The material structure described by Na2MgGeO4 is beta beryllia-derived structured and crystallizes in the monoclinic Pc space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form NaO4 tetrahedra that share corners with four equivalent Na(2)O4 tetrahedra, corners with four equivalent Mg(1)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form NaO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra, corners with four equivalent Mg(1)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. Mg(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form MgO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra, corners with four equivalent Na(2)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra, corners with four equivalent Na(2)O4 tetrahedra, and corners with four equivalent Mg(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one Mg(1), and one Ge(1) atom to form distorted corner-sharing ONa2MgGe tetrahedra. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Mg(1), and one Ge(1) atom to form distorted corner-sharing ONa2MgGe tetrahedra. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Mg(1), and one Ge(1) atom to form distorted corner-sharing ONa2MgGe trigonal pyramids. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Mg(1), and one Ge(1) atom to form distorted corner-sharing ONa2MgGe tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2MgGeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.692
_cell_length_b   5.423
_cell_length_c   9.031
_cell_angle_alpha   53.006
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   222.666
_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
  Na  Na0  1  0.673  0.633  0.807  1.0
  Na  Na1  1  0.327  0.633  0.307  1.0
  Na  Na2  1  0.819  0.375  0.561  1.0
  Na  Na3  1  0.181  0.375  0.061  1.0
  Mg  Mg4  1  0.186  0.869  0.556  1.0
  Mg  Mg5  1  0.814  0.869  0.056  1.0
  Ge  Ge6  1  0.313  0.113  0.809  1.0
  Ge  Ge7  1  0.687  0.113  0.309  1.0
  O  O8  1  0.205  0.462  0.605  1.0
  O  O9  1  0.795  0.462  0.105  1.0
  O  O10  1  0.616  0.164  0.837  1.0
  O  O11  1  0.384  0.164  0.337  1.0
  O  O12  1  0.291  0.816  0.781  1.0
  O  O13  1  0.709  0.816  0.281  1.0
  O  O14  1  0.150  0.997  0.010  1.0
  O  O15  1  0.850  0.997  0.510  1.0
[/CIF]
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The material structure described by Na2MgGeO4 is beta beryllia-derived structured and crystallizes in the monoclinic Pc space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form NaO4 tetrahedra that share corners with four equivalent Na(2)O4 tetrahedra, corners with four equivalent Mg(1)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form NaO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra, corners with four equivalent Mg(1)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. Mg(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form MgO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra, corners with four equivalent Na(2)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra, corners with four equivalent Na(2)O4 tetrahedra, and corners with four equivalent Mg(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one Mg(1), and one Ge(1) atom to form distorted corner-sharing ONa2MgGe tetrahedra. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Mg(1), and one Ge(1) atom to form distorted corner-sharing ONa2MgGe tetrahedra. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Mg(1), and one Ge(1) atom to form distorted corner-sharing ONa2MgGe trigonal pyramids. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Mg(1), and one Ge(1) atom to form distorted corner-sharing ONa2MgGe tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2MgGeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.692
_cell_length_b   5.423
_cell_length_c   9.031
_cell_angle_alpha   53.006
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   222.666
_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
  Na  Na0  1  0.673  0.633  0.807  1.0
  Na  Na1  1  0.327  0.633  0.307  1.0
  Na  Na2  1  0.819  0.375  0.561  1.0
  Na  Na3  1  0.181  0.375  0.061  1.0
  Mg  Mg4  1  0.186  0.869  0.556  1.0
  Mg  Mg5  1  0.814  0.869  0.056  1.0
  Ge  Ge6  1  0.313  0.113  0.809  1.0
  Ge  Ge7  1  0.687  0.113  0.309  1.0
  O  O8  1  0.205  0.462  0.605  1.0
  O  O9  1  0.795  0.462  0.105  1.0
  O  O10  1  0.616  0.164  0.837  1.0
  O  O11  1  0.384  0.164  0.337  1.0
  O  O12  1  0.291  0.816  0.781  1.0
  O  O13  1  0.709  0.816  0.281  1.0
  O  O14  1  0.150  0.997  0.010  1.0
  O  O15  1  0.850  0.997  0.510  1.0
[/CIF]
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