The compound described by MgMn2(GeO3)4 crystallizes in the monoclinic C2 space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(4), and two equivalent O(6) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Ge(2)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, and edges with two equivalent Mn(2)O6 octahedra. In the second Mn site, Mn(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Ge(1)O4 tetrahedra, corners with four equivalent Ge(2)O4 tetrahedra, and edges with two equivalent Mn(1)O6 octahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form GeO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-63°. In the second Ge site, Ge(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-63°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mg(1), one Ge(1), and one Ge(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(2) and one Ge(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mn(1), and one Ge(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one Ge(1) atom. In the sixth O site, O(6) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OMgMn2Ge tetrahedra. is represented by the CIF card [CIF]
data_MgMn2(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.703
_cell_length_b   6.651
_cell_length_c   6.651
_cell_angle_alpha   82.418
_cell_angle_beta   75.964
_cell_angle_gamma   75.965
_symmetry_Int_Tables_number   1
_cell_volume   236.722
_cell_formula_units_Z   1
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
  Mg  Mg0  1  0.250  0.723  0.277  1.0
  Mn  Mn1  1  0.750  0.914  0.086  1.0
  Mn  Mn2  1  0.250  0.091  0.909  1.0
  Ge  Ge3  1  0.739  0.386  0.204  1.0
  Ge  Ge4  1  0.761  0.796  0.614  1.0
  Ge  Ge5  1  0.273  0.609  0.792  1.0
  Ge  Ge6  1  0.227  0.208  0.391  1.0
  O  O7  1  0.418  0.395  0.337  1.0
  O  O8  1  0.083  0.663  0.604  1.0
  O  O9  1  0.567  0.620  0.634  1.0
  O  O10  1  0.933  0.366  0.380  1.0
  O  O11  1  0.245  0.069  0.628  1.0
  O  O12  1  0.254  0.373  0.931  1.0
  O  O13  1  0.846  0.886  0.352  1.0
  O  O14  1  0.654  0.648  0.114  1.0
  O  O15  1  0.841  0.187  0.034  1.0
  O  O16  1  0.659  0.966  0.813  1.0
  O  O17  1  0.169  0.799  0.980  1.0
  O  O18  1  0.331  0.020  0.201  1.0
[/CIF]
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The compound described by MgMn2(GeO3)4 crystallizes in the monoclinic C2 space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(4), and two equivalent O(6) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Ge(2)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, and edges with two equivalent Mn(2)O6 octahedra. In the second Mn site, Mn(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Ge(1)O4 tetrahedra, corners with four equivalent Ge(2)O4 tetrahedra, and edges with two equivalent Mn(1)O6 octahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form GeO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-63°. In the second Ge site, Ge(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-63°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mg(1), one Ge(1), and one Ge(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(2) and one Ge(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mn(1), and one Ge(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one Ge(1) atom. In the sixth O site, O(6) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OMgMn2Ge tetrahedra. is represented by the CIF card [CIF]
data_MgMn2(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.703
_cell_length_b   6.651
_cell_length_c   6.651
_cell_angle_alpha   82.418
_cell_angle_beta   75.964
_cell_angle_gamma   75.965
_symmetry_Int_Tables_number   1
_cell_volume   236.722
_cell_formula_units_Z   1
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
  Mg  Mg0  1  0.250  0.723  0.277  1.0
  Mn  Mn1  1  0.750  0.914  0.086  1.0
  Mn  Mn2  1  0.250  0.091  0.909  1.0
  Ge  Ge3  1  0.739  0.386  0.204  1.0
  Ge  Ge4  1  0.761  0.796  0.614  1.0
  Ge  Ge5  1  0.273  0.609  0.792  1.0
  Ge  Ge6  1  0.227  0.208  0.391  1.0
  O  O7  1  0.418  0.395  0.337  1.0
  O  O8  1  0.083  0.663  0.604  1.0
  O  O9  1  0.567  0.620  0.634  1.0
  O  O10  1  0.933  0.366  0.380  1.0
  O  O11  1  0.245  0.069  0.628  1.0
  O  O12  1  0.254  0.373  0.931  1.0
  O  O13  1  0.846  0.886  0.352  1.0
  O  O14  1  0.654  0.648  0.114  1.0
  O  O15  1  0.841  0.187  0.034  1.0
  O  O16  1  0.659  0.966  0.813  1.0
  O  O17  1  0.169  0.799  0.980  1.0
  O  O18  1  0.331  0.020  0.201  1.0
[/CIF]
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