The material described by (Na(BO4)2)4O2 crystallizes in the monoclinic C2/c space group. The structure consists of four water atoms inside a Na(BO4)2 framework. In the Na(BO4)2 framework, Na(1) is bonded in a 5-coordinate geometry to one O(5), one O(7), one O(8), and two equivalent O(2) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(4) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(4) atom. There are nine inequivalent O sites. In the first O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent B(1) atoms. In the second O site, O(4) is bonded in a bent 150 degrees geometry to one B(1) and one B(2) atom. In the third O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one O(5), and one O(9) atom. In the fourth O site, O(6) is bonded in a single-bond geometry to one O(7) atom. In the fifth O site, O(7) is bonded in a bent 120 degrees geometry to one Na(1) and one O(6) atom. In the sixth O site, O(8) is bonded in a bent 120 degrees geometry to one Na(1) and one O(8) atom. In the seventh O site, O(9) is bonded in a 2-coordinate geometry to two equivalent O(5) atoms. In the eighth O site, O(1) is bonded in a bent 150 degrees geometry to one B(1) and one B(2) atom. In the ninth O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one B(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2B4O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.277
_cell_length_b   8.277
_cell_length_c   12.789
_cell_angle_alpha   76.462
_cell_angle_beta   103.538
_cell_angle_gamma   108.598
_symmetry_Int_Tables_number   1
_cell_volume   795.175
_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  0.599  0.415  0.452  1.0
  Na  Na1  1  0.415  0.599  0.048  1.0
  Na  Na2  1  0.401  0.585  0.548  1.0
  Na  Na3  1  0.585  0.401  0.952  1.0
  B  B4  1  0.987  0.000  0.643  1.0
  B  B5  1  0.000  0.987  0.857  1.0
  B  B6  1  0.013  1.000  0.357  1.0
  B  B7  1  1.000  0.013  0.143  1.0
  B  B8  1  0.791  0.818  0.486  1.0
  B  B9  1  0.818  0.791  0.014  1.0
  B  B10  1  0.209  0.182  0.514  1.0
  B  B11  1  0.182  0.209  0.986  1.0
  O  O12  1  0.856  0.908  0.574  1.0
  O  O13  1  0.908  0.856  0.926  1.0
  O  O14  1  0.144  0.092  0.426  1.0
  O  O15  1  0.092  0.144  0.074  1.0
  O  O16  1  0.657  0.679  0.490  1.0
  O  O17  1  0.679  0.657  0.010  1.0
  O  O18  1  0.343  0.321  0.510  1.0
  O  O19  1  0.321  0.343  0.990  1.0
  O  O20  1  0.969  0.969  0.750  1.0
  O  O21  1  0.031  0.031  0.250  1.0
  O  O22  1  0.869  0.880  0.391  1.0
  O  O23  1  0.880  0.869  0.109  1.0
  O  O24  1  0.131  0.120  0.609  1.0
  O  O25  1  0.120  0.131  0.891  1.0
  O  O26  1  0.587  0.510  0.720  1.0
  O  O27  1  0.510  0.587  0.780  1.0
  O  O28  1  0.413  0.490  0.280  1.0
  O  O29  1  0.490  0.413  0.220  1.0
  O  O30  1  0.891  0.365  0.316  1.0
  O  O31  1  0.365  0.891  0.184  1.0
  O  O32  1  0.109  0.635  0.684  1.0
  O  O33  1  0.635  0.109  0.816  1.0
  O  O34  1  0.787  0.270  0.376  1.0
  O  O35  1  0.270  0.787  0.124  1.0
  O  O36  1  0.213  0.730  0.624  1.0
  O  O37  1  0.730  0.213  0.876  1.0
  O  O38  1  0.947  0.457  0.530  1.0
  O  O39  1  0.457  0.947  0.970  1.0
  O  O40  1  0.053  0.543  0.470  1.0
  O  O41  1  0.543  0.053  0.030  1.0
  O  O42  1  0.680  0.680  0.750  1.0
  O  O43  1  0.320  0.320  0.250  1.0
  O  O44  1  0.290  0.290  0.750  1.0
  O  O45  1  0.710  0.710  0.250  1.0
[/CIF]
.
The material described by (Na(BO4)2)4O2 crystallizes in the monoclinic C2/c space group. The structure consists of four water atoms inside a Na(BO4)2 framework. In the Na(BO4)2 framework, Na(1) is bonded in a 5-coordinate geometry to one O(5), one O(7), one O(8), and two equivalent O(2) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(4) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(4) atom. There are nine inequivalent O sites. In the first O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent B(1) atoms. In the second O site, O(4) is bonded in a bent 150 degrees geometry to one B(1) and one B(2) atom. In the third O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one O(5), and one O(9) atom. In the fourth O site, O(6) is bonded in a single-bond geometry to one O(7) atom. In the fifth O site, O(7) is bonded in a bent 120 degrees geometry to one Na(1) and one O(6) atom. In the sixth O site, O(8) is bonded in a bent 120 degrees geometry to one Na(1) and one O(8) atom. In the seventh O site, O(9) is bonded in a 2-coordinate geometry to two equivalent O(5) atoms. In the eighth O site, O(1) is bonded in a bent 150 degrees geometry to one B(1) and one B(2) atom. In the ninth O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one B(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2B4O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.277
_cell_length_b   8.277
_cell_length_c   12.789
_cell_angle_alpha   76.462
_cell_angle_beta   103.538
_cell_angle_gamma   108.598
_symmetry_Int_Tables_number   1
_cell_volume   795.175
_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  0.599  0.415  0.452  1.0
  Na  Na1  1  0.415  0.599  0.048  1.0
  Na  Na2  1  0.401  0.585  0.548  1.0
  Na  Na3  1  0.585  0.401  0.952  1.0
  B  B4  1  0.987  0.000  0.643  1.0
  B  B5  1  0.000  0.987  0.857  1.0
  B  B6  1  0.013  1.000  0.357  1.0
  B  B7  1  1.000  0.013  0.143  1.0
  B  B8  1  0.791  0.818  0.486  1.0
  B  B9  1  0.818  0.791  0.014  1.0
  B  B10  1  0.209  0.182  0.514  1.0
  B  B11  1  0.182  0.209  0.986  1.0
  O  O12  1  0.856  0.908  0.574  1.0
  O  O13  1  0.908  0.856  0.926  1.0
  O  O14  1  0.144  0.092  0.426  1.0
  O  O15  1  0.092  0.144  0.074  1.0
  O  O16  1  0.657  0.679  0.490  1.0
  O  O17  1  0.679  0.657  0.010  1.0
  O  O18  1  0.343  0.321  0.510  1.0
  O  O19  1  0.321  0.343  0.990  1.0
  O  O20  1  0.969  0.969  0.750  1.0
  O  O21  1  0.031  0.031  0.250  1.0
  O  O22  1  0.869  0.880  0.391  1.0
  O  O23  1  0.880  0.869  0.109  1.0
  O  O24  1  0.131  0.120  0.609  1.0
  O  O25  1  0.120  0.131  0.891  1.0
  O  O26  1  0.587  0.510  0.720  1.0
  O  O27  1  0.510  0.587  0.780  1.0
  O  O28  1  0.413  0.490  0.280  1.0
  O  O29  1  0.490  0.413  0.220  1.0
  O  O30  1  0.891  0.365  0.316  1.0
  O  O31  1  0.365  0.891  0.184  1.0
  O  O32  1  0.109  0.635  0.684  1.0
  O  O33  1  0.635  0.109  0.816  1.0
  O  O34  1  0.787  0.270  0.376  1.0
  O  O35  1  0.270  0.787  0.124  1.0
  O  O36  1  0.213  0.730  0.624  1.0
  O  O37  1  0.730  0.213  0.876  1.0
  O  O38  1  0.947  0.457  0.530  1.0
  O  O39  1  0.457  0.947  0.970  1.0
  O  O40  1  0.053  0.543  0.470  1.0
  O  O41  1  0.543  0.053  0.030  1.0
  O  O42  1  0.680  0.680  0.750  1.0
  O  O43  1  0.320  0.320  0.250  1.0
  O  O44  1  0.290  0.290  0.750  1.0
  O  O45  1  0.710  0.710  0.250  1.0
[/CIF]
.