The compound described by Sr2V2GaAlO7 crystallizes in the monoclinic Cm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(5), one O(7), one O(8), and two equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and two equivalent O(8) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(3), one O(5), one O(6), and one O(8) atom to form distorted VO5 square pyramids that share corners with four equivalent V(2)O5 square pyramids,  a cornercorner with one Ga(1)O4 tetrahedra, corners with two equivalent Al(1)O4 trigonal pyramids, and  an edgeedge with one Al(1)O4 trigonal pyramid. In the second V site, V(2) is bonded to one O(1), one O(3), one O(4), one O(5), and one O(6) atom to form distorted VO5 square pyramids that share corners with four equivalent V(1)O5 square pyramids,  a cornercorner with one Ga(2)O4 tetrahedra, corners with two equivalent Al(1)O4 trigonal pyramids, and  an edgeedge with one Al(1)O4 trigonal pyramid. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(2), one O(7), and two equivalent O(8) atoms to form GaO4 tetrahedra that share corners with two equivalent V(1)O5 square pyramids and corners with two equivalent Ga(2)O4 tetrahedra. In the second Ga site, Ga(2) is bonded to one O(2), one O(7), and two equivalent O(4) atoms to form GaO4 tetrahedra that share corners with two equivalent V(2)O5 square pyramids and corners with two equivalent Ga(1)O4 tetrahedra. Al(1) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form AlO4 trigonal pyramids that share corners with two equivalent V(1)O5 square pyramids, corners with two equivalent V(2)O5 square pyramids,  an edgeedge with one V(1)O5 square pyramid, and  an edgeedge with one V(2)O5 square pyramid. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a 5-coordinate geometry to one Sr(1), two equivalent Sr(2), one V(1), and one Ga(1) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one V(1), one V(2), and one Al(1) atom. In the third O site, O(2) is bonded to two equivalent Sr(2), one Ga(1), and one Ga(2) atom to form corner-sharing OSr2Ga2 tetrahedra. In the fourth O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Sr(2), one V(1), one V(2), and one Al(1) atom. In the fifth O site, O(4) is bonded in a 5-coordinate geometry to one Sr(2), two equivalent Sr(1), one V(2), and one Ga(2) atom. In the sixth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), one V(1), one V(2), and one Al(1) atom. In the seventh O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Sr(2), one V(1), one V(2), and one Al(1) atom. In the eighth O site, O(7) is bonded to two equivalent Sr(1), one Ga(1), and one Ga(2) atom to form distorted corner-sharing OSr2Ga2 tetrahedra. is represented by the CIF file [CIF]
data_Sr2AlV2GaO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.735
_cell_length_b   11.735
_cell_length_c   5.582
_cell_angle_alpha   76.530
_cell_angle_beta   76.530
_cell_angle_gamma   140.014
_symmetry_Int_Tables_number   1
_cell_volume   361.609
_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  0.894  0.691  0.965  1.0
  Sr  Sr1  1  0.122  0.312  0.035  1.0
  Sr  Sr2  1  0.312  0.122  0.035  1.0
  Sr  Sr3  1  0.691  0.894  0.965  1.0
  Al  Al4  1  0.398  0.935  0.012  1.0
  Al  Al5  1  0.935  0.398  0.012  1.0
  V  V6  1  0.078  0.447  0.483  1.0
  V  V7  1  0.447  0.078  0.483  1.0
  V  V8  1  0.557  0.916  0.522  1.0
  V  V9  1  0.916  0.557  0.522  1.0
  Ga  Ga10  1  0.337  0.337  0.441  1.0
  Ga  Ga11  1  0.678  0.678  0.611  1.0
  O  O12  1  0.169  0.795  0.986  1.0
  O  O13  1  0.393  0.393  0.727  1.0
  O  O14  1  0.265  0.884  0.365  1.0
  O  O15  1  0.720  0.874  0.431  1.0
  O  O16  1  0.388  0.772  0.028  1.0
  O  O17  1  0.222  0.598  0.679  1.0
  O  O18  1  0.626  0.626  0.001  1.0
  O  O19  1  0.795  0.169  0.986  1.0
  O  O20  1  0.884  0.265  0.365  1.0
  O  O21  1  0.134  0.286  0.507  1.0
  O  O22  1  0.286  0.134  0.507  1.0
  O  O23  1  0.874  0.720  0.431  1.0
  O  O24  1  0.598  0.222  0.679  1.0
  O  O25  1  0.772  0.388  0.028  1.0
[/CIF]
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The compound described by Sr2V2GaAlO7 crystallizes in the monoclinic Cm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(5), one O(7), one O(8), and two equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and two equivalent O(8) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(3), one O(5), one O(6), and one O(8) atom to form distorted VO5 square pyramids that share corners with four equivalent V(2)O5 square pyramids,  a cornercorner with one Ga(1)O4 tetrahedra, corners with two equivalent Al(1)O4 trigonal pyramids, and  an edgeedge with one Al(1)O4 trigonal pyramid. In the second V site, V(2) is bonded to one O(1), one O(3), one O(4), one O(5), and one O(6) atom to form distorted VO5 square pyramids that share corners with four equivalent V(1)O5 square pyramids,  a cornercorner with one Ga(2)O4 tetrahedra, corners with two equivalent Al(1)O4 trigonal pyramids, and  an edgeedge with one Al(1)O4 trigonal pyramid. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(2), one O(7), and two equivalent O(8) atoms to form GaO4 tetrahedra that share corners with two equivalent V(1)O5 square pyramids and corners with two equivalent Ga(2)O4 tetrahedra. In the second Ga site, Ga(2) is bonded to one O(2), one O(7), and two equivalent O(4) atoms to form GaO4 tetrahedra that share corners with two equivalent V(2)O5 square pyramids and corners with two equivalent Ga(1)O4 tetrahedra. Al(1) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form AlO4 trigonal pyramids that share corners with two equivalent V(1)O5 square pyramids, corners with two equivalent V(2)O5 square pyramids,  an edgeedge with one V(1)O5 square pyramid, and  an edgeedge with one V(2)O5 square pyramid. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a 5-coordinate geometry to one Sr(1), two equivalent Sr(2), one V(1), and one Ga(1) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one V(1), one V(2), and one Al(1) atom. In the third O site, O(2) is bonded to two equivalent Sr(2), one Ga(1), and one Ga(2) atom to form corner-sharing OSr2Ga2 tetrahedra. In the fourth O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Sr(2), one V(1), one V(2), and one Al(1) atom. In the fifth O site, O(4) is bonded in a 5-coordinate geometry to one Sr(2), two equivalent Sr(1), one V(2), and one Ga(2) atom. In the sixth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), one V(1), one V(2), and one Al(1) atom. In the seventh O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Sr(2), one V(1), one V(2), and one Al(1) atom. In the eighth O site, O(7) is bonded to two equivalent Sr(1), one Ga(1), and one Ga(2) atom to form distorted corner-sharing OSr2Ga2 tetrahedra. is represented by the CIF file [CIF]
data_Sr2AlV2GaO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.735
_cell_length_b   11.735
_cell_length_c   5.582
_cell_angle_alpha   76.530
_cell_angle_beta   76.530
_cell_angle_gamma   140.014
_symmetry_Int_Tables_number   1
_cell_volume   361.609
_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  0.894  0.691  0.965  1.0
  Sr  Sr1  1  0.122  0.312  0.035  1.0
  Sr  Sr2  1  0.312  0.122  0.035  1.0
  Sr  Sr3  1  0.691  0.894  0.965  1.0
  Al  Al4  1  0.398  0.935  0.012  1.0
  Al  Al5  1  0.935  0.398  0.012  1.0
  V  V6  1  0.078  0.447  0.483  1.0
  V  V7  1  0.447  0.078  0.483  1.0
  V  V8  1  0.557  0.916  0.522  1.0
  V  V9  1  0.916  0.557  0.522  1.0
  Ga  Ga10  1  0.337  0.337  0.441  1.0
  Ga  Ga11  1  0.678  0.678  0.611  1.0
  O  O12  1  0.169  0.795  0.986  1.0
  O  O13  1  0.393  0.393  0.727  1.0
  O  O14  1  0.265  0.884  0.365  1.0
  O  O15  1  0.720  0.874  0.431  1.0
  O  O16  1  0.388  0.772  0.028  1.0
  O  O17  1  0.222  0.598  0.679  1.0
  O  O18  1  0.626  0.626  0.001  1.0
  O  O19  1  0.795  0.169  0.986  1.0
  O  O20  1  0.884  0.265  0.365  1.0
  O  O21  1  0.134  0.286  0.507  1.0
  O  O22  1  0.286  0.134  0.507  1.0
  O  O23  1  0.874  0.720  0.431  1.0
  O  O24  1  0.598  0.222  0.679  1.0
  O  O25  1  0.772  0.388  0.028  1.0
[/CIF]
.