The material structure described by MgEr2Mo2(O4Cl)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 6-coordinate geometry to one O(4), one O(5), one O(7), one O(8), one Cl(1), and one Cl(2) atom. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), one O(8), one Cl(1), and one Cl(2) atom. In the second Er site, Er(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), one O(7), one Cl(1), and one Cl(2) atom. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a distorted tetrahedral geometry to one O(1), one O(6), one O(7), and one O(8) atom. In the second Mo site, Mo(2) is bonded in a distorted tetrahedral geometry to one O(2), one O(3), one O(4), and one O(5) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Er(1), one Er(2), and one Mo(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Er(1), one Er(2), and one Mo(2) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Er(1), one Er(2), and one Mo(2) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Mg(1), one Er(2), and one Mo(2) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Mg(1), one Er(1), and one Mo(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Er(1), one Er(2), and one Mo(1) atom. In the seventh O site, O(7) is bonded in a T-shaped geometry to one Mg(1), one Er(2), and one Mo(1) atom. In the eighth O site, O(8) is bonded in a T-shaped geometry to one Mg(1), one Er(1), and one Mo(1) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Er(1), and one Er(2) atom. In the second Cl site, Cl(2) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Er(1), and one Er(2) atom. is represented by the CIF card [CIF]
data_Er2MgMo2(ClO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.476
_cell_length_b   6.472
_cell_length_c   6.924
_cell_angle_alpha   72.823
_cell_angle_beta   72.811
_cell_angle_gamma   65.831
_symmetry_Int_Tables_number   1
_cell_volume   247.790
_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
  Er  Er0  1  0.246  0.234  0.895  1.0
  Er  Er1  1  0.765  0.753  0.105  1.0
  Mg  Mg2  1  0.307  0.692  0.501  1.0
  Mo  Mo3  1  0.640  0.642  0.732  1.0
  Mo  Mo4  1  0.357  0.360  0.268  1.0
  Cl  Cl5  1  0.044  0.957  0.248  1.0
  Cl  Cl6  1  0.041  0.957  0.752  1.0
  O  O7  1  0.539  0.906  0.843  1.0
  O  O8  1  0.514  0.116  0.130  1.0
  O  O9  1  0.094  0.461  0.156  1.0
  O  O10  1  0.526  0.551  0.222  1.0
  O  O11  1  0.247  0.380  0.545  1.0
  O  O12  1  0.884  0.486  0.870  1.0
  O  O13  1  0.620  0.752  0.455  1.0
  O  O14  1  0.448  0.474  0.778  1.0
[/CIF]
.
The material structure described by MgEr2Mo2(O4Cl)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 6-coordinate geometry to one O(4), one O(5), one O(7), one O(8), one Cl(1), and one Cl(2) atom. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), one O(8), one Cl(1), and one Cl(2) atom. In the second Er site, Er(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), one O(7), one Cl(1), and one Cl(2) atom. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a distorted tetrahedral geometry to one O(1), one O(6), one O(7), and one O(8) atom. In the second Mo site, Mo(2) is bonded in a distorted tetrahedral geometry to one O(2), one O(3), one O(4), and one O(5) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Er(1), one Er(2), and one Mo(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Er(1), one Er(2), and one Mo(2) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Er(1), one Er(2), and one Mo(2) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Mg(1), one Er(2), and one Mo(2) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Mg(1), one Er(1), and one Mo(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Er(1), one Er(2), and one Mo(1) atom. In the seventh O site, O(7) is bonded in a T-shaped geometry to one Mg(1), one Er(2), and one Mo(1) atom. In the eighth O site, O(8) is bonded in a T-shaped geometry to one Mg(1), one Er(1), and one Mo(1) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Er(1), and one Er(2) atom. In the second Cl site, Cl(2) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Er(1), and one Er(2) atom. is represented by the CIF card [CIF]
data_Er2MgMo2(ClO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.476
_cell_length_b   6.472
_cell_length_c   6.924
_cell_angle_alpha   72.823
_cell_angle_beta   72.811
_cell_angle_gamma   65.831
_symmetry_Int_Tables_number   1
_cell_volume   247.790
_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
  Er  Er0  1  0.246  0.234  0.895  1.0
  Er  Er1  1  0.765  0.753  0.105  1.0
  Mg  Mg2  1  0.307  0.692  0.501  1.0
  Mo  Mo3  1  0.640  0.642  0.732  1.0
  Mo  Mo4  1  0.357  0.360  0.268  1.0
  Cl  Cl5  1  0.044  0.957  0.248  1.0
  Cl  Cl6  1  0.041  0.957  0.752  1.0
  O  O7  1  0.539  0.906  0.843  1.0
  O  O8  1  0.514  0.116  0.130  1.0
  O  O9  1  0.094  0.461  0.156  1.0
  O  O10  1  0.526  0.551  0.222  1.0
  O  O11  1  0.247  0.380  0.545  1.0
  O  O12  1  0.884  0.486  0.870  1.0
  O  O13  1  0.620  0.752  0.455  1.0
  O  O14  1  0.448  0.474  0.778  1.0
[/CIF]
.