The material described by Ca4Al3O10 crystallizes in the triclinic P-1 space group. There are four inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(4), one O(6), one O(9), and two equivalent O(3) atoms. In the second Ca site, Ca(2) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(6), one O(8), and two equivalent O(2) atoms. In the third Ca site, Ca(3) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(3), one O(4), one O(5), and two equivalent O(7) atoms. In the fourth Ca site, Ca(4) is bonded in a 7-coordinate geometry to one O(1), one O(8), one O(9), two equivalent O(2), and two equivalent O(5) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(10), one O(2), one O(3), one O(5), and one O(8) atom to form AlO5 trigonal bipyramids that share corners with two equivalent Al(2)O4 tetrahedra and  an edgeedge with one Al(3)O5 trigonal bipyramid. In the second Al site, Al(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form corner-sharing AlO4 tetrahedra. In the third Al site, Al(3) is bonded to one O(10), one O(4), one O(6), one O(8), and one O(9) atom to form AlO5 trigonal bipyramids that share  a cornercorner with one Al(2)O4 tetrahedra and  an edgeedge with one Al(1)O5 trigonal bipyramid. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Ca(2), one Ca(3), one Ca(4), and one Al(2) atom to form distorted edge-sharing OCa4Al square pyramids. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Ca(2), two equivalent Ca(4), one Al(1), and one Al(2) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Ca(3), two equivalent Ca(1), and one Al(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), and one Al(3) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Ca(3), two equivalent Ca(4), one Al(1), and one Al(2) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Ca(2), one Al(2), and one Al(3) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to two equivalent Ca(3) and one O(7) atom. In the eighth O site, O(8) is bonded to one Ca(2), one Ca(4), one Al(1), and one Al(3) atom to form distorted edge-sharing OCa2Al2 trigonal pyramids. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ca(4), and one Al(3) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Ca(3), one Al(1), and one Al(3) atom. is represented by the CIF card [CIF]
data_Ca4Al3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.593
_cell_length_b   7.797
_cell_length_c   8.530
_cell_angle_alpha   76.933
_cell_angle_beta   76.001
_cell_angle_gamma   83.353
_symmetry_Int_Tables_number   1
_cell_volume   476.370
_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
  Ca  Ca0  1  0.387  0.816  0.487  1.0
  Ca  Ca1  1  0.547  0.812  0.907  1.0
  Ca  Ca2  1  0.808  0.742  0.542  1.0
  Ca  Ca3  1  0.027  0.802  0.899  1.0
  Ca  Ca4  1  0.973  0.198  0.101  1.0
  Ca  Ca5  1  0.192  0.258  0.458  1.0
  Ca  Ca6  1  0.453  0.188  0.093  1.0
  Ca  Ca7  1  0.613  0.184  0.513  1.0
  Al  Al8  1  0.751  0.839  0.203  1.0
  Al  Al9  1  0.211  0.875  0.183  1.0
  Al  Al10  1  0.599  0.544  0.234  1.0
  Al  Al11  1  0.249  0.161  0.797  1.0
  Al  Al12  1  0.401  0.456  0.766  1.0
  Al  Al13  1  0.789  0.125  0.817  1.0
  O  O14  1  0.201  0.051  0.289  1.0
  O  O15  1  0.274  0.972  0.967  1.0
  O  O16  1  0.662  0.968  0.364  1.0
  O  O17  1  0.543  0.635  0.737  1.0
  O  O18  1  0.991  0.825  0.190  1.0
  O  O19  1  0.398  0.727  0.213  1.0
  O  O20  1  0.928  0.449  0.524  1.0
  O  O21  1  0.751  0.679  0.059  1.0
  O  O22  1  0.236  0.653  0.734  1.0
  O  O23  1  0.343  0.347  0.622  1.0
  O  O24  1  0.657  0.653  0.378  1.0
  O  O25  1  0.764  0.347  0.266  1.0
  O  O26  1  0.249  0.321  0.941  1.0
  O  O27  1  0.072  0.551  0.476  1.0
  O  O28  1  0.602  0.273  0.787  1.0
  O  O29  1  0.009  0.175  0.810  1.0
  O  O30  1  0.457  0.365  0.263  1.0
  O  O31  1  0.338  0.032  0.636  1.0
  O  O32  1  0.726  0.028  0.033  1.0
  O  O33  1  0.799  0.949  0.711  1.0
[/CIF]
.
The material described by Ca4Al3O10 crystallizes in the triclinic P-1 space group. There are four inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(4), one O(6), one O(9), and two equivalent O(3) atoms. In the second Ca site, Ca(2) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(6), one O(8), and two equivalent O(2) atoms. In the third Ca site, Ca(3) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(3), one O(4), one O(5), and two equivalent O(7) atoms. In the fourth Ca site, Ca(4) is bonded in a 7-coordinate geometry to one O(1), one O(8), one O(9), two equivalent O(2), and two equivalent O(5) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(10), one O(2), one O(3), one O(5), and one O(8) atom to form AlO5 trigonal bipyramids that share corners with two equivalent Al(2)O4 tetrahedra and  an edgeedge with one Al(3)O5 trigonal bipyramid. In the second Al site, Al(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form corner-sharing AlO4 tetrahedra. In the third Al site, Al(3) is bonded to one O(10), one O(4), one O(6), one O(8), and one O(9) atom to form AlO5 trigonal bipyramids that share  a cornercorner with one Al(2)O4 tetrahedra and  an edgeedge with one Al(1)O5 trigonal bipyramid. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Ca(2), one Ca(3), one Ca(4), and one Al(2) atom to form distorted edge-sharing OCa4Al square pyramids. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Ca(2), two equivalent Ca(4), one Al(1), and one Al(2) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Ca(3), two equivalent Ca(1), and one Al(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), and one Al(3) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Ca(3), two equivalent Ca(4), one Al(1), and one Al(2) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Ca(2), one Al(2), and one Al(3) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to two equivalent Ca(3) and one O(7) atom. In the eighth O site, O(8) is bonded to one Ca(2), one Ca(4), one Al(1), and one Al(3) atom to form distorted edge-sharing OCa2Al2 trigonal pyramids. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ca(4), and one Al(3) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Ca(3), one Al(1), and one Al(3) atom. is represented by the CIF card [CIF]
data_Ca4Al3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.593
_cell_length_b   7.797
_cell_length_c   8.530
_cell_angle_alpha   76.933
_cell_angle_beta   76.001
_cell_angle_gamma   83.353
_symmetry_Int_Tables_number   1
_cell_volume   476.370
_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
  Ca  Ca0  1  0.387  0.816  0.487  1.0
  Ca  Ca1  1  0.547  0.812  0.907  1.0
  Ca  Ca2  1  0.808  0.742  0.542  1.0
  Ca  Ca3  1  0.027  0.802  0.899  1.0
  Ca  Ca4  1  0.973  0.198  0.101  1.0
  Ca  Ca5  1  0.192  0.258  0.458  1.0
  Ca  Ca6  1  0.453  0.188  0.093  1.0
  Ca  Ca7  1  0.613  0.184  0.513  1.0
  Al  Al8  1  0.751  0.839  0.203  1.0
  Al  Al9  1  0.211  0.875  0.183  1.0
  Al  Al10  1  0.599  0.544  0.234  1.0
  Al  Al11  1  0.249  0.161  0.797  1.0
  Al  Al12  1  0.401  0.456  0.766  1.0
  Al  Al13  1  0.789  0.125  0.817  1.0
  O  O14  1  0.201  0.051  0.289  1.0
  O  O15  1  0.274  0.972  0.967  1.0
  O  O16  1  0.662  0.968  0.364  1.0
  O  O17  1  0.543  0.635  0.737  1.0
  O  O18  1  0.991  0.825  0.190  1.0
  O  O19  1  0.398  0.727  0.213  1.0
  O  O20  1  0.928  0.449  0.524  1.0
  O  O21  1  0.751  0.679  0.059  1.0
  O  O22  1  0.236  0.653  0.734  1.0
  O  O23  1  0.343  0.347  0.622  1.0
  O  O24  1  0.657  0.653  0.378  1.0
  O  O25  1  0.764  0.347  0.266  1.0
  O  O26  1  0.249  0.321  0.941  1.0
  O  O27  1  0.072  0.551  0.476  1.0
  O  O28  1  0.602  0.273  0.787  1.0
  O  O29  1  0.009  0.175  0.810  1.0
  O  O30  1  0.457  0.365  0.263  1.0
  O  O31  1  0.338  0.032  0.636  1.0
  O  O32  1  0.726  0.028  0.033  1.0
  O  O33  1  0.799  0.949  0.711  1.0
[/CIF]
.