The structure described by SrMnGe2O6 is Esseneite structured and crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), one O(5), one O(6), two equivalent O(1), and two equivalent O(2) atoms. Mn(1) is bonded to one O(5), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with three 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(3), and one O(5) atom to form GeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-60°. In the second Ge site, Ge(2) is bonded to one O(1), one O(2), one O(4), and one O(6) atom 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 36-60°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Ge(1), and one Ge(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Ge(1), and one Ge(2) atom. In the third O site, O(3) is bonded to one Sr(1), two equivalent Mn(1), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OSrMn2Ge tetrahedra. In the fourth O site, O(4) is bonded to one Sr(1), two equivalent Mn(1), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OSrMn2Ge tetrahedra. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Sr(1), one Mn(1), and one Ge(1) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Sr(1), one Mn(1), and one Ge(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrMn(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.610
_cell_length_b   7.102
_cell_length_c   7.104
_cell_angle_alpha   84.303
_cell_angle_beta   79.011
_cell_angle_gamma   78.982
_symmetry_Int_Tables_number   1
_cell_volume   272.139
_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
  Ge  Ge0  1  0.781  0.686  0.878  1.0
  Ge  Ge1  1  0.219  0.314  0.122  1.0
  Ge  Ge2  1  0.719  0.123  0.314  1.0
  Ge  Ge3  1  0.281  0.877  0.686  1.0
  Mn  Mn4  1  0.750  0.594  0.407  1.0
  Mn  Mn5  1  0.250  0.406  0.593  1.0
  O  O6  1  0.982  0.169  0.124  1.0
  O  O7  1  0.018  0.831  0.876  1.0
  O  O8  1  0.518  0.876  0.831  1.0
  O  O9  1  0.482  0.124  0.169  1.0
  O  O10  1  0.861  0.523  0.699  1.0
  O  O11  1  0.139  0.477  0.301  1.0
  O  O12  1  0.639  0.302  0.477  1.0
  O  O13  1  0.361  0.698  0.523  1.0
  O  O14  1  0.680  0.606  0.113  1.0
  O  O15  1  0.320  0.394  0.887  1.0
  O  O16  1  0.820  0.887  0.394  1.0
  O  O17  1  0.180  0.113  0.606  1.0
  Sr  Sr18  1  0.750  0.191  0.809  1.0
  Sr  Sr19  1  0.250  0.809  0.191  1.0
[/CIF]
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The structure described by SrMnGe2O6 is Esseneite structured and crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), one O(5), one O(6), two equivalent O(1), and two equivalent O(2) atoms. Mn(1) is bonded to one O(5), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with three 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(3), and one O(5) atom to form GeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-60°. In the second Ge site, Ge(2) is bonded to one O(1), one O(2), one O(4), and one O(6) atom 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 36-60°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Ge(1), and one Ge(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Ge(1), and one Ge(2) atom. In the third O site, O(3) is bonded to one Sr(1), two equivalent Mn(1), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OSrMn2Ge tetrahedra. In the fourth O site, O(4) is bonded to one Sr(1), two equivalent Mn(1), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OSrMn2Ge tetrahedra. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Sr(1), one Mn(1), and one Ge(1) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Sr(1), one Mn(1), and one Ge(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrMn(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.610
_cell_length_b   7.102
_cell_length_c   7.104
_cell_angle_alpha   84.303
_cell_angle_beta   79.011
_cell_angle_gamma   78.982
_symmetry_Int_Tables_number   1
_cell_volume   272.139
_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
  Ge  Ge0  1  0.781  0.686  0.878  1.0
  Ge  Ge1  1  0.219  0.314  0.122  1.0
  Ge  Ge2  1  0.719  0.123  0.314  1.0
  Ge  Ge3  1  0.281  0.877  0.686  1.0
  Mn  Mn4  1  0.750  0.594  0.407  1.0
  Mn  Mn5  1  0.250  0.406  0.593  1.0
  O  O6  1  0.982  0.169  0.124  1.0
  O  O7  1  0.018  0.831  0.876  1.0
  O  O8  1  0.518  0.876  0.831  1.0
  O  O9  1  0.482  0.124  0.169  1.0
  O  O10  1  0.861  0.523  0.699  1.0
  O  O11  1  0.139  0.477  0.301  1.0
  O  O12  1  0.639  0.302  0.477  1.0
  O  O13  1  0.361  0.698  0.523  1.0
  O  O14  1  0.680  0.606  0.113  1.0
  O  O15  1  0.320  0.394  0.887  1.0
  O  O16  1  0.820  0.887  0.394  1.0
  O  O17  1  0.180  0.113  0.606  1.0
  Sr  Sr18  1  0.750  0.191  0.809  1.0
  Sr  Sr19  1  0.250  0.809  0.191  1.0
[/CIF]
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