
  O  O31  1  0.500  0.747  0.000  1.0
[/CIF]
.
The structure described by KMg14BiO16 is Caswellsilverite-derived structured and crystallizes in the orthorhombic Pmmm space group. K(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(8) atoms to form KO6 octahedra that share corners with two equivalent K(1)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Bi(1)O6 octahedra, edges with four equivalent Mg(3)O6 octahedra, edges with four equivalent Mg(5)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. There are eight inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(1), two equivalent O(6), and two equivalent O(9) atoms to form MgO6 octahedra that share corners with two equivalent K(1)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mg(2)O6 octahedra, edges with four equivalent Mg(4)O6 octahedra, edges with four equivalent Mg(5)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. In the second Mg site, Mg(2) is bonded to two equivalent O(2), two equivalent O(7), and two equivalent O(9) atoms to form MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; corners with two equivalent Bi(1)O6 octahedra; edges with four equivalent Mg(4)O6 octahedra; edges with four Mg(6,6)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. In the third Mg site, Mg(3) is bonded to one O(4), one O(5), two equivalent O(3), and two equivalent O(8) atoms to form MgO6 octahedra that share corners with two equivalent Mg(4)O6 octahedra; corners with four equivalent Mg(3)O6 octahedra; edges with two equivalent K(1)O6 octahedra; edges with two equivalent Mg(5)O6 octahedra; edges with two Mg(6,6)O6 octahedra; edges with two equivalent Bi(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the fourth Mg site, Mg(4) is bonded to one O(6), one O(7), two equivalent O(3), and two equivalent O(9) atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the fifth Mg site, Mg(5) is bonded to one O(4), one O(6), two equivalent O(1), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(6)O6 octahedra, corners with four equivalent Mg(5)O6 octahedra, edges with two equivalent K(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the sixth Mg site, Mg(6) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(5)O6 octahedra; corners with four Mg(6,6)O6 octahedra; edges with two equivalent Mg(2)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; edges with two equivalent Bi(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the seventh Mg site, Mg(6) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(5)O6 octahedra; corners with four Mg(6,6)O6 octahedra; edges with two equivalent Mg(2)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; edges with two equivalent Bi(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the eighth Mg site, Mg(7) is bonded to one O(1), one O(2), one O(8), one O(9), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent Mg(7)O6 octahedra,  an edgeedge with one K(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Bi(1)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, edges with two equivalent Mg(5)O6 octahedra, and edges with two equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. Bi(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms to form BiO6 octahedra that share corners with two equivalent K(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; corners with two equivalent Bi(1)O6 octahedra; edges with four equivalent Mg(3)O6 octahedra; edges with four Mg(6,6)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. There are nine inequivalent O sites. In the first O site, O(1) is bonded to one K(1), one Mg(1), two equivalent Mg(5), and two equivalent Mg(7) atoms to form OKMg5 octahedra that share corners with two equivalent O(2)Mg5Bi octahedra, corners with four equivalent O(1)KMg5 octahedra, edges with two equivalent O(4)K2Mg4 octahedra, edges with two equivalent O(8)KMg4Bi octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with two equivalent O(9)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the second O site, O(2) is bonded to one Mg(2), two equivalent Mg(6), two equivalent Mg(7), and one Bi(1) atom to form OMg5Bi octahedra that share corners with two equivalent O(1)KMg5 octahedra, corners with four equivalent O(2)Mg5Bi octahedra, edges with two equivalent O(8)KMg4Bi octahedra, edges with two equivalent O(5)Mg4Bi2 octahedra, edges with two equivalent O(7)Mg6 octahedra, edges with two equivalent O(9)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the third O site, O(3) is bonded to one Mg(3), one Mg(4), one Mg(5), one Mg(6), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with six equivalent O(3)Mg6 octahedra,  an edgeedge with one O(4)K2Mg4 octahedra,  an edgeedge with one O(5)Mg4Bi2 octahedra,  an edgeedge with one O(6)Mg6 octahedra,  an edgeedge with one O(7)Mg6 octahedra, edges with two equivalent O(8)KMg4Bi octahedra, edges with two equivalent O(1)KMg5 octahedra, edges with two equivalent O(2)Mg5Bi octahedra, and edges with two equivalent O(9)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 2-9°. In the fourth O site, O(4) is bonded to two equivalent K(1), two equivalent Mg(3), and two equivalent Mg(5) atoms to form OK2Mg4 octahedra that share corners with two equivalent O(4)K2Mg4 octahedra, corners with two equivalent O(5)Mg4Bi2 octahedra, corners with two equivalent O(6)Mg6 octahedra, edges with four equivalent O(8)KMg4Bi octahedra, edges with four equivalent O(1)KMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the fifth O site, O(5) is bonded to two equivalent Mg(3); two Mg(6,6); and two equivalent Bi(1) atoms to form OMg4Bi2 octahedra that share corners with two equivalent O(4)K2Mg4 octahedra, corners with two equivalent O(5)Mg4Bi2 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(8)KMg4Bi octahedra, edges with four equivalent O(2)Mg5Bi octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the sixth O site, O(6) is bonded to two equivalent Mg(1), two equivalent Mg(4), and two equivalent Mg(5) atoms to form OMg6 octahedra that share corners with two equivalent O(4)K2Mg4 octahedra, corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(1)KMg5 octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with four equivalent O(9)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the seventh O site, O(7) is bonded to two equivalent Mg(2); two equivalent Mg(4); and two Mg(6,6) atoms to form OMg6 octahedra that share corners with two equivalent O(5)Mg4Bi2 octahedra, corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(2)Mg5Bi octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with four equivalent O(9)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the eighth O site, O(8) is bonded to one K(1), two equivalent Mg(3), two equivalent Mg(7), and one Bi(1) atom to form OKMg4Bi octahedra that share corners with two equivalent O(9)Mg6 octahedra, corners with four equivalent O(8)KMg4Bi octahedra, edges with two equivalent O(4)K2Mg4 octahedra, edges with two equivalent O(1)KMg5 octahedra, edges with two equivalent O(5)Mg4Bi2 octahedra, edges with two equivalent O(2)Mg5Bi octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the ninth O site, O(9) is bonded to one Mg(1), one Mg(2), two equivalent Mg(4), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with two equivalent O(8)KMg4Bi octahedra, corners with four equivalent O(9)Mg6 octahedra, edges with two equivalent O(1)KMg5 octahedra, edges with two equivalent O(2)Mg5Bi octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with two equivalent O(7)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. is represented by the Crystallographic Information File (CIF) [CIF]
data_KMg14BiO16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.720
_cell_length_b   8.937
_cell_length_c   4.470
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   348.415
_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  0.000  0.000  0.000  1.0
  Mg  Mg1  1  0.500  0.000  0.000  1.0
  Mg  Mg2  1  0.500  0.500  0.000  1.0
  Mg  Mg3  1  0.000  0.232  0.500  1.0
  Mg  Mg4  1  0.000  0.768  0.500  1.0
  Mg  Mg5  1  0.500  0.247  0.500  1.0
  Mg  Mg6  1  0.500  0.753  0.500  1.0
  Mg  Mg7  1  0.254  0.000  0.500  1.0
  Mg  Mg8  1  0.264  0.500  0.500  1.0
  Mg  Mg9  1  0.746  0.000  0.500  1.0
  Mg  Mg10  1  0.736  0.500  0.500  1.0
  Mg  Mg11  1  0.259  0.240  0.000  1.0
  Mg  Mg12  1  0.259  0.760  0.000  1.0
  Mg  Mg13  1  0.741  0.240  0.000  1.0
  Mg  Mg14  1  0.741  0.760  0.000  1.0
  Bi  Bi15  1  0.000  0.500  0.000  1.0
  O  O16  1  0.277  0.000  0.000  1.0
  O  O17  1  0.269  0.500  0.000  1.0
  O  O18  1  0.723  0.000  0.000  1.0
  O  O19  1  0.731  0.500  0.000  1.0
  O  O20  1  0.250  0.251  0.500  1.0
  O  O21  1  0.250  0.749  0.500  1.0
  O  O22  1  0.750  0.251  0.500  1.0
  O  O23  1  0.750  0.749  0.500  1.0
  O  O24  1  0.000  0.000  0.500  1.0
  O  O25  1  0.000  0.500  0.500  1.0
  O  O26  1  0.500  0.000  0.500  1.0
  O  O27  1  0.500  0.500  0.500  1.0
  O  O28  1  0.000  0.254  0.000  1.0
  O  O29  1  0.000  0.746  0.000  1.0
  O  O30  1  0.500  0.253  0.000  1.0
  O  O31  1  0.500  0.747  0.000  1.0
[/CIF]
.