The compound described by SrNd3CuAlO8 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(13), one O(4), one O(5), one O(6), one O(8), and one O(9) atom to form distorted SrO6 pentagonal pyramids that share  a cornercorner with one Cu(1)O4 trigonal pyramid,  an edgeedge with one Nd(6)O6 pentagonal pyramid,  an edgeedge with one Al(2)O4 tetrahedra, and  an edgeedge with one Cu(1)O4 trigonal pyramid. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(13), one O(5), and one O(7) atom. There are six inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 5-coordinate geometry to one O(12), one O(15), one O(3), one O(5), and one O(8) atom. In the second Nd site, Nd(2) is bonded in a 6-coordinate geometry to one O(10), one O(15), one O(16), one O(2), one O(4), and one O(7) atom. In the third Nd site, Nd(3) is bonded in a 7-coordinate geometry to one O(11), one O(12), one O(15), one O(2), one O(7), one O(8), and one O(9) atom. In the fourth Nd site, Nd(4) is bonded in a 6-coordinate geometry to one O(10), one O(12), one O(13), one O(14), one O(16), and one O(2) atom. In the fifth Nd site, Nd(5) is bonded in a 6-coordinate geometry to one O(1), one O(14), one O(15), one O(3), one O(4), and one O(5) atom. In the sixth Nd site, Nd(6) is bonded to one O(11), one O(13), one O(14), one O(2), one O(3), and one O(6) atom to form distorted NdO6 pentagonal pyramids that share corners with two equivalent Al(1)O4 tetrahedra,  a cornercorner with one Cu(1)O4 trigonal pyramid,  an edgeedge with one Sr(1)O6 pentagonal pyramid, and  an edgeedge with one Al(2)O4 tetrahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(6), one O(7), one O(8), and one O(9) atom to form distorted CuO4 trigonal pyramids that share  a cornercorner with one Sr(1)O6 pentagonal pyramid,  a cornercorner with one Nd(6)O6 pentagonal pyramid,  a cornercorner with one Al(2)O4 tetrahedra, and  an edgeedge with one Sr(1)O6 pentagonal pyramid. In the second Cu site, Cu(2) is bonded in a distorted see-saw-like geometry to one O(1), one O(10), one O(7), and one O(9) atom. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(11), one O(12), and one O(14) atom to form AlO4 tetrahedra that share corners with two equivalent Nd(6)O6 pentagonal pyramids. In the second Al site, Al(2) is bonded to one O(16), one O(3), one O(4), and one O(6) atom to form AlO4 tetrahedra that share  a cornercorner with one Cu(1)O4 trigonal pyramid,  an edgeedge with one Sr(1)O6 pentagonal pyramid, and  an edgeedge with one Nd(6)O6 pentagonal pyramid. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sr(2), one Nd(5), one Cu(2), and one Al(1) atom. In the second O site, O(2) is bonded to one Nd(2), one Nd(3), one Nd(4), and one Nd(6) atom to form ONd4 tetrahedra that share corners with two equivalent O(13)Sr2Nd2 tetrahedra,  a cornercorner with one O(3)Nd3Al trigonal pyramid,  a cornercorner with one O(8)SrNd2Cu trigonal pyramid,  an edgeedge with one O(12)Nd3Al tetrahedra, and  an edgeedge with one O(15)Nd4 tetrahedra. In the third O site, O(3) is bonded to one Nd(1), one Nd(5), one Nd(6), and one Al(2) atom to form distorted ONd3Al trigonal pyramids that share  a cornercorner with one O(12)Nd3Al tetrahedra,  a cornercorner with one O(2)Nd4 tetrahedra,  a cornercorner with one O(13)Sr2Nd2 tetrahedra, corners with two equivalent O(15)Nd4 tetrahedra,  a cornercorner with one O(8)SrNd2Cu trigonal pyramid, and  an edgeedge with one O(5)Sr2Nd2 tetrahedra. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), one Nd(2), one Nd(5), and one Al(2) atom. In the fifth O site, O(5) is bonded to one Sr(1), one Sr(2), one Nd(1), and one Nd(5) atom to form distorted OSr2Nd2 tetrahedra that share  a cornercorner with one O(12)Nd3Al tetrahedra, corners with two equivalent O(15)Nd4 tetrahedra, corners with two equivalent O(8)SrNd2Cu trigonal pyramids,  an edgeedge with one O(13)Sr2Nd2 tetrahedra, and  an edgeedge with one O(3)Nd3Al trigonal pyramid. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Sr(1), one Nd(6), one Cu(1), and one Al(2) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Sr(2), one Nd(2), one Nd(3), one Cu(1), and one Cu(2) atom. In the eighth O site, O(8) is bonded to one Sr(1), one Nd(1), one Nd(3), and one Cu(1) atom to form distorted OSrNd2Cu trigonal pyramids that share  a cornercorner with one O(2)Nd4 tetrahedra,  a cornercorner with one O(13)Sr2Nd2 tetrahedra, corners with two equivalent O(12)Nd3Al tetrahedra, corners with two equivalent O(5)Sr2Nd2 tetrahedra,  a cornercorner with one O(3)Nd3Al trigonal pyramid, and  an edgeedge with one O(15)Nd4 tetrahedra. In the ninth O site, O(9) is bonded in a distorted see-saw-like geometry to one Sr(1), one Nd(3), one Cu(1), and one Cu(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Sr(2), one Nd(2), one Nd(4), and one Cu(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Sr(2), one Nd(3), one Nd(6), and one Al(1) atom. In the twelfth O site, O(12) is bonded to one Nd(1), one Nd(3), one Nd(4), and one Al(1) atom to form distorted ONd3Al tetrahedra that share  a cornercorner with one O(13)Sr2Nd2 tetrahedra,  a cornercorner with one O(5)Sr2Nd2 tetrahedra, corners with two equivalent O(15)Nd4 tetrahedra,  a cornercorner with one O(3)Nd3Al trigonal pyramid, corners with two equivalent O(8)SrNd2Cu trigonal pyramids, and  an edgeedge with one O(2)Nd4 tetrahedra. In the thirteenth O site, O(13) is bonded to one Sr(1), one Sr(2), one Nd(4), and one Nd(6) atom to form OSr2Nd2 tetrahedra that share  a cornercorner with one O(12)Nd3Al tetrahedra, corners with two equivalent O(2)Nd4 tetrahedra,  a cornercorner with one O(3)Nd3Al trigonal pyramid,  a cornercorner with one O(8)SrNd2Cu trigonal pyramid, and  an edgeedge with one O(5)Sr2Nd2 tetrahedra. In the fourteenth O site, O(14) is bonded in a distorted see-saw-like geometry to one Nd(4), one Nd(5), one Nd(6), and one Al(1) atom. In the fifteenth O site, O(15) is bonded to one Nd(1), one Nd(2), one Nd(3), and one Nd(5) atom to form ONd4 tetrahedra that share corners with two equivalent O(12)Nd3Al tetrahedra, corners with two equivalent O(5)Sr2Nd2 tetrahedra, corners with two equivalent O(3)Nd3Al trigonal pyramids,  an edgeedge with one O(2)Nd4 tetrahedra, and  an edgeedge with one O(8)SrNd2Cu trigonal pyramid. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Nd(2), one Nd(4), and one Al(2) atom. is represented by the CIF file [CIF]
data_SrNd3AlCuO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.018
_cell_length_b   8.944
_cell_length_c   9.125
_cell_angle_alpha   108.530
_cell_angle_beta   103.735
_cell_angle_gamma   92.722
_symmetry_Int_Tables_number   1
_cell_volume   448.325
_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  0.451  0.812  0.547  1.0
  Sr  Sr1  1  0.075  0.916  0.209  1.0
  Nd  Nd2  1  0.090  0.191  0.670  1.0
  Nd  Nd3  1  0.801  0.580  0.857  1.0
  Nd  Nd4  1  0.711  0.161  0.894  1.0
  Nd  Nd5  1  0.414  0.542  0.080  1.0
  Nd  Nd6  1  0.480  0.274  0.465  1.0
  Nd  Nd7  1  0.959  0.473  0.289  1.0
  Al  Al8  1  0.318  0.205  0.101  1.0
  Al  Al9  1  0.210  0.545  0.648  1.0
  Cu  Cu10  1  0.053  0.883  0.772  1.0
  Cu  Cu11  1  0.556  0.886  0.991  1.0
  O  O12  1  0.420  0.043  0.156  1.0
  O  O13  1  0.762  0.441  0.027  1.0
  O  O14  1  0.111  0.350  0.499  1.0
  O  O15  1  0.501  0.558  0.638  1.0
  O  O16  1  0.284  0.055  0.491  1.0
  O  O17  1  0.052  0.668  0.561  1.0
  O  O18  1  0.844  0.873  0.912  1.0
  O  O19  1  0.831  0.998  0.672  1.0
  O  O20  1  0.385  0.944  0.820  1.0
  O  O21  1  0.677  0.748  0.098  1.0
  O  O22  1  0.039  0.224  0.133  1.0
  O  O23  1  0.325  0.255  0.928  1.0
  O  O24  1  0.210  0.663  0.256  1.0
  O  O25  1  0.524  0.375  0.254  1.0
  O  O26  1  0.741  0.299  0.698  1.0
  O  O27  1  0.177  0.536  0.833  1.0
[/CIF]
.
The compound described by SrNd3CuAlO8 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(13), one O(4), one O(5), one O(6), one O(8), and one O(9) atom to form distorted SrO6 pentagonal pyramids that share  a cornercorner with one Cu(1)O4 trigonal pyramid,  an edgeedge with one Nd(6)O6 pentagonal pyramid,  an edgeedge with one Al(2)O4 tetrahedra, and  an edgeedge with one Cu(1)O4 trigonal pyramid. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(13), one O(5), and one O(7) atom. There are six inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 5-coordinate geometry to one O(12), one O(15), one O(3), one O(5), and one O(8) atom. In the second Nd site, Nd(2) is bonded in a 6-coordinate geometry to one O(10), one O(15), one O(16), one O(2), one O(4), and one O(7) atom. In the third Nd site, Nd(3) is bonded in a 7-coordinate geometry to one O(11), one O(12), one O(15), one O(2), one O(7), one O(8), and one O(9) atom. In the fourth Nd site, Nd(4) is bonded in a 6-coordinate geometry to one O(10), one O(12), one O(13), one O(14), one O(16), and one O(2) atom. In the fifth Nd site, Nd(5) is bonded in a 6-coordinate geometry to one O(1), one O(14), one O(15), one O(3), one O(4), and one O(5) atom. In the sixth Nd site, Nd(6) is bonded to one O(11), one O(13), one O(14), one O(2), one O(3), and one O(6) atom to form distorted NdO6 pentagonal pyramids that share corners with two equivalent Al(1)O4 tetrahedra,  a cornercorner with one Cu(1)O4 trigonal pyramid,  an edgeedge with one Sr(1)O6 pentagonal pyramid, and  an edgeedge with one Al(2)O4 tetrahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(6), one O(7), one O(8), and one O(9) atom to form distorted CuO4 trigonal pyramids that share  a cornercorner with one Sr(1)O6 pentagonal pyramid,  a cornercorner with one Nd(6)O6 pentagonal pyramid,  a cornercorner with one Al(2)O4 tetrahedra, and  an edgeedge with one Sr(1)O6 pentagonal pyramid. In the second Cu site, Cu(2) is bonded in a distorted see-saw-like geometry to one O(1), one O(10), one O(7), and one O(9) atom. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(11), one O(12), and one O(14) atom to form AlO4 tetrahedra that share corners with two equivalent Nd(6)O6 pentagonal pyramids. In the second Al site, Al(2) is bonded to one O(16), one O(3), one O(4), and one O(6) atom to form AlO4 tetrahedra that share  a cornercorner with one Cu(1)O4 trigonal pyramid,  an edgeedge with one Sr(1)O6 pentagonal pyramid, and  an edgeedge with one Nd(6)O6 pentagonal pyramid. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sr(2), one Nd(5), one Cu(2), and one Al(1) atom. In the second O site, O(2) is bonded to one Nd(2), one Nd(3), one Nd(4), and one Nd(6) atom to form ONd4 tetrahedra that share corners with two equivalent O(13)Sr2Nd2 tetrahedra,  a cornercorner with one O(3)Nd3Al trigonal pyramid,  a cornercorner with one O(8)SrNd2Cu trigonal pyramid,  an edgeedge with one O(12)Nd3Al tetrahedra, and  an edgeedge with one O(15)Nd4 tetrahedra. In the third O site, O(3) is bonded to one Nd(1), one Nd(5), one Nd(6), and one Al(2) atom to form distorted ONd3Al trigonal pyramids that share  a cornercorner with one O(12)Nd3Al tetrahedra,  a cornercorner with one O(2)Nd4 tetrahedra,  a cornercorner with one O(13)Sr2Nd2 tetrahedra, corners with two equivalent O(15)Nd4 tetrahedra,  a cornercorner with one O(8)SrNd2Cu trigonal pyramid, and  an edgeedge with one O(5)Sr2Nd2 tetrahedra. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), one Nd(2), one Nd(5), and one Al(2) atom. In the fifth O site, O(5) is bonded to one Sr(1), one Sr(2), one Nd(1), and one Nd(5) atom to form distorted OSr2Nd2 tetrahedra that share  a cornercorner with one O(12)Nd3Al tetrahedra, corners with two equivalent O(15)Nd4 tetrahedra, corners with two equivalent O(8)SrNd2Cu trigonal pyramids,  an edgeedge with one O(13)Sr2Nd2 tetrahedra, and  an edgeedge with one O(3)Nd3Al trigonal pyramid. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Sr(1), one Nd(6), one Cu(1), and one Al(2) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Sr(2), one Nd(2), one Nd(3), one Cu(1), and one Cu(2) atom. In the eighth O site, O(8) is bonded to one Sr(1), one Nd(1), one Nd(3), and one Cu(1) atom to form distorted OSrNd2Cu trigonal pyramids that share  a cornercorner with one O(2)Nd4 tetrahedra,  a cornercorner with one O(13)Sr2Nd2 tetrahedra, corners with two equivalent O(12)Nd3Al tetrahedra, corners with two equivalent O(5)Sr2Nd2 tetrahedra,  a cornercorner with one O(3)Nd3Al trigonal pyramid, and  an edgeedge with one O(15)Nd4 tetrahedra. In the ninth O site, O(9) is bonded in a distorted see-saw-like geometry to one Sr(1), one Nd(3), one Cu(1), and one Cu(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Sr(2), one Nd(2), one Nd(4), and one Cu(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Sr(2), one Nd(3), one Nd(6), and one Al(1) atom. In the twelfth O site, O(12) is bonded to one Nd(1), one Nd(3), one Nd(4), and one Al(1) atom to form distorted ONd3Al tetrahedra that share  a cornercorner with one O(13)Sr2Nd2 tetrahedra,  a cornercorner with one O(5)Sr2Nd2 tetrahedra, corners with two equivalent O(15)Nd4 tetrahedra,  a cornercorner with one O(3)Nd3Al trigonal pyramid, corners with two equivalent O(8)SrNd2Cu trigonal pyramids, and  an edgeedge with one O(2)Nd4 tetrahedra. In the thirteenth O site, O(13) is bonded to one Sr(1), one Sr(2), one Nd(4), and one Nd(6) atom to form OSr2Nd2 tetrahedra that share  a cornercorner with one O(12)Nd3Al tetrahedra, corners with two equivalent O(2)Nd4 tetrahedra,  a cornercorner with one O(3)Nd3Al trigonal pyramid,  a cornercorner with one O(8)SrNd2Cu trigonal pyramid, and  an edgeedge with one O(5)Sr2Nd2 tetrahedra. In the fourteenth O site, O(14) is bonded in a distorted see-saw-like geometry to one Nd(4), one Nd(5), one Nd(6), and one Al(1) atom. In the fifteenth O site, O(15) is bonded to one Nd(1), one Nd(2), one Nd(3), and one Nd(5) atom to form ONd4 tetrahedra that share corners with two equivalent O(12)Nd3Al tetrahedra, corners with two equivalent O(5)Sr2Nd2 tetrahedra, corners with two equivalent O(3)Nd3Al trigonal pyramids,  an edgeedge with one O(2)Nd4 tetrahedra, and  an edgeedge with one O(8)SrNd2Cu trigonal pyramid. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Nd(2), one Nd(4), and one Al(2) atom. is represented by the CIF file [CIF]
data_SrNd3AlCuO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.018
_cell_length_b   8.944
_cell_length_c   9.125
_cell_angle_alpha   108.530
_cell_angle_beta   103.735
_cell_angle_gamma   92.722
_symmetry_Int_Tables_number   1
_cell_volume   448.325
_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  0.451  0.812  0.547  1.0
  Sr  Sr1  1  0.075  0.916  0.209  1.0
  Nd  Nd2  1  0.090  0.191  0.670  1.0
  Nd  Nd3  1  0.801  0.580  0.857  1.0
  Nd  Nd4  1  0.711  0.161  0.894  1.0
  Nd  Nd5  1  0.414  0.542  0.080  1.0
  Nd  Nd6  1  0.480  0.274  0.465  1.0
  Nd  Nd7  1  0.959  0.473  0.289  1.0
  Al  Al8  1  0.318  0.205  0.101  1.0
  Al  Al9  1  0.210  0.545  0.648  1.0
  Cu  Cu10  1  0.053  0.883  0.772  1.0
  Cu  Cu11  1  0.556  0.886  0.991  1.0
  O  O12  1  0.420  0.043  0.156  1.0
  O  O13  1  0.762  0.441  0.027  1.0
  O  O14  1  0.111  0.350  0.499  1.0
  O  O15  1  0.501  0.558  0.638  1.0
  O  O16  1  0.284  0.055  0.491  1.0
  O  O17  1  0.052  0.668  0.561  1.0
  O  O18  1  0.844  0.873  0.912  1.0
  O  O19  1  0.831  0.998  0.672  1.0
  O  O20  1  0.385  0.944  0.820  1.0
  O  O21  1  0.677  0.748  0.098  1.0
  O  O22  1  0.039  0.224  0.133  1.0
  O  O23  1  0.325  0.255  0.928  1.0
  O  O24  1  0.210  0.663  0.256  1.0
  O  O25  1  0.524  0.375  0.254  1.0
  O  O26  1  0.741  0.299  0.698  1.0
  O  O27  1  0.177  0.536  0.833  1.0
[/CIF]
.