The crystal structure described by Mn2GeO4 crystallizes in the orthorhombic Imma space group. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(3), one O(4), and four equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. In the third Mn site, Mn(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with two equivalent Mn(3)O6 octahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with three equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles are 17°. Ge(1) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra, corners with four equivalent Mn(3)O6 octahedra, and  a cornercorner with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-60°. There are four inequivalent O sites. In the first O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mn(1), two equivalent Mn(3), and one Ge(1) atom. In the second O site, O(3) is bonded to one Mn(2) and four equivalent Mn(3) atoms to form edge-sharing OMn5 square pyramids. In the third O site, O(4) is bonded in a trigonal planar geometry to one Mn(2) and two equivalent Ge(1) atoms. In the fourth O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(3), and one Ge(1) atom. is represented by the CIF card [CIF]
data_Mn2GeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.178
_cell_length_b   8.178
_cell_length_c   8.178
_cell_angle_alpha   136.071
_cell_angle_beta   114.187
_cell_angle_gamma   82.535
_symmetry_Int_Tables_number   1
_cell_volume   334.186
_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
  Mn  Mn0  1  0.000  0.000  0.000  1.0
  Mn  Mn1  1  0.500  0.500  0.000  1.0
  Mn  Mn2  1  0.782  0.750  0.032  1.0
  Mn  Mn3  1  0.218  0.250  0.968  1.0
  Mn  Mn4  1  0.623  0.623  0.500  1.0
  Mn  Mn5  1  0.377  0.877  0.000  1.0
  Mn  Mn6  1  0.623  0.123  0.000  1.0
  Mn  Mn7  1  0.377  0.377  0.500  1.0
  Ge  Ge8  1  0.265  0.881  0.384  1.0
  Ge  Ge9  1  0.735  0.119  0.616  1.0
  Ge  Ge10  1  0.003  0.619  0.384  1.0
  Ge  Ge11  1  0.997  0.381  0.616  1.0
  O  O12  1  0.628  0.881  0.262  1.0
  O  O13  1  0.372  0.635  0.253  1.0
  O  O14  1  0.882  0.619  0.747  1.0
  O  O15  1  0.118  0.865  0.738  1.0
  O  O16  1  0.372  0.119  0.738  1.0
  O  O17  1  0.628  0.365  0.747  1.0
  O  O18  1  0.118  0.381  0.253  1.0
  O  O19  1  0.882  0.135  0.262  1.0
  O  O20  1  0.762  0.508  0.254  1.0
  O  O21  1  0.238  0.492  0.746  1.0
  O  O22  1  0.246  0.992  0.254  1.0
  O  O23  1  0.754  0.008  0.746  1.0
  O  O24  1  0.536  0.750  0.786  1.0
  O  O25  1  0.464  0.250  0.214  1.0
  O  O26  1  0.970  0.250  0.720  1.0
  O  O27  1  0.030  0.750  0.280  1.0
[/CIF]
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The crystal structure described by Mn2GeO4 crystallizes in the orthorhombic Imma space group. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(3), one O(4), and four equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. In the third Mn site, Mn(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with two equivalent Mn(3)O6 octahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with three equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles are 17°. Ge(1) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra, corners with four equivalent Mn(3)O6 octahedra, and  a cornercorner with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-60°. There are four inequivalent O sites. In the first O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mn(1), two equivalent Mn(3), and one Ge(1) atom. In the second O site, O(3) is bonded to one Mn(2) and four equivalent Mn(3) atoms to form edge-sharing OMn5 square pyramids. In the third O site, O(4) is bonded in a trigonal planar geometry to one Mn(2) and two equivalent Ge(1) atoms. In the fourth O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(3), and one Ge(1) atom. is represented by the CIF card [CIF]
data_Mn2GeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.178
_cell_length_b   8.178
_cell_length_c   8.178
_cell_angle_alpha   136.071
_cell_angle_beta   114.187
_cell_angle_gamma   82.535
_symmetry_Int_Tables_number   1
_cell_volume   334.186
_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
  Mn  Mn0  1  0.000  0.000  0.000  1.0
  Mn  Mn1  1  0.500  0.500  0.000  1.0
  Mn  Mn2  1  0.782  0.750  0.032  1.0
  Mn  Mn3  1  0.218  0.250  0.968  1.0
  Mn  Mn4  1  0.623  0.623  0.500  1.0
  Mn  Mn5  1  0.377  0.877  0.000  1.0
  Mn  Mn6  1  0.623  0.123  0.000  1.0
  Mn  Mn7  1  0.377  0.377  0.500  1.0
  Ge  Ge8  1  0.265  0.881  0.384  1.0
  Ge  Ge9  1  0.735  0.119  0.616  1.0
  Ge  Ge10  1  0.003  0.619  0.384  1.0
  Ge  Ge11  1  0.997  0.381  0.616  1.0
  O  O12  1  0.628  0.881  0.262  1.0
  O  O13  1  0.372  0.635  0.253  1.0
  O  O14  1  0.882  0.619  0.747  1.0
  O  O15  1  0.118  0.865  0.738  1.0
  O  O16  1  0.372  0.119  0.738  1.0
  O  O17  1  0.628  0.365  0.747  1.0
  O  O18  1  0.118  0.381  0.253  1.0
  O  O19  1  0.882  0.135  0.262  1.0
  O  O20  1  0.762  0.508  0.254  1.0
  O  O21  1  0.238  0.492  0.746  1.0
  O  O22  1  0.246  0.992  0.254  1.0
  O  O23  1  0.754  0.008  0.746  1.0
  O  O24  1  0.536  0.750  0.786  1.0
  O  O25  1  0.464  0.250  0.214  1.0
  O  O26  1  0.970  0.250  0.720  1.0
  O  O27  1  0.030  0.750  0.280  1.0
[/CIF]
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