The material described by Fe3(GeO4)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(7), and one O(8) atom to form FeO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with three equivalent Ge(2)O4 tetrahedra, edges with two equivalent Fe(2)O6 octahedra, and edges with two equivalent Fe(3)O6 octahedra. In the second Fe site, Fe(2) is bonded to one O(1), one O(6), one O(7), one O(8), and two equivalent O(5) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(3)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with two equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles are 20°. In the third Fe site, Fe(3) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(8) atom to form FeO6 octahedra that share  a cornercorner with one Fe(2)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with three equivalent Ge(2)O4 tetrahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles are 20°. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form GeO4 tetrahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with three equivalent Fe(1)O6 octahedra, and  a cornercorner with one Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-63°. In the second Ge site, Ge(2) is bonded to one O(1), one O(3), one O(4), and one O(8) atom to form GeO4 tetrahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(3)O6 octahedra, and  a cornercorner with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-61°. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Ge(1) atom. In the second O site, O(8) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(2), one Fe(3), and one Ge(2) atom. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Ge(2) atom. In the fourth O site, O(2) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(3), and one Ge(1) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Fe(1), one Ge(1), and one Ge(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(3), and one Ge(2) atom. In the seventh O site, O(5) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(3), and two equivalent Fe(2) atoms. In the eighth O site, O(6) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Fe3(GeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.472
_cell_length_b   8.627
_cell_length_c   9.341
_cell_angle_alpha   62.333
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   604.642
_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
  Fe  Fe0  1  0.883  0.657  0.637  1.0
  Fe  Fe1  1  0.359  0.928  0.110  1.0
  Fe  Fe2  1  0.115  0.195  0.127  1.0
  Fe  Fe3  1  0.383  0.343  0.863  1.0
  Fe  Fe4  1  0.117  0.343  0.363  1.0
  Fe  Fe5  1  0.641  0.072  0.890  1.0
  Fe  Fe6  1  0.615  0.805  0.373  1.0
  Fe  Fe7  1  0.141  0.928  0.610  1.0
  Fe  Fe8  1  0.617  0.657  0.137  1.0
  Fe  Fe9  1  0.885  0.805  0.873  1.0
  Fe  Fe10  1  0.385  0.195  0.627  1.0
  Fe  Fe11  1  0.859  0.072  0.390  1.0
  Ge  Ge12  1  0.248  0.629  0.988  1.0
  Ge  Ge13  1  0.748  0.371  0.512  1.0
  Ge  Ge14  1  0.752  0.371  0.012  1.0
  Ge  Ge15  1  0.252  0.629  0.488  1.0
  Ge  Ge16  1  0.480  0.220  0.267  1.0
  Ge  Ge17  1  0.520  0.780  0.733  1.0
  Ge  Ge18  1  0.980  0.780  0.233  1.0
  Ge  Ge19  1  0.020  0.220  0.767  1.0
  O  O20  1  0.622  0.052  0.365  1.0
  O  O21  1  0.651  0.566  0.385  1.0
  O  O22  1  0.849  0.566  0.885  1.0
  O  O23  1  0.878  0.052  0.865  1.0
  O  O24  1  0.109  0.592  0.360  1.0
  O  O25  1  0.627  0.707  0.615  1.0
  O  O26  1  0.903  0.913  0.627  1.0
  O  O27  1  0.097  0.087  0.373  1.0
  O  O28  1  0.119  0.797  0.860  1.0
  O  O29  1  0.349  0.434  0.615  1.0
  O  O30  1  0.881  0.203  0.140  1.0
  O  O31  1  0.609  0.408  0.140  1.0
  O  O32  1  0.373  0.293  0.385  1.0
  O  O33  1  0.873  0.707  0.115  1.0
  O  O34  1  0.369  0.703  0.098  1.0
  O  O35  1  0.131  0.703  0.598  1.0
  O  O36  1  0.403  0.087  0.873  1.0
  O  O37  1  0.631  0.297  0.902  1.0
  O  O38  1  0.381  0.797  0.360  1.0
  O  O39  1  0.378  0.948  0.635  1.0
  O  O40  1  0.140  0.173  0.632  1.0
  O  O41  1  0.640  0.827  0.868  1.0
  O  O42  1  0.869  0.297  0.402  1.0
  O  O43  1  0.860  0.827  0.368  1.0
  O  O44  1  0.122  0.948  0.135  1.0
  O  O45  1  0.151  0.434  0.115  1.0
  O  O46  1  0.619  0.203  0.640  1.0
  O  O47  1  0.891  0.408  0.640  1.0
  O  O48  1  0.127  0.293  0.885  1.0
  O  O49  1  0.360  0.173  0.132  1.0
  O  O50  1  0.597  0.913  0.127  1.0
  O  O51  1  0.391  0.592  0.860  1.0
[/CIF]
.
The material described by Fe3(GeO4)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(7), and one O(8) atom to form FeO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with three equivalent Ge(2)O4 tetrahedra, edges with two equivalent Fe(2)O6 octahedra, and edges with two equivalent Fe(3)O6 octahedra. In the second Fe site, Fe(2) is bonded to one O(1), one O(6), one O(7), one O(8), and two equivalent O(5) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(3)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with two equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles are 20°. In the third Fe site, Fe(3) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(8) atom to form FeO6 octahedra that share  a cornercorner with one Fe(2)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with three equivalent Ge(2)O4 tetrahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles are 20°. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form GeO4 tetrahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with three equivalent Fe(1)O6 octahedra, and  a cornercorner with one Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-63°. In the second Ge site, Ge(2) is bonded to one O(1), one O(3), one O(4), and one O(8) atom to form GeO4 tetrahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(3)O6 octahedra, and  a cornercorner with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-61°. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Ge(1) atom. In the second O site, O(8) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(2), one Fe(3), and one Ge(2) atom. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Ge(2) atom. In the fourth O site, O(2) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(3), and one Ge(1) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Fe(1), one Ge(1), and one Ge(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(3), and one Ge(2) atom. In the seventh O site, O(5) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(3), and two equivalent Fe(2) atoms. In the eighth O site, O(6) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Fe3(GeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.472
_cell_length_b   8.627
_cell_length_c   9.341
_cell_angle_alpha   62.333
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   604.642
_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
  Fe  Fe0  1  0.883  0.657  0.637  1.0
  Fe  Fe1  1  0.359  0.928  0.110  1.0
  Fe  Fe2  1  0.115  0.195  0.127  1.0
  Fe  Fe3  1  0.383  0.343  0.863  1.0
  Fe  Fe4  1  0.117  0.343  0.363  1.0
  Fe  Fe5  1  0.641  0.072  0.890  1.0
  Fe  Fe6  1  0.615  0.805  0.373  1.0
  Fe  Fe7  1  0.141  0.928  0.610  1.0
  Fe  Fe8  1  0.617  0.657  0.137  1.0
  Fe  Fe9  1  0.885  0.805  0.873  1.0
  Fe  Fe10  1  0.385  0.195  0.627  1.0
  Fe  Fe11  1  0.859  0.072  0.390  1.0
  Ge  Ge12  1  0.248  0.629  0.988  1.0
  Ge  Ge13  1  0.748  0.371  0.512  1.0
  Ge  Ge14  1  0.752  0.371  0.012  1.0
  Ge  Ge15  1  0.252  0.629  0.488  1.0
  Ge  Ge16  1  0.480  0.220  0.267  1.0
  Ge  Ge17  1  0.520  0.780  0.733  1.0
  Ge  Ge18  1  0.980  0.780  0.233  1.0
  Ge  Ge19  1  0.020  0.220  0.767  1.0
  O  O20  1  0.622  0.052  0.365  1.0
  O  O21  1  0.651  0.566  0.385  1.0
  O  O22  1  0.849  0.566  0.885  1.0
  O  O23  1  0.878  0.052  0.865  1.0
  O  O24  1  0.109  0.592  0.360  1.0
  O  O25  1  0.627  0.707  0.615  1.0
  O  O26  1  0.903  0.913  0.627  1.0
  O  O27  1  0.097  0.087  0.373  1.0
  O  O28  1  0.119  0.797  0.860  1.0
  O  O29  1  0.349  0.434  0.615  1.0
  O  O30  1  0.881  0.203  0.140  1.0
  O  O31  1  0.609  0.408  0.140  1.0
  O  O32  1  0.373  0.293  0.385  1.0
  O  O33  1  0.873  0.707  0.115  1.0
  O  O34  1  0.369  0.703  0.098  1.0
  O  O35  1  0.131  0.703  0.598  1.0
  O  O36  1  0.403  0.087  0.873  1.0
  O  O37  1  0.631  0.297  0.902  1.0
  O  O38  1  0.381  0.797  0.360  1.0
  O  O39  1  0.378  0.948  0.635  1.0
  O  O40  1  0.140  0.173  0.632  1.0
  O  O41  1  0.640  0.827  0.868  1.0
  O  O42  1  0.869  0.297  0.402  1.0
  O  O43  1  0.860  0.827  0.368  1.0
  O  O44  1  0.122  0.948  0.135  1.0
  O  O45  1  0.151  0.434  0.115  1.0
  O  O46  1  0.619  0.203  0.640  1.0
  O  O47  1  0.891  0.408  0.640  1.0
  O  O48  1  0.127  0.293  0.885  1.0
  O  O49  1  0.360  0.173  0.132  1.0
  O  O50  1  0.597  0.913  0.127  1.0
  O  O51  1  0.391  0.592  0.860  1.0
[/CIF]
.