The material structure described by Rb2MgNd2(WO4)4 crystallizes in the triclinic P1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(14), one O(3), one O(6), one O(7), and one O(9) atom. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one Mg(1), one O(11), one O(12), one O(14), one O(15), one O(2), one O(4), one O(6), and one O(8) atom. Mg(1) is bonded in a 4-coordinate geometry to one Rb(2), one O(13), one O(15), one O(3), and one O(5) atom. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 7-coordinate geometry to one O(11), one O(12), one O(15), one O(2), one O(4), one O(7), and one O(8) atom. In the second Nd site, Nd(2) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(16), one O(3), one O(4), one O(7), and one O(9) atom. There are four inequivalent W sites. In the first W site, W(1) is bonded to one O(11), one O(14), one O(15), one O(16), one O(5), and one O(7) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 36-48°. In the second W site, W(2) is bonded to one O(1), one O(10), one O(12), one O(14), one O(5), and one O(8) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 36-48°. In the third W site, W(3) is bonded to one O(11), one O(13), one O(16), one O(4), one O(6), and one O(9) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 37-50°. In the fourth W site, W(4) is bonded to one O(1), one O(13), one O(2), one O(3), one O(6), and one O(8) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 37-50°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Rb(1), one Nd(2), one W(2), and one W(4) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Rb(2), one Nd(1), and one W(4) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Rb(1), one Mg(1), one Nd(2), and one W(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Rb(2), one Nd(1), one Nd(2), and one W(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one W(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(2), one W(3), and one W(4) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Rb(1), one Nd(1), one Nd(2), and one W(1) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Rb(2), one Nd(1), one W(2), and one W(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Rb(1), one Nd(2), and one W(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Rb(1), one Nd(2), and one W(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Rb(2), one Nd(1), one W(1), and one W(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one Rb(2), one Nd(1), and one W(2) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Mg(1), one W(3), and one W(4) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(2), one W(1), and one W(2) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one Rb(2), one Mg(1), one Nd(1), and one W(1) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal non-coplanar geometry to one Nd(2), one W(1), and one W(3) atom. is represented by the CIF card [CIF]
data_Rb2Nd2Mg(WO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.597
_cell_length_b   8.215
_cell_length_c   7.573
_cell_angle_alpha   62.993
_cell_angle_beta   61.892
_cell_angle_gamma   87.392
_symmetry_Int_Tables_number   1
_cell_volume   362.776
_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  0.769  0.136  0.783  1.0
  Rb  Rb1  1  0.262  0.876  0.178  1.0
  Nd  Nd2  1  0.247  0.800  0.730  1.0
  Nd  Nd3  1  0.751  0.201  0.258  1.0
  Mg  Mg4  1  0.008  0.519  0.610  1.0
  W  W5  1  0.680  0.688  0.810  1.0
  W  W6  1  0.706  0.673  0.305  1.0
  W  W7  1  0.302  0.318  0.195  1.0
  W  W8  1  0.308  0.319  0.692  1.0
  O  O9  1  0.618  0.388  0.445  1.0
  O  O10  1  0.260  0.069  0.777  1.0
  O  O11  1  0.020  0.330  0.879  1.0
  O  O12  1  0.367  0.098  0.361  1.0
  O  O13  1  0.772  0.606  0.559  1.0
  O  O14  1  0.373  0.268  0.943  1.0
  O  O15  1  0.627  0.915  0.644  1.0
  O  O16  1  0.392  0.607  0.550  1.0
  O  O17  1  0.029  0.237  0.312  1.0
  O  O18  1  0.723  0.919  0.242  1.0
  O  O19  1  0.358  0.589  0.978  1.0
  O  O20  1  0.971  0.679  0.112  1.0
  O  O21  1  0.220  0.395  0.441  1.0
  O  O22  1  0.633  0.732  0.072  1.0
  O  O23  1  0.981  0.731  0.682  1.0
  O  O24  1  0.624  0.415  0.031  1.0
[/CIF]
.
The material structure described by Rb2MgNd2(WO4)4 crystallizes in the triclinic P1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(14), one O(3), one O(6), one O(7), and one O(9) atom. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one Mg(1), one O(11), one O(12), one O(14), one O(15), one O(2), one O(4), one O(6), and one O(8) atom. Mg(1) is bonded in a 4-coordinate geometry to one Rb(2), one O(13), one O(15), one O(3), and one O(5) atom. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 7-coordinate geometry to one O(11), one O(12), one O(15), one O(2), one O(4), one O(7), and one O(8) atom. In the second Nd site, Nd(2) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(16), one O(3), one O(4), one O(7), and one O(9) atom. There are four inequivalent W sites. In the first W site, W(1) is bonded to one O(11), one O(14), one O(15), one O(16), one O(5), and one O(7) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 36-48°. In the second W site, W(2) is bonded to one O(1), one O(10), one O(12), one O(14), one O(5), and one O(8) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 36-48°. In the third W site, W(3) is bonded to one O(11), one O(13), one O(16), one O(4), one O(6), and one O(9) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 37-50°. In the fourth W site, W(4) is bonded to one O(1), one O(13), one O(2), one O(3), one O(6), and one O(8) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 37-50°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Rb(1), one Nd(2), one W(2), and one W(4) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Rb(2), one Nd(1), and one W(4) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Rb(1), one Mg(1), one Nd(2), and one W(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Rb(2), one Nd(1), one Nd(2), and one W(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one W(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(2), one W(3), and one W(4) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Rb(1), one Nd(1), one Nd(2), and one W(1) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Rb(2), one Nd(1), one W(2), and one W(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Rb(1), one Nd(2), and one W(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Rb(1), one Nd(2), and one W(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Rb(2), one Nd(1), one W(1), and one W(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one Rb(2), one Nd(1), and one W(2) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Mg(1), one W(3), and one W(4) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(2), one W(1), and one W(2) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one Rb(2), one Mg(1), one Nd(1), and one W(1) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal non-coplanar geometry to one Nd(2), one W(1), and one W(3) atom. is represented by the CIF card [CIF]
data_Rb2Nd2Mg(WO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.597
_cell_length_b   8.215
_cell_length_c   7.573
_cell_angle_alpha   62.993
_cell_angle_beta   61.892
_cell_angle_gamma   87.392
_symmetry_Int_Tables_number   1
_cell_volume   362.776
_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  0.769  0.136  0.783  1.0
  Rb  Rb1  1  0.262  0.876  0.178  1.0
  Nd  Nd2  1  0.247  0.800  0.730  1.0
  Nd  Nd3  1  0.751  0.201  0.258  1.0
  Mg  Mg4  1  0.008  0.519  0.610  1.0
  W  W5  1  0.680  0.688  0.810  1.0
  W  W6  1  0.706  0.673  0.305  1.0
  W  W7  1  0.302  0.318  0.195  1.0
  W  W8  1  0.308  0.319  0.692  1.0
  O  O9  1  0.618  0.388  0.445  1.0
  O  O10  1  0.260  0.069  0.777  1.0
  O  O11  1  0.020  0.330  0.879  1.0
  O  O12  1  0.367  0.098  0.361  1.0
  O  O13  1  0.772  0.606  0.559  1.0
  O  O14  1  0.373  0.268  0.943  1.0
  O  O15  1  0.627  0.915  0.644  1.0
  O  O16  1  0.392  0.607  0.550  1.0
  O  O17  1  0.029  0.237  0.312  1.0
  O  O18  1  0.723  0.919  0.242  1.0
  O  O19  1  0.358  0.589  0.978  1.0
  O  O20  1  0.971  0.679  0.112  1.0
  O  O21  1  0.220  0.395  0.441  1.0
  O  O22  1  0.633  0.732  0.072  1.0
  O  O23  1  0.981  0.731  0.682  1.0
  O  O24  1  0.624  0.415  0.031  1.0
[/CIF]
.