The material described by SrNdAl3O7 crystallizes in the orthorhombic Cmm2 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms. Nd(1) is bonded in a 8-coordinate geometry to one O(2), one O(4), two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(4), and two equivalent O(5) atoms to form corner-sharing AlO4 tetrahedra. In the second Al site, Al(2) is bonded to one O(2), one O(3), and two equivalent O(6) atoms to form corner-sharing AlO4 tetrahedra. In the third Al site, Al(3) is bonded to two equivalent O(5) and two equivalent O(6) atoms to form corner-sharing AlO4 tetrahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), two equivalent Nd(1), and one Al(1) atom to form distorted OSrNd2Al tetrahedra that share  a cornercorner with one O(4)Nd2Al2 tetrahedra, corners with four equivalent O(2)Sr2NdAl tetrahedra,  an edgeedge with one O(4)Nd2Al2 tetrahedra, and  an edgeedge with one O(1)SrNd2Al tetrahedra. In the second O site, O(2) is bonded to two equivalent Sr(1), one Nd(1), and one Al(2) atom to form distorted OSr2NdAl tetrahedra that share  a cornercorner with one O(4)Nd2Al2 tetrahedra, corners with four equivalent O(1)SrNd2Al tetrahedra, and  an edgeedge with one O(2)Sr2NdAl tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1) and two equivalent Al(2) atoms. In the fourth O site, O(4) is bonded to two equivalent Nd(1) and two equivalent Al(1) atoms to form distorted ONd2Al2 tetrahedra that share corners with two equivalent O(2)Sr2NdAl tetrahedra, corners with two equivalent O(1)SrNd2Al tetrahedra, and edges with two equivalent O(1)SrNd2Al tetrahedra. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Sr(1), one Nd(1), one Al(1), and one Al(3) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Nd(1), one Al(2), and one Al(3) atom. is represented by the CIF card [CIF]
data_SrNdAl3O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.918
_cell_length_b   7.918
_cell_length_c   5.241
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.240
_symmetry_Int_Tables_number   1
_cell_volume   328.607
_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  0.162  0.838  0.490  1.0
  Sr  Sr1  1  0.838  0.162  0.490  1.0
  Nd  Nd2  1  0.662  0.662  0.513  1.0
  Nd  Nd3  1  0.338  0.338  0.513  1.0
  Al  Al4  1  0.359  0.641  0.040  1.0
  Al  Al5  1  0.855  0.855  0.961  1.0
  Al  Al6  1  0.641  0.359  0.040  1.0
  Al  Al7  1  0.145  0.145  0.961  1.0
  Al  Al8  1  0.500  0.000  0.998  1.0
  Al  Al9  1  0.000  0.500  0.998  1.0
  O  O10  1  0.370  0.630  0.706  1.0
  O  O11  1  0.847  0.847  0.293  1.0
  O  O12  1  0.630  0.370  0.706  1.0
  O  O13  1  0.153  0.153  0.293  1.0
  O  O14  1  0.000  0.000  0.836  1.0
  O  O15  1  0.500  0.500  0.195  1.0
  O  O16  1  0.419  0.834  0.188  1.0
  O  O17  1  0.907  0.660  0.804  1.0
  O  O18  1  0.581  0.166  0.188  1.0
  O  O19  1  0.093  0.340  0.804  1.0
  O  O20  1  0.340  0.093  0.804  1.0
  O  O21  1  0.834  0.419  0.188  1.0
  O  O22  1  0.660  0.907  0.804  1.0
  O  O23  1  0.166  0.581  0.188  1.0
[/CIF]
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The material described by SrNdAl3O7 crystallizes in the orthorhombic Cmm2 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms. Nd(1) is bonded in a 8-coordinate geometry to one O(2), one O(4), two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(4), and two equivalent O(5) atoms to form corner-sharing AlO4 tetrahedra. In the second Al site, Al(2) is bonded to one O(2), one O(3), and two equivalent O(6) atoms to form corner-sharing AlO4 tetrahedra. In the third Al site, Al(3) is bonded to two equivalent O(5) and two equivalent O(6) atoms to form corner-sharing AlO4 tetrahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), two equivalent Nd(1), and one Al(1) atom to form distorted OSrNd2Al tetrahedra that share  a cornercorner with one O(4)Nd2Al2 tetrahedra, corners with four equivalent O(2)Sr2NdAl tetrahedra,  an edgeedge with one O(4)Nd2Al2 tetrahedra, and  an edgeedge with one O(1)SrNd2Al tetrahedra. In the second O site, O(2) is bonded to two equivalent Sr(1), one Nd(1), and one Al(2) atom to form distorted OSr2NdAl tetrahedra that share  a cornercorner with one O(4)Nd2Al2 tetrahedra, corners with four equivalent O(1)SrNd2Al tetrahedra, and  an edgeedge with one O(2)Sr2NdAl tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1) and two equivalent Al(2) atoms. In the fourth O site, O(4) is bonded to two equivalent Nd(1) and two equivalent Al(1) atoms to form distorted ONd2Al2 tetrahedra that share corners with two equivalent O(2)Sr2NdAl tetrahedra, corners with two equivalent O(1)SrNd2Al tetrahedra, and edges with two equivalent O(1)SrNd2Al tetrahedra. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Sr(1), one Nd(1), one Al(1), and one Al(3) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Nd(1), one Al(2), and one Al(3) atom. is represented by the CIF card [CIF]
data_SrNdAl3O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.918
_cell_length_b   7.918
_cell_length_c   5.241
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.240
_symmetry_Int_Tables_number   1
_cell_volume   328.607
_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  0.162  0.838  0.490  1.0
  Sr  Sr1  1  0.838  0.162  0.490  1.0
  Nd  Nd2  1  0.662  0.662  0.513  1.0
  Nd  Nd3  1  0.338  0.338  0.513  1.0
  Al  Al4  1  0.359  0.641  0.040  1.0
  Al  Al5  1  0.855  0.855  0.961  1.0
  Al  Al6  1  0.641  0.359  0.040  1.0
  Al  Al7  1  0.145  0.145  0.961  1.0
  Al  Al8  1  0.500  0.000  0.998  1.0
  Al  Al9  1  0.000  0.500  0.998  1.0
  O  O10  1  0.370  0.630  0.706  1.0
  O  O11  1  0.847  0.847  0.293  1.0
  O  O12  1  0.630  0.370  0.706  1.0
  O  O13  1  0.153  0.153  0.293  1.0
  O  O14  1  0.000  0.000  0.836  1.0
  O  O15  1  0.500  0.500  0.195  1.0
  O  O16  1  0.419  0.834  0.188  1.0
  O  O17  1  0.907  0.660  0.804  1.0
  O  O18  1  0.581  0.166  0.188  1.0
  O  O19  1  0.093  0.340  0.804  1.0
  O  O20  1  0.340  0.093  0.804  1.0
  O  O21  1  0.834  0.419  0.188  1.0
  O  O22  1  0.660  0.907  0.804  1.0
  O  O23  1  0.166  0.581  0.188  1.0
[/CIF]
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