The material structure described by Er2MoO6 crystallizes in the monoclinic C2/c space group. There are three inequivalent Er sites. In the first Er site, Er(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), two equivalent O(1), two equivalent O(4), and two equivalent O(6) atoms. In the second Er site, Er(2) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(5) atoms. In the third Er site, Er(3) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Mo(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(3) is bonded in a 4-coordinate geometry to one Er(1), one Er(2), one Er(3), and one Mo(1) atom. In the second O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one Mo(1) atom. In the third O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Er(2) and one Mo(1) atom. In the fourth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Er(1) and one Mo(1) atom. In the fifth O site, O(1) is bonded to two equivalent Er(1) and two equivalent Er(3) atoms to form OEr4 tetrahedra that share corners with two equivalent O(1)Er4 tetrahedra, corners with four equivalent O(2)Er3Mo tetrahedra,  an edgeedge with one O(2)Er3Mo tetrahedra, and edges with three equivalent O(1)Er4 tetrahedra. In the sixth O site, O(2) is bonded to one Er(1), one Er(2), one Er(3), and one Mo(1) atom to form OEr3Mo tetrahedra that share corners with two equivalent O(2)Er3Mo tetrahedra, corners with four equivalent O(1)Er4 tetrahedra, and  an edgeedge with one O(1)Er4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er2MoO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.782
_cell_length_b   9.782
_cell_length_c   5.290
_cell_angle_alpha   74.776
_cell_angle_beta   74.776
_cell_angle_gamma   67.798
_symmetry_Int_Tables_number   1
_cell_volume   444.567
_cell_formula_units_Z   4
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
  Er  Er0  1  0.217  0.450  0.878  1.0
  Er  Er1  1  0.450  0.217  0.378  1.0
  Er  Er2  1  0.783  0.550  0.122  1.0
  Er  Er3  1  0.550  0.783  0.622  1.0
  Er  Er4  1  0.863  0.137  0.250  1.0
  Er  Er5  1  0.137  0.863  0.750  1.0
  Er  Er6  1  0.393  0.607  0.250  1.0
  Er  Er7  1  0.607  0.393  0.750  1.0
  Mo  Mo8  1  0.985  0.705  0.437  1.0
  Mo  Mo9  1  0.295  0.015  0.063  1.0
  Mo  Mo10  1  0.015  0.295  0.563  1.0
  Mo  Mo11  1  0.705  0.985  0.937  1.0
  O  O12  1  0.428  0.389  0.579  1.0
  O  O13  1  0.611  0.572  0.921  1.0
  O  O14  1  0.572  0.611  0.421  1.0
  O  O15  1  0.389  0.428  0.079  1.0
  O  O16  1  0.194  0.663  0.582  1.0
  O  O17  1  0.337  0.806  0.918  1.0
  O  O18  1  0.806  0.337  0.418  1.0
  O  O19  1  0.663  0.194  0.082  1.0
  O  O20  1  0.114  0.674  0.128  1.0
  O  O21  1  0.326  0.886  0.372  1.0
  O  O22  1  0.886  0.326  0.872  1.0
  O  O23  1  0.674  0.114  0.628  1.0
  O  O24  1  0.712  0.814  0.861  1.0
  O  O25  1  0.186  0.288  0.639  1.0
  O  O26  1  0.288  0.186  0.139  1.0
  O  O27  1  0.814  0.712  0.361  1.0
  O  O28  1  0.890  0.951  0.986  1.0
  O  O29  1  0.049  0.110  0.514  1.0
  O  O30  1  0.976  0.568  0.743  1.0
  O  O31  1  0.951  0.890  0.486  1.0
  O  O32  1  0.568  0.976  0.243  1.0
  O  O33  1  0.024  0.432  0.257  1.0
  O  O34  1  0.432  0.024  0.757  1.0
  O  O35  1  0.110  0.049  0.014  1.0
[/CIF]
.
The material structure described by Er2MoO6 crystallizes in the monoclinic C2/c space group. There are three inequivalent Er sites. In the first Er site, Er(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), two equivalent O(1), two equivalent O(4), and two equivalent O(6) atoms. In the second Er site, Er(2) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(5) atoms. In the third Er site, Er(3) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Mo(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(3) is bonded in a 4-coordinate geometry to one Er(1), one Er(2), one Er(3), and one Mo(1) atom. In the second O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one Mo(1) atom. In the third O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Er(2) and one Mo(1) atom. In the fourth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Er(1) and one Mo(1) atom. In the fifth O site, O(1) is bonded to two equivalent Er(1) and two equivalent Er(3) atoms to form OEr4 tetrahedra that share corners with two equivalent O(1)Er4 tetrahedra, corners with four equivalent O(2)Er3Mo tetrahedra,  an edgeedge with one O(2)Er3Mo tetrahedra, and edges with three equivalent O(1)Er4 tetrahedra. In the sixth O site, O(2) is bonded to one Er(1), one Er(2), one Er(3), and one Mo(1) atom to form OEr3Mo tetrahedra that share corners with two equivalent O(2)Er3Mo tetrahedra, corners with four equivalent O(1)Er4 tetrahedra, and  an edgeedge with one O(1)Er4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er2MoO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.782
_cell_length_b   9.782
_cell_length_c   5.290
_cell_angle_alpha   74.776
_cell_angle_beta   74.776
_cell_angle_gamma   67.798
_symmetry_Int_Tables_number   1
_cell_volume   444.567
_cell_formula_units_Z   4
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
  Er  Er0  1  0.217  0.450  0.878  1.0
  Er  Er1  1  0.450  0.217  0.378  1.0
  Er  Er2  1  0.783  0.550  0.122  1.0
  Er  Er3  1  0.550  0.783  0.622  1.0
  Er  Er4  1  0.863  0.137  0.250  1.0
  Er  Er5  1  0.137  0.863  0.750  1.0
  Er  Er6  1  0.393  0.607  0.250  1.0
  Er  Er7  1  0.607  0.393  0.750  1.0
  Mo  Mo8  1  0.985  0.705  0.437  1.0
  Mo  Mo9  1  0.295  0.015  0.063  1.0
  Mo  Mo10  1  0.015  0.295  0.563  1.0
  Mo  Mo11  1  0.705  0.985  0.937  1.0
  O  O12  1  0.428  0.389  0.579  1.0
  O  O13  1  0.611  0.572  0.921  1.0
  O  O14  1  0.572  0.611  0.421  1.0
  O  O15  1  0.389  0.428  0.079  1.0
  O  O16  1  0.194  0.663  0.582  1.0
  O  O17  1  0.337  0.806  0.918  1.0
  O  O18  1  0.806  0.337  0.418  1.0
  O  O19  1  0.663  0.194  0.082  1.0
  O  O20  1  0.114  0.674  0.128  1.0
  O  O21  1  0.326  0.886  0.372  1.0
  O  O22  1  0.886  0.326  0.872  1.0
  O  O23  1  0.674  0.114  0.628  1.0
  O  O24  1  0.712  0.814  0.861  1.0
  O  O25  1  0.186  0.288  0.639  1.0
  O  O26  1  0.288  0.186  0.139  1.0
  O  O27  1  0.814  0.712  0.361  1.0
  O  O28  1  0.890  0.951  0.986  1.0
  O  O29  1  0.049  0.110  0.514  1.0
  O  O30  1  0.976  0.568  0.743  1.0
  O  O31  1  0.951  0.890  0.486  1.0
  O  O32  1  0.568  0.976  0.243  1.0
  O  O33  1  0.024  0.432  0.257  1.0
  O  O34  1  0.432  0.024  0.757  1.0
  O  O35  1  0.110  0.049  0.014  1.0
[/CIF]
.