The crystal structure described by Mg2LaTaO6 crystallizes in the orthorhombic Imma space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a square co-planar geometry to four equivalent O(3) atoms. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. La(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form distorted LaO6 octahedra that share corners with two equivalent La(1)O6 octahedra and edges with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles are 77°. Ta(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra and edges with two equivalent La(1)O6 octahedra. The corner-sharing octahedral tilt angles are 45°. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(2) and two equivalent La(1) atoms to form OLa2Mg2 tetrahedra that share corners with two equivalent O(2)Mg2Ta2 tetrahedra, corners with four equivalent O(1)La2Mg2 tetrahedra, and  an edgeedge with one O(2)Mg2Ta2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Mg(2) and two equivalent Ta(1) atoms to form distorted OMg2Ta2 tetrahedra that share corners with two equivalent O(1)La2Mg2 tetrahedra, corners with four equivalent O(2)Mg2Ta2 tetrahedra, and  an edgeedge with one O(1)La2Mg2 tetrahedra. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one La(1), and one Ta(1) atom. is represented by the CIF file [CIF]
data_LaMg2TaO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.335
_cell_length_b   6.841
_cell_length_c   7.601
_cell_angle_alpha   90.000
_cell_angle_beta   58.795
_cell_angle_gamma   117.793
_symmetry_Int_Tables_number   1
_cell_volume   273.482
_cell_formula_units_Z   2
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
  La  La0  1  0.000  0.000  0.500  1.0
  La  La1  1  0.000  0.000  0.000  1.0
  Mg  Mg2  1  0.500  0.500  0.000  1.0
  Mg  Mg3  1  0.500  0.000  0.000  1.0
  Mg  Mg4  1  0.500  0.000  0.500  1.0
  Mg  Mg5  1  0.500  0.500  0.500  1.0
  Ta  Ta6  1  0.000  0.500  0.000  1.0
  Ta  Ta7  1  0.000  0.500  0.500  1.0
  O  O8  1  0.712  0.856  0.394  1.0
  O  O9  1  0.150  0.575  0.675  1.0
  O  O10  1  0.242  0.833  0.943  1.0
  O  O11  1  0.242  0.408  0.315  1.0
  O  O12  1  0.242  0.408  0.943  1.0
  O  O13  1  0.242  0.833  0.315  1.0
  O  O14  1  0.288  0.144  0.606  1.0
  O  O15  1  0.850  0.425  0.325  1.0
  O  O16  1  0.758  0.167  0.057  1.0
  O  O17  1  0.758  0.592  0.685  1.0
  O  O18  1  0.758  0.592  0.057  1.0
  O  O19  1  0.758  0.167  0.685  1.0
[/CIF]
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The crystal structure described by Mg2LaTaO6 crystallizes in the orthorhombic Imma space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a square co-planar geometry to four equivalent O(3) atoms. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. La(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form distorted LaO6 octahedra that share corners with two equivalent La(1)O6 octahedra and edges with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles are 77°. Ta(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra and edges with two equivalent La(1)O6 octahedra. The corner-sharing octahedral tilt angles are 45°. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(2) and two equivalent La(1) atoms to form OLa2Mg2 tetrahedra that share corners with two equivalent O(2)Mg2Ta2 tetrahedra, corners with four equivalent O(1)La2Mg2 tetrahedra, and  an edgeedge with one O(2)Mg2Ta2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Mg(2) and two equivalent Ta(1) atoms to form distorted OMg2Ta2 tetrahedra that share corners with two equivalent O(1)La2Mg2 tetrahedra, corners with four equivalent O(2)Mg2Ta2 tetrahedra, and  an edgeedge with one O(1)La2Mg2 tetrahedra. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one La(1), and one Ta(1) atom. is represented by the CIF file [CIF]
data_LaMg2TaO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.335
_cell_length_b   6.841
_cell_length_c   7.601
_cell_angle_alpha   90.000
_cell_angle_beta   58.795
_cell_angle_gamma   117.793
_symmetry_Int_Tables_number   1
_cell_volume   273.482
_cell_formula_units_Z   2
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
  La  La0  1  0.000  0.000  0.500  1.0
  La  La1  1  0.000  0.000  0.000  1.0
  Mg  Mg2  1  0.500  0.500  0.000  1.0
  Mg  Mg3  1  0.500  0.000  0.000  1.0
  Mg  Mg4  1  0.500  0.000  0.500  1.0
  Mg  Mg5  1  0.500  0.500  0.500  1.0
  Ta  Ta6  1  0.000  0.500  0.000  1.0
  Ta  Ta7  1  0.000  0.500  0.500  1.0
  O  O8  1  0.712  0.856  0.394  1.0
  O  O9  1  0.150  0.575  0.675  1.0
  O  O10  1  0.242  0.833  0.943  1.0
  O  O11  1  0.242  0.408  0.315  1.0
  O  O12  1  0.242  0.408  0.943  1.0
  O  O13  1  0.242  0.833  0.315  1.0
  O  O14  1  0.288  0.144  0.606  1.0
  O  O15  1  0.850  0.425  0.325  1.0
  O  O16  1  0.758  0.167  0.057  1.0
  O  O17  1  0.758  0.592  0.685  1.0
  O  O18  1  0.758  0.592  0.057  1.0
  O  O19  1  0.758  0.167  0.685  1.0
[/CIF]
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