The compound described by Al2Ge(O2F)2 crystallizes in the orthorhombic Pnma space group. Al(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent F(1) atoms to form AlO4F2 octahedra that share corners with two equivalent Al(1)O4F2 octahedra, corners with four equivalent Ge(1)O4 tetrahedra, and edges with two equivalent Al(1)O4F2 octahedra. The corner-sharing octahedral tilt angles are 33°. Ge(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with eight equivalent Al(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 51-55°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Al(1) and one Ge(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Al(1) and one Ge(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Al(1) and one Ge(1) atom. F(1) is bonded in a bent 150 degrees geometry to two equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_Al2Ge(O2F)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.818
_cell_length_b   8.632
_cell_length_c   9.087
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   377.918
_cell_formula_units_Z   4
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
  Al  Al0  1  0.594  0.082  0.869  1.0
  Al  Al1  1  0.094  0.918  0.631  1.0
  Al  Al2  1  0.406  0.582  0.131  1.0
  Al  Al3  1  0.406  0.918  0.131  1.0
  Al  Al4  1  0.906  0.418  0.369  1.0
  Al  Al5  1  0.094  0.582  0.631  1.0
  Al  Al6  1  0.906  0.082  0.369  1.0
  Al  Al7  1  0.594  0.418  0.869  1.0
  Ge  Ge8  1  0.399  0.250  0.560  1.0
  Ge  Ge9  1  0.601  0.750  0.440  1.0
  Ge  Ge10  1  0.899  0.750  0.940  1.0
  Ge  Ge11  1  0.101  0.250  0.060  1.0
  O  O12  1  0.204  0.084  0.509  1.0
  O  O13  1  0.459  0.250  0.754  1.0
  O  O14  1  0.796  0.916  0.491  1.0
  O  O15  1  0.780  0.250  0.965  1.0
  O  O16  1  0.541  0.750  0.246  1.0
  O  O17  1  0.204  0.416  0.509  1.0
  O  O18  1  0.296  0.084  0.009  1.0
  O  O19  1  0.959  0.750  0.746  1.0
  O  O20  1  0.296  0.416  0.009  1.0
  O  O21  1  0.220  0.750  0.035  1.0
  O  O22  1  0.704  0.916  0.991  1.0
  O  O23  1  0.280  0.750  0.535  1.0
  O  O24  1  0.720  0.250  0.465  1.0
  O  O25  1  0.704  0.584  0.991  1.0
  O  O26  1  0.796  0.584  0.491  1.0
  O  O27  1  0.041  0.250  0.254  1.0
  F  F28  1  0.104  0.947  0.251  1.0
  F  F29  1  0.104  0.553  0.251  1.0
  F  F30  1  0.396  0.553  0.751  1.0
  F  F31  1  0.604  0.053  0.249  1.0
  F  F32  1  0.896  0.053  0.749  1.0
  F  F33  1  0.396  0.947  0.751  1.0
  F  F34  1  0.604  0.447  0.249  1.0
  F  F35  1  0.896  0.447  0.749  1.0
[/CIF]
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The compound described by Al2Ge(O2F)2 crystallizes in the orthorhombic Pnma space group. Al(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent F(1) atoms to form AlO4F2 octahedra that share corners with two equivalent Al(1)O4F2 octahedra, corners with four equivalent Ge(1)O4 tetrahedra, and edges with two equivalent Al(1)O4F2 octahedra. The corner-sharing octahedral tilt angles are 33°. Ge(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with eight equivalent Al(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 51-55°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Al(1) and one Ge(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Al(1) and one Ge(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Al(1) and one Ge(1) atom. F(1) is bonded in a bent 150 degrees geometry to two equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_Al2Ge(O2F)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.818
_cell_length_b   8.632
_cell_length_c   9.087
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   377.918
_cell_formula_units_Z   4
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
  Al  Al0  1  0.594  0.082  0.869  1.0
  Al  Al1  1  0.094  0.918  0.631  1.0
  Al  Al2  1  0.406  0.582  0.131  1.0
  Al  Al3  1  0.406  0.918  0.131  1.0
  Al  Al4  1  0.906  0.418  0.369  1.0
  Al  Al5  1  0.094  0.582  0.631  1.0
  Al  Al6  1  0.906  0.082  0.369  1.0
  Al  Al7  1  0.594  0.418  0.869  1.0
  Ge  Ge8  1  0.399  0.250  0.560  1.0
  Ge  Ge9  1  0.601  0.750  0.440  1.0
  Ge  Ge10  1  0.899  0.750  0.940  1.0
  Ge  Ge11  1  0.101  0.250  0.060  1.0
  O  O12  1  0.204  0.084  0.509  1.0
  O  O13  1  0.459  0.250  0.754  1.0
  O  O14  1  0.796  0.916  0.491  1.0
  O  O15  1  0.780  0.250  0.965  1.0
  O  O16  1  0.541  0.750  0.246  1.0
  O  O17  1  0.204  0.416  0.509  1.0
  O  O18  1  0.296  0.084  0.009  1.0
  O  O19  1  0.959  0.750  0.746  1.0
  O  O20  1  0.296  0.416  0.009  1.0
  O  O21  1  0.220  0.750  0.035  1.0
  O  O22  1  0.704  0.916  0.991  1.0
  O  O23  1  0.280  0.750  0.535  1.0
  O  O24  1  0.720  0.250  0.465  1.0
  O  O25  1  0.704  0.584  0.991  1.0
  O  O26  1  0.796  0.584  0.491  1.0
  O  O27  1  0.041  0.250  0.254  1.0
  F  F28  1  0.104  0.947  0.251  1.0
  F  F29  1  0.104  0.553  0.251  1.0
  F  F30  1  0.396  0.553  0.751  1.0
  F  F31  1  0.604  0.053  0.249  1.0
  F  F32  1  0.896  0.053  0.749  1.0
  F  F33  1  0.396  0.947  0.751  1.0
  F  F34  1  0.604  0.447  0.249  1.0
  F  F35  1  0.896  0.447  0.749  1.0
[/CIF]
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