The crystal structure described by Y2Ba4Cu7O15 crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(7), and four equivalent O(4) atoms. In the second Ba site, Ba(2) is bonded in a 10-coordinate geometry to two equivalent O(3), two equivalent O(5), two equivalent O(8), and four equivalent O(6) atoms. Y(1) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(3), two equivalent O(5), and two equivalent O(7) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(6), two equivalent O(3), and two equivalent O(5) atoms to form corner-sharing CuO5 square pyramids. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to one O(4) and three equivalent O(1) atoms. In the third Cu site, Cu(3) is bonded to one O(4), two equivalent O(2), and two equivalent O(7) atoms to form corner-sharing CuO5 square pyramids. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to two equivalent O(6) and two equivalent O(8) atoms. There are eight inequivalent O sites. In the first O site, O(4) is bonded to four equivalent Ba(1), one Cu(2), and one Cu(3) atom to form a mixture of distorted edge and corner-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 11°. In the second O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ba(2), two equivalent Y(1), and two equivalent Cu(1) atoms. In the third O site, O(6) is bonded to four equivalent Ba(2), one Cu(1), and one Cu(4) atom to form a mixture of distorted edge, face, and corner-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the fourth O site, O(7) is bonded in a 4-coordinate geometry to two equivalent Ba(1), two equivalent Y(1), and two equivalent Cu(3) atoms. In the fifth O site, O(8) is bonded to four equivalent Ba(2) and two equivalent Cu(4) atoms to form a mixture of distorted edge, face, and corner-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the sixth O site, O(1) is bonded in a distorted T-shaped geometry to two equivalent Ba(1) and three equivalent Cu(2) atoms. In the seventh O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Y(1), and two equivalent Cu(3) atoms. In the eighth O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Ba(2), two equivalent Y(1), and two equivalent Cu(1) atoms. is represented by the CIF file [CIF]
data_Ba4Y2Cu7O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   25.683
_cell_length_b   25.683
_cell_length_c   3.913
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   171.327
_symmetry_Int_Tables_number   1
_cell_volume   389.182
_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  0.311  0.689  0.500  1.0
  Ba  Ba1  1  0.689  0.311  0.500  1.0
  Ba  Ba2  1  0.458  0.542  0.500  1.0
  Ba  Ba3  1  0.542  0.458  0.500  1.0
  Y  Y4  1  0.385  0.615  0.500  1.0
  Y  Y5  1  0.615  0.385  0.500  1.0
  Cu  Cu6  1  0.918  0.082  0.000  1.0
  Cu  Cu7  1  0.082  0.918  0.000  1.0
  Cu  Cu8  1  0.770  0.230  0.000  1.0
  Cu  Cu9  1  0.230  0.770  0.000  1.0
  Cu  Cu10  1  0.851  0.149  0.000  1.0
  Cu  Cu11  1  0.149  0.851  0.000  1.0
  Cu  Cu12  1  0.000  0.000  0.000  1.0
  O  O13  1  0.267  0.733  0.000  1.0
  O  O14  1  0.733  0.267  0.000  1.0
  O  O15  1  0.856  0.144  0.500  1.0
  O  O16  1  0.144  0.856  0.500  1.0
  O  O17  1  0.413  0.587  0.000  1.0
  O  O18  1  0.587  0.413  0.000  1.0
  O  O19  1  0.806  0.194  0.000  1.0
  O  O20  1  0.194  0.806  0.000  1.0
  O  O21  1  0.912  0.088  0.500  1.0
  O  O22  1  0.088  0.912  0.500  1.0
  O  O23  1  0.963  0.037  0.000  1.0
  O  O24  1  0.037  0.963  0.000  1.0
  O  O25  1  0.357  0.643  0.000  1.0
  O  O26  1  0.643  0.357  0.000  1.0
  O  O27  1  0.000  0.000  0.500  1.0
[/CIF]
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The crystal structure described by Y2Ba4Cu7O15 crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(7), and four equivalent O(4) atoms. In the second Ba site, Ba(2) is bonded in a 10-coordinate geometry to two equivalent O(3), two equivalent O(5), two equivalent O(8), and four equivalent O(6) atoms. Y(1) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(3), two equivalent O(5), and two equivalent O(7) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(6), two equivalent O(3), and two equivalent O(5) atoms to form corner-sharing CuO5 square pyramids. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to one O(4) and three equivalent O(1) atoms. In the third Cu site, Cu(3) is bonded to one O(4), two equivalent O(2), and two equivalent O(7) atoms to form corner-sharing CuO5 square pyramids. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to two equivalent O(6) and two equivalent O(8) atoms. There are eight inequivalent O sites. In the first O site, O(4) is bonded to four equivalent Ba(1), one Cu(2), and one Cu(3) atom to form a mixture of distorted edge and corner-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 11°. In the second O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ba(2), two equivalent Y(1), and two equivalent Cu(1) atoms. In the third O site, O(6) is bonded to four equivalent Ba(2), one Cu(1), and one Cu(4) atom to form a mixture of distorted edge, face, and corner-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the fourth O site, O(7) is bonded in a 4-coordinate geometry to two equivalent Ba(1), two equivalent Y(1), and two equivalent Cu(3) atoms. In the fifth O site, O(8) is bonded to four equivalent Ba(2) and two equivalent Cu(4) atoms to form a mixture of distorted edge, face, and corner-sharing OBa4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the sixth O site, O(1) is bonded in a distorted T-shaped geometry to two equivalent Ba(1) and three equivalent Cu(2) atoms. In the seventh O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Y(1), and two equivalent Cu(3) atoms. In the eighth O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Ba(2), two equivalent Y(1), and two equivalent Cu(1) atoms. is represented by the CIF file [CIF]
data_Ba4Y2Cu7O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   25.683
_cell_length_b   25.683
_cell_length_c   3.913
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   171.327
_symmetry_Int_Tables_number   1
_cell_volume   389.182
_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  0.311  0.689  0.500  1.0
  Ba  Ba1  1  0.689  0.311  0.500  1.0
  Ba  Ba2  1  0.458  0.542  0.500  1.0
  Ba  Ba3  1  0.542  0.458  0.500  1.0
  Y  Y4  1  0.385  0.615  0.500  1.0
  Y  Y5  1  0.615  0.385  0.500  1.0
  Cu  Cu6  1  0.918  0.082  0.000  1.0
  Cu  Cu7  1  0.082  0.918  0.000  1.0
  Cu  Cu8  1  0.770  0.230  0.000  1.0
  Cu  Cu9  1  0.230  0.770  0.000  1.0
  Cu  Cu10  1  0.851  0.149  0.000  1.0
  Cu  Cu11  1  0.149  0.851  0.000  1.0
  Cu  Cu12  1  0.000  0.000  0.000  1.0
  O  O13  1  0.267  0.733  0.000  1.0
  O  O14  1  0.733  0.267  0.000  1.0
  O  O15  1  0.856  0.144  0.500  1.0
  O  O16  1  0.144  0.856  0.500  1.0
  O  O17  1  0.413  0.587  0.000  1.0
  O  O18  1  0.587  0.413  0.000  1.0
  O  O19  1  0.806  0.194  0.000  1.0
  O  O20  1  0.194  0.806  0.000  1.0
  O  O21  1  0.912  0.088  0.500  1.0
  O  O22  1  0.088  0.912  0.500  1.0
  O  O23  1  0.963  0.037  0.000  1.0
  O  O24  1  0.037  0.963  0.000  1.0
  O  O25  1  0.357  0.643  0.000  1.0
  O  O26  1  0.643  0.357  0.000  1.0
  O  O27  1  0.000  0.000  0.500  1.0
[/CIF]
.