The compound described by Na2ZrSi4H4O13 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(6) atom. Zr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form ZrO6 octahedra that share corners with two equivalent Si(2)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form SiO4 tetrahedra that share corners with two equivalent Zr(1)O6 octahedra and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 35-44°. In the second Si site, Si(2) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Zr(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(4) atom. There are seven inequivalent O sites. In the first O site, O(4) is bonded in a distorted water-like geometry to one Na(1), one H(1), and one H(2) atom. In the second O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Si(1) and one Si(2) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to one Na(1), one Si(1), and one Si(2) atom. In the fourth O site, O(7) is bonded in a linear geometry to two equivalent Si(2) atoms. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Zr(1), and one Si(1) atom. In the sixth O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Zr(1), and one Si(1) atom. In the seventh O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Zr(1), and one Si(2) atom. is represented by the CIF card [CIF]
data_Na2ZrSi4H4O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.932
_cell_length_b   7.658
_cell_length_c   9.236
_cell_angle_alpha   67.145
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   582.142
_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
  Na  Na0  1  0.688  0.289  0.209  1.0
  Na  Na1  1  0.312  0.711  0.791  1.0
  Na  Na2  1  0.188  0.211  0.791  1.0
  Na  Na3  1  0.812  0.789  0.209  1.0
  Zr  Zr4  1  0.500  0.000  0.000  1.0
  Zr  Zr5  1  0.000  0.500  0.000  1.0
  Si  Si6  1  0.342  0.301  0.169  1.0
  Si  Si7  1  0.658  0.699  0.831  1.0
  Si  Si8  1  0.842  0.199  0.831  1.0
  Si  Si9  1  0.158  0.801  0.169  1.0
  Si  Si10  1  0.059  0.089  0.319  1.0
  Si  Si11  1  0.941  0.911  0.681  1.0
  Si  Si12  1  0.559  0.411  0.681  1.0
  Si  Si13  1  0.441  0.589  0.319  1.0
  H  H14  1  0.302  0.081  0.512  1.0
  H  H15  1  0.698  0.919  0.488  1.0
  H  H16  1  0.802  0.419  0.488  1.0
  H  H17  1  0.198  0.581  0.512  1.0
  H  H18  1  0.899  0.403  0.350  1.0
  H  H19  1  0.101  0.597  0.650  1.0
  H  H20  1  0.399  0.097  0.650  1.0
  H  H21  1  0.601  0.903  0.350  1.0
  O  O22  1  0.233  0.434  0.027  1.0
  O  O23  1  0.767  0.566  0.973  1.0
  O  O24  1  0.733  0.066  0.973  1.0
  O  O25  1  0.267  0.934  0.027  1.0
  O  O26  1  0.466  0.184  0.116  1.0
  O  O27  1  0.534  0.816  0.884  1.0
  O  O28  1  0.966  0.316  0.884  1.0
  O  O29  1  0.034  0.684  0.116  1.0
  O  O30  1  0.958  0.270  0.217  1.0
  O  O31  1  0.042  0.730  0.783  1.0
  O  O32  1  0.458  0.230  0.783  1.0
  O  O33  1  0.542  0.770  0.217  1.0
  O  O34  1  0.815  0.470  0.373  1.0
  O  O35  1  0.185  0.530  0.627  1.0
  O  O36  1  0.315  0.030  0.627  1.0
  O  O37  1  0.685  0.970  0.373  1.0
  O  O38  1  0.236  0.155  0.316  1.0
  O  O39  1  0.764  0.845  0.684  1.0
  O  O40  1  0.736  0.345  0.684  1.0
  O  O41  1  0.264  0.655  0.316  1.0
  O  O42  1  0.445  0.422  0.249  1.0
  O  O43  1  0.555  0.578  0.751  1.0
  O  O44  1  0.945  0.078  0.751  1.0
  O  O45  1  0.055  0.922  0.249  1.0
  O  O46  1  0.500  0.500  0.500  1.0
  O  O47  1  0.000  0.000  0.500  1.0
[/CIF]
.
The compound described by Na2ZrSi4H4O13 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(6) atom. Zr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form ZrO6 octahedra that share corners with two equivalent Si(2)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form SiO4 tetrahedra that share corners with two equivalent Zr(1)O6 octahedra and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 35-44°. In the second Si site, Si(2) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Zr(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(4) atom. There are seven inequivalent O sites. In the first O site, O(4) is bonded in a distorted water-like geometry to one Na(1), one H(1), and one H(2) atom. In the second O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Si(1) and one Si(2) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to one Na(1), one Si(1), and one Si(2) atom. In the fourth O site, O(7) is bonded in a linear geometry to two equivalent Si(2) atoms. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Zr(1), and one Si(1) atom. In the sixth O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Zr(1), and one Si(1) atom. In the seventh O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Zr(1), and one Si(2) atom. is represented by the CIF card [CIF]
data_Na2ZrSi4H4O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.932
_cell_length_b   7.658
_cell_length_c   9.236
_cell_angle_alpha   67.145
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   582.142
_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
  Na  Na0  1  0.688  0.289  0.209  1.0
  Na  Na1  1  0.312  0.711  0.791  1.0
  Na  Na2  1  0.188  0.211  0.791  1.0
  Na  Na3  1  0.812  0.789  0.209  1.0
  Zr  Zr4  1  0.500  0.000  0.000  1.0
  Zr  Zr5  1  0.000  0.500  0.000  1.0
  Si  Si6  1  0.342  0.301  0.169  1.0
  Si  Si7  1  0.658  0.699  0.831  1.0
  Si  Si8  1  0.842  0.199  0.831  1.0
  Si  Si9  1  0.158  0.801  0.169  1.0
  Si  Si10  1  0.059  0.089  0.319  1.0
  Si  Si11  1  0.941  0.911  0.681  1.0
  Si  Si12  1  0.559  0.411  0.681  1.0
  Si  Si13  1  0.441  0.589  0.319  1.0
  H  H14  1  0.302  0.081  0.512  1.0
  H  H15  1  0.698  0.919  0.488  1.0
  H  H16  1  0.802  0.419  0.488  1.0
  H  H17  1  0.198  0.581  0.512  1.0
  H  H18  1  0.899  0.403  0.350  1.0
  H  H19  1  0.101  0.597  0.650  1.0
  H  H20  1  0.399  0.097  0.650  1.0
  H  H21  1  0.601  0.903  0.350  1.0
  O  O22  1  0.233  0.434  0.027  1.0
  O  O23  1  0.767  0.566  0.973  1.0
  O  O24  1  0.733  0.066  0.973  1.0
  O  O25  1  0.267  0.934  0.027  1.0
  O  O26  1  0.466  0.184  0.116  1.0
  O  O27  1  0.534  0.816  0.884  1.0
  O  O28  1  0.966  0.316  0.884  1.0
  O  O29  1  0.034  0.684  0.116  1.0
  O  O30  1  0.958  0.270  0.217  1.0
  O  O31  1  0.042  0.730  0.783  1.0
  O  O32  1  0.458  0.230  0.783  1.0
  O  O33  1  0.542  0.770  0.217  1.0
  O  O34  1  0.815  0.470  0.373  1.0
  O  O35  1  0.185  0.530  0.627  1.0
  O  O36  1  0.315  0.030  0.627  1.0
  O  O37  1  0.685  0.970  0.373  1.0
  O  O38  1  0.236  0.155  0.316  1.0
  O  O39  1  0.764  0.845  0.684  1.0
  O  O40  1  0.736  0.345  0.684  1.0
  O  O41  1  0.264  0.655  0.316  1.0
  O  O42  1  0.445  0.422  0.249  1.0
  O  O43  1  0.555  0.578  0.751  1.0
  O  O44  1  0.945  0.078  0.751  1.0
  O  O45  1  0.055  0.922  0.249  1.0
  O  O46  1  0.500  0.500  0.500  1.0
  O  O47  1  0.000  0.000  0.500  1.0
[/CIF]
.