The material described by Na2AlGe7O16 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(13), one O(15), one O(16), one O(4), one O(5), and one O(7) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(14), one O(15), one O(16), one O(3), one O(6), and one O(8) atom. Al(1) is bonded to one O(15), one O(3), one O(5), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra, and  a cornercorner with one Ge(7)O4 tetrahedra. There are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(12), one O(13), one O(3), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra, and  a cornercorner with one Ge(7)O4 tetrahedra. In the second Ge site, Ge(2) is bonded to one O(11), one O(14), one O(4), and one O(8) atom to form corner-sharing GeO4 tetrahedra. In the third Ge site, Ge(3) is bonded to one O(1), one O(6), one O(7), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(5)O4 tetrahedra, and  a cornercorner with one Ge(6)O4 tetrahedra. In the fourth Ge site, Ge(4) is bonded to one O(10), one O(2), one O(5), and one O(8) atom to form GeO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra,  a cornercorner with one Ge(5)O4 tetrahedra, and  a cornercorner with one Ge(7)O4 tetrahedra. In the fifth Ge site, Ge(5) is bonded to one O(10), one O(16), one O(4), and one O(6) atom to form corner-sharing GeO4 tetrahedra. In the sixth Ge site, Ge(6) is bonded to one O(1), one O(11), one O(13), and one O(16) atom to form corner-sharing GeO4 tetrahedra. In the seventh Ge site, Ge(7) is bonded to one O(12), one O(14), one O(15), and one O(2) atom to form GeO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra, and  a cornercorner with one Ge(4)O4 tetrahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ge(3) and one Ge(6) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Ge(4) and one Ge(7) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Na(2), one Al(1), and one Ge(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Na(1), one Ge(2), and one Ge(5) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one Al(1), and one Ge(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Na(2), one Ge(3), and one Ge(5) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Na(1), one Ge(1), and one Ge(3) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Na(2), one Ge(2), and one Ge(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Al(1) and one Ge(3) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Ge(4) and one Ge(5) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Ge(2) and one Ge(6) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Ge(1) and one Ge(7) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Ge(1), and one Ge(6) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 120 degrees geometry to one Na(2), one Ge(2), and one Ge(7) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Al(1), and one Ge(7) atom. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Ge(5), and one Ge(6) atom. is represented by the CIF card [CIF]
data_Na2AlGe7O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.544
_cell_length_b   7.986
_cell_length_c   8.084
_cell_angle_alpha   114.893
_cell_angle_beta   100.098
_cell_angle_gamma   107.577
_symmetry_Int_Tables_number   1
_cell_volume   394.571
_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  0.127  0.286  0.257  1.0
  Na  Na1  1  0.878  0.718  0.740  1.0
  Al  Al2  1  0.210  0.170  0.853  1.0
  Ge  Ge3  1  0.310  0.799  0.591  1.0
  Ge  Ge4  1  0.688  0.206  0.416  1.0
  Ge  Ge5  1  0.355  0.545  0.800  1.0
  Ge  Ge6  1  0.635  0.442  0.193  1.0
  Ge  Ge7  1  0.787  0.828  0.147  1.0
  Ge  Ge8  1  0.230  0.813  0.191  1.0
  Ge  Ge9  1  0.773  0.183  0.812  1.0
  O  O10  1  0.243  0.645  0.971  1.0
  O  O11  1  0.758  0.358  0.028  1.0
  O  O12  1  0.186  0.916  0.730  1.0
  O  O13  1  0.817  0.087  0.269  1.0
  O  O14  1  0.377  0.309  0.097  1.0
  O  O15  1  0.621  0.690  0.898  1.0
  O  O16  1  0.272  0.564  0.589  1.0
  O  O17  1  0.731  0.438  0.411  1.0
  O  O18  1  0.285  0.289  0.722  1.0
  O  O19  1  0.714  0.711  0.283  1.0
  O  O20  1  0.429  0.060  0.328  1.0
  O  O21  1  0.570  0.940  0.671  1.0
  O  O22  1  0.196  0.695  0.336  1.0
  O  O23  1  0.805  0.305  0.669  1.0
  O  O24  1  0.978  0.138  0.884  1.0
  O  O25  1  0.022  0.863  0.113  1.0
[/CIF]
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The material described by Na2AlGe7O16 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(13), one O(15), one O(16), one O(4), one O(5), and one O(7) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(14), one O(15), one O(16), one O(3), one O(6), and one O(8) atom. Al(1) is bonded to one O(15), one O(3), one O(5), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra, and  a cornercorner with one Ge(7)O4 tetrahedra. There are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(12), one O(13), one O(3), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra, and  a cornercorner with one Ge(7)O4 tetrahedra. In the second Ge site, Ge(2) is bonded to one O(11), one O(14), one O(4), and one O(8) atom to form corner-sharing GeO4 tetrahedra. In the third Ge site, Ge(3) is bonded to one O(1), one O(6), one O(7), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(5)O4 tetrahedra, and  a cornercorner with one Ge(6)O4 tetrahedra. In the fourth Ge site, Ge(4) is bonded to one O(10), one O(2), one O(5), and one O(8) atom to form GeO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra,  a cornercorner with one Ge(5)O4 tetrahedra, and  a cornercorner with one Ge(7)O4 tetrahedra. In the fifth Ge site, Ge(5) is bonded to one O(10), one O(16), one O(4), and one O(6) atom to form corner-sharing GeO4 tetrahedra. In the sixth Ge site, Ge(6) is bonded to one O(1), one O(11), one O(13), and one O(16) atom to form corner-sharing GeO4 tetrahedra. In the seventh Ge site, Ge(7) is bonded to one O(12), one O(14), one O(15), and one O(2) atom to form GeO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra, and  a cornercorner with one Ge(4)O4 tetrahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ge(3) and one Ge(6) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Ge(4) and one Ge(7) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Na(2), one Al(1), and one Ge(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Na(1), one Ge(2), and one Ge(5) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one Al(1), and one Ge(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Na(2), one Ge(3), and one Ge(5) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Na(1), one Ge(1), and one Ge(3) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Na(2), one Ge(2), and one Ge(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Al(1) and one Ge(3) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Ge(4) and one Ge(5) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Ge(2) and one Ge(6) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Ge(1) and one Ge(7) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Ge(1), and one Ge(6) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 120 degrees geometry to one Na(2), one Ge(2), and one Ge(7) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Al(1), and one Ge(7) atom. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Ge(5), and one Ge(6) atom. is represented by the CIF card [CIF]
data_Na2AlGe7O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.544
_cell_length_b   7.986
_cell_length_c   8.084
_cell_angle_alpha   114.893
_cell_angle_beta   100.098
_cell_angle_gamma   107.577
_symmetry_Int_Tables_number   1
_cell_volume   394.571
_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  0.127  0.286  0.257  1.0
  Na  Na1  1  0.878  0.718  0.740  1.0
  Al  Al2  1  0.210  0.170  0.853  1.0
  Ge  Ge3  1  0.310  0.799  0.591  1.0
  Ge  Ge4  1  0.688  0.206  0.416  1.0
  Ge  Ge5  1  0.355  0.545  0.800  1.0
  Ge  Ge6  1  0.635  0.442  0.193  1.0
  Ge  Ge7  1  0.787  0.828  0.147  1.0
  Ge  Ge8  1  0.230  0.813  0.191  1.0
  Ge  Ge9  1  0.773  0.183  0.812  1.0
  O  O10  1  0.243  0.645  0.971  1.0
  O  O11  1  0.758  0.358  0.028  1.0
  O  O12  1  0.186  0.916  0.730  1.0
  O  O13  1  0.817  0.087  0.269  1.0
  O  O14  1  0.377  0.309  0.097  1.0
  O  O15  1  0.621  0.690  0.898  1.0
  O  O16  1  0.272  0.564  0.589  1.0
  O  O17  1  0.731  0.438  0.411  1.0
  O  O18  1  0.285  0.289  0.722  1.0
  O  O19  1  0.714  0.711  0.283  1.0
  O  O20  1  0.429  0.060  0.328  1.0
  O  O21  1  0.570  0.940  0.671  1.0
  O  O22  1  0.196  0.695  0.336  1.0
  O  O23  1  0.805  0.305  0.669  1.0
  O  O24  1  0.978  0.138  0.884  1.0
  O  O25  1  0.022  0.863  0.113  1.0
[/CIF]
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