The structure described by Al4Si2H(O3F)3 crystallizes in the monoclinic Pc space group. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(4), one O(5), one O(7), one O(8), one O(9), and one F(3) atom to form AlO5F octahedra that share corners with two equivalent Al(2)O5F octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Al(4)O4F2 octahedra, and  an edgeedge with one Al(2)O5F octahedra. The corner-sharing octahedral tilt angles range from 38-39°. In the second Al site, Al(2) is bonded to one O(3), one O(6), one O(7), one O(8), one O(9), and one F(3) atom to form AlO5F octahedra that share corners with two equivalent Al(1)O5F octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Al(3)O4F2 octahedra, and  an edgeedge with one Al(1)O5F octahedra. The corner-sharing octahedral tilt angles range from 38-39°. In the third Al site, Al(3) is bonded to one O(1), one O(2), one O(3), one O(6), one F(1), and one F(2) atom to form AlO4F2 octahedra that share corners with two equivalent Al(4)O4F2 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Al(4)O4F2 octahedra, and  an edgeedge with one Al(2)O5F octahedra. The corner-sharing octahedral tilt angles are 35°. In the fourth Al site, Al(4) is bonded to one O(1), one O(2), one O(4), one O(5), one F(1), and one F(2) atom to form AlO4F2 octahedra that share corners with two equivalent Al(3)O4F2 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Al(3)O4F2 octahedra, and  an edgeedge with one Al(1)O5F octahedra. The corner-sharing octahedral tilt angles are 35°. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(5), one O(6), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Al(3)O4F2 octahedra, corners with two equivalent Al(4)O4F2 octahedra, corners with two equivalent Al(1)O5F octahedra, and corners with two equivalent Al(2)O5F octahedra. The corner-sharing octahedral tilt angles range from 48-52°. In the second Si site, Si(2) is bonded to one O(2), one O(3), one O(4), and one O(9) atom to form SiO4 tetrahedra that share corners with two equivalent Al(3)O4F2 octahedra, corners with two equivalent Al(4)O4F2 octahedra, corners with two equivalent Al(1)O5F octahedra, and corners with two equivalent Al(2)O5F octahedra. The corner-sharing octahedral tilt angles range from 49-52°. H(1) is bonded in a single-bond geometry to one O(8) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Al(3), one Al(4), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Al(3), one Al(4), and one Si(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Al(2), one Al(3), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(4), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(4), and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Al(2), one Al(3), and one Si(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(2), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Al(1), one Al(2), and one H(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(2), and one Si(2) atom. There are three inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one Al(3) and one Al(4) atom. In the second F site, F(2) is bonded in a bent 150 degrees geometry to one Al(3) and one Al(4) atom. In the third F site, F(3) is bonded in a bent 150 degrees geometry to one Al(1) and one Al(2) atom. is represented by the CIF file [CIF]
data_Al4Si2H(O3F)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.734
_cell_length_b   8.490
_cell_length_c   8.930
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.134
_symmetry_Int_Tables_number   1
_cell_volume   358.890
_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
  Al  Al0  1  0.092  0.583  0.868  1.0
  Al  Al1  1  0.096  0.920  0.870  1.0
  Al  Al2  1  0.403  0.584  0.368  1.0
  Al  Al3  1  0.403  0.918  0.369  1.0
  Al  Al4  1  0.592  0.083  0.632  1.0
  Al  Al5  1  0.596  0.420  0.630  1.0
  Al  Al6  1  0.903  0.084  0.132  1.0
  Al  Al7  1  0.903  0.418  0.131  1.0
  Si  Si8  1  0.101  0.250  0.440  1.0
  Si  Si9  1  0.398  0.251  0.943  1.0
  Si  Si10  1  0.601  0.750  0.060  1.0
  Si  Si11  1  0.898  0.751  0.557  1.0
  H  H12  1  0.479  0.833  0.734  1.0
  H  H13  1  0.979  0.333  0.766  1.0
  O  O14  1  0.036  0.251  0.257  1.0
  O  O15  1  0.204  0.751  0.467  1.0
  O  O16  1  0.207  0.095  0.991  1.0
  O  O17  1  0.211  0.408  0.991  1.0
  O  O18  1  0.292  0.094  0.486  1.0
  O  O19  1  0.292  0.408  0.488  1.0
  O  O20  1  0.297  0.749  0.968  1.0
  O  O21  1  0.404  0.938  0.748  1.0
  O  O22  1  0.449  0.251  0.758  1.0
  O  O23  1  0.536  0.751  0.243  1.0
  O  O24  1  0.704  0.251  0.033  1.0
  O  O25  1  0.707  0.595  0.509  1.0
  O  O26  1  0.711  0.908  0.509  1.0
  O  O27  1  0.792  0.594  0.014  1.0
  O  O28  1  0.792  0.908  0.012  1.0
  O  O29  1  0.797  0.249  0.532  1.0
  O  O30  1  0.904  0.438  0.752  1.0
  O  O31  1  0.949  0.751  0.742  1.0
  F  F32  1  0.096  0.945  0.249  1.0
  F  F33  1  0.096  0.556  0.250  1.0
  F  F34  1  0.405  0.564  0.747  1.0
  F  F35  1  0.596  0.056  0.250  1.0
  F  F36  1  0.596  0.445  0.251  1.0
  F  F37  1  0.905  0.064  0.753  1.0
[/CIF]
.
The structure described by Al4Si2H(O3F)3 crystallizes in the monoclinic Pc space group. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(4), one O(5), one O(7), one O(8), one O(9), and one F(3) atom to form AlO5F octahedra that share corners with two equivalent Al(2)O5F octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Al(4)O4F2 octahedra, and  an edgeedge with one Al(2)O5F octahedra. The corner-sharing octahedral tilt angles range from 38-39°. In the second Al site, Al(2) is bonded to one O(3), one O(6), one O(7), one O(8), one O(9), and one F(3) atom to form AlO5F octahedra that share corners with two equivalent Al(1)O5F octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Al(3)O4F2 octahedra, and  an edgeedge with one Al(1)O5F octahedra. The corner-sharing octahedral tilt angles range from 38-39°. In the third Al site, Al(3) is bonded to one O(1), one O(2), one O(3), one O(6), one F(1), and one F(2) atom to form AlO4F2 octahedra that share corners with two equivalent Al(4)O4F2 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Al(4)O4F2 octahedra, and  an edgeedge with one Al(2)O5F octahedra. The corner-sharing octahedral tilt angles are 35°. In the fourth Al site, Al(4) is bonded to one O(1), one O(2), one O(4), one O(5), one F(1), and one F(2) atom to form AlO4F2 octahedra that share corners with two equivalent Al(3)O4F2 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Al(3)O4F2 octahedra, and  an edgeedge with one Al(1)O5F octahedra. The corner-sharing octahedral tilt angles are 35°. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(5), one O(6), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Al(3)O4F2 octahedra, corners with two equivalent Al(4)O4F2 octahedra, corners with two equivalent Al(1)O5F octahedra, and corners with two equivalent Al(2)O5F octahedra. The corner-sharing octahedral tilt angles range from 48-52°. In the second Si site, Si(2) is bonded to one O(2), one O(3), one O(4), and one O(9) atom to form SiO4 tetrahedra that share corners with two equivalent Al(3)O4F2 octahedra, corners with two equivalent Al(4)O4F2 octahedra, corners with two equivalent Al(1)O5F octahedra, and corners with two equivalent Al(2)O5F octahedra. The corner-sharing octahedral tilt angles range from 49-52°. H(1) is bonded in a single-bond geometry to one O(8) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Al(3), one Al(4), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Al(3), one Al(4), and one Si(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Al(2), one Al(3), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(4), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(4), and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Al(2), one Al(3), and one Si(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(2), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Al(1), one Al(2), and one H(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(2), and one Si(2) atom. There are three inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one Al(3) and one Al(4) atom. In the second F site, F(2) is bonded in a bent 150 degrees geometry to one Al(3) and one Al(4) atom. In the third F site, F(3) is bonded in a bent 150 degrees geometry to one Al(1) and one Al(2) atom. is represented by the CIF file [CIF]
data_Al4Si2H(O3F)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.734
_cell_length_b   8.490
_cell_length_c   8.930
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.134
_symmetry_Int_Tables_number   1
_cell_volume   358.890
_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
  Al  Al0  1  0.092  0.583  0.868  1.0
  Al  Al1  1  0.096  0.920  0.870  1.0
  Al  Al2  1  0.403  0.584  0.368  1.0
  Al  Al3  1  0.403  0.918  0.369  1.0
  Al  Al4  1  0.592  0.083  0.632  1.0
  Al  Al5  1  0.596  0.420  0.630  1.0
  Al  Al6  1  0.903  0.084  0.132  1.0
  Al  Al7  1  0.903  0.418  0.131  1.0
  Si  Si8  1  0.101  0.250  0.440  1.0
  Si  Si9  1  0.398  0.251  0.943  1.0
  Si  Si10  1  0.601  0.750  0.060  1.0
  Si  Si11  1  0.898  0.751  0.557  1.0
  H  H12  1  0.479  0.833  0.734  1.0
  H  H13  1  0.979  0.333  0.766  1.0
  O  O14  1  0.036  0.251  0.257  1.0
  O  O15  1  0.204  0.751  0.467  1.0
  O  O16  1  0.207  0.095  0.991  1.0
  O  O17  1  0.211  0.408  0.991  1.0
  O  O18  1  0.292  0.094  0.486  1.0
  O  O19  1  0.292  0.408  0.488  1.0
  O  O20  1  0.297  0.749  0.968  1.0
  O  O21  1  0.404  0.938  0.748  1.0
  O  O22  1  0.449  0.251  0.758  1.0
  O  O23  1  0.536  0.751  0.243  1.0
  O  O24  1  0.704  0.251  0.033  1.0
  O  O25  1  0.707  0.595  0.509  1.0
  O  O26  1  0.711  0.908  0.509  1.0
  O  O27  1  0.792  0.594  0.014  1.0
  O  O28  1  0.792  0.908  0.012  1.0
  O  O29  1  0.797  0.249  0.532  1.0
  O  O30  1  0.904  0.438  0.752  1.0
  O  O31  1  0.949  0.751  0.742  1.0
  F  F32  1  0.096  0.945  0.249  1.0
  F  F33  1  0.096  0.556  0.250  1.0
  F  F34  1  0.405  0.564  0.747  1.0
  F  F35  1  0.596  0.056  0.250  1.0
  F  F36  1  0.596  0.445  0.251  1.0
  F  F37  1  0.905  0.064  0.753  1.0
[/CIF]
.