The compound described by Na2Al2(GeO4)3 crystallizes in the orthorhombic Fdd2 space group. Na(1) is bonded to one O(5), one O(6), two equivalent O(1), and two equivalent O(2) atoms to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Al(1)O4 tetrahedra, corners with two equivalent Ge(1)O4 tetrahedra, edges with two equivalent Na(1)O6 pentagonal pyramids,  an edgeedge with one Al(1)O4 tetrahedra, and  an edgeedge with one Ge(1)O4 tetrahedra. Al(1) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form AlO4 tetrahedra that share corners with two equivalent Na(1)O6 pentagonal pyramids,  a cornercorner with one Ge(2)O4 tetrahedra, corners with three equivalent Ge(1)O4 tetrahedra, and  an edgeedge with one Na(1)O6 pentagonal pyramid. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form GeO4 tetrahedra that share corners with two equivalent Na(1)O6 pentagonal pyramids,  a cornercorner with one Ge(2)O4 tetrahedra, corners with three equivalent Al(1)O4 tetrahedra, and  an edgeedge with one Na(1)O6 pentagonal pyramid. In the second Ge site, Ge(2) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form GeO4 tetrahedra that share corners with two equivalent Al(1)O4 tetrahedra and corners with two equivalent Ge(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(3) is bonded in a bent 150 degrees geometry to one Al(1) and one Ge(2) atom. In the second O site, O(4) is bonded in a bent 150 degrees geometry to one Ge(1) and one Ge(2) atom. In the third O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Ge(1) atom. In the fourth O site, O(6) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Ge(1) atom. In the fifth O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Al(1), and one Ge(1) atom. In the sixth O site, O(2) is bonded in a water-like geometry to two equivalent Na(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Al2(GeO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.275
_cell_length_b   10.032
_cell_length_c   10.007
_cell_angle_alpha   82.973
_cell_angle_beta   48.595
_cell_angle_gamma   48.432
_symmetry_Int_Tables_number   1
_cell_volume   617.614
_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  0.813  0.626  0.124  1.0
  Na  Na1  1  0.436  0.124  0.626  1.0
  Na  Na2  1  0.126  0.814  0.437  1.0
  Na  Na3  1  0.624  0.437  0.814  1.0
  Al  Al4  1  0.562  0.506  0.243  1.0
  Al  Al5  1  0.689  0.243  0.506  1.0
  Al  Al6  1  0.744  0.688  0.561  1.0
  Al  Al7  1  0.007  0.561  0.688  1.0
  Ge  Ge8  1  0.567  0.737  0.002  1.0
  Ge  Ge9  1  0.693  0.002  0.737  1.0
  Ge  Ge10  1  0.248  0.557  0.683  1.0
  Ge  Ge11  1  0.513  0.683  0.557  1.0
  Ge  Ge12  1  0.252  0.248  0.248  1.0
  Ge  Ge13  1  0.002  0.998  0.998  1.0
  O  O14  1  0.498  0.627  0.126  1.0
  O  O15  1  0.749  0.126  0.627  1.0
  O  O16  1  0.124  0.501  0.752  1.0
  O  O17  1  0.623  0.752  0.501  1.0
  O  O18  1  0.253  0.640  0.128  1.0
  O  O19  1  0.979  0.128  0.640  1.0
  O  O20  1  0.122  0.271  0.997  1.0
  O  O21  1  0.610  0.997  0.271  1.0
  O  O22  1  0.024  0.448  0.323  1.0
  O  O23  1  0.048  0.795  0.926  1.0
  O  O24  1  0.205  0.323  0.448  1.0
  O  O25  1  0.230  0.926  0.795  1.0
  O  O26  1  0.324  0.020  0.202  1.0
  O  O27  1  0.802  0.226  0.045  1.0
  O  O28  1  0.455  0.202  0.020  1.0
  O  O29  1  0.927  0.045  0.226  1.0
  O  O30  1  0.661  0.920  0.639  1.0
  O  O31  1  0.471  0.330  0.610  1.0
  O  O32  1  0.780  0.639  0.920  1.0
  O  O33  1  0.589  0.610  0.330  1.0
  O  O34  1  0.640  0.661  0.779  1.0
  O  O35  1  0.330  0.589  0.470  1.0
  O  O36  1  0.920  0.779  0.661  1.0
  O  O37  1  0.611  0.470  0.589  1.0
[/CIF]
.
The compound described by Na2Al2(GeO4)3 crystallizes in the orthorhombic Fdd2 space group. Na(1) is bonded to one O(5), one O(6), two equivalent O(1), and two equivalent O(2) atoms to form distorted NaO6 pentagonal pyramids that share corners with two equivalent Al(1)O4 tetrahedra, corners with two equivalent Ge(1)O4 tetrahedra, edges with two equivalent Na(1)O6 pentagonal pyramids,  an edgeedge with one Al(1)O4 tetrahedra, and  an edgeedge with one Ge(1)O4 tetrahedra. Al(1) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form AlO4 tetrahedra that share corners with two equivalent Na(1)O6 pentagonal pyramids,  a cornercorner with one Ge(2)O4 tetrahedra, corners with three equivalent Ge(1)O4 tetrahedra, and  an edgeedge with one Na(1)O6 pentagonal pyramid. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form GeO4 tetrahedra that share corners with two equivalent Na(1)O6 pentagonal pyramids,  a cornercorner with one Ge(2)O4 tetrahedra, corners with three equivalent Al(1)O4 tetrahedra, and  an edgeedge with one Na(1)O6 pentagonal pyramid. In the second Ge site, Ge(2) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form GeO4 tetrahedra that share corners with two equivalent Al(1)O4 tetrahedra and corners with two equivalent Ge(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(3) is bonded in a bent 150 degrees geometry to one Al(1) and one Ge(2) atom. In the second O site, O(4) is bonded in a bent 150 degrees geometry to one Ge(1) and one Ge(2) atom. In the third O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Ge(1) atom. In the fourth O site, O(6) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Ge(1) atom. In the fifth O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Al(1), and one Ge(1) atom. In the sixth O site, O(2) is bonded in a water-like geometry to two equivalent Na(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Al2(GeO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.275
_cell_length_b   10.032
_cell_length_c   10.007
_cell_angle_alpha   82.973
_cell_angle_beta   48.595
_cell_angle_gamma   48.432
_symmetry_Int_Tables_number   1
_cell_volume   617.614
_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  0.813  0.626  0.124  1.0
  Na  Na1  1  0.436  0.124  0.626  1.0
  Na  Na2  1  0.126  0.814  0.437  1.0
  Na  Na3  1  0.624  0.437  0.814  1.0
  Al  Al4  1  0.562  0.506  0.243  1.0
  Al  Al5  1  0.689  0.243  0.506  1.0
  Al  Al6  1  0.744  0.688  0.561  1.0
  Al  Al7  1  0.007  0.561  0.688  1.0
  Ge  Ge8  1  0.567  0.737  0.002  1.0
  Ge  Ge9  1  0.693  0.002  0.737  1.0
  Ge  Ge10  1  0.248  0.557  0.683  1.0
  Ge  Ge11  1  0.513  0.683  0.557  1.0
  Ge  Ge12  1  0.252  0.248  0.248  1.0
  Ge  Ge13  1  0.002  0.998  0.998  1.0
  O  O14  1  0.498  0.627  0.126  1.0
  O  O15  1  0.749  0.126  0.627  1.0
  O  O16  1  0.124  0.501  0.752  1.0
  O  O17  1  0.623  0.752  0.501  1.0
  O  O18  1  0.253  0.640  0.128  1.0
  O  O19  1  0.979  0.128  0.640  1.0
  O  O20  1  0.122  0.271  0.997  1.0
  O  O21  1  0.610  0.997  0.271  1.0
  O  O22  1  0.024  0.448  0.323  1.0
  O  O23  1  0.048  0.795  0.926  1.0
  O  O24  1  0.205  0.323  0.448  1.0
  O  O25  1  0.230  0.926  0.795  1.0
  O  O26  1  0.324  0.020  0.202  1.0
  O  O27  1  0.802  0.226  0.045  1.0
  O  O28  1  0.455  0.202  0.020  1.0
  O  O29  1  0.927  0.045  0.226  1.0
  O  O30  1  0.661  0.920  0.639  1.0
  O  O31  1  0.471  0.330  0.610  1.0
  O  O32  1  0.780  0.639  0.920  1.0
  O  O33  1  0.589  0.610  0.330  1.0
  O  O34  1  0.640  0.661  0.779  1.0
  O  O35  1  0.330  0.589  0.470  1.0
  O  O36  1  0.920  0.779  0.661  1.0
  O  O37  1  0.611  0.470  0.589  1.0
[/CIF]
.