The crystal structure described by Mg3Al14O24 is beta indium sulfide-derived structured and crystallizes in the monoclinic Cm space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(11), and two equivalent O(2) atoms to form MgO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one Al(5)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, corners with two equivalent Al(3)O6 octahedra, corners with two equivalent Al(4)O6 octahedra, corners with two equivalent Al(8)O6 octahedra, and corners with two equivalent Al(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-64°. In the second Mg site, Mg(2) is bonded to one O(17), one O(5), and two equivalent O(8) atoms to form MgO4 tetrahedra that share  a cornercorner with one Al(3)O6 octahedra, corners with two equivalent Al(4)O6 octahedra, corners with two equivalent Al(5)O6 octahedra, corners with two equivalent Al(6)O6 octahedra, corners with two equivalent Al(8)O6 octahedra, and corners with two equivalent Al(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-63°. In the third Mg site, Mg(3) is bonded to one O(15), one O(4), and two equivalent O(7) atoms to form MgO4 tetrahedra that share  a cornercorner with one Al(2)O6 octahedra,  a cornercorner with one Al(3)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, corners with two equivalent Al(4)O6 octahedra, corners with two equivalent Al(5)O6 octahedra, corners with two equivalent Al(8)O6 octahedra, and corners with two equivalent Al(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-65°. There are eleven inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(9), two equivalent O(14), and two equivalent O(7) atoms to form AlO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Al(11)O4 tetrahedra, corners with two equivalent Mg(3)O4 tetrahedra, corners with two equivalent Al(7)O4 tetrahedra,  an edgeedge with one Al(5)O6 octahedra, edges with two equivalent Al(4)O6 octahedra, and edges with two equivalent Al(9)O6 octahedra. In the second Al site, Al(2) is bonded to one O(4), one O(6), two equivalent O(2), and two equivalent O(3) atoms to form AlO6 octahedra that share  a cornercorner with one Mg(3)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra, corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Al(11)O4 tetrahedra,  an edgeedge with one Al(3)O6 octahedra,  an edgeedge with one Al(6)O6 octahedra, edges with two equivalent Al(4)O6 octahedra, and edges with two equivalent Al(9)O6 octahedra. In the third Al site, Al(3) is bonded to one O(15), one O(5), two equivalent O(13), and two equivalent O(2) atoms to form AlO6 octahedra that share  a cornercorner with one Mg(2)O4 tetrahedra,  a cornercorner with one Mg(3)O4 tetrahedra, corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Al(10)O4 tetrahedra,  an edgeedge with one Al(2)O6 octahedra, edges with two equivalent Al(4)O6 octahedra, and edges with two equivalent Al(8)O6 octahedra. In the fourth Al site, Al(4) is bonded to one O(10), one O(2), one O(5), one O(6), one O(7), and one O(9) atom to form AlO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Mg(2)O4 tetrahedra,  a cornercorner with one Mg(3)O4 tetrahedra,  a cornercorner with one Al(10)O4 tetrahedra,  a cornercorner with one Al(11)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra,  an edgeedge with one Al(3)O6 octahedra,  an edgeedge with one Al(5)O6 octahedra, and edges with two equivalent Al(4)O6 octahedra. In the fifth Al site, Al(5) is bonded to one O(10), one O(11), two equivalent O(7), and two equivalent O(8) atoms to form AlO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Al(10)O4 tetrahedra, corners with two equivalent Mg(2)O4 tetrahedra, corners with two equivalent Mg(3)O4 tetrahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(6)O6 octahedra, edges with two equivalent Al(4)O6 octahedra, and edges with two equivalent Al(8)O6 octahedra. In the sixth Al site, Al(6) is bonded to one O(12), one O(18), two equivalent O(3), and two equivalent O(8) atoms to form AlO6 octahedra that share  a cornercorner with one Al(10)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra, corners with two equivalent Mg(2)O4 tetrahedra, corners with two equivalent Al(11)O4 tetrahedra,  an edgeedge with one Al(2)O6 octahedra,  an edgeedge with one Al(5)O6 octahedra, edges with two equivalent Al(8)O6 octahedra, and edges with two equivalent Al(9)O6 octahedra. In the seventh Al site, Al(7) is bonded to one O(12), one O(6), and two equivalent O(14) atoms to form corner-sharing AlO4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-58°. In the eighth Al site, Al(8) is bonded to one O(11), one O(12), one O(13), one O(15), one O(16), and one O(8) atom to form AlO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Mg(2)O4 tetrahedra,  a cornercorner with one Mg(3)O4 tetrahedra,  a cornercorner with one Al(10)O4 tetrahedra,  a cornercorner with one Al(11)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra,  an edgeedge with one Al(3)O6 octahedra,  an edgeedge with one Al(5)O6 octahedra,  an edgeedge with one Al(6)O6 octahedra, and edges with two equivalent Al(8)O6 octahedra. In the ninth Al site, Al(9) is bonded to one O(1), one O(14), one O(17), one O(18), one O(3), and one O(4) atom to form AlO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Mg(2)O4 tetrahedra,  a cornercorner with one Mg(3)O4 tetrahedra,  a cornercorner with one Al(10)O4 tetrahedra,  a cornercorner with one Al(11)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra,  an edgeedge with one Al(6)O6 octahedra, and edges with two equivalent Al(9)O6 octahedra. In the tenth Al site, Al(10) is bonded to one O(10), one O(18), and two equivalent O(13) atoms to form corner-sharing AlO4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-61°. In the eleventh Al site, Al(11) is bonded to one O(16), one O(9), and two equivalent O(3) atoms to form corner-sharing AlO4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-62°. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Al(1), and two equivalent Al(9) atoms. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Al(2), one Al(3), and one Al(4) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Al(11), one Al(2), one Al(6), and one Al(9) atom. In the fourth O site, O(4) is bonded to one Mg(3), one Al(2), and two equivalent Al(9) atoms to form corner-sharing OMgAl3 tetrahedra. In the fifth O site, O(5) is bonded to one Mg(2), one Al(3), and two equivalent Al(4) atoms to form distorted corner-sharing OMgAl3 tetrahedra. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Al(2), one Al(7), and two equivalent Al(4) atoms. In the seventh O site, O(7) is bonded to one Mg(3), one Al(1), one Al(4), and one Al(5) atom to form a mixture of distorted corner and edge-sharing OMgAl3 tetrahedra. In the eighth O site, O(8) is bonded to one Mg(2), one Al(5), one Al(6), and one Al(8) atom to form a mixture of distorted corner and edge-sharing OMgAl3 tetrahedra. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Al(1), one Al(11), and two equivalent Al(4) atoms. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Al(10), one Al(5), and two equivalent Al(4) atoms. In the eleventh O site, O(11) is bonded to one Mg(1), one Al(5), and two equivalent Al(8) atoms to form a mixture of distorted corner and edge-sharing OMgAl3 tetrahedra. In the twelfth O site, O(12) is bonded in a distorted rectangular see-saw-like geometry to one Al(6), one Al(7), and two equivalent Al(8) atoms. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Al(10), one Al(3), and one Al(8) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(7), and one Al(9) atom. In the fifteenth O site, O(15) is bonded to one Mg(3), one Al(3), and two equivalent Al(8) atoms to form distorted corner-sharing OMgAl3 trigonal pyramids. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Al(11) and two equivalent Al(8) atoms. In the seventeenth O site, O(17) is bonded in a trigonal planar geometry to one Mg(2) and two equivalent Al(9) atoms. In the eighteenth O site, O(18) is bonded in a distorted rectangular see-saw-like geometry to one Al(10), one Al(6), and two equivalent Al(9) atoms. is represented by the CIF file [CIF]
data_Mg3Al14O24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.809
_cell_length_b   9.809
_cell_length_c   8.106
_cell_angle_alpha   66.509
_cell_angle_beta   66.509
_cell_angle_gamma   34.018
_symmetry_Int_Tables_number   1
_cell_volume   396.584
_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
  Mg  Mg0  1  0.420  0.420  0.457  1.0
  Mg  Mg1  1  0.086  0.086  0.794  1.0
  Mg  Mg2  1  0.913  0.913  0.211  1.0
  Al  Al3  1  0.330  0.330  0.165  1.0
  Al  Al4  1  0.833  0.833  0.666  1.0
  Al  Al5  1  0.005  0.005  0.501  1.0
  Al  Al6  1  0.669  0.165  0.831  1.0
  Al  Al7  1  0.501  0.501  0.004  1.0
  Al  Al8  1  0.665  0.665  0.838  1.0
  Al  Al9  1  0.753  0.753  0.126  1.0
  Al  Al10  1  0.332  0.841  0.174  1.0
  Al  Al11  1  0.165  0.669  0.831  1.0
  Al  Al12  1  0.841  0.332  0.174  1.0
  Al  Al13  1  0.005  0.489  0.488  1.0
  Al  Al14  1  0.581  0.581  0.539  1.0
  Al  Al15  1  0.489  0.005  0.488  1.0
  Al  Al16  1  0.246  0.246  0.872  1.0
  O  O17  1  0.327  0.327  0.403  1.0
  O  O18  1  0.135  0.692  0.603  1.0
  O  O19  1  0.978  0.520  0.750  1.0
  O  O20  1  0.820  0.820  0.451  1.0
  O  O21  1  0.991  0.991  0.749  1.0
  O  O22  1  0.837  0.837  0.907  1.0
  O  O23  1  0.520  0.978  0.750  1.0
  O  O24  1  0.692  0.135  0.603  1.0
  O  O25  1  0.638  0.198  0.060  1.0
  O  O26  1  0.803  0.365  0.933  1.0
  O  O27  1  0.336  0.336  0.913  1.0
  O  O28  1  0.495  0.495  0.759  1.0
  O  O29  1  0.511  0.511  0.224  1.0
  O  O30  1  0.665  0.665  0.085  1.0
  O  O31  1  0.198  0.638  0.060  1.0
  O  O32  1  0.365  0.803  0.933  1.0
  O  O33  1  0.327  0.823  0.417  1.0
  O  O34  1  0.513  0.007  0.246  1.0
  O  O35  1  0.010  0.010  0.258  1.0
  O  O36  1  0.160  0.160  0.075  1.0
  O  O37  1  0.180  0.180  0.578  1.0
  O  O38  1  0.823  0.327  0.417  1.0
  O  O39  1  0.007  0.513  0.246  1.0
  O  O40  1  0.669  0.669  0.587  1.0
[/CIF]
.
The crystal structure described by Mg3Al14O24 is beta indium sulfide-derived structured and crystallizes in the monoclinic Cm space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(11), and two equivalent O(2) atoms to form MgO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one Al(5)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, corners with two equivalent Al(3)O6 octahedra, corners with two equivalent Al(4)O6 octahedra, corners with two equivalent Al(8)O6 octahedra, and corners with two equivalent Al(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-64°. In the second Mg site, Mg(2) is bonded to one O(17), one O(5), and two equivalent O(8) atoms to form MgO4 tetrahedra that share  a cornercorner with one Al(3)O6 octahedra, corners with two equivalent Al(4)O6 octahedra, corners with two equivalent Al(5)O6 octahedra, corners with two equivalent Al(6)O6 octahedra, corners with two equivalent Al(8)O6 octahedra, and corners with two equivalent Al(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-63°. In the third Mg site, Mg(3) is bonded to one O(15), one O(4), and two equivalent O(7) atoms to form MgO4 tetrahedra that share  a cornercorner with one Al(2)O6 octahedra,  a cornercorner with one Al(3)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, corners with two equivalent Al(4)O6 octahedra, corners with two equivalent Al(5)O6 octahedra, corners with two equivalent Al(8)O6 octahedra, and corners with two equivalent Al(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-65°. There are eleven inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(9), two equivalent O(14), and two equivalent O(7) atoms to form AlO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Al(11)O4 tetrahedra, corners with two equivalent Mg(3)O4 tetrahedra, corners with two equivalent Al(7)O4 tetrahedra,  an edgeedge with one Al(5)O6 octahedra, edges with two equivalent Al(4)O6 octahedra, and edges with two equivalent Al(9)O6 octahedra. In the second Al site, Al(2) is bonded to one O(4), one O(6), two equivalent O(2), and two equivalent O(3) atoms to form AlO6 octahedra that share  a cornercorner with one Mg(3)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra, corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Al(11)O4 tetrahedra,  an edgeedge with one Al(3)O6 octahedra,  an edgeedge with one Al(6)O6 octahedra, edges with two equivalent Al(4)O6 octahedra, and edges with two equivalent Al(9)O6 octahedra. In the third Al site, Al(3) is bonded to one O(15), one O(5), two equivalent O(13), and two equivalent O(2) atoms to form AlO6 octahedra that share  a cornercorner with one Mg(2)O4 tetrahedra,  a cornercorner with one Mg(3)O4 tetrahedra, corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Al(10)O4 tetrahedra,  an edgeedge with one Al(2)O6 octahedra, edges with two equivalent Al(4)O6 octahedra, and edges with two equivalent Al(8)O6 octahedra. In the fourth Al site, Al(4) is bonded to one O(10), one O(2), one O(5), one O(6), one O(7), and one O(9) atom to form AlO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Mg(2)O4 tetrahedra,  a cornercorner with one Mg(3)O4 tetrahedra,  a cornercorner with one Al(10)O4 tetrahedra,  a cornercorner with one Al(11)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra,  an edgeedge with one Al(3)O6 octahedra,  an edgeedge with one Al(5)O6 octahedra, and edges with two equivalent Al(4)O6 octahedra. In the fifth Al site, Al(5) is bonded to one O(10), one O(11), two equivalent O(7), and two equivalent O(8) atoms to form AlO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Al(10)O4 tetrahedra, corners with two equivalent Mg(2)O4 tetrahedra, corners with two equivalent Mg(3)O4 tetrahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(6)O6 octahedra, edges with two equivalent Al(4)O6 octahedra, and edges with two equivalent Al(8)O6 octahedra. In the sixth Al site, Al(6) is bonded to one O(12), one O(18), two equivalent O(3), and two equivalent O(8) atoms to form AlO6 octahedra that share  a cornercorner with one Al(10)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra, corners with two equivalent Mg(2)O4 tetrahedra, corners with two equivalent Al(11)O4 tetrahedra,  an edgeedge with one Al(2)O6 octahedra,  an edgeedge with one Al(5)O6 octahedra, edges with two equivalent Al(8)O6 octahedra, and edges with two equivalent Al(9)O6 octahedra. In the seventh Al site, Al(7) is bonded to one O(12), one O(6), and two equivalent O(14) atoms to form corner-sharing AlO4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-58°. In the eighth Al site, Al(8) is bonded to one O(11), one O(12), one O(13), one O(15), one O(16), and one O(8) atom to form AlO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Mg(2)O4 tetrahedra,  a cornercorner with one Mg(3)O4 tetrahedra,  a cornercorner with one Al(10)O4 tetrahedra,  a cornercorner with one Al(11)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra,  an edgeedge with one Al(3)O6 octahedra,  an edgeedge with one Al(5)O6 octahedra,  an edgeedge with one Al(6)O6 octahedra, and edges with two equivalent Al(8)O6 octahedra. In the ninth Al site, Al(9) is bonded to one O(1), one O(14), one O(17), one O(18), one O(3), and one O(4) atom to form AlO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Mg(2)O4 tetrahedra,  a cornercorner with one Mg(3)O4 tetrahedra,  a cornercorner with one Al(10)O4 tetrahedra,  a cornercorner with one Al(11)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra,  an edgeedge with one Al(6)O6 octahedra, and edges with two equivalent Al(9)O6 octahedra. In the tenth Al site, Al(10) is bonded to one O(10), one O(18), and two equivalent O(13) atoms to form corner-sharing AlO4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-61°. In the eleventh Al site, Al(11) is bonded to one O(16), one O(9), and two equivalent O(3) atoms to form corner-sharing AlO4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-62°. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Al(1), and two equivalent Al(9) atoms. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Al(2), one Al(3), and one Al(4) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Al(11), one Al(2), one Al(6), and one Al(9) atom. In the fourth O site, O(4) is bonded to one Mg(3), one Al(2), and two equivalent Al(9) atoms to form corner-sharing OMgAl3 tetrahedra. In the fifth O site, O(5) is bonded to one Mg(2), one Al(3), and two equivalent Al(4) atoms to form distorted corner-sharing OMgAl3 tetrahedra. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Al(2), one Al(7), and two equivalent Al(4) atoms. In the seventh O site, O(7) is bonded to one Mg(3), one Al(1), one Al(4), and one Al(5) atom to form a mixture of distorted corner and edge-sharing OMgAl3 tetrahedra. In the eighth O site, O(8) is bonded to one Mg(2), one Al(5), one Al(6), and one Al(8) atom to form a mixture of distorted corner and edge-sharing OMgAl3 tetrahedra. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Al(1), one Al(11), and two equivalent Al(4) atoms. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Al(10), one Al(5), and two equivalent Al(4) atoms. In the eleventh O site, O(11) is bonded to one Mg(1), one Al(5), and two equivalent Al(8) atoms to form a mixture of distorted corner and edge-sharing OMgAl3 tetrahedra. In the twelfth O site, O(12) is bonded in a distorted rectangular see-saw-like geometry to one Al(6), one Al(7), and two equivalent Al(8) atoms. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Al(10), one Al(3), and one Al(8) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(7), and one Al(9) atom. In the fifteenth O site, O(15) is bonded to one Mg(3), one Al(3), and two equivalent Al(8) atoms to form distorted corner-sharing OMgAl3 trigonal pyramids. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Al(11) and two equivalent Al(8) atoms. In the seventeenth O site, O(17) is bonded in a trigonal planar geometry to one Mg(2) and two equivalent Al(9) atoms. In the eighteenth O site, O(18) is bonded in a distorted rectangular see-saw-like geometry to one Al(10), one Al(6), and two equivalent Al(9) atoms. is represented by the CIF file [CIF]
data_Mg3Al14O24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.809
_cell_length_b   9.809
_cell_length_c   8.106
_cell_angle_alpha   66.509
_cell_angle_beta   66.509
_cell_angle_gamma   34.018
_symmetry_Int_Tables_number   1
_cell_volume   396.584
_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
  Mg  Mg0  1  0.420  0.420  0.457  1.0
  Mg  Mg1  1  0.086  0.086  0.794  1.0
  Mg  Mg2  1  0.913  0.913  0.211  1.0
  Al  Al3  1  0.330  0.330  0.165  1.0
  Al  Al4  1  0.833  0.833  0.666  1.0
  Al  Al5  1  0.005  0.005  0.501  1.0
  Al  Al6  1  0.669  0.165  0.831  1.0
  Al  Al7  1  0.501  0.501  0.004  1.0
  Al  Al8  1  0.665  0.665  0.838  1.0
  Al  Al9  1  0.753  0.753  0.126  1.0
  Al  Al10  1  0.332  0.841  0.174  1.0
  Al  Al11  1  0.165  0.669  0.831  1.0
  Al  Al12  1  0.841  0.332  0.174  1.0
  Al  Al13  1  0.005  0.489  0.488  1.0
  Al  Al14  1  0.581  0.581  0.539  1.0
  Al  Al15  1  0.489  0.005  0.488  1.0
  Al  Al16  1  0.246  0.246  0.872  1.0
  O  O17  1  0.327  0.327  0.403  1.0
  O  O18  1  0.135  0.692  0.603  1.0
  O  O19  1  0.978  0.520  0.750  1.0
  O  O20  1  0.820  0.820  0.451  1.0
  O  O21  1  0.991  0.991  0.749  1.0
  O  O22  1  0.837  0.837  0.907  1.0
  O  O23  1  0.520  0.978  0.750  1.0
  O  O24  1  0.692  0.135  0.603  1.0
  O  O25  1  0.638  0.198  0.060  1.0
  O  O26  1  0.803  0.365  0.933  1.0
  O  O27  1  0.336  0.336  0.913  1.0
  O  O28  1  0.495  0.495  0.759  1.0
  O  O29  1  0.511  0.511  0.224  1.0
  O  O30  1  0.665  0.665  0.085  1.0
  O  O31  1  0.198  0.638  0.060  1.0
  O  O32  1  0.365  0.803  0.933  1.0
  O  O33  1  0.327  0.823  0.417  1.0
  O  O34  1  0.513  0.007  0.246  1.0
  O  O35  1  0.010  0.010  0.258  1.0
  O  O36  1  0.160  0.160  0.075  1.0
  O  O37  1  0.180  0.180  0.578  1.0
  O  O38  1  0.823  0.327  0.417  1.0
  O  O39  1  0.007  0.513  0.246  1.0
  O  O40  1  0.669  0.669  0.587  1.0
[/CIF]
.