The crystal structure described by Rb2Na2Al3(GeO4)3 is Chalcostibite-derived structured and crystallizes in the orthorhombic Pmn2_1 space group. Rb(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(5), one O(7), and two equivalent O(4) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(6), two equivalent O(1), and two equivalent O(5) atoms to form distorted NaO5 square pyramids that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Ge(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, corners with four equivalent Ge(2)O4 tetrahedra, and  an edgeedge with one Al(1)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(3), two equivalent O(2), and two equivalent O(7) atoms to form distorted NaO5 square pyramids that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, corners with four equivalent Al(2)O4 tetrahedra, and  an edgeedge with one Ge(1)O4 tetrahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(3), one O(6), and two equivalent O(1) atoms to form AlO4 tetrahedra that share  a cornercorner with one Na(1)O5 square pyramid,  a cornercorner with one Na(2)O5 square pyramid, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, and  an edgeedge with one Na(1)O5 square pyramid. In the second Al site, Al(2) is bonded to one O(2), one O(4), one O(5), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one Na(1)O5 square pyramid, corners with two equivalent Na(2)O5 square pyramids,  a cornercorner with one Ge(1)O4 tetrahedra, and corners with three equivalent Ge(2)O4 tetrahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(3), one O(6), and two equivalent O(7) atoms to form GeO4 tetrahedra that share  a cornercorner with one Na(1)O5 square pyramid,  a cornercorner with one Na(2)O5 square pyramid, corners with two equivalent Al(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and  an edgeedge with one Na(2)O5 square pyramid. In the second Ge site, Ge(2) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form GeO4 tetrahedra that share  a cornercorner with one Na(2)O5 square pyramid, corners with two equivalent Na(1)O5 square pyramids,  a cornercorner with one Al(1)O4 tetrahedra, and corners with three equivalent Al(2)O4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to one Rb(1), one Na(1), one Al(2), and one Ge(2) atom. In the second O site, O(6) is bonded in a trigonal planar geometry to one Na(1), one Al(1), and one Ge(1) atom. In the third O site, O(7) is bonded in a 4-coordinate geometry to one Rb(1), one Na(2), one Al(2), and one Ge(1) atom. In the fourth O site, O(1) is bonded in a 3-coordinate geometry to one Rb(1), one Na(1), one Al(1), and one Ge(2) atom. In the fifth O site, O(2) is bonded in a 3-coordinate geometry to one Rb(1), one Na(2), one Al(2), and one Ge(2) atom. In the sixth O site, O(3) is bonded in a trigonal planar geometry to one Na(2), one Al(1), and one Ge(1) atom. In the seventh O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1), one Al(2), and one Ge(2) atom. is represented by the CIF card [CIF]
data_Rb2Na2Al3(GeO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.388
_cell_length_b   8.501
_cell_length_c   15.829
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   724.942
_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
  Rb  Rb0  1  0.810  0.324  0.741  1.0
  Rb  Rb1  1  0.310  0.676  0.759  1.0
  Rb  Rb2  1  0.310  0.676  0.241  1.0
  Rb  Rb3  1  0.810  0.324  0.259  1.0
  Na  Na4  1  0.796  0.185  0.000  1.0
  Na  Na5  1  0.296  0.815  0.500  1.0
  Na  Na6  1  0.296  0.821  0.000  1.0
  Na  Na7  1  0.796  0.179  0.500  1.0
  Al  Al8  1  0.337  0.395  0.000  1.0
  Al  Al9  1  0.837  0.605  0.500  1.0
  Al  Al10  1  0.822  0.895  0.859  1.0
  Al  Al11  1  0.322  0.105  0.641  1.0
  Al  Al12  1  0.322  0.105  0.359  1.0
  Al  Al13  1  0.822  0.895  0.141  1.0
  Ge  Ge14  1  0.837  0.608  0.000  1.0
  Ge  Ge15  1  0.337  0.392  0.500  1.0
  Ge  Ge16  1  0.822  0.889  0.642  1.0
  Ge  Ge17  1  0.322  0.111  0.858  1.0
  Ge  Ge18  1  0.322  0.111  0.142  1.0
  Ge  Ge19  1  0.822  0.889  0.358  1.0
  O  O20  1  0.933  0.718  0.590  1.0
  O  O21  1  0.433  0.282  0.910  1.0
  O  O22  1  0.433  0.282  0.090  1.0
  O  O23  1  0.933  0.718  0.410  1.0
  O  O24  1  0.512  0.944  0.888  1.0
  O  O25  1  0.012  0.056  0.612  1.0
  O  O26  1  0.012  0.056  0.388  1.0
  O  O27  1  0.512  0.944  0.112  1.0
  O  O28  1  0.510  0.574  0.000  1.0
  O  O29  1  0.010  0.426  0.500  1.0
  O  O30  1  0.841  0.841  0.751  1.0
  O  O31  1  0.341  0.159  0.749  1.0
  O  O32  1  0.341  0.159  0.251  1.0
  O  O33  1  0.841  0.841  0.249  1.0
  O  O34  1  0.509  0.939  0.613  1.0
  O  O35  1  0.009  0.061  0.887  1.0
  O  O36  1  0.009  0.061  0.113  1.0
  O  O37  1  0.509  0.939  0.387  1.0
  O  O38  1  0.011  0.431  0.000  1.0
  O  O39  1  0.511  0.569  0.500  1.0
  O  O40  1  0.932  0.723  0.911  1.0
  O  O41  1  0.432  0.277  0.589  1.0
  O  O42  1  0.432  0.277  0.411  1.0
  O  O43  1  0.932  0.723  0.089  1.0
[/CIF]
.
The crystal structure described by Rb2Na2Al3(GeO4)3 is Chalcostibite-derived structured and crystallizes in the orthorhombic Pmn2_1 space group. Rb(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(5), one O(7), and two equivalent O(4) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(6), two equivalent O(1), and two equivalent O(5) atoms to form distorted NaO5 square pyramids that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Ge(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, corners with four equivalent Ge(2)O4 tetrahedra, and  an edgeedge with one Al(1)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(3), two equivalent O(2), and two equivalent O(7) atoms to form distorted NaO5 square pyramids that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, corners with four equivalent Al(2)O4 tetrahedra, and  an edgeedge with one Ge(1)O4 tetrahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(3), one O(6), and two equivalent O(1) atoms to form AlO4 tetrahedra that share  a cornercorner with one Na(1)O5 square pyramid,  a cornercorner with one Na(2)O5 square pyramid, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, and  an edgeedge with one Na(1)O5 square pyramid. In the second Al site, Al(2) is bonded to one O(2), one O(4), one O(5), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one Na(1)O5 square pyramid, corners with two equivalent Na(2)O5 square pyramids,  a cornercorner with one Ge(1)O4 tetrahedra, and corners with three equivalent Ge(2)O4 tetrahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(3), one O(6), and two equivalent O(7) atoms to form GeO4 tetrahedra that share  a cornercorner with one Na(1)O5 square pyramid,  a cornercorner with one Na(2)O5 square pyramid, corners with two equivalent Al(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and  an edgeedge with one Na(2)O5 square pyramid. In the second Ge site, Ge(2) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form GeO4 tetrahedra that share  a cornercorner with one Na(2)O5 square pyramid, corners with two equivalent Na(1)O5 square pyramids,  a cornercorner with one Al(1)O4 tetrahedra, and corners with three equivalent Al(2)O4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to one Rb(1), one Na(1), one Al(2), and one Ge(2) atom. In the second O site, O(6) is bonded in a trigonal planar geometry to one Na(1), one Al(1), and one Ge(1) atom. In the third O site, O(7) is bonded in a 4-coordinate geometry to one Rb(1), one Na(2), one Al(2), and one Ge(1) atom. In the fourth O site, O(1) is bonded in a 3-coordinate geometry to one Rb(1), one Na(1), one Al(1), and one Ge(2) atom. In the fifth O site, O(2) is bonded in a 3-coordinate geometry to one Rb(1), one Na(2), one Al(2), and one Ge(2) atom. In the sixth O site, O(3) is bonded in a trigonal planar geometry to one Na(2), one Al(1), and one Ge(1) atom. In the seventh O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1), one Al(2), and one Ge(2) atom. is represented by the CIF card [CIF]
data_Rb2Na2Al3(GeO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.388
_cell_length_b   8.501
_cell_length_c   15.829
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   724.942
_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
  Rb  Rb0  1  0.810  0.324  0.741  1.0
  Rb  Rb1  1  0.310  0.676  0.759  1.0
  Rb  Rb2  1  0.310  0.676  0.241  1.0
  Rb  Rb3  1  0.810  0.324  0.259  1.0
  Na  Na4  1  0.796  0.185  0.000  1.0
  Na  Na5  1  0.296  0.815  0.500  1.0
  Na  Na6  1  0.296  0.821  0.000  1.0
  Na  Na7  1  0.796  0.179  0.500  1.0
  Al  Al8  1  0.337  0.395  0.000  1.0
  Al  Al9  1  0.837  0.605  0.500  1.0
  Al  Al10  1  0.822  0.895  0.859  1.0
  Al  Al11  1  0.322  0.105  0.641  1.0
  Al  Al12  1  0.322  0.105  0.359  1.0
  Al  Al13  1  0.822  0.895  0.141  1.0
  Ge  Ge14  1  0.837  0.608  0.000  1.0
  Ge  Ge15  1  0.337  0.392  0.500  1.0
  Ge  Ge16  1  0.822  0.889  0.642  1.0
  Ge  Ge17  1  0.322  0.111  0.858  1.0
  Ge  Ge18  1  0.322  0.111  0.142  1.0
  Ge  Ge19  1  0.822  0.889  0.358  1.0
  O  O20  1  0.933  0.718  0.590  1.0
  O  O21  1  0.433  0.282  0.910  1.0
  O  O22  1  0.433  0.282  0.090  1.0
  O  O23  1  0.933  0.718  0.410  1.0
  O  O24  1  0.512  0.944  0.888  1.0
  O  O25  1  0.012  0.056  0.612  1.0
  O  O26  1  0.012  0.056  0.388  1.0
  O  O27  1  0.512  0.944  0.112  1.0
  O  O28  1  0.510  0.574  0.000  1.0
  O  O29  1  0.010  0.426  0.500  1.0
  O  O30  1  0.841  0.841  0.751  1.0
  O  O31  1  0.341  0.159  0.749  1.0
  O  O32  1  0.341  0.159  0.251  1.0
  O  O33  1  0.841  0.841  0.249  1.0
  O  O34  1  0.509  0.939  0.613  1.0
  O  O35  1  0.009  0.061  0.887  1.0
  O  O36  1  0.009  0.061  0.113  1.0
  O  O37  1  0.509  0.939  0.387  1.0
  O  O38  1  0.011  0.431  0.000  1.0
  O  O39  1  0.511  0.569  0.500  1.0
  O  O40  1  0.932  0.723  0.911  1.0
  O  O41  1  0.432  0.277  0.589  1.0
  O  O42  1  0.432  0.277  0.411  1.0
  O  O43  1  0.932  0.723  0.089  1.0
[/CIF]
.