The structure described by Na2Ba2B10H2O19 crystallizes in the monoclinic C2 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(7) atoms to form distorted NaO6 pentagonal pyramids that share corners with two equivalent B(2)O4 tetrahedra, corners with two equivalent B(5)O4 tetrahedra, and edges with two equivalent B(3)O4 tetrahedra. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms. Ba(1) is bonded in a 12-coordinate geometry to one H(1), one O(1), one O(10), one O(2), one O(6), one O(7), two equivalent O(4), two equivalent O(8), and two equivalent O(9) atoms. There are five inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(3), one O(5), and one O(6) atom. In the second B site, B(2) is bonded to one O(4), one O(5), one O(8), and one O(9) atom to form BO4 tetrahedra that share  a cornercorner with one Na(1)O6 pentagonal pyramid,  a cornercorner with one B(3)O4 tetrahedra, and  a cornercorner with one B(5)O4 tetrahedra. In the third B site, B(3) is bonded to one O(1), one O(3), one O(4), and one O(7) atom to form BO4 tetrahedra that share  a cornercorner with one B(2)O4 tetrahedra,  a cornercorner with one B(5)O4 tetrahedra, and  an edgeedge with one Na(1)O6 pentagonal pyramid. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(9) atom. In the fifth B site, B(5) is bonded to one O(10), one O(2), one O(7), and one O(8) atom to form BO4 tetrahedra that share  a cornercorner with one Na(1)O6 pentagonal pyramid,  a cornercorner with one B(2)O4 tetrahedra,  a cornercorner with one B(3)O4 tetrahedra, and  a cornercorner with one B(5)O4 tetrahedra. H(1) is bonded in a single-bond geometry to one Ba(1) and one O(6) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Na(2), one Ba(1), one B(3), and one B(4) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one B(4), and one B(5) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Na(2), one B(1), and one B(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to two equivalent Ba(1), one B(2), and one B(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Na(2), one B(1), and one B(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one B(1), and one H(1) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Ba(1), one B(3), and one B(5) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to two equivalent Ba(1), one B(2), and one B(5) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one B(2), and one B(4) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to two equivalent Ba(1) and two equivalent B(5) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba2Na2B10H2O19
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.690
_cell_length_b   6.690
_cell_length_c   9.479
_cell_angle_alpha   87.067
_cell_angle_beta   87.067
_cell_angle_gamma   60.547
_symmetry_Int_Tables_number   1
_cell_volume   368.752
_cell_formula_units_Z   1
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
  Ba  Ba0  1  0.669  0.668  0.107  1.0
  Ba  Ba1  1  0.332  0.331  0.893  1.0
  Na  Na2  1  0.693  0.307  0.500  1.0
  Na  Na3  1  0.211  0.789  0.500  1.0
  B  B4  1  0.693  0.803  0.532  1.0
  B  B5  1  0.197  0.307  0.468  1.0
  B  B6  1  0.647  0.681  0.778  1.0
  B  B7  1  0.319  0.353  0.222  1.0
  B  B8  1  0.822  0.943  0.732  1.0
  B  B9  1  0.057  0.178  0.268  1.0
  B  B10  1  0.204  0.861  0.828  1.0
  B  B11  1  0.139  0.796  0.172  1.0
  B  B12  1  0.858  0.247  0.864  1.0
  B  B13  1  0.753  0.142  0.136  1.0
  H  H14  1  0.057  0.359  0.664  1.0
  H  H15  1  0.641  0.943  0.336  1.0
  O  O16  1  0.074  0.787  0.762  1.0
  O  O17  1  0.213  0.926  0.238  1.0
  O  O18  1  0.922  0.888  0.124  1.0
  O  O19  1  0.112  0.078  0.876  1.0
  O  O20  1  0.802  0.916  0.575  1.0
  O  O21  1  0.084  0.198  0.425  1.0
  O  O22  1  0.669  0.880  0.814  1.0
  O  O23  1  0.120  0.331  0.186  1.0
  O  O24  1  0.618  0.681  0.619  1.0
  O  O25  1  0.319  0.382  0.381  1.0
  O  O26  1  0.192  0.352  0.611  1.0
  O  O27  1  0.648  0.808  0.389  1.0
  O  O28  1  0.760  0.181  0.750  1.0
  O  O29  1  0.819  0.240  0.250  1.0
  O  O30  1  0.849  0.469  0.826  1.0
  O  O31  1  0.531  0.151  0.174  1.0
  O  O32  1  0.434  0.699  0.849  1.0
  O  O33  1  0.301  0.566  0.151  1.0
  O  O34  1  0.735  0.265  0.000  1.0
[/CIF]
.
The structure described by Na2Ba2B10H2O19 crystallizes in the monoclinic C2 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(7) atoms to form distorted NaO6 pentagonal pyramids that share corners with two equivalent B(2)O4 tetrahedra, corners with two equivalent B(5)O4 tetrahedra, and edges with two equivalent B(3)O4 tetrahedra. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms. Ba(1) is bonded in a 12-coordinate geometry to one H(1), one O(1), one O(10), one O(2), one O(6), one O(7), two equivalent O(4), two equivalent O(8), and two equivalent O(9) atoms. There are five inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(3), one O(5), and one O(6) atom. In the second B site, B(2) is bonded to one O(4), one O(5), one O(8), and one O(9) atom to form BO4 tetrahedra that share  a cornercorner with one Na(1)O6 pentagonal pyramid,  a cornercorner with one B(3)O4 tetrahedra, and  a cornercorner with one B(5)O4 tetrahedra. In the third B site, B(3) is bonded to one O(1), one O(3), one O(4), and one O(7) atom to form BO4 tetrahedra that share  a cornercorner with one B(2)O4 tetrahedra,  a cornercorner with one B(5)O4 tetrahedra, and  an edgeedge with one Na(1)O6 pentagonal pyramid. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(9) atom. In the fifth B site, B(5) is bonded to one O(10), one O(2), one O(7), and one O(8) atom to form BO4 tetrahedra that share  a cornercorner with one Na(1)O6 pentagonal pyramid,  a cornercorner with one B(2)O4 tetrahedra,  a cornercorner with one B(3)O4 tetrahedra, and  a cornercorner with one B(5)O4 tetrahedra. H(1) is bonded in a single-bond geometry to one Ba(1) and one O(6) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Na(2), one Ba(1), one B(3), and one B(4) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one B(4), and one B(5) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Na(2), one B(1), and one B(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to two equivalent Ba(1), one B(2), and one B(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Na(2), one B(1), and one B(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one B(1), and one H(1) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Ba(1), one B(3), and one B(5) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to two equivalent Ba(1), one B(2), and one B(5) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one B(2), and one B(4) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to two equivalent Ba(1) and two equivalent B(5) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba2Na2B10H2O19
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.690
_cell_length_b   6.690
_cell_length_c   9.479
_cell_angle_alpha   87.067
_cell_angle_beta   87.067
_cell_angle_gamma   60.547
_symmetry_Int_Tables_number   1
_cell_volume   368.752
_cell_formula_units_Z   1
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
  Ba  Ba0  1  0.669  0.668  0.107  1.0
  Ba  Ba1  1  0.332  0.331  0.893  1.0
  Na  Na2  1  0.693  0.307  0.500  1.0
  Na  Na3  1  0.211  0.789  0.500  1.0
  B  B4  1  0.693  0.803  0.532  1.0
  B  B5  1  0.197  0.307  0.468  1.0
  B  B6  1  0.647  0.681  0.778  1.0
  B  B7  1  0.319  0.353  0.222  1.0
  B  B8  1  0.822  0.943  0.732  1.0
  B  B9  1  0.057  0.178  0.268  1.0
  B  B10  1  0.204  0.861  0.828  1.0
  B  B11  1  0.139  0.796  0.172  1.0
  B  B12  1  0.858  0.247  0.864  1.0
  B  B13  1  0.753  0.142  0.136  1.0
  H  H14  1  0.057  0.359  0.664  1.0
  H  H15  1  0.641  0.943  0.336  1.0
  O  O16  1  0.074  0.787  0.762  1.0
  O  O17  1  0.213  0.926  0.238  1.0
  O  O18  1  0.922  0.888  0.124  1.0
  O  O19  1  0.112  0.078  0.876  1.0
  O  O20  1  0.802  0.916  0.575  1.0
  O  O21  1  0.084  0.198  0.425  1.0
  O  O22  1  0.669  0.880  0.814  1.0
  O  O23  1  0.120  0.331  0.186  1.0
  O  O24  1  0.618  0.681  0.619  1.0
  O  O25  1  0.319  0.382  0.381  1.0
  O  O26  1  0.192  0.352  0.611  1.0
  O  O27  1  0.648  0.808  0.389  1.0
  O  O28  1  0.760  0.181  0.750  1.0
  O  O29  1  0.819  0.240  0.250  1.0
  O  O30  1  0.849  0.469  0.826  1.0
  O  O31  1  0.531  0.151  0.174  1.0
  O  O32  1  0.434  0.699  0.849  1.0
  O  O33  1  0.301  0.566  0.151  1.0
  O  O34  1  0.735  0.265  0.000  1.0
[/CIF]
.