The crystal structure described by RbEr(MoO4)2 crystallizes in the monoclinic C2/c space group. Rb(1) is bonded in a 12-coordinate geometry to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms. Er(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), and four equivalent O(2) atoms. Mo(1) is bonded in a 6-coordinate geometry to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and two equivalent Mo(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Rb(1), two equivalent Er(1), and one Mo(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Rb(1), one Er(1), and two equivalent Mo(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Rb(1), one Er(1), and one Mo(1) atom. is represented by the CIF file [CIF]
data_RbEr(MoO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.497
_cell_length_b   7.497
_cell_length_c   7.729
_cell_angle_alpha   61.980
_cell_angle_beta   61.980
_cell_angle_gamma   88.290
_symmetry_Int_Tables_number   1
_cell_volume   328.201
_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  0.199  0.801  0.750  1.0
  Rb  Rb1  1  0.801  0.199  0.250  1.0
  Er  Er2  1  0.771  0.229  0.750  1.0
  Er  Er3  1  0.229  0.771  0.250  1.0
  Mo  Mo4  1  0.696  0.696  0.763  1.0
  Mo  Mo5  1  0.304  0.304  0.237  1.0
  Mo  Mo6  1  0.304  0.304  0.737  1.0
  Mo  Mo7  1  0.696  0.696  0.263  1.0
  O  O8  1  0.615  0.766  0.561  1.0
  O  O9  1  0.385  0.234  0.439  1.0
  O  O10  1  0.234  0.385  0.939  1.0
  O  O11  1  0.766  0.615  0.061  1.0
  O  O12  1  0.383  0.066  0.877  1.0
  O  O13  1  0.617  0.934  0.123  1.0
  O  O14  1  0.934  0.617  0.623  1.0
  O  O15  1  0.066  0.383  0.377  1.0
  O  O16  1  0.586  0.367  0.969  1.0
  O  O17  1  0.414  0.633  0.031  1.0
  O  O18  1  0.633  0.414  0.531  1.0
  O  O19  1  0.367  0.586  0.469  1.0
  O  O20  1  0.793  0.955  0.691  1.0
  O  O21  1  0.207  0.045  0.309  1.0
  O  O22  1  0.045  0.207  0.809  1.0
  O  O23  1  0.955  0.793  0.191  1.0
[/CIF]
.
The crystal structure described by RbEr(MoO4)2 crystallizes in the monoclinic C2/c space group. Rb(1) is bonded in a 12-coordinate geometry to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms. Er(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), and four equivalent O(2) atoms. Mo(1) is bonded in a 6-coordinate geometry to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and two equivalent Mo(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Rb(1), two equivalent Er(1), and one Mo(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Rb(1), one Er(1), and two equivalent Mo(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Rb(1), one Er(1), and one Mo(1) atom. is represented by the CIF file [CIF]
data_RbEr(MoO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.497
_cell_length_b   7.497
_cell_length_c   7.729
_cell_angle_alpha   61.980
_cell_angle_beta   61.980
_cell_angle_gamma   88.290
_symmetry_Int_Tables_number   1
_cell_volume   328.201
_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  0.199  0.801  0.750  1.0
  Rb  Rb1  1  0.801  0.199  0.250  1.0
  Er  Er2  1  0.771  0.229  0.750  1.0
  Er  Er3  1  0.229  0.771  0.250  1.0
  Mo  Mo4  1  0.696  0.696  0.763  1.0
  Mo  Mo5  1  0.304  0.304  0.237  1.0
  Mo  Mo6  1  0.304  0.304  0.737  1.0
  Mo  Mo7  1  0.696  0.696  0.263  1.0
  O  O8  1  0.615  0.766  0.561  1.0
  O  O9  1  0.385  0.234  0.439  1.0
  O  O10  1  0.234  0.385  0.939  1.0
  O  O11  1  0.766  0.615  0.061  1.0
  O  O12  1  0.383  0.066  0.877  1.0
  O  O13  1  0.617  0.934  0.123  1.0
  O  O14  1  0.934  0.617  0.623  1.0
  O  O15  1  0.066  0.383  0.377  1.0
  O  O16  1  0.586  0.367  0.969  1.0
  O  O17  1  0.414  0.633  0.031  1.0
  O  O18  1  0.633  0.414  0.531  1.0
  O  O19  1  0.367  0.586  0.469  1.0
  O  O20  1  0.793  0.955  0.691  1.0
  O  O21  1  0.207  0.045  0.309  1.0
  O  O22  1  0.045  0.207  0.809  1.0
  O  O23  1  0.955  0.793  0.191  1.0
[/CIF]
.