The compound described by Rb2Na2MgTi2O6 crystallizes in the triclinic P1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to one O(2), one O(6), and two equivalent O(3) atoms. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to one Mg(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(6) atom. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(4), and one O(5) atom. Mg(1) is bonded in a distorted trigonal non-coplanar geometry to one Rb(2), one O(3), one O(4), and one O(6) atom. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form distorted edge-sharing TiO5 trigonal bipyramids. In the second Ti site, Ti(2) is bonded to one O(1), one O(2), one O(4), one O(5), and one O(6) atom to form distorted edge-sharing TiO5 trigonal bipyramids. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted see-saw-like geometry to one Na(1), one Na(2), one Ti(1), and one Ti(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(2), one Na(1), one Ti(1), and one Ti(2) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Rb(2), two equivalent Rb(1), one Na(2), one Mg(1), and one Ti(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Rb(2), one Na(1), one Na(2), one Mg(1), one Ti(1), and one Ti(2) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Rb(2), one Na(1), one Na(2), one Ti(1), and one Ti(2) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Na(1), one Mg(1), and one Ti(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Na2MgTi2O6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.654
_cell_length_b   6.312
_cell_length_c   6.969
_cell_angle_alpha   56.570
_cell_angle_beta   94.474
_cell_angle_gamma   96.416
_symmetry_Int_Tables_number   1
_cell_volume   206.211
_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
  Rb  Rb0  1  0.298  0.251  0.483  1.0
  Rb  Rb1  1  0.702  0.754  0.659  1.0
  Na  Na2  1  0.233  0.561  0.844  1.0
  Na  Na3  1  0.787  0.313  0.176  1.0
  Mg  Mg4  1  0.887  0.629  0.348  1.0
  Ti  Ti5  1  0.766  0.062  0.906  1.0
  Ti  Ti6  1  0.300  0.939  0.093  1.0
  O  O7  1  0.032  0.184  0.012  1.0
  O  O8  1  0.455  0.838  0.924  1.0
  O  O9  1  0.794  0.257  0.568  1.0
  O  O10  1  0.969  0.759  0.026  1.0
  O  O11  1  0.525  0.242  0.949  1.0
  O  O12  1  0.216  0.742  0.408  1.0
[/CIF]
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The compound described by Rb2Na2MgTi2O6 crystallizes in the triclinic P1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to one O(2), one O(6), and two equivalent O(3) atoms. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to one Mg(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(6) atom. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(4), and one O(5) atom. Mg(1) is bonded in a distorted trigonal non-coplanar geometry to one Rb(2), one O(3), one O(4), and one O(6) atom. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form distorted edge-sharing TiO5 trigonal bipyramids. In the second Ti site, Ti(2) is bonded to one O(1), one O(2), one O(4), one O(5), and one O(6) atom to form distorted edge-sharing TiO5 trigonal bipyramids. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted see-saw-like geometry to one Na(1), one Na(2), one Ti(1), and one Ti(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(2), one Na(1), one Ti(1), and one Ti(2) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Rb(2), two equivalent Rb(1), one Na(2), one Mg(1), and one Ti(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Rb(2), one Na(1), one Na(2), one Mg(1), one Ti(1), and one Ti(2) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Rb(2), one Na(1), one Na(2), one Ti(1), and one Ti(2) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Na(1), one Mg(1), and one Ti(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Na2MgTi2O6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.654
_cell_length_b   6.312
_cell_length_c   6.969
_cell_angle_alpha   56.570
_cell_angle_beta   94.474
_cell_angle_gamma   96.416
_symmetry_Int_Tables_number   1
_cell_volume   206.211
_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
  Rb  Rb0  1  0.298  0.251  0.483  1.0
  Rb  Rb1  1  0.702  0.754  0.659  1.0
  Na  Na2  1  0.233  0.561  0.844  1.0
  Na  Na3  1  0.787  0.313  0.176  1.0
  Mg  Mg4  1  0.887  0.629  0.348  1.0
  Ti  Ti5  1  0.766  0.062  0.906  1.0
  Ti  Ti6  1  0.300  0.939  0.093  1.0
  O  O7  1  0.032  0.184  0.012  1.0
  O  O8  1  0.455  0.838  0.924  1.0
  O  O9  1  0.794  0.257  0.568  1.0
  O  O10  1  0.969  0.759  0.026  1.0
  O  O11  1  0.525  0.242  0.949  1.0
  O  O12  1  0.216  0.742  0.408  1.0
[/CIF]
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