The material structure described by Er2CaGe4O12 crystallizes in the orthorhombic Cmme space group. Ca(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form CaO6 octahedra that share corners with eight equivalent Ge(1)O4 tetrahedra. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded to two equivalent O(4) and four equivalent O(2) atoms to form ErO6 octahedra that share corners with eight equivalent Ge(1)O4 tetrahedra. In the second Er site, Er(2) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with two equivalent Ca(1)O6 octahedra, corners with two equivalent Er(1)O6 octahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-71°. There are four inequivalent O sites. In the first O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1) and two equivalent Ge(1) atoms. In the second O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Er(1) and two equivalent Ge(1) atoms. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to one Ca(1), one Er(2), and one Ge(1) atom. In the fourth O site, O(2) is bonded in a distorted trigonal planar geometry to one Er(1), one Er(2), and one Ge(1) atom. is represented by the CIF file [CIF]
data_CaEr2(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.074
_cell_length_b   10.074
_cell_length_c   5.080
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.013
_symmetry_Int_Tables_number   1
_cell_volume   515.506
_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
  Ca  Ca0  1  0.500  0.000  0.500  1.0
  Ca  Ca1  1  0.000  0.500  0.500  1.0
  Er  Er2  1  0.500  0.500  0.500  1.0
  Er  Er3  1  0.000  0.000  0.500  1.0
  Er  Er4  1  0.250  0.250  0.500  1.0
  Er  Er5  1  0.750  0.750  0.500  1.0
  Ge  Ge6  1  0.980  0.250  0.998  1.0
  Ge  Ge7  1  0.020  0.750  0.002  1.0
  Ge  Ge8  1  0.480  0.750  0.002  1.0
  Ge  Ge9  1  0.520  0.250  0.998  1.0
  Ge  Ge10  1  0.250  0.520  0.002  1.0
  Ge  Ge11  1  0.750  0.480  0.998  1.0
  Ge  Ge12  1  0.750  0.020  0.998  1.0
  Ge  Ge13  1  0.250  0.980  0.002  1.0
  O  O14  1  0.323  0.069  0.254  1.0
  O  O15  1  0.672  0.559  0.260  1.0
  O  O16  1  0.828  0.941  0.260  1.0
  O  O17  1  0.177  0.431  0.254  1.0
  O  O18  1  0.677  0.931  0.746  1.0
  O  O19  1  0.328  0.441  0.740  1.0
  O  O20  1  0.172  0.059  0.740  1.0
  O  O21  1  0.823  0.569  0.746  1.0
  O  O22  1  0.431  0.177  0.746  1.0
  O  O23  1  0.941  0.828  0.740  1.0
  O  O24  1  0.559  0.672  0.740  1.0
  O  O25  1  0.069  0.323  0.746  1.0
  O  O26  1  0.569  0.823  0.254  1.0
  O  O27  1  0.059  0.172  0.260  1.0
  O  O28  1  0.441  0.328  0.260  1.0
  O  O29  1  0.931  0.677  0.254  1.0
  O  O30  1  0.870  0.370  0.156  1.0
  O  O31  1  0.124  0.876  0.165  1.0
  O  O32  1  0.376  0.624  0.165  1.0
  O  O33  1  0.630  0.130  0.156  1.0
  O  O34  1  0.130  0.630  0.844  1.0
  O  O35  1  0.876  0.124  0.835  1.0
  O  O36  1  0.624  0.376  0.835  1.0
  O  O37  1  0.370  0.870  0.844  1.0
[/CIF]
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The material structure described by Er2CaGe4O12 crystallizes in the orthorhombic Cmme space group. Ca(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form CaO6 octahedra that share corners with eight equivalent Ge(1)O4 tetrahedra. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded to two equivalent O(4) and four equivalent O(2) atoms to form ErO6 octahedra that share corners with eight equivalent Ge(1)O4 tetrahedra. In the second Er site, Er(2) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with two equivalent Ca(1)O6 octahedra, corners with two equivalent Er(1)O6 octahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-71°. There are four inequivalent O sites. In the first O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1) and two equivalent Ge(1) atoms. In the second O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Er(1) and two equivalent Ge(1) atoms. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to one Ca(1), one Er(2), and one Ge(1) atom. In the fourth O site, O(2) is bonded in a distorted trigonal planar geometry to one Er(1), one Er(2), and one Ge(1) atom. is represented by the CIF file [CIF]
data_CaEr2(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.074
_cell_length_b   10.074
_cell_length_c   5.080
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.013
_symmetry_Int_Tables_number   1
_cell_volume   515.506
_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
  Ca  Ca0  1  0.500  0.000  0.500  1.0
  Ca  Ca1  1  0.000  0.500  0.500  1.0
  Er  Er2  1  0.500  0.500  0.500  1.0
  Er  Er3  1  0.000  0.000  0.500  1.0
  Er  Er4  1  0.250  0.250  0.500  1.0
  Er  Er5  1  0.750  0.750  0.500  1.0
  Ge  Ge6  1  0.980  0.250  0.998  1.0
  Ge  Ge7  1  0.020  0.750  0.002  1.0
  Ge  Ge8  1  0.480  0.750  0.002  1.0
  Ge  Ge9  1  0.520  0.250  0.998  1.0
  Ge  Ge10  1  0.250  0.520  0.002  1.0
  Ge  Ge11  1  0.750  0.480  0.998  1.0
  Ge  Ge12  1  0.750  0.020  0.998  1.0
  Ge  Ge13  1  0.250  0.980  0.002  1.0
  O  O14  1  0.323  0.069  0.254  1.0
  O  O15  1  0.672  0.559  0.260  1.0
  O  O16  1  0.828  0.941  0.260  1.0
  O  O17  1  0.177  0.431  0.254  1.0
  O  O18  1  0.677  0.931  0.746  1.0
  O  O19  1  0.328  0.441  0.740  1.0
  O  O20  1  0.172  0.059  0.740  1.0
  O  O21  1  0.823  0.569  0.746  1.0
  O  O22  1  0.431  0.177  0.746  1.0
  O  O23  1  0.941  0.828  0.740  1.0
  O  O24  1  0.559  0.672  0.740  1.0
  O  O25  1  0.069  0.323  0.746  1.0
  O  O26  1  0.569  0.823  0.254  1.0
  O  O27  1  0.059  0.172  0.260  1.0
  O  O28  1  0.441  0.328  0.260  1.0
  O  O29  1  0.931  0.677  0.254  1.0
  O  O30  1  0.870  0.370  0.156  1.0
  O  O31  1  0.124  0.876  0.165  1.0
  O  O32  1  0.376  0.624  0.165  1.0
  O  O33  1  0.630  0.130  0.156  1.0
  O  O34  1  0.130  0.630  0.844  1.0
  O  O35  1  0.876  0.124  0.835  1.0
  O  O36  1  0.624  0.376  0.835  1.0
  O  O37  1  0.370  0.870  0.844  1.0
[/CIF]
.