The material structure described by MgCe2V2O8 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form MgO4 tetrahedra that share corners with two equivalent V(2)O6 octahedra and  an edgeedge with one V(1)O6 octahedra. The corner-sharing octahedral tilt angles are 57°. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. In the second Ce site, Ce(2) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form VO6 octahedra that share edges with two equivalent V(2)O6 octahedra and  an edgeedge with one Mg(1)O4 tetrahedra. In the second V site, V(2) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form distorted VO6 octahedra that share corners with two equivalent Mg(1)O4 tetrahedra and edges with two equivalent V(1)O6 octahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to one Mg(1), one Ce(1), and one V(1) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Mg(1), one Ce(1), and one V(1) atom. In the third O site, O(3) is bonded to one Ce(1), one Ce(2), one V(1), and one V(2) atom to form a mixture of distorted edge and corner-sharing OCe2V2 trigonal pyramids. In the fourth O site, O(4) is bonded to one Ce(1), one Ce(2), one V(1), and one V(2) atom to form a mixture of distorted edge and corner-sharing OCe2V2 trigonal pyramids. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Ce(2), and one V(2) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Ce(2), and one V(2) atom. In the seventh O site, O(7) is bonded to one Ce(1), one Ce(2), one V(1), and one V(2) atom to form a mixture of distorted edge and corner-sharing OCe2V2 trigonal pyramids. In the eighth O site, O(8) is bonded to one Ce(1), one Ce(2), one V(1), and one V(2) atom to form a mixture of distorted edge and corner-sharing OCe2V2 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce2MgV2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.138
_cell_length_b   5.324
_cell_length_c   7.930
_cell_angle_alpha   105.735
_cell_angle_beta   104.673
_cell_angle_gamma   101.926
_symmetry_Int_Tables_number   1
_cell_volume   192.962
_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
  Ce  Ce0  1  0.599  0.851  0.200  1.0
  Ce  Ce1  1  0.420  0.169  0.838  1.0
  Mg  Mg2  1  0.269  0.517  0.536  1.0
  V  V3  1  0.068  0.319  0.137  1.0
  V  V4  1  0.936  0.686  0.872  1.0
  O  O5  1  0.374  0.637  0.340  1.0
  O  O6  1  0.966  0.204  0.339  1.0
  O  O7  1  0.206  0.480  0.949  1.0
  O  O8  1  0.743  0.969  0.948  1.0
  O  O9  1  0.576  0.410  0.683  1.0
  O  O10  1  0.109  0.772  0.684  1.0
  O  O11  1  0.791  0.528  0.071  1.0
  O  O12  1  0.280  0.045  0.071  1.0
[/CIF]
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The material structure described by MgCe2V2O8 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form MgO4 tetrahedra that share corners with two equivalent V(2)O6 octahedra and  an edgeedge with one V(1)O6 octahedra. The corner-sharing octahedral tilt angles are 57°. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. In the second Ce site, Ce(2) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form VO6 octahedra that share edges with two equivalent V(2)O6 octahedra and  an edgeedge with one Mg(1)O4 tetrahedra. In the second V site, V(2) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form distorted VO6 octahedra that share corners with two equivalent Mg(1)O4 tetrahedra and edges with two equivalent V(1)O6 octahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to one Mg(1), one Ce(1), and one V(1) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Mg(1), one Ce(1), and one V(1) atom. In the third O site, O(3) is bonded to one Ce(1), one Ce(2), one V(1), and one V(2) atom to form a mixture of distorted edge and corner-sharing OCe2V2 trigonal pyramids. In the fourth O site, O(4) is bonded to one Ce(1), one Ce(2), one V(1), and one V(2) atom to form a mixture of distorted edge and corner-sharing OCe2V2 trigonal pyramids. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Ce(2), and one V(2) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Ce(2), and one V(2) atom. In the seventh O site, O(7) is bonded to one Ce(1), one Ce(2), one V(1), and one V(2) atom to form a mixture of distorted edge and corner-sharing OCe2V2 trigonal pyramids. In the eighth O site, O(8) is bonded to one Ce(1), one Ce(2), one V(1), and one V(2) atom to form a mixture of distorted edge and corner-sharing OCe2V2 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce2MgV2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.138
_cell_length_b   5.324
_cell_length_c   7.930
_cell_angle_alpha   105.735
_cell_angle_beta   104.673
_cell_angle_gamma   101.926
_symmetry_Int_Tables_number   1
_cell_volume   192.962
_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
  Ce  Ce0  1  0.599  0.851  0.200  1.0
  Ce  Ce1  1  0.420  0.169  0.838  1.0
  Mg  Mg2  1  0.269  0.517  0.536  1.0
  V  V3  1  0.068  0.319  0.137  1.0
  V  V4  1  0.936  0.686  0.872  1.0
  O  O5  1  0.374  0.637  0.340  1.0
  O  O6  1  0.966  0.204  0.339  1.0
  O  O7  1  0.206  0.480  0.949  1.0
  O  O8  1  0.743  0.969  0.948  1.0
  O  O9  1  0.576  0.410  0.683  1.0
  O  O10  1  0.109  0.772  0.684  1.0
  O  O11  1  0.791  0.528  0.071  1.0
  O  O12  1  0.280  0.045  0.071  1.0
[/CIF]
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