The structure described by Sr2AgCu2AlO7 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 two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to one O(11), one O(14), two equivalent O(1), and two equivalent O(2) atoms to form distorted AgO6 octahedra that share corners with four equivalent Ag(1)O6 octahedra,  a cornercorner with one Cu(2)O5 square pyramid,  a cornercorner with one Cu(3)O5 square pyramid, and edges with four equivalent Ag(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-3°. In the second Ag site, Ag(2) is bonded to one O(12), one O(13), two equivalent O(1), and two equivalent O(2) atoms to form distorted AgO6 octahedra that share corners with four equivalent Ag(2)O6 octahedra,  a cornercorner with one Cu(1)O5 square pyramid,  a cornercorner with one Cu(4)O5 square pyramid, and edges with four equivalent Ag(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. 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  a cornercorner with one Ag(2)O6 octahedra, corners with four equivalent Cu(3)O5 square pyramids, and corners with two equivalent Al(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 1°. 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  a cornercorner with one Ag(1)O6 octahedra, corners with four equivalent Cu(4)O5 square pyramids, and corners with two equivalent Al(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. 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  a cornercorner with one Ag(1)O6 octahedra, corners with four equivalent Cu(1)O5 square pyramids, and corners with two equivalent Al(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. 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  a cornercorner with one Ag(2)O6 octahedra, corners with four equivalent Cu(2)O5 square pyramids, and corners with two equivalent Al(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 4-coordinate geometry to one O(10), one O(5), one O(6), and one O(9) atom. 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 fourteen inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(4), two equivalent Ag(1), and two equivalent Ag(2) atoms to form OSr2Ag4 octahedra that share corners with four equivalent O(1)Sr2Ag4 octahedra, edges with two equivalent O(11)Sr4CuAg octahedra, edges with two equivalent O(12)Sr4CuAg octahedra, edges with two equivalent O(13)Sr4CuAg octahedra, edges with two equivalent O(14)Sr4CuAg octahedra, and edges with four equivalent O(2)Sr2Ag4 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second O site, O(2) is bonded to one Sr(2), one Sr(3), two equivalent Ag(1), and two equivalent Ag(2) atoms to form OSr2Ag4 octahedra that share corners with four equivalent O(2)Sr2Ag4 octahedra, edges with two equivalent O(11)Sr4CuAg octahedra, edges with two equivalent O(12)Sr4CuAg octahedra, edges with two equivalent O(13)Sr4CuAg octahedra, edges with two equivalent O(14)Sr4CuAg octahedra, and edges with four equivalent O(1)Sr2Ag4 octahedra. The corner-sharing octahedral tilt angles range from 1-3°. In the third O site, O(3) is bonded in a 3-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 3-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 3-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 Ag(1), and one Cu(3) atom to form OSr4CuAg octahedra that share  a cornercorner with one O(14)Sr4CuAg octahedra, corners with four equivalent O(11)Sr4CuAg octahedra, edges with two equivalent O(1)Sr2Ag4 octahedra, edges with two equivalent O(2)Sr2Ag4 octahedra, and edges with four equivalent O(13)Sr4CuAg octahedra. The corner-sharing octahedral tilt angles range from 2-13°. In the twelfth O site, O(12) is bonded to two equivalent Sr(2), two equivalent Sr(4), one Ag(2), and one Cu(4) atom to form OSr4CuAg octahedra that share  a cornercorner with one O(13)Sr4CuAg octahedra, corners with four equivalent O(12)Sr4CuAg octahedra, edges with two equivalent O(1)Sr2Ag4 octahedra, edges with two equivalent O(2)Sr2Ag4 octahedra, and edges with four equivalent O(14)Sr4CuAg octahedra. The corner-sharing octahedral tilt angles range from 2-13°. In the thirteenth O site, O(13) is bonded to two equivalent Sr(1), two equivalent Sr(3), one Ag(2), and one Cu(1) atom to form OSr4CuAg octahedra that share  a cornercorner with one O(12)Sr4CuAg octahedra, corners with four equivalent O(13)Sr4CuAg octahedra, edges with two equivalent O(1)Sr2Ag4 octahedra, edges with two equivalent O(2)Sr2Ag4 octahedra, and edges with four equivalent O(11)Sr4CuAg octahedra. The corner-sharing octahedral tilt angles range from 2-13°. In the fourteenth O site, O(14) is bonded to two equivalent Sr(2), two equivalent Sr(4), one Ag(1), and one Cu(2) atom to form OSr4CuAg octahedra that share  a cornercorner with one O(11)Sr4CuAg octahedra, corners with four equivalent O(14)Sr4CuAg octahedra, edges with two equivalent O(1)Sr2Ag4 octahedra, edges with two equivalent O(2)Sr2Ag4 octahedra, and edges with four equivalent O(12)Sr4CuAg octahedra. The corner-sharing octahedral tilt angles range from 2-13°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2AlCu2AgO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.250
_cell_length_b   5.249
_cell_length_c   12.511
_cell_angle_alpha   101.882
_cell_angle_beta   101.871
_cell_angle_gamma   90.087
_symmetry_Int_Tables_number   1
_cell_volume   329.814
_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  0.319  0.350  0.700  1.0
  Sr  Sr1  1  0.621  0.649  0.299  1.0
  Sr  Sr2  1  0.820  0.848  0.700  1.0
  Sr  Sr3  1  0.122  0.153  0.299  1.0
  Al  Al4  1  0.000  0.008  0.999  1.0
  Al  Al5  1  0.485  0.493  0.999  1.0
  Cu  Cu6  1  0.916  0.438  0.880  1.0
  Cu  Cu7  1  0.045  0.566  0.120  1.0
  Cu  Cu8  1  0.420  0.933  0.878  1.0
  Cu  Cu9  1  0.550  0.063  0.121  1.0
  Ag  Ag10  1  0.223  0.762  0.500  1.0
  Ag  Ag11  1  0.723  0.239  0.499  1.0
  O  O12  1  0.211  0.240  0.500  1.0
  O  O13  1  0.708  0.758  0.500  1.0
  O  O14  1  0.243  0.261  0.901  1.0
  O  O15  1  0.357  0.735  0.100  1.0
  O  O16  1  0.747  0.128  0.900  1.0
  O  O17  1  0.862  0.878  0.101  1.0
  O  O18  1  0.597  0.614  0.890  1.0
  O  O19  1  0.718  0.384  0.110  1.0
  O  O20  1  0.100  0.765  0.890  1.0
  O  O21  1  0.220  0.238  0.110  1.0
  O  O22  1  0.308  0.843  0.676  1.0
  O  O23  1  0.635  0.158  0.324  1.0
  O  O24  1  0.808  0.331  0.675  1.0
  O  O25  1  0.134  0.670  0.324  1.0
[/CIF]
.
The structure described by Sr2AgCu2AlO7 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 two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to one O(11), one O(14), two equivalent O(1), and two equivalent O(2) atoms to form distorted AgO6 octahedra that share corners with four equivalent Ag(1)O6 octahedra,  a cornercorner with one Cu(2)O5 square pyramid,  a cornercorner with one Cu(3)O5 square pyramid, and edges with four equivalent Ag(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-3°. In the second Ag site, Ag(2) is bonded to one O(12), one O(13), two equivalent O(1), and two equivalent O(2) atoms to form distorted AgO6 octahedra that share corners with four equivalent Ag(2)O6 octahedra,  a cornercorner with one Cu(1)O5 square pyramid,  a cornercorner with one Cu(4)O5 square pyramid, and edges with four equivalent Ag(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. 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  a cornercorner with one Ag(2)O6 octahedra, corners with four equivalent Cu(3)O5 square pyramids, and corners with two equivalent Al(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 1°. 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  a cornercorner with one Ag(1)O6 octahedra, corners with four equivalent Cu(4)O5 square pyramids, and corners with two equivalent Al(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. 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  a cornercorner with one Ag(1)O6 octahedra, corners with four equivalent Cu(1)O5 square pyramids, and corners with two equivalent Al(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. 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  a cornercorner with one Ag(2)O6 octahedra, corners with four equivalent Cu(2)O5 square pyramids, and corners with two equivalent Al(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 4-coordinate geometry to one O(10), one O(5), one O(6), and one O(9) atom. 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 fourteen inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(4), two equivalent Ag(1), and two equivalent Ag(2) atoms to form OSr2Ag4 octahedra that share corners with four equivalent O(1)Sr2Ag4 octahedra, edges with two equivalent O(11)Sr4CuAg octahedra, edges with two equivalent O(12)Sr4CuAg octahedra, edges with two equivalent O(13)Sr4CuAg octahedra, edges with two equivalent O(14)Sr4CuAg octahedra, and edges with four equivalent O(2)Sr2Ag4 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second O site, O(2) is bonded to one Sr(2), one Sr(3), two equivalent Ag(1), and two equivalent Ag(2) atoms to form OSr2Ag4 octahedra that share corners with four equivalent O(2)Sr2Ag4 octahedra, edges with two equivalent O(11)Sr4CuAg octahedra, edges with two equivalent O(12)Sr4CuAg octahedra, edges with two equivalent O(13)Sr4CuAg octahedra, edges with two equivalent O(14)Sr4CuAg octahedra, and edges with four equivalent O(1)Sr2Ag4 octahedra. The corner-sharing octahedral tilt angles range from 1-3°. In the third O site, O(3) is bonded in a 3-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 3-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 3-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 Ag(1), and one Cu(3) atom to form OSr4CuAg octahedra that share  a cornercorner with one O(14)Sr4CuAg octahedra, corners with four equivalent O(11)Sr4CuAg octahedra, edges with two equivalent O(1)Sr2Ag4 octahedra, edges with two equivalent O(2)Sr2Ag4 octahedra, and edges with four equivalent O(13)Sr4CuAg octahedra. The corner-sharing octahedral tilt angles range from 2-13°. In the twelfth O site, O(12) is bonded to two equivalent Sr(2), two equivalent Sr(4), one Ag(2), and one Cu(4) atom to form OSr4CuAg octahedra that share  a cornercorner with one O(13)Sr4CuAg octahedra, corners with four equivalent O(12)Sr4CuAg octahedra, edges with two equivalent O(1)Sr2Ag4 octahedra, edges with two equivalent O(2)Sr2Ag4 octahedra, and edges with four equivalent O(14)Sr4CuAg octahedra. The corner-sharing octahedral tilt angles range from 2-13°. In the thirteenth O site, O(13) is bonded to two equivalent Sr(1), two equivalent Sr(3), one Ag(2), and one Cu(1) atom to form OSr4CuAg octahedra that share  a cornercorner with one O(12)Sr4CuAg octahedra, corners with four equivalent O(13)Sr4CuAg octahedra, edges with two equivalent O(1)Sr2Ag4 octahedra, edges with two equivalent O(2)Sr2Ag4 octahedra, and edges with four equivalent O(11)Sr4CuAg octahedra. The corner-sharing octahedral tilt angles range from 2-13°. In the fourteenth O site, O(14) is bonded to two equivalent Sr(2), two equivalent Sr(4), one Ag(1), and one Cu(2) atom to form OSr4CuAg octahedra that share  a cornercorner with one O(11)Sr4CuAg octahedra, corners with four equivalent O(14)Sr4CuAg octahedra, edges with two equivalent O(1)Sr2Ag4 octahedra, edges with two equivalent O(2)Sr2Ag4 octahedra, and edges with four equivalent O(12)Sr4CuAg octahedra. The corner-sharing octahedral tilt angles range from 2-13°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2AlCu2AgO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.250
_cell_length_b   5.249
_cell_length_c   12.511
_cell_angle_alpha   101.882
_cell_angle_beta   101.871
_cell_angle_gamma   90.087
_symmetry_Int_Tables_number   1
_cell_volume   329.814
_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  0.319  0.350  0.700  1.0
  Sr  Sr1  1  0.621  0.649  0.299  1.0
  Sr  Sr2  1  0.820  0.848  0.700  1.0
  Sr  Sr3  1  0.122  0.153  0.299  1.0
  Al  Al4  1  0.000  0.008  0.999  1.0
  Al  Al5  1  0.485  0.493  0.999  1.0
  Cu  Cu6  1  0.916  0.438  0.880  1.0
  Cu  Cu7  1  0.045  0.566  0.120  1.0
  Cu  Cu8  1  0.420  0.933  0.878  1.0
  Cu  Cu9  1  0.550  0.063  0.121  1.0
  Ag  Ag10  1  0.223  0.762  0.500  1.0
  Ag  Ag11  1  0.723  0.239  0.499  1.0
  O  O12  1  0.211  0.240  0.500  1.0
  O  O13  1  0.708  0.758  0.500  1.0
  O  O14  1  0.243  0.261  0.901  1.0
  O  O15  1  0.357  0.735  0.100  1.0
  O  O16  1  0.747  0.128  0.900  1.0
  O  O17  1  0.862  0.878  0.101  1.0
  O  O18  1  0.597  0.614  0.890  1.0
  O  O19  1  0.718  0.384  0.110  1.0
  O  O20  1  0.100  0.765  0.890  1.0
  O  O21  1  0.220  0.238  0.110  1.0
  O  O22  1  0.308  0.843  0.676  1.0
  O  O23  1  0.635  0.158  0.324  1.0
  O  O24  1  0.808  0.331  0.675  1.0
  O  O25  1  0.134  0.670  0.324  1.0
[/CIF]
.