The compound described by LiAlSiH2O5 crystallizes in the orthorhombic Pna2_1 space group. Li(1) is bonded to one O(3), one O(5), and two equivalent O(2) atoms to form LiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. Al(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form AlO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and  an edgeedge with one Al(1)O4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(2) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Al(1) and one Si(1) atom. In the second O site, O(2) is bonded to two equivalent Li(1), one H(1), and one H(2) atom to form distorted corner-sharing OLi2H2 tetrahedra. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Li(1), one Al(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Al(1) and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Li(1), one Al(1), and one Si(1) atom. is represented by the CIF card [CIF]
data_LiAlSiH2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.425
_cell_length_b   7.332
_cell_length_c   12.205
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   485.454
_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
  Li  Li0  1  0.347  0.985  0.585  1.0
  Li  Li1  1  0.847  0.485  0.915  1.0
  Li  Li2  1  0.847  0.015  0.415  1.0
  Li  Li3  1  0.347  0.515  0.085  1.0
  Al  Al4  1  0.595  0.619  0.307  1.0
  Al  Al5  1  0.095  0.119  0.193  1.0
  Al  Al6  1  0.595  0.881  0.807  1.0
  Al  Al7  1  0.095  0.381  0.693  1.0
  Si  Si8  1  0.093  0.401  0.307  1.0
  Si  Si9  1  0.593  0.901  0.193  1.0
  Si  Si10  1  0.593  0.599  0.693  1.0
  Si  Si11  1  0.093  0.099  0.807  1.0
  H  H12  1  0.786  0.134  0.593  1.0
  H  H13  1  0.286  0.634  0.907  1.0
  H  H14  1  0.286  0.866  0.407  1.0
  H  H15  1  0.612  0.270  0.531  1.0
  H  H16  1  0.112  0.730  0.469  1.0
  H  H17  1  0.112  0.770  0.969  1.0
  H  H18  1  0.786  0.366  0.093  1.0
  H  H19  1  0.612  0.230  0.031  1.0
  O  O20  1  0.368  0.476  0.649  1.0
  O  O21  1  0.868  0.976  0.851  1.0
  O  O22  1  0.652  0.360  0.037  1.0
  O  O23  1  0.094  0.133  0.669  1.0
  O  O24  1  0.847  0.991  0.150  1.0
  O  O25  1  0.847  0.509  0.650  1.0
  O  O26  1  0.565  0.820  0.663  1.0
  O  O27  1  0.565  0.680  0.163  1.0
  O  O28  1  0.347  0.491  0.350  1.0
  O  O29  1  0.347  0.009  0.850  1.0
  O  O30  1  0.152  0.640  0.963  1.0
  O  O31  1  0.652  0.140  0.537  1.0
  O  O32  1  0.152  0.860  0.463  1.0
  O  O33  1  0.065  0.320  0.837  1.0
  O  O34  1  0.868  0.524  0.351  1.0
  O  O35  1  0.094  0.367  0.169  1.0
  O  O36  1  0.594  0.867  0.331  1.0
  O  O37  1  0.065  0.180  0.337  1.0
  O  O38  1  0.368  0.024  0.149  1.0
  O  O39  1  0.594  0.633  0.831  1.0
[/CIF]
.
The compound described by LiAlSiH2O5 crystallizes in the orthorhombic Pna2_1 space group. Li(1) is bonded to one O(3), one O(5), and two equivalent O(2) atoms to form LiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. Al(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form AlO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and  an edgeedge with one Al(1)O4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(2) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Al(1) and one Si(1) atom. In the second O site, O(2) is bonded to two equivalent Li(1), one H(1), and one H(2) atom to form distorted corner-sharing OLi2H2 tetrahedra. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Li(1), one Al(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Al(1) and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Li(1), one Al(1), and one Si(1) atom. is represented by the CIF card [CIF]
data_LiAlSiH2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.425
_cell_length_b   7.332
_cell_length_c   12.205
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   485.454
_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
  Li  Li0  1  0.347  0.985  0.585  1.0
  Li  Li1  1  0.847  0.485  0.915  1.0
  Li  Li2  1  0.847  0.015  0.415  1.0
  Li  Li3  1  0.347  0.515  0.085  1.0
  Al  Al4  1  0.595  0.619  0.307  1.0
  Al  Al5  1  0.095  0.119  0.193  1.0
  Al  Al6  1  0.595  0.881  0.807  1.0
  Al  Al7  1  0.095  0.381  0.693  1.0
  Si  Si8  1  0.093  0.401  0.307  1.0
  Si  Si9  1  0.593  0.901  0.193  1.0
  Si  Si10  1  0.593  0.599  0.693  1.0
  Si  Si11  1  0.093  0.099  0.807  1.0
  H  H12  1  0.786  0.134  0.593  1.0
  H  H13  1  0.286  0.634  0.907  1.0
  H  H14  1  0.286  0.866  0.407  1.0
  H  H15  1  0.612  0.270  0.531  1.0
  H  H16  1  0.112  0.730  0.469  1.0
  H  H17  1  0.112  0.770  0.969  1.0
  H  H18  1  0.786  0.366  0.093  1.0
  H  H19  1  0.612  0.230  0.031  1.0
  O  O20  1  0.368  0.476  0.649  1.0
  O  O21  1  0.868  0.976  0.851  1.0
  O  O22  1  0.652  0.360  0.037  1.0
  O  O23  1  0.094  0.133  0.669  1.0
  O  O24  1  0.847  0.991  0.150  1.0
  O  O25  1  0.847  0.509  0.650  1.0
  O  O26  1  0.565  0.820  0.663  1.0
  O  O27  1  0.565  0.680  0.163  1.0
  O  O28  1  0.347  0.491  0.350  1.0
  O  O29  1  0.347  0.009  0.850  1.0
  O  O30  1  0.152  0.640  0.963  1.0
  O  O31  1  0.652  0.140  0.537  1.0
  O  O32  1  0.152  0.860  0.463  1.0
  O  O33  1  0.065  0.320  0.837  1.0
  O  O34  1  0.868  0.524  0.351  1.0
  O  O35  1  0.094  0.367  0.169  1.0
  O  O36  1  0.594  0.867  0.331  1.0
  O  O37  1  0.065  0.180  0.337  1.0
  O  O38  1  0.368  0.024  0.149  1.0
  O  O39  1  0.594  0.633  0.831  1.0
[/CIF]
.