The structure described by Na2MgGe2(SbO5)2 crystallizes in the triclinic P1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(5), one O(6), one O(8), and one O(9) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(3), one O(5), one O(7), and one O(9) atom. Mg(1) is bonded to one O(1), one O(10), one O(4), one O(5), and one O(8) atom to form distorted MgO5 trigonal bipyramids that share corners with two equivalent Sb(2)O6 octahedra, corners with two equivalent Ge(2)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, and  an edgeedge with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-53°. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(10), one O(3), one O(4), and one O(9) atom to form GeO4 tetrahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 41-63°. In the second Ge site, Ge(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form GeO4 tetrahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra, and corners with two equivalent Mg(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 35-66°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(9) atom to form SbO6 octahedra that share corners with two equivalent Sb(2)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 45°. In the second Sb site, Sb(2) is bonded to one O(1), one O(10), one O(2), one O(4), one O(6), and one O(8) atom to form distorted SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 45°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(1), one Mg(1), one Sb(1), and one Sb(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Na(2), one Sb(1), and one Sb(2) atom. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Ge(1), and one Sb(1) atom to form distorted ONa2GeSb trigonal pyramids that share corners with two equivalent O(10)NaMgGeSb tetrahedra,  a cornercorner with one O(5)Na2MgGeSb trigonal bipyramid, and  an edgeedge with one O(5)Na2MgGeSb trigonal bipyramid. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one Ge(1), and one Sb(2) atom. In the fifth O site, O(5) is bonded to one Na(1), one Na(2), one Mg(1), one Ge(2), and one Sb(1) atom to form distorted ONa2MgGeSb trigonal bipyramids that share corners with two equivalent O(10)NaMgGeSb tetrahedra,  a cornercorner with one O(3)Na2GeSb trigonal pyramid, and  an edgeedge with one O(3)Na2GeSb trigonal pyramid. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Na(1), one Ge(2), and one Sb(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(2), one Ge(2), and one Sb(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Na(1), one Mg(1), one Ge(2), and one Sb(2) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(2), one Ge(1), and one Sb(1) atom. In the tenth O site, O(10) is bonded to one Na(2), one Mg(1), one Ge(1), and one Sb(2) atom to form distorted ONaMgGeSb tetrahedra that share corners with two equivalent O(5)Na2MgGeSb trigonal bipyramids and corners with two equivalent O(3)Na2GeSb trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2MgGe2(SbO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.553
_cell_length_b   6.046
_cell_length_c   7.886
_cell_angle_alpha   108.662
_cell_angle_beta   102.712
_cell_angle_gamma   105.897
_symmetry_Int_Tables_number   1
_cell_volume   227.057
_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
  Na  Na0  1  0.362  0.748  0.690  1.0
  Na  Na1  1  0.674  0.339  0.314  1.0
  Mg  Mg2  1  0.272  0.429  0.901  1.0
  Ge  Ge3  1  0.327  0.689  0.275  1.0
  Ge  Ge4  1  0.667  0.299  0.727  1.0
  Sb  Sb5  1  0.014  0.011  0.490  1.0
  Sb  Sb6  1  0.982  0.990  0.007  1.0
  O  O7  1  0.166  0.047  0.750  1.0
  O  O8  1  0.887  0.056  0.257  1.0
  O  O9  1  0.071  0.681  0.380  1.0
  O  O10  1  0.278  0.773  0.080  1.0
  O  O11  1  0.962  0.358  0.652  1.0
  O  O12  1  0.723  0.148  0.884  1.0
  O  O13  1  0.401  0.168  0.499  1.0
  O  O14  1  0.605  0.568  0.849  1.0
  O  O15  1  0.640  0.794  0.460  1.0
  O  O16  1  0.291  0.365  0.142  1.0
[/CIF]
.
The structure described by Na2MgGe2(SbO5)2 crystallizes in the triclinic P1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(5), one O(6), one O(8), and one O(9) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(3), one O(5), one O(7), and one O(9) atom. Mg(1) is bonded to one O(1), one O(10), one O(4), one O(5), and one O(8) atom to form distorted MgO5 trigonal bipyramids that share corners with two equivalent Sb(2)O6 octahedra, corners with two equivalent Ge(2)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, and  an edgeedge with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-53°. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(10), one O(3), one O(4), and one O(9) atom to form GeO4 tetrahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 41-63°. In the second Ge site, Ge(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form GeO4 tetrahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra, and corners with two equivalent Mg(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 35-66°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(9) atom to form SbO6 octahedra that share corners with two equivalent Sb(2)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 45°. In the second Sb site, Sb(2) is bonded to one O(1), one O(10), one O(2), one O(4), one O(6), and one O(8) atom to form distorted SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 45°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(1), one Mg(1), one Sb(1), and one Sb(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Na(2), one Sb(1), and one Sb(2) atom. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Ge(1), and one Sb(1) atom to form distorted ONa2GeSb trigonal pyramids that share corners with two equivalent O(10)NaMgGeSb tetrahedra,  a cornercorner with one O(5)Na2MgGeSb trigonal bipyramid, and  an edgeedge with one O(5)Na2MgGeSb trigonal bipyramid. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one Ge(1), and one Sb(2) atom. In the fifth O site, O(5) is bonded to one Na(1), one Na(2), one Mg(1), one Ge(2), and one Sb(1) atom to form distorted ONa2MgGeSb trigonal bipyramids that share corners with two equivalent O(10)NaMgGeSb tetrahedra,  a cornercorner with one O(3)Na2GeSb trigonal pyramid, and  an edgeedge with one O(3)Na2GeSb trigonal pyramid. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Na(1), one Ge(2), and one Sb(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(2), one Ge(2), and one Sb(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Na(1), one Mg(1), one Ge(2), and one Sb(2) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(2), one Ge(1), and one Sb(1) atom. In the tenth O site, O(10) is bonded to one Na(2), one Mg(1), one Ge(1), and one Sb(2) atom to form distorted ONaMgGeSb tetrahedra that share corners with two equivalent O(5)Na2MgGeSb trigonal bipyramids and corners with two equivalent O(3)Na2GeSb trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2MgGe2(SbO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.553
_cell_length_b   6.046
_cell_length_c   7.886
_cell_angle_alpha   108.662
_cell_angle_beta   102.712
_cell_angle_gamma   105.897
_symmetry_Int_Tables_number   1
_cell_volume   227.057
_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
  Na  Na0  1  0.362  0.748  0.690  1.0
  Na  Na1  1  0.674  0.339  0.314  1.0
  Mg  Mg2  1  0.272  0.429  0.901  1.0
  Ge  Ge3  1  0.327  0.689  0.275  1.0
  Ge  Ge4  1  0.667  0.299  0.727  1.0
  Sb  Sb5  1  0.014  0.011  0.490  1.0
  Sb  Sb6  1  0.982  0.990  0.007  1.0
  O  O7  1  0.166  0.047  0.750  1.0
  O  O8  1  0.887  0.056  0.257  1.0
  O  O9  1  0.071  0.681  0.380  1.0
  O  O10  1  0.278  0.773  0.080  1.0
  O  O11  1  0.962  0.358  0.652  1.0
  O  O12  1  0.723  0.148  0.884  1.0
  O  O13  1  0.401  0.168  0.499  1.0
  O  O14  1  0.605  0.568  0.849  1.0
  O  O15  1  0.640  0.794  0.460  1.0
  O  O16  1  0.291  0.365  0.142  1.0
[/CIF]
.