The material described by LiMg6YO8 is Caswellsilverite-derived structured and crystallizes in the tetragonal P4/mmm space group. Li(1) is bonded to two equivalent O(1) and four equivalent O(4) atoms to form LiO6 octahedra that share corners with two equivalent Y(1)O6 octahedra, corners with four equivalent Li(1)O6 octahedra, edges with four equivalent Mg(2)O6 octahedra, and edges with eight equivalent Mg(3)O6 octahedra. The corner-sharing octahedra are not tilted. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(2)O6 octahedra, corners with four equivalent Mg(1)O6 octahedra, edges with four equivalent Y(1)O6 octahedra, and edges with eight equivalent Mg(3)O6 octahedra. The corner-sharing octahedra are not tilted. In the second Mg site, Mg(2) is bonded to two equivalent O(2) and four equivalent O(4) atoms to form MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Mg(2)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with eight equivalent Mg(3)O6 octahedra. The corner-sharing octahedra are not tilted. In the third Mg site, Mg(3) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form MgO6 octahedra that share corners with six equivalent Mg(3)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mg(2)O6 octahedra, edges with two equivalent Y(1)O6 octahedra, and edges with four equivalent Mg(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-13°. Y(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form YO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with four equivalent Y(1)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with eight equivalent Mg(3)O6 octahedra. The corner-sharing octahedra are not tilted. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), four equivalent Mg(3), and one Y(1) atom to form OLiYMg4 octahedra that share corners with six equivalent O(1)LiYMg4 octahedra, edges with four equivalent O(4)Li2Mg4 octahedra, edges with four equivalent O(2)Mg6 octahedra, and edges with four equivalent O(3)Y2Mg4 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the second O site, O(2) is bonded to one Mg(1), one Mg(2), and four equivalent Mg(3) atoms to form OMg6 octahedra that share corners with six equivalent O(2)Mg6 octahedra, edges with four equivalent O(4)Li2Mg4 octahedra, edges with four equivalent O(1)LiYMg4 octahedra, and edges with four equivalent O(3)Y2Mg4 octahedra. The corner-sharing octahedral tilt angles range from 0-13°. In the third O site, O(3) is bonded to two equivalent Mg(1), two equivalent Mg(3), and two equivalent Y(1) atoms to form OY2Mg4 octahedra that share corners with two equivalent O(4)Li2Mg4 octahedra, corners with four equivalent O(3)Y2Mg4 octahedra, edges with four equivalent O(1)LiYMg4 octahedra, edges with four equivalent O(2)Mg6 octahedra, and edges with four equivalent O(3)Y2Mg4 octahedra. The corner-sharing octahedra are not tilted. In the fourth O site, O(4) is bonded to two equivalent Li(1), two equivalent Mg(2), and two equivalent Mg(3) atoms to form OLi2Mg4 octahedra that share corners with two equivalent O(3)Y2Mg4 octahedra, corners with four equivalent O(4)Li2Mg4 octahedra, edges with four equivalent O(4)Li2Mg4 octahedra, edges with four equivalent O(1)LiYMg4 octahedra, and edges with four equivalent O(2)Mg6 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF card [CIF]
data_LiYMg6O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.821
_cell_length_b   4.366
_cell_length_c   4.366
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   168.161
_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
  Li  Li0  1  0.500  0.000  0.000  1.0
  Y  Y1  1  0.000  0.000  0.000  1.0
  Mg  Mg2  1  0.000  0.500  0.500  1.0
  Mg  Mg3  1  0.500  0.500  0.500  1.0
  Mg  Mg4  1  0.274  0.000  0.500  1.0
  Mg  Mg5  1  0.726  0.000  0.500  1.0
  Mg  Mg6  1  0.274  0.500  0.000  1.0
  Mg  Mg7  1  0.726  0.500  0.000  1.0
  O  O8  1  0.254  0.000  0.000  1.0
  O  O9  1  0.746  0.000  0.000  1.0
  O  O10  1  0.246  0.500  0.500  1.0
  O  O11  1  0.754  0.500  0.500  1.0
  O  O12  1  0.000  0.000  0.500  1.0
  O  O13  1  0.500  0.000  0.500  1.0
  O  O14  1  0.000  0.500  0.000  1.0
  O  O15  1  0.500  0.500  0.000  1.0
[/CIF]
.
The material described by LiMg6YO8 is Caswellsilverite-derived structured and crystallizes in the tetragonal P4/mmm space group. Li(1) is bonded to two equivalent O(1) and four equivalent O(4) atoms to form LiO6 octahedra that share corners with two equivalent Y(1)O6 octahedra, corners with four equivalent Li(1)O6 octahedra, edges with four equivalent Mg(2)O6 octahedra, and edges with eight equivalent Mg(3)O6 octahedra. The corner-sharing octahedra are not tilted. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(2)O6 octahedra, corners with four equivalent Mg(1)O6 octahedra, edges with four equivalent Y(1)O6 octahedra, and edges with eight equivalent Mg(3)O6 octahedra. The corner-sharing octahedra are not tilted. In the second Mg site, Mg(2) is bonded to two equivalent O(2) and four equivalent O(4) atoms to form MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Mg(2)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with eight equivalent Mg(3)O6 octahedra. The corner-sharing octahedra are not tilted. In the third Mg site, Mg(3) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form MgO6 octahedra that share corners with six equivalent Mg(3)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mg(2)O6 octahedra, edges with two equivalent Y(1)O6 octahedra, and edges with four equivalent Mg(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-13°. Y(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form YO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with four equivalent Y(1)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with eight equivalent Mg(3)O6 octahedra. The corner-sharing octahedra are not tilted. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), four equivalent Mg(3), and one Y(1) atom to form OLiYMg4 octahedra that share corners with six equivalent O(1)LiYMg4 octahedra, edges with four equivalent O(4)Li2Mg4 octahedra, edges with four equivalent O(2)Mg6 octahedra, and edges with four equivalent O(3)Y2Mg4 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the second O site, O(2) is bonded to one Mg(1), one Mg(2), and four equivalent Mg(3) atoms to form OMg6 octahedra that share corners with six equivalent O(2)Mg6 octahedra, edges with four equivalent O(4)Li2Mg4 octahedra, edges with four equivalent O(1)LiYMg4 octahedra, and edges with four equivalent O(3)Y2Mg4 octahedra. The corner-sharing octahedral tilt angles range from 0-13°. In the third O site, O(3) is bonded to two equivalent Mg(1), two equivalent Mg(3), and two equivalent Y(1) atoms to form OY2Mg4 octahedra that share corners with two equivalent O(4)Li2Mg4 octahedra, corners with four equivalent O(3)Y2Mg4 octahedra, edges with four equivalent O(1)LiYMg4 octahedra, edges with four equivalent O(2)Mg6 octahedra, and edges with four equivalent O(3)Y2Mg4 octahedra. The corner-sharing octahedra are not tilted. In the fourth O site, O(4) is bonded to two equivalent Li(1), two equivalent Mg(2), and two equivalent Mg(3) atoms to form OLi2Mg4 octahedra that share corners with two equivalent O(3)Y2Mg4 octahedra, corners with four equivalent O(4)Li2Mg4 octahedra, edges with four equivalent O(4)Li2Mg4 octahedra, edges with four equivalent O(1)LiYMg4 octahedra, and edges with four equivalent O(2)Mg6 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF card [CIF]
data_LiYMg6O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.821
_cell_length_b   4.366
_cell_length_c   4.366
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   168.161
_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
  Li  Li0  1  0.500  0.000  0.000  1.0
  Y  Y1  1  0.000  0.000  0.000  1.0
  Mg  Mg2  1  0.000  0.500  0.500  1.0
  Mg  Mg3  1  0.500  0.500  0.500  1.0
  Mg  Mg4  1  0.274  0.000  0.500  1.0
  Mg  Mg5  1  0.726  0.000  0.500  1.0
  Mg  Mg6  1  0.274  0.500  0.000  1.0
  Mg  Mg7  1  0.726  0.500  0.000  1.0
  O  O8  1  0.254  0.000  0.000  1.0
  O  O9  1  0.746  0.000  0.000  1.0
  O  O10  1  0.246  0.500  0.500  1.0
  O  O11  1  0.754  0.500  0.500  1.0
  O  O12  1  0.000  0.000  0.500  1.0
  O  O13  1  0.500  0.000  0.500  1.0
  O  O14  1  0.000  0.500  0.000  1.0
  O  O15  1  0.500  0.500  0.000  1.0
[/CIF]
.