The structure described by NaMn(GeO3)2 is Esseneite structured and crystallizes in the monoclinic C2/c space group. Na(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Mn(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra and edges with two equivalent Mn(1)O6 octahedra. Ge(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form GeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-62°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), two equivalent Mn(1), and one Ge(1) atom to form a mixture of distorted edge and corner-sharing ONaMn2Ge tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Na(1) and two equivalent Ge(1) atoms. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Na(1), one Mn(1), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaMn(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.688
_cell_length_b   6.691
_cell_length_c   6.691
_cell_angle_alpha   83.008
_cell_angle_beta   78.595
_cell_angle_gamma   78.595
_symmetry_Int_Tables_number   1
_cell_volume   243.765
_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
  Na  Na0  1  0.750  0.801  0.199  1.0
  Na  Na1  1  0.250  0.199  0.801  1.0
  Mn  Mn2  1  0.750  0.410  0.590  1.0
  Mn  Mn3  1  0.250  0.590  0.410  1.0
  Ge  Ge4  1  0.741  0.301  0.117  1.0
  Ge  Ge5  1  0.759  0.883  0.699  1.0
  Ge  Ge6  1  0.259  0.699  0.883  1.0
  Ge  Ge7  1  0.241  0.117  0.301  1.0
  O  O8  1  0.651  0.471  0.312  1.0
  O  O9  1  0.849  0.688  0.529  1.0
  O  O10  1  0.349  0.529  0.688  1.0
  O  O11  1  0.151  0.312  0.471  1.0
  O  O12  1  0.517  0.146  0.125  1.0
  O  O13  1  0.983  0.875  0.854  1.0
  O  O14  1  0.483  0.854  0.875  1.0
  O  O15  1  0.017  0.125  0.146  1.0
  O  O16  1  0.690  0.133  0.589  1.0
  O  O17  1  0.810  0.411  0.867  1.0
  O  O18  1  0.310  0.867  0.411  1.0
  O  O19  1  0.190  0.589  0.133  1.0
[/CIF]
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The structure described by NaMn(GeO3)2 is Esseneite structured and crystallizes in the monoclinic C2/c space group. Na(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Mn(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra and edges with two equivalent Mn(1)O6 octahedra. Ge(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form GeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-62°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), two equivalent Mn(1), and one Ge(1) atom to form a mixture of distorted edge and corner-sharing ONaMn2Ge tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Na(1) and two equivalent Ge(1) atoms. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Na(1), one Mn(1), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaMn(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.688
_cell_length_b   6.691
_cell_length_c   6.691
_cell_angle_alpha   83.008
_cell_angle_beta   78.595
_cell_angle_gamma   78.595
_symmetry_Int_Tables_number   1
_cell_volume   243.765
_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
  Na  Na0  1  0.750  0.801  0.199  1.0
  Na  Na1  1  0.250  0.199  0.801  1.0
  Mn  Mn2  1  0.750  0.410  0.590  1.0
  Mn  Mn3  1  0.250  0.590  0.410  1.0
  Ge  Ge4  1  0.741  0.301  0.117  1.0
  Ge  Ge5  1  0.759  0.883  0.699  1.0
  Ge  Ge6  1  0.259  0.699  0.883  1.0
  Ge  Ge7  1  0.241  0.117  0.301  1.0
  O  O8  1  0.651  0.471  0.312  1.0
  O  O9  1  0.849  0.688  0.529  1.0
  O  O10  1  0.349  0.529  0.688  1.0
  O  O11  1  0.151  0.312  0.471  1.0
  O  O12  1  0.517  0.146  0.125  1.0
  O  O13  1  0.983  0.875  0.854  1.0
  O  O14  1  0.483  0.854  0.875  1.0
  O  O15  1  0.017  0.125  0.146  1.0
  O  O16  1  0.690  0.133  0.589  1.0
  O  O17  1  0.810  0.411  0.867  1.0
  O  O18  1  0.310  0.867  0.411  1.0
  O  O19  1  0.190  0.589  0.133  1.0
[/CIF]
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