The crystal structure described by Y3B3O7 crystallizes in the orthorhombic Amm2 space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded to one B(1), one O(7), three equivalent O(1), and three equivalent O(6) atoms to form distorted YBO7 hexagonal bipyramids that share  a cornercorner with one Y(2)B2O6 hexagonal bipyramid,  a cornercorner with one Y(3)BO7 hexagonal bipyramid, and edges with six equivalent Y(1)BO7 hexagonal bipyramids. In the second Y site, Y(2) is bonded to one B(1), one B(3), three equivalent O(2), and three equivalent O(4) atoms to form distorted YB2O6 hexagonal bipyramids that share  a cornercorner with one Y(2)B2O6 hexagonal bipyramid,  a cornercorner with one Y(1)BO7 hexagonal bipyramid, and edges with six equivalent Y(2)B2O6 hexagonal bipyramids. In the third Y site, Y(3) is bonded to one B(2), one O(7), three equivalent O(3), and three equivalent O(5) atoms to form a mixture of distorted corner and edge-sharing YBO7 hexagonal bipyramids. There are four inequivalent B sites. In the first B site, B(1) is bonded in a bent 120 degrees geometry to one Y(1), one Y(2), one O(1), and one O(2) atom. In the second B site, B(2) is bonded in a bent 120 degrees geometry to two equivalent Y(3) and two equivalent O(3) atoms. In the third B site, B(3) is bonded in a bent 120 degrees geometry to two equivalent Y(2) and two equivalent O(4) atoms. In the fourth B site, B(4) is bonded in a distorted bent 150 degrees geometry to one O(5), one O(6), and two equivalent O(7) atoms. There are seven inequivalent O sites. In the first O site, O(6) is bonded in a distorted single-bond geometry to three equivalent Y(1) and one B(4) atom. In the second O site, O(7) is bonded in a see-saw-like geometry to one Y(1), one Y(3), and two equivalent B(4) atoms. In the third O site, O(1) is bonded in a 4-coordinate geometry to three equivalent Y(1) and one B(1) atom. In the fourth O site, O(2) is bonded in a 4-coordinate geometry to three equivalent Y(2) and one B(1) atom. In the fifth O site, O(3) is bonded in a 4-coordinate geometry to three equivalent Y(3) and one B(2) atom. In the sixth O site, O(4) is bonded in a 4-coordinate geometry to three equivalent Y(2) and one B(3) atom. In the seventh O site, O(5) is bonded in a distorted single-bond geometry to three equivalent Y(3) and one B(4) atom. is represented by the CIF file [CIF]
data_Y3B3O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.024
_cell_length_b   4.024
_cell_length_c   25.141
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   123.874
_symmetry_Int_Tables_number   1
_cell_volume   337.959
_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
  Y  Y0  1  0.005  0.995  0.005  1.0
  Y  Y1  1  0.999  0.001  0.168  1.0
  Y  Y2  1  0.999  0.001  0.332  1.0
  Y  Y3  1  0.005  0.995  0.495  1.0
  Y  Y4  1  0.012  0.988  0.668  1.0
  Y  Y5  1  0.012  0.988  0.832  1.0
  B  B6  1  0.244  0.756  0.086  1.0
  B  B7  1  0.244  0.756  0.414  1.0
  B  B8  1  0.255  0.745  0.750  1.0
  B  B9  1  0.758  0.242  0.250  1.0
  B  B10  1  0.645  0.355  0.582  1.0
  B  B11  1  0.645  0.355  0.918  1.0
  O  O12  1  0.345  0.655  0.039  1.0
  O  O13  1  0.338  0.662  0.365  1.0
  O  O14  1  0.353  0.647  0.702  1.0
  O  O15  1  0.345  0.655  0.461  1.0
  O  O16  1  0.338  0.662  0.135  1.0
  O  O17  1  0.353  0.647  0.798  1.0
  O  O18  1  0.661  0.339  0.298  1.0
  O  O19  1  0.683  0.317  0.634  1.0
  O  O20  1  0.680  0.320  0.971  1.0
  O  O21  1  0.680  0.320  0.529  1.0
  O  O22  1  0.661  0.339  0.202  1.0
  O  O23  1  0.683  0.317  0.866  1.0
  O  O24  1  0.028  0.972  0.582  1.0
  O  O25  1  0.028  0.972  0.918  1.0
[/CIF]
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The crystal structure described by Y3B3O7 crystallizes in the orthorhombic Amm2 space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded to one B(1), one O(7), three equivalent O(1), and three equivalent O(6) atoms to form distorted YBO7 hexagonal bipyramids that share  a cornercorner with one Y(2)B2O6 hexagonal bipyramid,  a cornercorner with one Y(3)BO7 hexagonal bipyramid, and edges with six equivalent Y(1)BO7 hexagonal bipyramids. In the second Y site, Y(2) is bonded to one B(1), one B(3), three equivalent O(2), and three equivalent O(4) atoms to form distorted YB2O6 hexagonal bipyramids that share  a cornercorner with one Y(2)B2O6 hexagonal bipyramid,  a cornercorner with one Y(1)BO7 hexagonal bipyramid, and edges with six equivalent Y(2)B2O6 hexagonal bipyramids. In the third Y site, Y(3) is bonded to one B(2), one O(7), three equivalent O(3), and three equivalent O(5) atoms to form a mixture of distorted corner and edge-sharing YBO7 hexagonal bipyramids. There are four inequivalent B sites. In the first B site, B(1) is bonded in a bent 120 degrees geometry to one Y(1), one Y(2), one O(1), and one O(2) atom. In the second B site, B(2) is bonded in a bent 120 degrees geometry to two equivalent Y(3) and two equivalent O(3) atoms. In the third B site, B(3) is bonded in a bent 120 degrees geometry to two equivalent Y(2) and two equivalent O(4) atoms. In the fourth B site, B(4) is bonded in a distorted bent 150 degrees geometry to one O(5), one O(6), and two equivalent O(7) atoms. There are seven inequivalent O sites. In the first O site, O(6) is bonded in a distorted single-bond geometry to three equivalent Y(1) and one B(4) atom. In the second O site, O(7) is bonded in a see-saw-like geometry to one Y(1), one Y(3), and two equivalent B(4) atoms. In the third O site, O(1) is bonded in a 4-coordinate geometry to three equivalent Y(1) and one B(1) atom. In the fourth O site, O(2) is bonded in a 4-coordinate geometry to three equivalent Y(2) and one B(1) atom. In the fifth O site, O(3) is bonded in a 4-coordinate geometry to three equivalent Y(3) and one B(2) atom. In the sixth O site, O(4) is bonded in a 4-coordinate geometry to three equivalent Y(2) and one B(3) atom. In the seventh O site, O(5) is bonded in a distorted single-bond geometry to three equivalent Y(3) and one B(4) atom. is represented by the CIF file [CIF]
data_Y3B3O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.024
_cell_length_b   4.024
_cell_length_c   25.141
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   123.874
_symmetry_Int_Tables_number   1
_cell_volume   337.959
_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
  Y  Y0  1  0.005  0.995  0.005  1.0
  Y  Y1  1  0.999  0.001  0.168  1.0
  Y  Y2  1  0.999  0.001  0.332  1.0
  Y  Y3  1  0.005  0.995  0.495  1.0
  Y  Y4  1  0.012  0.988  0.668  1.0
  Y  Y5  1  0.012  0.988  0.832  1.0
  B  B6  1  0.244  0.756  0.086  1.0
  B  B7  1  0.244  0.756  0.414  1.0
  B  B8  1  0.255  0.745  0.750  1.0
  B  B9  1  0.758  0.242  0.250  1.0
  B  B10  1  0.645  0.355  0.582  1.0
  B  B11  1  0.645  0.355  0.918  1.0
  O  O12  1  0.345  0.655  0.039  1.0
  O  O13  1  0.338  0.662  0.365  1.0
  O  O14  1  0.353  0.647  0.702  1.0
  O  O15  1  0.345  0.655  0.461  1.0
  O  O16  1  0.338  0.662  0.135  1.0
  O  O17  1  0.353  0.647  0.798  1.0
  O  O18  1  0.661  0.339  0.298  1.0
  O  O19  1  0.683  0.317  0.634  1.0
  O  O20  1  0.680  0.320  0.971  1.0
  O  O21  1  0.680  0.320  0.529  1.0
  O  O22  1  0.661  0.339  0.202  1.0
  O  O23  1  0.683  0.317  0.866  1.0
  O  O24  1  0.028  0.972  0.582  1.0
  O  O25  1  0.028  0.972  0.918  1.0
[/CIF]
.