The structure described by Er2GeO5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 8-coordinate geometry to one O(5), two equivalent O(1), two equivalent O(3), and three equivalent O(2) atoms. In the second Er site, Er(2) is bonded in a 7-coordinate geometry to one O(3), three equivalent O(4), and three equivalent O(5) atoms. Ge(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one Ge(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to three equivalent Er(1) and one Ge(1) atom. In the third O site, O(3) is bonded to one Er(2), two equivalent Er(1), and one Ge(1) atom to form distorted OEr3Ge tetrahedra that share  a cornercorner with one O(5)Er4 tetrahedra, corners with two equivalent O(3)Er3Ge tetrahedra, corners with two equivalent O(4)Er3Ge trigonal pyramids, edges with two equivalent O(5)Er4 tetrahedra, and  an edgeedge with one O(4)Er3Ge trigonal pyramid. In the fourth O site, O(4) is bonded to three equivalent Er(2) and one Ge(1) atom to form distorted OEr3Ge trigonal pyramids that share corners with two equivalent O(3)Er3Ge tetrahedra, corners with five equivalent O(5)Er4 tetrahedra, corners with four equivalent O(4)Er3Ge trigonal pyramids,  an edgeedge with one O(3)Er3Ge tetrahedra, edges with two equivalent O(5)Er4 tetrahedra, and  an edgeedge with one O(4)Er3Ge trigonal pyramid. In the fifth O site, O(5) is bonded to one Er(1) and three equivalent Er(2) atoms to form OEr4 tetrahedra that share  a cornercorner with one O(3)Er3Ge tetrahedra, corners with four equivalent O(5)Er4 tetrahedra, corners with five equivalent O(4)Er3Ge trigonal pyramids,  an edgeedge with one O(5)Er4 tetrahedra, edges with two equivalent O(3)Er3Ge tetrahedra, and edges with two equivalent O(4)Er3Ge trigonal pyramids. is represented by the CIF card [CIF]
data_Er2GeO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.004
_cell_length_b   6.734
_cell_length_c   9.237
_cell_angle_alpha   75.491
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   421.790
_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  0.364  0.458  0.864  1.0
  Er  Er1  1  0.136  0.958  0.864  1.0
  Er  Er2  1  0.372  0.271  0.528  1.0
  Er  Er3  1  0.872  0.229  0.472  1.0
  Er  Er4  1  0.128  0.771  0.528  1.0
  Er  Er5  1  0.628  0.729  0.472  1.0
  Er  Er6  1  0.864  0.042  0.136  1.0
  Er  Er7  1  0.636  0.542  0.136  1.0
  Ge  Ge8  1  0.907  0.474  0.802  1.0
  Ge  Ge9  1  0.593  0.974  0.802  1.0
  Ge  Ge10  1  0.407  0.026  0.198  1.0
  Ge  Ge11  1  0.093  0.526  0.198  1.0
  O  O12  1  0.802  0.010  0.892  1.0
  O  O13  1  0.065  0.278  0.893  1.0
  O  O14  1  0.413  0.174  0.783  1.0
  O  O15  1  0.698  0.510  0.892  1.0
  O  O16  1  0.637  0.009  0.605  1.0
  O  O17  1  0.115  0.069  0.610  1.0
  O  O18  1  0.435  0.778  0.893  1.0
  O  O19  1  0.087  0.674  0.783  1.0
  O  O20  1  0.863  0.509  0.605  1.0
  O  O21  1  0.385  0.569  0.610  1.0
  O  O22  1  0.615  0.431  0.390  1.0
  O  O23  1  0.137  0.491  0.395  1.0
  O  O24  1  0.913  0.326  0.217  1.0
  O  O25  1  0.565  0.222  0.107  1.0
  O  O26  1  0.885  0.931  0.390  1.0
  O  O27  1  0.363  0.991  0.395  1.0
  O  O28  1  0.302  0.490  0.108  1.0
  O  O29  1  0.587  0.826  0.217  1.0
  O  O30  1  0.935  0.722  0.107  1.0
  O  O31  1  0.198  0.990  0.108  1.0
[/CIF]
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The structure described by Er2GeO5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 8-coordinate geometry to one O(5), two equivalent O(1), two equivalent O(3), and three equivalent O(2) atoms. In the second Er site, Er(2) is bonded in a 7-coordinate geometry to one O(3), three equivalent O(4), and three equivalent O(5) atoms. Ge(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one Ge(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to three equivalent Er(1) and one Ge(1) atom. In the third O site, O(3) is bonded to one Er(2), two equivalent Er(1), and one Ge(1) atom to form distorted OEr3Ge tetrahedra that share  a cornercorner with one O(5)Er4 tetrahedra, corners with two equivalent O(3)Er3Ge tetrahedra, corners with two equivalent O(4)Er3Ge trigonal pyramids, edges with two equivalent O(5)Er4 tetrahedra, and  an edgeedge with one O(4)Er3Ge trigonal pyramid. In the fourth O site, O(4) is bonded to three equivalent Er(2) and one Ge(1) atom to form distorted OEr3Ge trigonal pyramids that share corners with two equivalent O(3)Er3Ge tetrahedra, corners with five equivalent O(5)Er4 tetrahedra, corners with four equivalent O(4)Er3Ge trigonal pyramids,  an edgeedge with one O(3)Er3Ge tetrahedra, edges with two equivalent O(5)Er4 tetrahedra, and  an edgeedge with one O(4)Er3Ge trigonal pyramid. In the fifth O site, O(5) is bonded to one Er(1) and three equivalent Er(2) atoms to form OEr4 tetrahedra that share  a cornercorner with one O(3)Er3Ge tetrahedra, corners with four equivalent O(5)Er4 tetrahedra, corners with five equivalent O(4)Er3Ge trigonal pyramids,  an edgeedge with one O(5)Er4 tetrahedra, edges with two equivalent O(3)Er3Ge tetrahedra, and edges with two equivalent O(4)Er3Ge trigonal pyramids. is represented by the CIF card [CIF]
data_Er2GeO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.004
_cell_length_b   6.734
_cell_length_c   9.237
_cell_angle_alpha   75.491
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   421.790
_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  0.364  0.458  0.864  1.0
  Er  Er1  1  0.136  0.958  0.864  1.0
  Er  Er2  1  0.372  0.271  0.528  1.0
  Er  Er3  1  0.872  0.229  0.472  1.0
  Er  Er4  1  0.128  0.771  0.528  1.0
  Er  Er5  1  0.628  0.729  0.472  1.0
  Er  Er6  1  0.864  0.042  0.136  1.0
  Er  Er7  1  0.636  0.542  0.136  1.0
  Ge  Ge8  1  0.907  0.474  0.802  1.0
  Ge  Ge9  1  0.593  0.974  0.802  1.0
  Ge  Ge10  1  0.407  0.026  0.198  1.0
  Ge  Ge11  1  0.093  0.526  0.198  1.0
  O  O12  1  0.802  0.010  0.892  1.0
  O  O13  1  0.065  0.278  0.893  1.0
  O  O14  1  0.413  0.174  0.783  1.0
  O  O15  1  0.698  0.510  0.892  1.0
  O  O16  1  0.637  0.009  0.605  1.0
  O  O17  1  0.115  0.069  0.610  1.0
  O  O18  1  0.435  0.778  0.893  1.0
  O  O19  1  0.087  0.674  0.783  1.0
  O  O20  1  0.863  0.509  0.605  1.0
  O  O21  1  0.385  0.569  0.610  1.0
  O  O22  1  0.615  0.431  0.390  1.0
  O  O23  1  0.137  0.491  0.395  1.0
  O  O24  1  0.913  0.326  0.217  1.0
  O  O25  1  0.565  0.222  0.107  1.0
  O  O26  1  0.885  0.931  0.390  1.0
  O  O27  1  0.363  0.991  0.395  1.0
  O  O28  1  0.302  0.490  0.108  1.0
  O  O29  1  0.587  0.826  0.217  1.0
  O  O30  1  0.935  0.722  0.107  1.0
  O  O31  1  0.198  0.990  0.108  1.0
[/CIF]
.