The material structure described by Er(CO3)2 crystallizes in the monoclinic Cm space group. Er(1) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(6), two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms. There are three inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to two equivalent O(2) atoms. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to two equivalent O(3) atoms. In the third C site, C(3) is bonded in a trigonal planar geometry to one O(1), one O(4), and one O(5) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Er(1) and one C(3) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Er(1) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Er(1) and one C(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one C(3) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Er(1) and one C(3) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one Er(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er(CO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.796
_cell_length_b   7.690
_cell_length_c   8.445
_cell_angle_alpha   62.913
_cell_angle_beta   90.007
_cell_angle_gamma   90.015
_symmetry_Int_Tables_number   1
_cell_volume   277.328
_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
  Er  Er0  1  0.006  0.796  0.405  1.0
  Er  Er1  1  0.006  0.201  0.595  1.0
  C  C2  1  0.007  0.106  0.000  1.0
  C  C3  1  0.007  0.898  0.000  1.0
  C  C4  1  0.502  0.419  0.549  1.0
  C  C5  1  0.502  0.967  0.451  1.0
  O  O6  1  0.504  0.229  0.638  1.0
  O  O7  1  0.504  0.867  0.362  1.0
  O  O8  1  0.007  0.099  0.152  1.0
  O  O9  1  0.007  0.251  0.848  1.0
  O  O10  1  0.007  0.752  0.152  1.0
  O  O11  1  0.007  0.904  0.848  1.0
  O  O12  1  0.264  0.504  0.504  1.0
  O  O13  1  0.264  0.007  0.496  1.0
  O  O14  1  0.743  0.504  0.505  1.0
  O  O15  1  0.743  0.009  0.495  1.0
  O  O16  1  0.907  0.638  0.718  1.0
  O  O17  1  0.907  0.356  0.282  1.0
[/CIF]
.
The material structure described by Er(CO3)2 crystallizes in the monoclinic Cm space group. Er(1) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(6), two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms. There are three inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to two equivalent O(2) atoms. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to two equivalent O(3) atoms. In the third C site, C(3) is bonded in a trigonal planar geometry to one O(1), one O(4), and one O(5) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Er(1) and one C(3) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Er(1) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Er(1) and one C(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one C(3) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Er(1) and one C(3) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one Er(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er(CO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.796
_cell_length_b   7.690
_cell_length_c   8.445
_cell_angle_alpha   62.913
_cell_angle_beta   90.007
_cell_angle_gamma   90.015
_symmetry_Int_Tables_number   1
_cell_volume   277.328
_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
  Er  Er0  1  0.006  0.796  0.405  1.0
  Er  Er1  1  0.006  0.201  0.595  1.0
  C  C2  1  0.007  0.106  0.000  1.0
  C  C3  1  0.007  0.898  0.000  1.0
  C  C4  1  0.502  0.419  0.549  1.0
  C  C5  1  0.502  0.967  0.451  1.0
  O  O6  1  0.504  0.229  0.638  1.0
  O  O7  1  0.504  0.867  0.362  1.0
  O  O8  1  0.007  0.099  0.152  1.0
  O  O9  1  0.007  0.251  0.848  1.0
  O  O10  1  0.007  0.752  0.152  1.0
  O  O11  1  0.007  0.904  0.848  1.0
  O  O12  1  0.264  0.504  0.504  1.0
  O  O13  1  0.264  0.007  0.496  1.0
  O  O14  1  0.743  0.504  0.505  1.0
  O  O15  1  0.743  0.009  0.495  1.0
  O  O16  1  0.907  0.638  0.718  1.0
  O  O17  1  0.907  0.356  0.282  1.0
[/CIF]
.