The material described by CaMnGeO4 is Spinel-derived structured and crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form CaO6 octahedra that share corners with four equivalent Ca(1)O6 octahedra, corners with four equivalent Mn(1)O6 octahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and  an edgeedge with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-62°. Mn(1) 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 four equivalent Ca(1)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, edges with two equivalent Ca(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-62°. Ge(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form GeO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with four equivalent Ca(1)O6 octahedra,  an edgeedge with one Ca(1)O6 octahedra, and edges with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-63°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), two equivalent Mn(1), and one Ge(1) atom to form distorted corner-sharing OCaMn2Ge tetrahedra. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Ca(1), two equivalent Mn(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to two equivalent Ca(1), one Mn(1), and one Ge(1) atom. is represented by the CIF card [CIF]
data_CaMnGeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.152
_cell_length_b   6.606
_cell_length_c   11.444
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   389.463
_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
  Ca  Ca0  1  0.010  0.750  0.723  1.0
  Ca  Ca1  1  0.990  0.250  0.277  1.0
  Ca  Ca2  1  0.510  0.250  0.777  1.0
  Ca  Ca3  1  0.490  0.750  0.223  1.0
  Mn  Mn4  1  0.500  0.500  0.500  1.0
  Mn  Mn5  1  0.000  0.500  0.000  1.0
  Mn  Mn6  1  0.500  0.000  0.500  1.0
  Mn  Mn7  1  0.000  0.000  0.000  1.0
  Ge  Ge8  1  0.574  0.750  0.911  1.0
  Ge  Ge9  1  0.426  0.250  0.089  1.0
  Ge  Ge10  1  0.074  0.250  0.589  1.0
  Ge  Ge11  1  0.926  0.750  0.411  1.0
  O  O12  1  0.232  0.750  0.913  1.0
  O  O13  1  0.768  0.250  0.087  1.0
  O  O14  1  0.732  0.250  0.587  1.0
  O  O15  1  0.268  0.750  0.413  1.0
  O  O16  1  0.765  0.750  0.552  1.0
  O  O17  1  0.235  0.250  0.448  1.0
  O  O18  1  0.265  0.250  0.948  1.0
  O  O19  1  0.735  0.750  0.052  1.0
  O  O20  1  0.726  0.537  0.844  1.0
  O  O21  1  0.274  0.463  0.156  1.0
  O  O22  1  0.226  0.463  0.656  1.0
  O  O23  1  0.274  0.037  0.156  1.0
  O  O24  1  0.774  0.537  0.344  1.0
  O  O25  1  0.726  0.963  0.844  1.0
  O  O26  1  0.774  0.963  0.344  1.0
  O  O27  1  0.226  0.037  0.656  1.0
[/CIF]
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The material described by CaMnGeO4 is Spinel-derived structured and crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form CaO6 octahedra that share corners with four equivalent Ca(1)O6 octahedra, corners with four equivalent Mn(1)O6 octahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and  an edgeedge with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-62°. Mn(1) 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 four equivalent Ca(1)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, edges with two equivalent Ca(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-62°. Ge(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form GeO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with four equivalent Ca(1)O6 octahedra,  an edgeedge with one Ca(1)O6 octahedra, and edges with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-63°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), two equivalent Mn(1), and one Ge(1) atom to form distorted corner-sharing OCaMn2Ge tetrahedra. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Ca(1), two equivalent Mn(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to two equivalent Ca(1), one Mn(1), and one Ge(1) atom. is represented by the CIF card [CIF]
data_CaMnGeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.152
_cell_length_b   6.606
_cell_length_c   11.444
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   389.463
_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
  Ca  Ca0  1  0.010  0.750  0.723  1.0
  Ca  Ca1  1  0.990  0.250  0.277  1.0
  Ca  Ca2  1  0.510  0.250  0.777  1.0
  Ca  Ca3  1  0.490  0.750  0.223  1.0
  Mn  Mn4  1  0.500  0.500  0.500  1.0
  Mn  Mn5  1  0.000  0.500  0.000  1.0
  Mn  Mn6  1  0.500  0.000  0.500  1.0
  Mn  Mn7  1  0.000  0.000  0.000  1.0
  Ge  Ge8  1  0.574  0.750  0.911  1.0
  Ge  Ge9  1  0.426  0.250  0.089  1.0
  Ge  Ge10  1  0.074  0.250  0.589  1.0
  Ge  Ge11  1  0.926  0.750  0.411  1.0
  O  O12  1  0.232  0.750  0.913  1.0
  O  O13  1  0.768  0.250  0.087  1.0
  O  O14  1  0.732  0.250  0.587  1.0
  O  O15  1  0.268  0.750  0.413  1.0
  O  O16  1  0.765  0.750  0.552  1.0
  O  O17  1  0.235  0.250  0.448  1.0
  O  O18  1  0.265  0.250  0.948  1.0
  O  O19  1  0.735  0.750  0.052  1.0
  O  O20  1  0.726  0.537  0.844  1.0
  O  O21  1  0.274  0.463  0.156  1.0
  O  O22  1  0.226  0.463  0.656  1.0
  O  O23  1  0.274  0.037  0.156  1.0
  O  O24  1  0.774  0.537  0.344  1.0
  O  O25  1  0.726  0.963  0.844  1.0
  O  O26  1  0.774  0.963  0.344  1.0
  O  O27  1  0.226  0.037  0.656  1.0
[/CIF]
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