The structure described by Al4(CoO4)3 crystallizes in the monoclinic Cm space group. There are six inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(17), one O(9), and two equivalent O(16) atoms to form CoO4 tetrahedra that share  a cornercorner with one Al(2)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, corners with three equivalent Co(3)O6 octahedra, and corners with four equivalent Al(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-62°. In the second Co site, Co(2) is bonded to one O(14), one O(6), and two equivalent O(4) atoms to form CoO4 tetrahedra that share corners with two equivalent Al(2)O6 octahedra, corners with two equivalent Al(3)O6 octahedra, and corners with four equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the third Co site, Co(3) is bonded to one O(17), one O(3), two equivalent O(1), and two equivalent O(16) atoms to form CoO6 octahedra that share corners with three equivalent Co(1)O4 tetrahedra,  an edgeedge with one Al(2)O6 octahedra, edges with two equivalent Al(1)O6 octahedra, and edges with two equivalent Al(4)O6 octahedra. In the fourth Co site, Co(4) is bonded to one O(2), one O(8), and two equivalent O(5) atoms to form CoO4 tetrahedra that share  a cornercorner with one Al(2)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, and corners with four equivalent Al(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. In the fifth Co site, Co(5) is bonded to one O(12), one O(18), and two equivalent O(11) atoms to form CoO4 tetrahedra that share corners with two equivalent Al(4)O6 octahedra, corners with three equivalent Al(5)O6 octahedra, and corners with four equivalent Al(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-59°. In the sixth Co site, Co(6) is bonded to one O(15), one O(7), and two equivalent O(10) atoms to form CoO4 tetrahedra that share corners with two equivalent Al(3)O6 octahedra, corners with three equivalent Al(5)O6 octahedra, and corners with four equivalent Al(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-58°. There are five inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(9) atom to form AlO6 octahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra,  an edgeedge with one Co(3)O6 octahedra, edges with two equivalent Al(1)O6 octahedra, and edges with two equivalent Al(2)O6 octahedra. In the second Al site, Al(2) is bonded to one O(2), one O(9), two equivalent O(1), and two equivalent O(4) atoms to form AlO6 octahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra,  an edgeedge with one Co(3)O6 octahedra, and edges with four equivalent Al(1)O6 octahedra. In the third Al site, Al(3) is bonded to one O(11), one O(12), one O(14), one O(5), one O(7), and one O(8) atom to form AlO6 octahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra, corners with two equivalent Co(4)O4 tetrahedra, corners with two equivalent Co(5)O4 tetrahedra,  an edgeedge with one Al(5)O6 octahedra, and edges with two equivalent Al(3)O6 octahedra. In the fourth Al site, Al(4) is bonded to one O(10), one O(13), one O(15), one O(16), one O(17), and one O(18) atom to form AlO6 octahedra that share  a cornercorner with one Co(5)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(6)O4 tetrahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Al(5)O6 octahedra, and edges with two equivalent Al(4)O6 octahedra. In the fifth Al site, Al(5) is bonded to one O(12), one O(15), two equivalent O(10), and two equivalent O(11) atoms to form AlO6 octahedra that share corners with three equivalent Co(5)O4 tetrahedra, corners with three equivalent Co(6)O4 tetrahedra, edges with two equivalent Al(3)O6 octahedra, and edges with two equivalent Al(4)O6 octahedra. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Co(3), one Al(1), and one Al(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Co(4), one Al(2), and two equivalent Al(1) atoms. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Co(3) and two equivalent Al(1) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Co(2), one Al(1), and one Al(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Co(4) and one Al(3) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Co(2) and two equivalent Al(1) atoms. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Co(6) and two equivalent Al(3) atoms. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Co(4) and two equivalent Al(3) atoms. In the ninth O site, O(9) is bonded to one Co(1), one Al(2), and two equivalent Al(1) atoms to form distorted corner-sharing OAl3Co tetrahedra. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Co(6), one Al(4), and one Al(5) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Co(5), one Al(3), and one Al(5) atom. In the twelfth O site, O(12) is bonded to one Co(5), one Al(5), and two equivalent Al(3) atoms to form distorted corner-sharing OAl3Co trigonal pyramids. In the thirteenth O site, O(13) is bonded in a water-like geometry to two equivalent Al(4) atoms. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Co(2) and two equivalent Al(3) atoms. In the fifteenth O site, O(15) is bonded to one Co(6), one Al(5), and two equivalent Al(4) atoms to form distorted OAl3Co trigonal pyramids that share  a cornercorner with one O(12)Al3Co trigonal pyramid and corners with two equivalent O(17)Al2Co2 trigonal pyramids. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Co(1), one Co(3), and one Al(4) atom. In the seventeenth O site, O(17) is bonded to one Co(1), one Co(3), and two equivalent Al(4) atoms to form distorted corner-sharing OAl2Co2 trigonal pyramids. In the eighteenth O site, O(18) is bonded in a trigonal planar geometry to one Co(5) and two equivalent Al(4) atoms. is represented by the CIF card [CIF]
data_Al4(CoO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.751
_cell_length_b   5.751
_cell_length_c   13.909
_cell_angle_alpha   89.701
_cell_angle_beta   89.701
_cell_angle_gamma   59.981
_symmetry_Int_Tables_number   1
_cell_volume   398.349
_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
  Al  Al0  1  0.833  0.336  0.791  1.0
  Al  Al1  1  0.833  0.833  0.793  1.0
  Al  Al2  1  0.336  0.833  0.791  1.0
  Al  Al3  1  0.162  0.669  0.462  1.0
  Al  Al4  1  0.669  0.162  0.462  1.0
  Al  Al5  1  0.504  0.000  0.124  1.0
  Al  Al6  1  0.334  0.334  0.292  1.0
  Al  Al7  1  0.000  0.504  0.124  1.0
  Co  Co8  1  0.009  0.009  1.000  1.0
  Co  Co9  1  0.336  0.336  0.673  1.0
  Co  Co10  1  0.665  0.665  0.953  1.0
  Co  Co11  1  0.666  0.666  0.576  1.0
  Co  Co12  1  0.671  0.671  0.332  1.0
  Co  Co13  1  0.998  0.998  0.254  1.0
  O  O14  1  0.951  0.524  0.868  1.0
  O  O15  1  0.668  0.668  0.712  1.0
  O  O16  1  0.523  0.523  0.868  1.0
  O  O17  1  0.524  0.951  0.868  1.0
  O  O18  1  0.163  0.674  0.722  1.0
  O  O19  1  0.346  0.810  0.536  1.0
  O  O20  1  0.165  0.165  0.720  1.0
  O  O21  1  0.991  0.991  0.387  1.0
  O  O22  1  0.839  0.839  0.532  1.0
  O  O23  1  0.000  0.000  0.860  1.0
  O  O24  1  0.810  0.346  0.536  1.0
  O  O25  1  0.674  0.163  0.722  1.0
  O  O26  1  0.645  0.157  0.211  1.0
  O  O27  1  0.510  0.024  0.372  1.0
  O  O28  1  0.483  0.483  0.379  1.0
  O  O29  1  0.322  0.322  0.056  1.0
  O  O30  1  0.349  0.349  0.540  1.0
  O  O31  1  0.181  0.181  0.208  1.0
  O  O32  1  0.157  0.645  0.211  1.0
  O  O33  1  0.024  0.510  0.372  1.0
  O  O34  1  0.850  0.361  0.037  1.0
  O  O35  1  0.822  0.822  0.046  1.0
  O  O36  1  0.681  0.681  0.201  1.0
  O  O37  1  0.361  0.850  0.037  1.0
[/CIF]
.
The structure described by Al4(CoO4)3 crystallizes in the monoclinic Cm space group. There are six inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(17), one O(9), and two equivalent O(16) atoms to form CoO4 tetrahedra that share  a cornercorner with one Al(2)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, corners with three equivalent Co(3)O6 octahedra, and corners with four equivalent Al(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-62°. In the second Co site, Co(2) is bonded to one O(14), one O(6), and two equivalent O(4) atoms to form CoO4 tetrahedra that share corners with two equivalent Al(2)O6 octahedra, corners with two equivalent Al(3)O6 octahedra, and corners with four equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the third Co site, Co(3) is bonded to one O(17), one O(3), two equivalent O(1), and two equivalent O(16) atoms to form CoO6 octahedra that share corners with three equivalent Co(1)O4 tetrahedra,  an edgeedge with one Al(2)O6 octahedra, edges with two equivalent Al(1)O6 octahedra, and edges with two equivalent Al(4)O6 octahedra. In the fourth Co site, Co(4) is bonded to one O(2), one O(8), and two equivalent O(5) atoms to form CoO4 tetrahedra that share  a cornercorner with one Al(2)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, and corners with four equivalent Al(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. In the fifth Co site, Co(5) is bonded to one O(12), one O(18), and two equivalent O(11) atoms to form CoO4 tetrahedra that share corners with two equivalent Al(4)O6 octahedra, corners with three equivalent Al(5)O6 octahedra, and corners with four equivalent Al(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-59°. In the sixth Co site, Co(6) is bonded to one O(15), one O(7), and two equivalent O(10) atoms to form CoO4 tetrahedra that share corners with two equivalent Al(3)O6 octahedra, corners with three equivalent Al(5)O6 octahedra, and corners with four equivalent Al(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-58°. There are five inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(9) atom to form AlO6 octahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra,  an edgeedge with one Co(3)O6 octahedra, edges with two equivalent Al(1)O6 octahedra, and edges with two equivalent Al(2)O6 octahedra. In the second Al site, Al(2) is bonded to one O(2), one O(9), two equivalent O(1), and two equivalent O(4) atoms to form AlO6 octahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra,  an edgeedge with one Co(3)O6 octahedra, and edges with four equivalent Al(1)O6 octahedra. In the third Al site, Al(3) is bonded to one O(11), one O(12), one O(14), one O(5), one O(7), and one O(8) atom to form AlO6 octahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra, corners with two equivalent Co(4)O4 tetrahedra, corners with two equivalent Co(5)O4 tetrahedra,  an edgeedge with one Al(5)O6 octahedra, and edges with two equivalent Al(3)O6 octahedra. In the fourth Al site, Al(4) is bonded to one O(10), one O(13), one O(15), one O(16), one O(17), and one O(18) atom to form AlO6 octahedra that share  a cornercorner with one Co(5)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(6)O4 tetrahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Al(5)O6 octahedra, and edges with two equivalent Al(4)O6 octahedra. In the fifth Al site, Al(5) is bonded to one O(12), one O(15), two equivalent O(10), and two equivalent O(11) atoms to form AlO6 octahedra that share corners with three equivalent Co(5)O4 tetrahedra, corners with three equivalent Co(6)O4 tetrahedra, edges with two equivalent Al(3)O6 octahedra, and edges with two equivalent Al(4)O6 octahedra. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Co(3), one Al(1), and one Al(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Co(4), one Al(2), and two equivalent Al(1) atoms. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Co(3) and two equivalent Al(1) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Co(2), one Al(1), and one Al(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Co(4) and one Al(3) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Co(2) and two equivalent Al(1) atoms. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Co(6) and two equivalent Al(3) atoms. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Co(4) and two equivalent Al(3) atoms. In the ninth O site, O(9) is bonded to one Co(1), one Al(2), and two equivalent Al(1) atoms to form distorted corner-sharing OAl3Co tetrahedra. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Co(6), one Al(4), and one Al(5) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Co(5), one Al(3), and one Al(5) atom. In the twelfth O site, O(12) is bonded to one Co(5), one Al(5), and two equivalent Al(3) atoms to form distorted corner-sharing OAl3Co trigonal pyramids. In the thirteenth O site, O(13) is bonded in a water-like geometry to two equivalent Al(4) atoms. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Co(2) and two equivalent Al(3) atoms. In the fifteenth O site, O(15) is bonded to one Co(6), one Al(5), and two equivalent Al(4) atoms to form distorted OAl3Co trigonal pyramids that share  a cornercorner with one O(12)Al3Co trigonal pyramid and corners with two equivalent O(17)Al2Co2 trigonal pyramids. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Co(1), one Co(3), and one Al(4) atom. In the seventeenth O site, O(17) is bonded to one Co(1), one Co(3), and two equivalent Al(4) atoms to form distorted corner-sharing OAl2Co2 trigonal pyramids. In the eighteenth O site, O(18) is bonded in a trigonal planar geometry to one Co(5) and two equivalent Al(4) atoms. is represented by the CIF card [CIF]
data_Al4(CoO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.751
_cell_length_b   5.751
_cell_length_c   13.909
_cell_angle_alpha   89.701
_cell_angle_beta   89.701
_cell_angle_gamma   59.981
_symmetry_Int_Tables_number   1
_cell_volume   398.349
_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
  Al  Al0  1  0.833  0.336  0.791  1.0
  Al  Al1  1  0.833  0.833  0.793  1.0
  Al  Al2  1  0.336  0.833  0.791  1.0
  Al  Al3  1  0.162  0.669  0.462  1.0
  Al  Al4  1  0.669  0.162  0.462  1.0
  Al  Al5  1  0.504  0.000  0.124  1.0
  Al  Al6  1  0.334  0.334  0.292  1.0
  Al  Al7  1  0.000  0.504  0.124  1.0
  Co  Co8  1  0.009  0.009  1.000  1.0
  Co  Co9  1  0.336  0.336  0.673  1.0
  Co  Co10  1  0.665  0.665  0.953  1.0
  Co  Co11  1  0.666  0.666  0.576  1.0
  Co  Co12  1  0.671  0.671  0.332  1.0
  Co  Co13  1  0.998  0.998  0.254  1.0
  O  O14  1  0.951  0.524  0.868  1.0
  O  O15  1  0.668  0.668  0.712  1.0
  O  O16  1  0.523  0.523  0.868  1.0
  O  O17  1  0.524  0.951  0.868  1.0
  O  O18  1  0.163  0.674  0.722  1.0
  O  O19  1  0.346  0.810  0.536  1.0
  O  O20  1  0.165  0.165  0.720  1.0
  O  O21  1  0.991  0.991  0.387  1.0
  O  O22  1  0.839  0.839  0.532  1.0
  O  O23  1  0.000  0.000  0.860  1.0
  O  O24  1  0.810  0.346  0.536  1.0
  O  O25  1  0.674  0.163  0.722  1.0
  O  O26  1  0.645  0.157  0.211  1.0
  O  O27  1  0.510  0.024  0.372  1.0
  O  O28  1  0.483  0.483  0.379  1.0
  O  O29  1  0.322  0.322  0.056  1.0
  O  O30  1  0.349  0.349  0.540  1.0
  O  O31  1  0.181  0.181  0.208  1.0
  O  O32  1  0.157  0.645  0.211  1.0
  O  O33  1  0.024  0.510  0.372  1.0
  O  O34  1  0.850  0.361  0.037  1.0
  O  O35  1  0.822  0.822  0.046  1.0
  O  O36  1  0.681  0.681  0.201  1.0
  O  O37  1  0.361  0.850  0.037  1.0
[/CIF]
.