The material structure described by Rb2LaNb2O7 crystallizes in the orthorhombic Cmcm space group. Rb(1) is bonded in a 9-coordinate geometry to two equivalent O(3), two equivalent O(4), and five equivalent O(2) atoms. La(1) is bonded in a 11-coordinate geometry to three equivalent O(1), four equivalent O(3), and four equivalent O(4) atoms. Nb(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 8-25°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to three equivalent La(1) and two equivalent Nb(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to five equivalent Rb(1) and one Nb(1) atom. In the third O site, O(3) is bonded in a distorted linear geometry to two equivalent Rb(1), two equivalent La(1), and two equivalent Nb(1) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Rb(1), two equivalent La(1), and two equivalent Nb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2LaNb2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.712
_cell_length_b   11.712
_cell_length_c   5.772
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   151.460
_symmetry_Int_Tables_number   1
_cell_volume   378.277
_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
  Rb  Rb0  1  0.931  0.547  0.250  1.0
  Rb  Rb1  1  0.453  0.069  0.750  1.0
  Rb  Rb2  1  0.069  0.453  0.750  1.0
  Rb  Rb3  1  0.547  0.931  0.250  1.0
  La  La4  1  0.262  0.262  0.750  1.0
  La  La5  1  0.738  0.738  0.250  1.0
  Nb  Nb6  1  0.343  0.156  0.250  1.0
  Nb  Nb7  1  0.844  0.657  0.750  1.0
  Nb  Nb8  1  0.657  0.844  0.750  1.0
  Nb  Nb9  1  0.156  0.343  0.250  1.0
  O  O10  1  0.700  0.700  0.750  1.0
  O  O11  1  0.300  0.300  0.250  1.0
  O  O12  1  0.946  0.594  0.750  1.0
  O  O13  1  0.406  0.054  0.250  1.0
  O  O14  1  0.054  0.406  0.250  1.0
  O  O15  1  0.594  0.946  0.750  1.0
  O  O16  1  0.587  0.413  0.500  1.0
  O  O17  1  0.587  0.413  0.000  1.0
  O  O18  1  0.413  0.587  0.500  1.0
  O  O19  1  0.413  0.587  0.000  1.0
  O  O20  1  0.073  0.927  0.500  1.0
  O  O21  1  0.073  0.927  0.000  1.0
  O  O22  1  0.927  0.073  0.500  1.0
  O  O23  1  0.927  0.073  0.000  1.0
[/CIF]
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The material structure described by Rb2LaNb2O7 crystallizes in the orthorhombic Cmcm space group. Rb(1) is bonded in a 9-coordinate geometry to two equivalent O(3), two equivalent O(4), and five equivalent O(2) atoms. La(1) is bonded in a 11-coordinate geometry to three equivalent O(1), four equivalent O(3), and four equivalent O(4) atoms. Nb(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 8-25°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to three equivalent La(1) and two equivalent Nb(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to five equivalent Rb(1) and one Nb(1) atom. In the third O site, O(3) is bonded in a distorted linear geometry to two equivalent Rb(1), two equivalent La(1), and two equivalent Nb(1) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Rb(1), two equivalent La(1), and two equivalent Nb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2LaNb2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.712
_cell_length_b   11.712
_cell_length_c   5.772
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   151.460
_symmetry_Int_Tables_number   1
_cell_volume   378.277
_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
  Rb  Rb0  1  0.931  0.547  0.250  1.0
  Rb  Rb1  1  0.453  0.069  0.750  1.0
  Rb  Rb2  1  0.069  0.453  0.750  1.0
  Rb  Rb3  1  0.547  0.931  0.250  1.0
  La  La4  1  0.262  0.262  0.750  1.0
  La  La5  1  0.738  0.738  0.250  1.0
  Nb  Nb6  1  0.343  0.156  0.250  1.0
  Nb  Nb7  1  0.844  0.657  0.750  1.0
  Nb  Nb8  1  0.657  0.844  0.750  1.0
  Nb  Nb9  1  0.156  0.343  0.250  1.0
  O  O10  1  0.700  0.700  0.750  1.0
  O  O11  1  0.300  0.300  0.250  1.0
  O  O12  1  0.946  0.594  0.750  1.0
  O  O13  1  0.406  0.054  0.250  1.0
  O  O14  1  0.054  0.406  0.250  1.0
  O  O15  1  0.594  0.946  0.750  1.0
  O  O16  1  0.587  0.413  0.500  1.0
  O  O17  1  0.587  0.413  0.000  1.0
  O  O18  1  0.413  0.587  0.500  1.0
  O  O19  1  0.413  0.587  0.000  1.0
  O  O20  1  0.073  0.927  0.500  1.0
  O  O21  1  0.073  0.927  0.000  1.0
  O  O22  1  0.927  0.073  0.500  1.0
  O  O23  1  0.927  0.073  0.000  1.0
[/CIF]
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