The compound described by Sr4MoAl6O16 crystallizes in the tetragonal I-4m2 space group. Sr(1) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted SrO8 hexagonal bipyramids that share corners with four equivalent Sr(1)O8 hexagonal bipyramids, corners with two equivalent Mo(1)O4 tetrahedra, edges with two equivalent Sr(1)O8 hexagonal bipyramids,  an edgeedge with one Al(2)O4 tetrahedra,  an edgeedge with one Al(3)O4 tetrahedra, and edges with four equivalent Al(1)O4 tetrahedra. Mo(1) is bonded to four equivalent O(4) atoms to form MoO4 tetrahedra that share corners with eight equivalent Sr(1)O8 hexagonal bipyramids. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form AlO4 tetrahedra that share  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Al(3)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and edges with four equivalent Sr(1)O8 hexagonal bipyramids. In the second Al site, Al(2) is bonded to four equivalent O(1) atoms to form AlO4 tetrahedra that share corners with four equivalent Al(1)O4 tetrahedra and edges with four equivalent Sr(1)O8 hexagonal bipyramids. In the third Al site, Al(3) is bonded to four equivalent O(2) atoms to form AlO4 tetrahedra that share corners with four equivalent Al(1)O4 tetrahedra and edges with four equivalent Sr(1)O8 hexagonal bipyramids. There are four inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Sr(1) and one Mo(1) atom. In the second O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(1), one Al(1), and one Al(2) atom. In the third O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(1), one Al(1), and one Al(3) atom. In the fourth O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(1) and two equivalent Al(1) atoms. is represented by the CIF card [CIF]
data_Sr4Al6MoO16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.288
_cell_length_b   8.288
_cell_length_c   8.288
_cell_angle_alpha   109.983
_cell_angle_beta   109.983
_cell_angle_gamma   108.452
_symmetry_Int_Tables_number   1
_cell_volume   438.230
_cell_formula_units_Z   1
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  0.491  0.991  0.983  1.0
  Sr  Sr1  1  0.009  0.991  0.500  1.0
  Sr  Sr2  1  0.009  0.509  0.017  1.0
  Sr  Sr3  1  0.491  0.509  0.500  1.0
  Al  Al4  1  0.504  0.252  0.748  1.0
  Al  Al5  1  0.750  0.250  0.500  1.0
  Al  Al6  1  0.245  0.496  0.748  1.0
  Al  Al7  1  0.250  0.750  0.500  1.0
  Al  Al8  1  0.504  0.755  0.252  1.0
  Al  Al9  1  0.748  0.496  0.252  1.0
  Mo  Mo10  1  0.000  0.000  0.000  1.0
  O  O11  1  0.664  0.001  0.337  1.0
  O  O12  1  0.307  0.652  0.654  1.0
  O  O13  1  0.661  0.339  0.000  1.0
  O  O14  1  0.348  0.002  0.654  1.0
  O  O15  1  0.999  0.336  0.663  1.0
  O  O16  1  0.661  0.661  0.321  1.0
  O  O17  1  0.664  0.328  0.663  1.0
  O  O18  1  0.998  0.652  0.346  1.0
  O  O19  1  0.339  0.661  0.000  1.0
  O  O20  1  0.348  0.693  0.346  1.0
  O  O21  1  0.672  0.336  0.337  1.0
  O  O22  1  0.339  0.339  0.679  1.0
  O  O23  1  0.108  0.954  0.846  1.0
  O  O24  1  0.046  0.892  0.154  1.0
  O  O25  1  0.108  0.262  0.154  1.0
  O  O26  1  0.738  0.892  0.846  1.0
[/CIF]
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The compound described by Sr4MoAl6O16 crystallizes in the tetragonal I-4m2 space group. Sr(1) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted SrO8 hexagonal bipyramids that share corners with four equivalent Sr(1)O8 hexagonal bipyramids, corners with two equivalent Mo(1)O4 tetrahedra, edges with two equivalent Sr(1)O8 hexagonal bipyramids,  an edgeedge with one Al(2)O4 tetrahedra,  an edgeedge with one Al(3)O4 tetrahedra, and edges with four equivalent Al(1)O4 tetrahedra. Mo(1) is bonded to four equivalent O(4) atoms to form MoO4 tetrahedra that share corners with eight equivalent Sr(1)O8 hexagonal bipyramids. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form AlO4 tetrahedra that share  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Al(3)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and edges with four equivalent Sr(1)O8 hexagonal bipyramids. In the second Al site, Al(2) is bonded to four equivalent O(1) atoms to form AlO4 tetrahedra that share corners with four equivalent Al(1)O4 tetrahedra and edges with four equivalent Sr(1)O8 hexagonal bipyramids. In the third Al site, Al(3) is bonded to four equivalent O(2) atoms to form AlO4 tetrahedra that share corners with four equivalent Al(1)O4 tetrahedra and edges with four equivalent Sr(1)O8 hexagonal bipyramids. There are four inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Sr(1) and one Mo(1) atom. In the second O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(1), one Al(1), and one Al(2) atom. In the third O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(1), one Al(1), and one Al(3) atom. In the fourth O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(1) and two equivalent Al(1) atoms. is represented by the CIF card [CIF]
data_Sr4Al6MoO16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.288
_cell_length_b   8.288
_cell_length_c   8.288
_cell_angle_alpha   109.983
_cell_angle_beta   109.983
_cell_angle_gamma   108.452
_symmetry_Int_Tables_number   1
_cell_volume   438.230
_cell_formula_units_Z   1
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  0.491  0.991  0.983  1.0
  Sr  Sr1  1  0.009  0.991  0.500  1.0
  Sr  Sr2  1  0.009  0.509  0.017  1.0
  Sr  Sr3  1  0.491  0.509  0.500  1.0
  Al  Al4  1  0.504  0.252  0.748  1.0
  Al  Al5  1  0.750  0.250  0.500  1.0
  Al  Al6  1  0.245  0.496  0.748  1.0
  Al  Al7  1  0.250  0.750  0.500  1.0
  Al  Al8  1  0.504  0.755  0.252  1.0
  Al  Al9  1  0.748  0.496  0.252  1.0
  Mo  Mo10  1  0.000  0.000  0.000  1.0
  O  O11  1  0.664  0.001  0.337  1.0
  O  O12  1  0.307  0.652  0.654  1.0
  O  O13  1  0.661  0.339  0.000  1.0
  O  O14  1  0.348  0.002  0.654  1.0
  O  O15  1  0.999  0.336  0.663  1.0
  O  O16  1  0.661  0.661  0.321  1.0
  O  O17  1  0.664  0.328  0.663  1.0
  O  O18  1  0.998  0.652  0.346  1.0
  O  O19  1  0.339  0.661  0.000  1.0
  O  O20  1  0.348  0.693  0.346  1.0
  O  O21  1  0.672  0.336  0.337  1.0
  O  O22  1  0.339  0.339  0.679  1.0
  O  O23  1  0.108  0.954  0.846  1.0
  O  O24  1  0.046  0.892  0.154  1.0
  O  O25  1  0.108  0.262  0.154  1.0
  O  O26  1  0.738  0.892  0.846  1.0
[/CIF]
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