The structure described by MgGa2O4 is Spinel-like structured and crystallizes in the monoclinic Cm space group. There are six inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(13), one O(3), and two equivalent O(1) atoms to form MgO4 tetrahedra that share  a cornercorner with one Mg(5)O6 octahedra, corners with two equivalent Mg(2)O6 octahedra, corners with two equivalent Ga(6)O6 octahedra, corners with three equivalent Ga(3)O6 octahedra, and corners with four equivalent Ga(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-60°. In the second Mg site, Mg(2) is bonded to one O(2), one O(8), two equivalent O(1), and two equivalent O(6) atoms to form MgO6 octahedra that share  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Ga(9)O4 tetrahedra, corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Ga(7)O4 tetrahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Ga(3)O6 octahedra, and edges with four equivalent Ga(2)O6 octahedra. In the third Mg site, Mg(3) is bonded to one O(14), one O(7), two equivalent O(12), and two equivalent O(4) atoms to form MgO6 octahedra that share  a cornercorner with one Ga(5)O4 tetrahedra,  a cornercorner with one Ga(7)O4 tetrahedra, corners with two equivalent Ga(1)O4 tetrahedra, corners with two equivalent Ga(8)O4 tetrahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra, and edges with four equivalent Ga(4)O6 octahedra. In the fourth Mg site, Mg(4) is bonded to one O(5), one O(9), two equivalent O(4), and two equivalent O(6) atoms to form MgO6 octahedra that share corners with three equivalent Ga(1)O4 tetrahedra, corners with three equivalent Ga(7)O4 tetrahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra, edges with two equivalent Ga(2)O6 octahedra, and edges with two equivalent Ga(4)O6 octahedra. In the fifth Mg site, Mg(5) is bonded to one O(13), one O(18), two equivalent O(10), and two equivalent O(17) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Ga(8)O4 tetrahedra, corners with two equivalent Ga(5)O4 tetrahedra, corners with two equivalent Ga(9)O4 tetrahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Ga(3)O6 octahedra, and edges with four equivalent Ga(6)O6 octahedra. In the sixth Mg site, Mg(6) is bonded to one O(11), one O(15), two equivalent O(10), and two equivalent O(12) atoms to form MgO6 octahedra that share corners with three equivalent Ga(5)O4 tetrahedra, corners with three equivalent Ga(8)O4 tetrahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra, edges with two equivalent Ga(4)O6 octahedra, and edges with two equivalent Ga(6)O6 octahedra. There are nine inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(2), one O(9), and two equivalent O(4) atoms to form GaO4 tetrahedra that share  a cornercorner with one Mg(2)O6 octahedra, corners with two equivalent Mg(3)O6 octahedra, corners with two equivalent Ga(2)O6 octahedra, corners with three equivalent Mg(4)O6 octahedra, and corners with four equivalent Ga(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-57°. In the second Ga site, Ga(2) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(8) atom to form GaO6 octahedra that share  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Ga(9)O4 tetrahedra, corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Ga(7)O4 tetrahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Ga(3)O6 octahedra, edges with two equivalent Mg(2)O6 octahedra, and edges with two equivalent Ga(2)O6 octahedra. In the third Ga site, Ga(3) is bonded to one O(16), one O(3), two equivalent O(1), and two equivalent O(17) atoms to form GaO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Ga(9)O4 tetrahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra, edges with two equivalent Ga(2)O6 octahedra, and edges with two equivalent Ga(6)O6 octahedra. In the fourth Ga site, Ga(4) is bonded to one O(11), one O(12), one O(14), one O(4), one O(7), and one O(9) atom to form GaO6 octahedra that share  a cornercorner with one Ga(5)O4 tetrahedra,  a cornercorner with one Ga(7)O4 tetrahedra, corners with two equivalent Ga(1)O4 tetrahedra, corners with two equivalent Ga(8)O4 tetrahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, and edges with two equivalent Ga(4)O6 octahedra. In the fifth Ga site, Ga(5) is bonded to one O(15), one O(7), and two equivalent O(10) atoms to form GaO4 tetrahedra that share  a cornercorner with one Mg(3)O6 octahedra, corners with two equivalent Mg(5)O6 octahedra, corners with two equivalent Ga(4)O6 octahedra, corners with three equivalent Mg(6)O6 octahedra, and corners with four equivalent Ga(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-57°. In the sixth Ga site, Ga(6) is bonded to one O(10), one O(13), one O(15), one O(16), one O(17), and one O(18) atom to form GaO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Ga(8)O4 tetrahedra, corners with two equivalent Ga(5)O4 tetrahedra, corners with two equivalent Ga(9)O4 tetrahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Ga(3)O6 octahedra, edges with two equivalent Mg(5)O6 octahedra, and edges with two equivalent Ga(6)O6 octahedra. In the seventh Ga site, Ga(7) is bonded to one O(14), one O(5), and two equivalent O(6) atoms to form GaO4 tetrahedra that share  a cornercorner with one Mg(3)O6 octahedra, corners with two equivalent Mg(2)O6 octahedra, corners with two equivalent Ga(4)O6 octahedra, corners with three equivalent Mg(4)O6 octahedra, and corners with four equivalent Ga(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-57°. In the eighth Ga site, Ga(8) is bonded to one O(11), one O(18), and two equivalent O(12) atoms to form GaO4 tetrahedra that share  a cornercorner with one Mg(5)O6 octahedra, corners with two equivalent Mg(3)O6 octahedra, corners with two equivalent Ga(6)O6 octahedra, corners with three equivalent Mg(6)O6 octahedra, and corners with four equivalent Ga(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-58°. In the ninth Ga site, Ga(9) is bonded to one O(16), one O(8), and two equivalent O(17) atoms to form GaO4 tetrahedra that share  a cornercorner with one Mg(2)O6 octahedra, corners with two equivalent Mg(5)O6 octahedra, corners with two equivalent Ga(2)O6 octahedra, corners with three equivalent Ga(3)O6 octahedra, and corners with four equivalent Ga(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-59°. 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 Mg(2), one Ga(2), and one Ga(3) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(2), one Ga(1), and two equivalent Ga(2) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ga(3), and two equivalent Ga(2) atoms. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(3), one Mg(4), one Ga(1), and one Ga(4) atom. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Mg(4), one Ga(7), and two equivalent Ga(2) atoms. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Mg(2), one Mg(4), one Ga(2), and one Ga(7) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Mg(3), one Ga(5), and two equivalent Ga(4) atoms. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Mg(2), one Ga(9), and two equivalent Ga(2) atoms. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Mg(4), one Ga(1), and two equivalent Ga(4) atoms. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Mg(5), one Mg(6), one Ga(5), and one Ga(6) atom. In the eleventh O site, O(11) is bonded in a rectangular see-saw-like geometry to one Mg(6), one Ga(8), and two equivalent Ga(4) atoms. In the twelfth O site, O(12) is bonded in a distorted rectangular see-saw-like geometry to one Mg(3), one Mg(6), one Ga(4), and one Ga(8) atom. In the thirteenth O site, O(13) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(5), and two equivalent Ga(6) atoms. In the fourteenth O site, O(14) is bonded in a rectangular see-saw-like geometry to one Mg(3), one Ga(7), and two equivalent Ga(4) atoms. In the fifteenth O site, O(15) is bonded in a rectangular see-saw-like geometry to one Mg(6), one Ga(5), and two equivalent Ga(6) atoms. In the sixteenth O site, O(16) is bonded to one Ga(3), one Ga(9), and two equivalent Ga(6) atoms to form a mixture of distorted corner and edge-sharing OGa4 trigonal pyramids. In the seventeenth O site, O(17) is bonded to one Mg(5), one Ga(3), one Ga(6), and one Ga(9) atom to form distorted OMgGa3 trigonal pyramids that share  a cornercorner with one O(16)Ga4 trigonal pyramid,  a cornercorner with one O(17)MgGa3 trigonal pyramid,  an edgeedge with one O(16)Ga4 trigonal pyramid,  an edgeedge with one O(17)MgGa3 trigonal pyramid, and  an edgeedge with one O(18)MgGa3 trigonal pyramid. In the eighteenth O site, O(18) is bonded to one Mg(5), one Ga(8), and two equivalent Ga(6) atoms to form distorted OMgGa3 trigonal pyramids that share  an edgeedge with one O(16)Ga4 trigonal pyramid and edges with two equivalent O(17)MgGa3 trigonal pyramids. is represented by the CIF file [CIF]
data_Mg(GaO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.931
_cell_length_b   5.931
_cell_length_c   14.495
_cell_angle_alpha   89.922
_cell_angle_beta   89.922
_cell_angle_gamma   60.559
_symmetry_Int_Tables_number   1
_cell_volume   444.119
_cell_formula_units_Z   6
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  0.338  0.338  0.041  1.0
  Mg  Mg1  1  0.834  0.834  0.168  1.0
  Mg  Mg2  1  0.500  0.500  0.500  1.0
  Mg  Mg3  1  0.666  0.666  0.333  1.0
  Mg  Mg4  1  0.167  0.167  0.832  1.0
  Mg  Mg5  1  0.333  0.333  0.666  1.0
  Ga  Ga6  1  0.006  0.006  0.380  1.0
  Ga  Ga7  1  0.835  0.329  0.168  1.0
  Ga  Ga8  1  1.000  1.000  0.004  1.0
  Ga  Ga9  1  0.329  0.835  0.168  1.0
  Ga  Ga10  1  0.500  0.999  0.500  1.0
  Ga  Ga11  1  0.673  0.673  0.709  1.0
  Ga  Ga12  1  0.999  0.500  0.500  1.0
  Ga  Ga13  1  0.169  0.662  0.832  1.0
  Ga  Ga14  1  0.327  0.327  0.289  1.0
  Ga  Ga15  1  0.662  0.169  0.832  1.0
  Ga  Ga16  1  0.993  0.993  0.622  1.0
  Ga  Ga17  1  0.660  0.660  0.959  1.0
  O  O18  1  0.699  0.159  0.086  1.0
  O  O19  1  0.159  0.699  0.086  1.0
  O  O20  1  0.003  0.003  0.248  1.0
  O  O21  1  0.154  0.154  0.088  1.0
  O  O22  1  0.351  0.832  0.421  1.0
  O  O23  1  0.505  0.505  0.245  1.0
  O  O24  1  0.501  0.983  0.246  1.0
  O  O25  1  0.671  0.671  0.577  1.0
  O  O26  1  0.832  0.351  0.421  1.0
  O  O27  1  0.663  0.663  0.089  1.0
  O  O28  1  0.828  0.828  0.421  1.0
  O  O29  1  0.983  0.501  0.246  1.0
  O  O30  1  0.014  0.499  0.753  1.0
  O  O31  1  0.172  0.172  0.579  1.0
  O  O32  1  0.168  0.649  0.579  1.0
  O  O33  1  0.499  0.014  0.753  1.0
  O  O34  1  0.340  0.340  0.903  1.0
  O  O35  1  0.329  0.329  0.422  1.0
  O  O36  1  0.497  0.497  0.753  1.0
  O  O37  1  0.649  0.168  0.579  1.0
  O  O38  1  0.841  0.841  0.915  1.0
  O  O39  1  0.840  0.310  0.916  1.0
  O  O40  1  0.995  0.995  0.756  1.0
  O  O41  1  0.310  0.840  0.916  1.0
[/CIF]
.
The structure described by MgGa2O4 is Spinel-like structured and crystallizes in the monoclinic Cm space group. There are six inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(13), one O(3), and two equivalent O(1) atoms to form MgO4 tetrahedra that share  a cornercorner with one Mg(5)O6 octahedra, corners with two equivalent Mg(2)O6 octahedra, corners with two equivalent Ga(6)O6 octahedra, corners with three equivalent Ga(3)O6 octahedra, and corners with four equivalent Ga(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-60°. In the second Mg site, Mg(2) is bonded to one O(2), one O(8), two equivalent O(1), and two equivalent O(6) atoms to form MgO6 octahedra that share  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Ga(9)O4 tetrahedra, corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Ga(7)O4 tetrahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Ga(3)O6 octahedra, and edges with four equivalent Ga(2)O6 octahedra. In the third Mg site, Mg(3) is bonded to one O(14), one O(7), two equivalent O(12), and two equivalent O(4) atoms to form MgO6 octahedra that share  a cornercorner with one Ga(5)O4 tetrahedra,  a cornercorner with one Ga(7)O4 tetrahedra, corners with two equivalent Ga(1)O4 tetrahedra, corners with two equivalent Ga(8)O4 tetrahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra, and edges with four equivalent Ga(4)O6 octahedra. In the fourth Mg site, Mg(4) is bonded to one O(5), one O(9), two equivalent O(4), and two equivalent O(6) atoms to form MgO6 octahedra that share corners with three equivalent Ga(1)O4 tetrahedra, corners with three equivalent Ga(7)O4 tetrahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra, edges with two equivalent Ga(2)O6 octahedra, and edges with two equivalent Ga(4)O6 octahedra. In the fifth Mg site, Mg(5) is bonded to one O(13), one O(18), two equivalent O(10), and two equivalent O(17) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Ga(8)O4 tetrahedra, corners with two equivalent Ga(5)O4 tetrahedra, corners with two equivalent Ga(9)O4 tetrahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Ga(3)O6 octahedra, and edges with four equivalent Ga(6)O6 octahedra. In the sixth Mg site, Mg(6) is bonded to one O(11), one O(15), two equivalent O(10), and two equivalent O(12) atoms to form MgO6 octahedra that share corners with three equivalent Ga(5)O4 tetrahedra, corners with three equivalent Ga(8)O4 tetrahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra, edges with two equivalent Ga(4)O6 octahedra, and edges with two equivalent Ga(6)O6 octahedra. There are nine inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(2), one O(9), and two equivalent O(4) atoms to form GaO4 tetrahedra that share  a cornercorner with one Mg(2)O6 octahedra, corners with two equivalent Mg(3)O6 octahedra, corners with two equivalent Ga(2)O6 octahedra, corners with three equivalent Mg(4)O6 octahedra, and corners with four equivalent Ga(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-57°. In the second Ga site, Ga(2) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(8) atom to form GaO6 octahedra that share  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Ga(9)O4 tetrahedra, corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Ga(7)O4 tetrahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Ga(3)O6 octahedra, edges with two equivalent Mg(2)O6 octahedra, and edges with two equivalent Ga(2)O6 octahedra. In the third Ga site, Ga(3) is bonded to one O(16), one O(3), two equivalent O(1), and two equivalent O(17) atoms to form GaO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Ga(9)O4 tetrahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra, edges with two equivalent Ga(2)O6 octahedra, and edges with two equivalent Ga(6)O6 octahedra. In the fourth Ga site, Ga(4) is bonded to one O(11), one O(12), one O(14), one O(4), one O(7), and one O(9) atom to form GaO6 octahedra that share  a cornercorner with one Ga(5)O4 tetrahedra,  a cornercorner with one Ga(7)O4 tetrahedra, corners with two equivalent Ga(1)O4 tetrahedra, corners with two equivalent Ga(8)O4 tetrahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, and edges with two equivalent Ga(4)O6 octahedra. In the fifth Ga site, Ga(5) is bonded to one O(15), one O(7), and two equivalent O(10) atoms to form GaO4 tetrahedra that share  a cornercorner with one Mg(3)O6 octahedra, corners with two equivalent Mg(5)O6 octahedra, corners with two equivalent Ga(4)O6 octahedra, corners with three equivalent Mg(6)O6 octahedra, and corners with four equivalent Ga(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-57°. In the sixth Ga site, Ga(6) is bonded to one O(10), one O(13), one O(15), one O(16), one O(17), and one O(18) atom to form GaO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Ga(8)O4 tetrahedra, corners with two equivalent Ga(5)O4 tetrahedra, corners with two equivalent Ga(9)O4 tetrahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Ga(3)O6 octahedra, edges with two equivalent Mg(5)O6 octahedra, and edges with two equivalent Ga(6)O6 octahedra. In the seventh Ga site, Ga(7) is bonded to one O(14), one O(5), and two equivalent O(6) atoms to form GaO4 tetrahedra that share  a cornercorner with one Mg(3)O6 octahedra, corners with two equivalent Mg(2)O6 octahedra, corners with two equivalent Ga(4)O6 octahedra, corners with three equivalent Mg(4)O6 octahedra, and corners with four equivalent Ga(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-57°. In the eighth Ga site, Ga(8) is bonded to one O(11), one O(18), and two equivalent O(12) atoms to form GaO4 tetrahedra that share  a cornercorner with one Mg(5)O6 octahedra, corners with two equivalent Mg(3)O6 octahedra, corners with two equivalent Ga(6)O6 octahedra, corners with three equivalent Mg(6)O6 octahedra, and corners with four equivalent Ga(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-58°. In the ninth Ga site, Ga(9) is bonded to one O(16), one O(8), and two equivalent O(17) atoms to form GaO4 tetrahedra that share  a cornercorner with one Mg(2)O6 octahedra, corners with two equivalent Mg(5)O6 octahedra, corners with two equivalent Ga(2)O6 octahedra, corners with three equivalent Ga(3)O6 octahedra, and corners with four equivalent Ga(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-59°. 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 Mg(2), one Ga(2), and one Ga(3) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(2), one Ga(1), and two equivalent Ga(2) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ga(3), and two equivalent Ga(2) atoms. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(3), one Mg(4), one Ga(1), and one Ga(4) atom. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Mg(4), one Ga(7), and two equivalent Ga(2) atoms. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Mg(2), one Mg(4), one Ga(2), and one Ga(7) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Mg(3), one Ga(5), and two equivalent Ga(4) atoms. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Mg(2), one Ga(9), and two equivalent Ga(2) atoms. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Mg(4), one Ga(1), and two equivalent Ga(4) atoms. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Mg(5), one Mg(6), one Ga(5), and one Ga(6) atom. In the eleventh O site, O(11) is bonded in a rectangular see-saw-like geometry to one Mg(6), one Ga(8), and two equivalent Ga(4) atoms. In the twelfth O site, O(12) is bonded in a distorted rectangular see-saw-like geometry to one Mg(3), one Mg(6), one Ga(4), and one Ga(8) atom. In the thirteenth O site, O(13) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(5), and two equivalent Ga(6) atoms. In the fourteenth O site, O(14) is bonded in a rectangular see-saw-like geometry to one Mg(3), one Ga(7), and two equivalent Ga(4) atoms. In the fifteenth O site, O(15) is bonded in a rectangular see-saw-like geometry to one Mg(6), one Ga(5), and two equivalent Ga(6) atoms. In the sixteenth O site, O(16) is bonded to one Ga(3), one Ga(9), and two equivalent Ga(6) atoms to form a mixture of distorted corner and edge-sharing OGa4 trigonal pyramids. In the seventeenth O site, O(17) is bonded to one Mg(5), one Ga(3), one Ga(6), and one Ga(9) atom to form distorted OMgGa3 trigonal pyramids that share  a cornercorner with one O(16)Ga4 trigonal pyramid,  a cornercorner with one O(17)MgGa3 trigonal pyramid,  an edgeedge with one O(16)Ga4 trigonal pyramid,  an edgeedge with one O(17)MgGa3 trigonal pyramid, and  an edgeedge with one O(18)MgGa3 trigonal pyramid. In the eighteenth O site, O(18) is bonded to one Mg(5), one Ga(8), and two equivalent Ga(6) atoms to form distorted OMgGa3 trigonal pyramids that share  an edgeedge with one O(16)Ga4 trigonal pyramid and edges with two equivalent O(17)MgGa3 trigonal pyramids. is represented by the CIF file [CIF]
data_Mg(GaO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.931
_cell_length_b   5.931
_cell_length_c   14.495
_cell_angle_alpha   89.922
_cell_angle_beta   89.922
_cell_angle_gamma   60.559
_symmetry_Int_Tables_number   1
_cell_volume   444.119
_cell_formula_units_Z   6
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  0.338  0.338  0.041  1.0
  Mg  Mg1  1  0.834  0.834  0.168  1.0
  Mg  Mg2  1  0.500  0.500  0.500  1.0
  Mg  Mg3  1  0.666  0.666  0.333  1.0
  Mg  Mg4  1  0.167  0.167  0.832  1.0
  Mg  Mg5  1  0.333  0.333  0.666  1.0
  Ga  Ga6  1  0.006  0.006  0.380  1.0
  Ga  Ga7  1  0.835  0.329  0.168  1.0
  Ga  Ga8  1  1.000  1.000  0.004  1.0
  Ga  Ga9  1  0.329  0.835  0.168  1.0
  Ga  Ga10  1  0.500  0.999  0.500  1.0
  Ga  Ga11  1  0.673  0.673  0.709  1.0
  Ga  Ga12  1  0.999  0.500  0.500  1.0
  Ga  Ga13  1  0.169  0.662  0.832  1.0
  Ga  Ga14  1  0.327  0.327  0.289  1.0
  Ga  Ga15  1  0.662  0.169  0.832  1.0
  Ga  Ga16  1  0.993  0.993  0.622  1.0
  Ga  Ga17  1  0.660  0.660  0.959  1.0
  O  O18  1  0.699  0.159  0.086  1.0
  O  O19  1  0.159  0.699  0.086  1.0
  O  O20  1  0.003  0.003  0.248  1.0
  O  O21  1  0.154  0.154  0.088  1.0
  O  O22  1  0.351  0.832  0.421  1.0
  O  O23  1  0.505  0.505  0.245  1.0
  O  O24  1  0.501  0.983  0.246  1.0
  O  O25  1  0.671  0.671  0.577  1.0
  O  O26  1  0.832  0.351  0.421  1.0
  O  O27  1  0.663  0.663  0.089  1.0
  O  O28  1  0.828  0.828  0.421  1.0
  O  O29  1  0.983  0.501  0.246  1.0
  O  O30  1  0.014  0.499  0.753  1.0
  O  O31  1  0.172  0.172  0.579  1.0
  O  O32  1  0.168  0.649  0.579  1.0
  O  O33  1  0.499  0.014  0.753  1.0
  O  O34  1  0.340  0.340  0.903  1.0
  O  O35  1  0.329  0.329  0.422  1.0
  O  O36  1  0.497  0.497  0.753  1.0
  O  O37  1  0.649  0.168  0.579  1.0
  O  O38  1  0.841  0.841  0.915  1.0
  O  O39  1  0.840  0.310  0.916  1.0
  O  O40  1  0.995  0.995  0.756  1.0
  O  O41  1  0.310  0.840  0.916  1.0
[/CIF]
.