The structure described by PrMnGeO5 is Esseneite-like structured and crystallizes in the triclinic P-1 space group. Pr(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra and corners with four equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. Ge(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form GeO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with two equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-58°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Pr(1), one Mn(1), and one Mn(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Pr(1), one Mn(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Pr(1), one Mn(2), and one Ge(1) atom. In the fourth O site, O(4) is bonded to two equivalent Pr(1), one Mn(2), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OPr2MnGe trigonal pyramids. In the fifth O site, O(5) is bonded to two equivalent Pr(1), one Mn(1), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OPr2MnGe tetrahedra. is represented by the CIF card [CIF]
data_PrMnGeO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.727
_cell_length_b   5.798
_cell_length_c   7.047
_cell_angle_alpha   106.291
_cell_angle_beta   99.316
_cell_angle_gamma   107.214
_symmetry_Int_Tables_number   1
_cell_volume   206.727
_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
  Pr  Pr0  1  0.350  0.188  0.721  1.0
  Pr  Pr1  1  0.650  0.812  0.279  1.0
  Mn  Mn2  1  0.000  0.500  0.000  1.0
  Mn  Mn3  1  0.000  0.500  0.500  1.0
  Ge  Ge4  1  0.696  0.836  0.766  1.0
  Ge  Ge5  1  0.304  0.164  0.234  1.0
  O  O6  1  0.935  0.586  0.262  1.0
  O  O7  1  0.271  0.852  0.076  1.0
  O  O8  1  0.062  0.169  0.366  1.0
  O  O9  1  0.729  0.148  0.924  1.0
  O  O10  1  0.576  0.241  0.440  1.0
  O  O11  1  0.324  0.369  0.090  1.0
  O  O12  1  0.676  0.631  0.910  1.0
  O  O13  1  0.938  0.831  0.634  1.0
  O  O14  1  0.065  0.414  0.738  1.0
  O  O15  1  0.424  0.759  0.560  1.0
[/CIF]
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The structure described by PrMnGeO5 is Esseneite-like structured and crystallizes in the triclinic P-1 space group. Pr(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra and corners with four equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. Ge(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form GeO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with two equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-58°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Pr(1), one Mn(1), and one Mn(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Pr(1), one Mn(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Pr(1), one Mn(2), and one Ge(1) atom. In the fourth O site, O(4) is bonded to two equivalent Pr(1), one Mn(2), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OPr2MnGe trigonal pyramids. In the fifth O site, O(5) is bonded to two equivalent Pr(1), one Mn(1), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OPr2MnGe tetrahedra. is represented by the CIF card [CIF]
data_PrMnGeO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.727
_cell_length_b   5.798
_cell_length_c   7.047
_cell_angle_alpha   106.291
_cell_angle_beta   99.316
_cell_angle_gamma   107.214
_symmetry_Int_Tables_number   1
_cell_volume   206.727
_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
  Pr  Pr0  1  0.350  0.188  0.721  1.0
  Pr  Pr1  1  0.650  0.812  0.279  1.0
  Mn  Mn2  1  0.000  0.500  0.000  1.0
  Mn  Mn3  1  0.000  0.500  0.500  1.0
  Ge  Ge4  1  0.696  0.836  0.766  1.0
  Ge  Ge5  1  0.304  0.164  0.234  1.0
  O  O6  1  0.935  0.586  0.262  1.0
  O  O7  1  0.271  0.852  0.076  1.0
  O  O8  1  0.062  0.169  0.366  1.0
  O  O9  1  0.729  0.148  0.924  1.0
  O  O10  1  0.576  0.241  0.440  1.0
  O  O11  1  0.324  0.369  0.090  1.0
  O  O12  1  0.676  0.631  0.910  1.0
  O  O13  1  0.938  0.831  0.634  1.0
  O  O14  1  0.065  0.414  0.738  1.0
  O  O15  1  0.424  0.759  0.560  1.0
[/CIF]
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