The structure described by MgNd2(BiO4)2 crystallizes in the monoclinic C2 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted MgO6 octahedra that share edges with two equivalent Bi(1)O6 octahedra. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Nd site, Nd(2) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form distorted BiO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one Nd(1), and one Bi(1) atom. In the second O site, O(2) is bonded to one Mg(1), one Nd(1), one Nd(2), and one Bi(2) atom to form distorted ONd2MgBi tetrahedra that share corners with two equivalent O(2)Nd2MgBi tetrahedra, corners with six equivalent O(3)Nd2Bi2 tetrahedra, corners with four equivalent O(4)Nd2MgBi2 trigonal bipyramids,  an edgeedge with one O(2)Nd2MgBi tetrahedra, and edges with two equivalent O(4)Nd2MgBi2 trigonal bipyramids. In the third O site, O(3) is bonded to one Nd(1), one Nd(2), one Bi(1), and one Bi(2) atom to form distorted ONd2Bi2 tetrahedra that share corners with four equivalent O(3)Nd2Bi2 tetrahedra, corners with six equivalent O(2)Nd2MgBi tetrahedra, and edges with four equivalent O(4)Nd2MgBi2 trigonal bipyramids. In the fourth O site, O(4) is bonded to one Mg(1), one Nd(1), one Nd(2), one Bi(1), and one Bi(2) atom to form distorted ONd2MgBi2 trigonal bipyramids that share corners with four equivalent O(2)Nd2MgBi tetrahedra, corners with three equivalent O(4)Nd2MgBi2 trigonal bipyramids, edges with two equivalent O(2)Nd2MgBi tetrahedra, edges with four equivalent O(3)Nd2Bi2 tetrahedra, and  an edgeedge with one O(4)Nd2MgBi2 trigonal bipyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nd2Mg(BiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.481
_cell_length_b   7.481
_cell_length_c   7.042
_cell_angle_alpha   132.349
_cell_angle_beta   134.447
_cell_angle_gamma   72.940
_symmetry_Int_Tables_number   1
_cell_volume   195.691
_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
  Nd  Nd0  1  0.384  0.134  0.250  1.0
  Nd  Nd1  1  0.652  0.902  0.750  1.0
  Mg  Mg2  1  0.410  0.660  0.750  1.0
  Bi  Bi3  1  0.825  0.575  0.250  1.0
  Bi  Bi4  1  0.123  0.373  0.750  1.0
  O  O5  1  0.717  0.528  0.849  1.0
  O  O6  1  0.705  0.058  0.210  1.0
  O  O7  1  0.474  0.222  0.755  1.0
  O  O8  1  0.062  0.324  0.308  1.0
  O  O9  1  0.966  0.718  0.745  1.0
  O  O10  1  0.516  0.754  0.192  1.0
  O  O11  1  0.179  0.869  0.651  1.0
  O  O12  1  0.347  0.495  0.290  1.0
[/CIF]
.
The structure described by MgNd2(BiO4)2 crystallizes in the monoclinic C2 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted MgO6 octahedra that share edges with two equivalent Bi(1)O6 octahedra. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Nd site, Nd(2) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form distorted BiO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one Nd(1), and one Bi(1) atom. In the second O site, O(2) is bonded to one Mg(1), one Nd(1), one Nd(2), and one Bi(2) atom to form distorted ONd2MgBi tetrahedra that share corners with two equivalent O(2)Nd2MgBi tetrahedra, corners with six equivalent O(3)Nd2Bi2 tetrahedra, corners with four equivalent O(4)Nd2MgBi2 trigonal bipyramids,  an edgeedge with one O(2)Nd2MgBi tetrahedra, and edges with two equivalent O(4)Nd2MgBi2 trigonal bipyramids. In the third O site, O(3) is bonded to one Nd(1), one Nd(2), one Bi(1), and one Bi(2) atom to form distorted ONd2Bi2 tetrahedra that share corners with four equivalent O(3)Nd2Bi2 tetrahedra, corners with six equivalent O(2)Nd2MgBi tetrahedra, and edges with four equivalent O(4)Nd2MgBi2 trigonal bipyramids. In the fourth O site, O(4) is bonded to one Mg(1), one Nd(1), one Nd(2), one Bi(1), and one Bi(2) atom to form distorted ONd2MgBi2 trigonal bipyramids that share corners with four equivalent O(2)Nd2MgBi tetrahedra, corners with three equivalent O(4)Nd2MgBi2 trigonal bipyramids, edges with two equivalent O(2)Nd2MgBi tetrahedra, edges with four equivalent O(3)Nd2Bi2 tetrahedra, and  an edgeedge with one O(4)Nd2MgBi2 trigonal bipyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nd2Mg(BiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.481
_cell_length_b   7.481
_cell_length_c   7.042
_cell_angle_alpha   132.349
_cell_angle_beta   134.447
_cell_angle_gamma   72.940
_symmetry_Int_Tables_number   1
_cell_volume   195.691
_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
  Nd  Nd0  1  0.384  0.134  0.250  1.0
  Nd  Nd1  1  0.652  0.902  0.750  1.0
  Mg  Mg2  1  0.410  0.660  0.750  1.0
  Bi  Bi3  1  0.825  0.575  0.250  1.0
  Bi  Bi4  1  0.123  0.373  0.750  1.0
  O  O5  1  0.717  0.528  0.849  1.0
  O  O6  1  0.705  0.058  0.210  1.0
  O  O7  1  0.474  0.222  0.755  1.0
  O  O8  1  0.062  0.324  0.308  1.0
  O  O9  1  0.966  0.718  0.745  1.0
  O  O10  1  0.516  0.754  0.192  1.0
  O  O11  1  0.179  0.869  0.651  1.0
  O  O12  1  0.347  0.495  0.290  1.0
[/CIF]
.