The material structure described by Sr2Cu2AlSbO7 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(7), two equivalent O(11), and two equivalent O(13) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(2), one O(4), one O(8), two equivalent O(12), and two equivalent O(14) atoms. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one O(2), one O(5), one O(9), two equivalent O(11), and two equivalent O(13) atoms. In the fourth Sr site, Sr(4) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(6), two equivalent O(12), and two equivalent O(14) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(13), one O(3), one O(5), one O(7), and one O(9) atom to form distorted CuO5 square pyramids that share corners with four equivalent Cu(3)O5 square pyramids, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. In the second Cu site, Cu(2) is bonded to one O(10), one O(14), one O(4), one O(6), and one O(8) atom to form distorted CuO5 square pyramids that share corners with four equivalent Cu(4)O5 square pyramids, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. In the third Cu site, Cu(3) is bonded to one O(11), one O(3), one O(5), one O(7), and one O(9) atom to form distorted CuO5 square pyramids that share corners with four equivalent Cu(1)O5 square pyramids, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. In the fourth Cu site, Cu(4) is bonded to one O(10), one O(12), one O(4), one O(6), and one O(8) atom to form distorted CuO5 square pyramids that share corners with four equivalent Cu(2)O5 square pyramids, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(10), one O(5), one O(6), and one O(9) atom to form distorted AlO4 tetrahedra that share corners with two equivalent Cu(1)O5 square pyramids, corners with two equivalent Cu(2)O5 square pyramids, corners with two equivalent Cu(3)O5 square pyramids, and corners with two equivalent Cu(4)O5 square pyramids. In the second Al site, Al(2) is bonded to one O(3), one O(4), one O(7), and one O(8) atom to form distorted AlO4 tetrahedra that share corners with two equivalent Cu(1)O5 square pyramids, corners with two equivalent Cu(2)O5 square pyramids, corners with two equivalent Cu(3)O5 square pyramids, and corners with two equivalent Cu(4)O5 square pyramids. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(11), one O(14), and one O(2) atom. In the second Sb site, Sb(2) is bonded in a rectangular see-saw-like geometry to one O(1), one O(12), one O(13), and one O(2) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(4), one Sb(1), and one Sb(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(3), one Sb(1), and one Sb(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), one Cu(1), one Cu(3), and one Al(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(2), one Cu(2), one Cu(4), and one Al(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(3), one Cu(1), one Cu(3), and one Al(1) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(4), one Cu(2), one Cu(4), and one Al(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(1), one Cu(1), one Cu(3), and one Al(2) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Sr(2), one Cu(2), one Cu(4), and one Al(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Sr(3), one Cu(1), one Cu(3), and one Al(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Sr(4), one Cu(2), one Cu(4), and one Al(1) atom. In the eleventh O site, O(11) is bonded to two equivalent Sr(1), two equivalent Sr(3), one Cu(3), and one Sb(1) atom to form a mixture of distorted corner and edge-sharing OSr4CuSb octahedra. The corner-sharing octahedral tilt angles range from 2-20°. In the twelfth O site, O(12) is bonded to two equivalent Sr(2), two equivalent Sr(4), one Cu(4), and one Sb(2) atom to form a mixture of distorted corner and edge-sharing OSr4CuSb octahedra. The corner-sharing octahedral tilt angles range from 1-20°. In the thirteenth O site, O(13) is bonded to two equivalent Sr(1), two equivalent Sr(3), one Cu(1), and one Sb(2) atom to form a mixture of distorted corner and edge-sharing OSr4CuSb octahedra. The corner-sharing octahedral tilt angles range from 1-20°. In the fourteenth O site, O(14) is bonded to two equivalent Sr(2), two equivalent Sr(4), one Cu(2), and one Sb(1) atom to form a mixture of distorted corner and edge-sharing OSr4CuSb octahedra. The corner-sharing octahedral tilt angles range from 2-20°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2AlCu2SbO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.313
_cell_length_b   5.342
_cell_length_c   12.686
_cell_angle_alpha   102.134
_cell_angle_beta   102.070
_cell_angle_gamma   90.002
_symmetry_Int_Tables_number   1
_cell_volume   343.851
_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
  Sr  Sr0  1  0.338  0.364  0.717  1.0
  Sr  Sr1  1  0.622  0.640  0.284  1.0
  Sr  Sr2  1  0.838  0.855  0.717  1.0
  Sr  Sr3  1  0.122  0.148  0.284  1.0
  Al  Al4  1  0.990  0.999  0.001  1.0
  Al  Al5  1  0.486  0.498  0.001  1.0
  Cu  Cu6  1  0.930  0.442  0.888  1.0
  Cu  Cu7  1  0.043  0.557  0.113  1.0
  Cu  Cu8  1  0.430  0.942  0.888  1.0
  Cu  Cu9  1  0.545  0.057  0.114  1.0
  Sb  Sb10  1  0.240  0.748  0.501  1.0
  Sb  Sb11  1  0.740  0.255  0.501  1.0
  O  O12  1  0.107  0.385  0.501  1.0
  O  O13  1  0.607  0.619  0.501  1.0
  O  O14  1  0.257  0.269  0.897  1.0
  O  O15  1  0.361  0.729  0.104  1.0
  O  O16  1  0.758  0.124  0.898  1.0
  O  O17  1  0.864  0.876  0.105  1.0
  O  O18  1  0.610  0.623  0.897  1.0
  O  O19  1  0.715  0.377  0.106  1.0
  O  O20  1  0.110  0.770  0.896  1.0
  O  O21  1  0.216  0.230  0.105  1.0
  O  O22  1  0.331  0.831  0.678  1.0
  O  O23  1  0.653  0.171  0.323  1.0
  O  O24  1  0.830  0.348  0.678  1.0
  O  O25  1  0.154  0.655  0.323  1.0
[/CIF]
.
The material structure described by Sr2Cu2AlSbO7 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(7), two equivalent O(11), and two equivalent O(13) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(2), one O(4), one O(8), two equivalent O(12), and two equivalent O(14) atoms. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one O(2), one O(5), one O(9), two equivalent O(11), and two equivalent O(13) atoms. In the fourth Sr site, Sr(4) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(6), two equivalent O(12), and two equivalent O(14) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(13), one O(3), one O(5), one O(7), and one O(9) atom to form distorted CuO5 square pyramids that share corners with four equivalent Cu(3)O5 square pyramids, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. In the second Cu site, Cu(2) is bonded to one O(10), one O(14), one O(4), one O(6), and one O(8) atom to form distorted CuO5 square pyramids that share corners with four equivalent Cu(4)O5 square pyramids, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. In the third Cu site, Cu(3) is bonded to one O(11), one O(3), one O(5), one O(7), and one O(9) atom to form distorted CuO5 square pyramids that share corners with four equivalent Cu(1)O5 square pyramids, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. In the fourth Cu site, Cu(4) is bonded to one O(10), one O(12), one O(4), one O(6), and one O(8) atom to form distorted CuO5 square pyramids that share corners with four equivalent Cu(2)O5 square pyramids, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(10), one O(5), one O(6), and one O(9) atom to form distorted AlO4 tetrahedra that share corners with two equivalent Cu(1)O5 square pyramids, corners with two equivalent Cu(2)O5 square pyramids, corners with two equivalent Cu(3)O5 square pyramids, and corners with two equivalent Cu(4)O5 square pyramids. In the second Al site, Al(2) is bonded to one O(3), one O(4), one O(7), and one O(8) atom to form distorted AlO4 tetrahedra that share corners with two equivalent Cu(1)O5 square pyramids, corners with two equivalent Cu(2)O5 square pyramids, corners with two equivalent Cu(3)O5 square pyramids, and corners with two equivalent Cu(4)O5 square pyramids. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(11), one O(14), and one O(2) atom. In the second Sb site, Sb(2) is bonded in a rectangular see-saw-like geometry to one O(1), one O(12), one O(13), and one O(2) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(4), one Sb(1), and one Sb(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(3), one Sb(1), and one Sb(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), one Cu(1), one Cu(3), and one Al(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(2), one Cu(2), one Cu(4), and one Al(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(3), one Cu(1), one Cu(3), and one Al(1) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(4), one Cu(2), one Cu(4), and one Al(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(1), one Cu(1), one Cu(3), and one Al(2) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Sr(2), one Cu(2), one Cu(4), and one Al(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Sr(3), one Cu(1), one Cu(3), and one Al(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Sr(4), one Cu(2), one Cu(4), and one Al(1) atom. In the eleventh O site, O(11) is bonded to two equivalent Sr(1), two equivalent Sr(3), one Cu(3), and one Sb(1) atom to form a mixture of distorted corner and edge-sharing OSr4CuSb octahedra. The corner-sharing octahedral tilt angles range from 2-20°. In the twelfth O site, O(12) is bonded to two equivalent Sr(2), two equivalent Sr(4), one Cu(4), and one Sb(2) atom to form a mixture of distorted corner and edge-sharing OSr4CuSb octahedra. The corner-sharing octahedral tilt angles range from 1-20°. In the thirteenth O site, O(13) is bonded to two equivalent Sr(1), two equivalent Sr(3), one Cu(1), and one Sb(2) atom to form a mixture of distorted corner and edge-sharing OSr4CuSb octahedra. The corner-sharing octahedral tilt angles range from 1-20°. In the fourteenth O site, O(14) is bonded to two equivalent Sr(2), two equivalent Sr(4), one Cu(2), and one Sb(1) atom to form a mixture of distorted corner and edge-sharing OSr4CuSb octahedra. The corner-sharing octahedral tilt angles range from 2-20°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2AlCu2SbO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.313
_cell_length_b   5.342
_cell_length_c   12.686
_cell_angle_alpha   102.134
_cell_angle_beta   102.070
_cell_angle_gamma   90.002
_symmetry_Int_Tables_number   1
_cell_volume   343.851
_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
  Sr  Sr0  1  0.338  0.364  0.717  1.0
  Sr  Sr1  1  0.622  0.640  0.284  1.0
  Sr  Sr2  1  0.838  0.855  0.717  1.0
  Sr  Sr3  1  0.122  0.148  0.284  1.0
  Al  Al4  1  0.990  0.999  0.001  1.0
  Al  Al5  1  0.486  0.498  0.001  1.0
  Cu  Cu6  1  0.930  0.442  0.888  1.0
  Cu  Cu7  1  0.043  0.557  0.113  1.0
  Cu  Cu8  1  0.430  0.942  0.888  1.0
  Cu  Cu9  1  0.545  0.057  0.114  1.0
  Sb  Sb10  1  0.240  0.748  0.501  1.0
  Sb  Sb11  1  0.740  0.255  0.501  1.0
  O  O12  1  0.107  0.385  0.501  1.0
  O  O13  1  0.607  0.619  0.501  1.0
  O  O14  1  0.257  0.269  0.897  1.0
  O  O15  1  0.361  0.729  0.104  1.0
  O  O16  1  0.758  0.124  0.898  1.0
  O  O17  1  0.864  0.876  0.105  1.0
  O  O18  1  0.610  0.623  0.897  1.0
  O  O19  1  0.715  0.377  0.106  1.0
  O  O20  1  0.110  0.770  0.896  1.0
  O  O21  1  0.216  0.230  0.105  1.0
  O  O22  1  0.331  0.831  0.678  1.0
  O  O23  1  0.653  0.171  0.323  1.0
  O  O24  1  0.830  0.348  0.678  1.0
  O  O25  1  0.154  0.655  0.323  1.0
[/CIF]
.