The structure described by CaCr2Al10 is Bergman Structure: Mg32(Al,Zn)49 Bergman-like structured and crystallizes in the tetragonal P4/nmm space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 16-coordinate geometry to four equivalent Cr(1); four Al(1,1,1); and eight Al(2,2,2,2) atoms. In the second Ca site, Ca(2) is bonded in a 16-coordinate geometry to four equivalent Al(3), four equivalent Al(5), and eight equivalent Al(4) atoms. Cr(1) is bonded in a 11-coordinate geometry to one Ca(1); two Al(1,1); two Al(2,2); two equivalent Al(3); two equivalent Al(4); and two equivalent Al(5) atoms. There are thirteen inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one Ca(1), two equivalent Cr(1), one Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. In the second Al site, Al(1) is bonded in a 10-coordinate geometry to one Ca(1), two equivalent Cr(1), one Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. In the third Al site, Al(1) is bonded in a 10-coordinate geometry to one Ca(1), two equivalent Cr(1), one Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. In the fourth Al site, Al(5) is bonded in a 9-coordinate geometry to one Ca(2); two equivalent Cr(1); one Al(5); two Al(2,2); two equivalent Al(3); and two equivalent Al(4) atoms. In the fifth Al site, Al(1) is bonded in a 10-coordinate geometry to one Ca(1), two equivalent Cr(1), one Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. In the sixth Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ca(1); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(3); and two equivalent Al(5) atoms. In the seventh Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ca(1); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(3); and two equivalent Al(5) atoms. In the eighth Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ca(1); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(3); and two equivalent Al(5) atoms. In the ninth Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ca(1); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(3); and two equivalent Al(5) atoms. In the tenth Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ca(1); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(3); and two equivalent Al(5) atoms. In the eleventh Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ca(1); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(3); and two equivalent Al(5) atoms. In the twelfth Al site, Al(3) is bonded in a 11-coordinate geometry to one Ca(2); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(4); and two equivalent Al(5) atoms. In the thirteenth Al site, Al(4) is bonded in a 12-coordinate geometry to two equivalent Ca(2), two equivalent Cr(1), two equivalent Al(1), two equivalent Al(3), two equivalent Al(4), and two equivalent Al(5) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca(Al5Cr)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.878
_cell_length_b   12.878
_cell_length_c   5.159
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   855.624
_cell_formula_units_Z   4
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  0.500  0.500  0.000  1.0
  Ca  Ca1  1  0.000  0.000  0.000  1.0
  Ca  Ca2  1  0.000  0.500  0.519  1.0
  Ca  Ca3  1  0.500  0.000  0.481  1.0
  Al  Al4  1  0.174  0.174  0.000  1.0
  Al  Al5  1  0.674  0.326  0.000  1.0
  Al  Al6  1  0.326  0.674  0.000  1.0
  Al  Al7  1  0.826  0.826  0.000  1.0
  Al  Al8  1  0.326  0.326  0.000  1.0
  Al  Al9  1  0.826  0.174  0.000  1.0
  Al  Al10  1  0.174  0.826  0.000  1.0
  Al  Al11  1  0.674  0.674  0.000  1.0
  Al  Al12  1  0.614  0.614  0.500  1.0
  Al  Al13  1  0.114  0.886  0.500  1.0
  Al  Al14  1  0.886  0.114  0.500  1.0
  Al  Al15  1  0.386  0.386  0.500  1.0
  Al  Al16  1  0.886  0.886  0.500  1.0
  Al  Al17  1  0.386  0.614  0.500  1.0
  Al  Al18  1  0.614  0.386  0.500  1.0
  Al  Al19  1  0.114  0.114  0.500  1.0
  Al  Al20  1  0.239  0.500  0.749  1.0
  Al  Al21  1  0.000  0.261  0.749  1.0
  Al  Al22  1  0.000  0.739  0.749  1.0
  Al  Al23  1  0.761  0.500  0.749  1.0
  Al  Al24  1  0.261  0.000  0.251  1.0
  Al  Al25  1  0.739  0.000  0.251  1.0
  Al  Al26  1  0.500  0.239  0.251  1.0
  Al  Al27  1  0.500  0.761  0.251  1.0
  Al  Al28  1  0.109  0.609  0.037  1.0
  Al  Al29  1  0.109  0.391  0.037  1.0
  Al  Al30  1  0.891  0.609  0.037  1.0
  Al  Al31  1  0.891  0.391  0.037  1.0
  Al  Al32  1  0.391  0.109  0.963  1.0
  Al  Al33  1  0.609  0.891  0.963  1.0
  Al  Al34  1  0.609  0.109  0.963  1.0
  Al  Al35  1  0.391  0.891  0.963  1.0
  Al  Al36  1  0.175  0.675  0.481  1.0
  Al  Al37  1  0.175  0.325  0.481  1.0
  Al  Al38  1  0.825  0.675  0.481  1.0
  Al  Al39  1  0.825  0.325  0.481  1.0
  Al  Al40  1  0.325  0.175  0.519  1.0
  Al  Al41  1  0.675  0.825  0.519  1.0
  Al  Al42  1  0.675  0.175  0.519  1.0
  Al  Al43  1  0.325  0.825  0.519  1.0
  Cr  Cr44  1  0.740  0.500  0.254  1.0
  Cr  Cr45  1  0.000  0.760  0.254  1.0
  Cr  Cr46  1  0.000  0.240  0.254  1.0
  Cr  Cr47  1  0.260  0.500  0.254  1.0
  Cr  Cr48  1  0.760  0.000  0.746  1.0
  Cr  Cr49  1  0.240  0.000  0.746  1.0
  Cr  Cr50  1  0.500  0.740  0.746  1.0
  Cr  Cr51  1  0.500  0.260  0.746  1.0
[/CIF]
.
The structure described by CaCr2Al10 is Bergman Structure: Mg32(Al,Zn)49 Bergman-like structured and crystallizes in the tetragonal P4/nmm space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 16-coordinate geometry to four equivalent Cr(1); four Al(1,1,1); and eight Al(2,2,2,2) atoms. In the second Ca site, Ca(2) is bonded in a 16-coordinate geometry to four equivalent Al(3), four equivalent Al(5), and eight equivalent Al(4) atoms. Cr(1) is bonded in a 11-coordinate geometry to one Ca(1); two Al(1,1); two Al(2,2); two equivalent Al(3); two equivalent Al(4); and two equivalent Al(5) atoms. There are thirteen inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one Ca(1), two equivalent Cr(1), one Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. In the second Al site, Al(1) is bonded in a 10-coordinate geometry to one Ca(1), two equivalent Cr(1), one Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. In the third Al site, Al(1) is bonded in a 10-coordinate geometry to one Ca(1), two equivalent Cr(1), one Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. In the fourth Al site, Al(5) is bonded in a 9-coordinate geometry to one Ca(2); two equivalent Cr(1); one Al(5); two Al(2,2); two equivalent Al(3); and two equivalent Al(4) atoms. In the fifth Al site, Al(1) is bonded in a 10-coordinate geometry to one Ca(1), two equivalent Cr(1), one Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. In the sixth Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ca(1); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(3); and two equivalent Al(5) atoms. In the seventh Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ca(1); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(3); and two equivalent Al(5) atoms. In the eighth Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ca(1); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(3); and two equivalent Al(5) atoms. In the ninth Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ca(1); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(3); and two equivalent Al(5) atoms. In the tenth Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ca(1); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(3); and two equivalent Al(5) atoms. In the eleventh Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ca(1); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(3); and two equivalent Al(5) atoms. In the twelfth Al site, Al(3) is bonded in a 11-coordinate geometry to one Ca(2); two equivalent Cr(1); two equivalent Al(1); two Al(2,2); two equivalent Al(4); and two equivalent Al(5) atoms. In the thirteenth Al site, Al(4) is bonded in a 12-coordinate geometry to two equivalent Ca(2), two equivalent Cr(1), two equivalent Al(1), two equivalent Al(3), two equivalent Al(4), and two equivalent Al(5) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca(Al5Cr)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.878
_cell_length_b   12.878
_cell_length_c   5.159
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   855.624
_cell_formula_units_Z   4
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  0.500  0.500  0.000  1.0
  Ca  Ca1  1  0.000  0.000  0.000  1.0
  Ca  Ca2  1  0.000  0.500  0.519  1.0
  Ca  Ca3  1  0.500  0.000  0.481  1.0
  Al  Al4  1  0.174  0.174  0.000  1.0
  Al  Al5  1  0.674  0.326  0.000  1.0
  Al  Al6  1  0.326  0.674  0.000  1.0
  Al  Al7  1  0.826  0.826  0.000  1.0
  Al  Al8  1  0.326  0.326  0.000  1.0
  Al  Al9  1  0.826  0.174  0.000  1.0
  Al  Al10  1  0.174  0.826  0.000  1.0
  Al  Al11  1  0.674  0.674  0.000  1.0
  Al  Al12  1  0.614  0.614  0.500  1.0
  Al  Al13  1  0.114  0.886  0.500  1.0
  Al  Al14  1  0.886  0.114  0.500  1.0
  Al  Al15  1  0.386  0.386  0.500  1.0
  Al  Al16  1  0.886  0.886  0.500  1.0
  Al  Al17  1  0.386  0.614  0.500  1.0
  Al  Al18  1  0.614  0.386  0.500  1.0
  Al  Al19  1  0.114  0.114  0.500  1.0
  Al  Al20  1  0.239  0.500  0.749  1.0
  Al  Al21  1  0.000  0.261  0.749  1.0
  Al  Al22  1  0.000  0.739  0.749  1.0
  Al  Al23  1  0.761  0.500  0.749  1.0
  Al  Al24  1  0.261  0.000  0.251  1.0
  Al  Al25  1  0.739  0.000  0.251  1.0
  Al  Al26  1  0.500  0.239  0.251  1.0
  Al  Al27  1  0.500  0.761  0.251  1.0
  Al  Al28  1  0.109  0.609  0.037  1.0
  Al  Al29  1  0.109  0.391  0.037  1.0
  Al  Al30  1  0.891  0.609  0.037  1.0
  Al  Al31  1  0.891  0.391  0.037  1.0
  Al  Al32  1  0.391  0.109  0.963  1.0
  Al  Al33  1  0.609  0.891  0.963  1.0
  Al  Al34  1  0.609  0.109  0.963  1.0
  Al  Al35  1  0.391  0.891  0.963  1.0
  Al  Al36  1  0.175  0.675  0.481  1.0
  Al  Al37  1  0.175  0.325  0.481  1.0
  Al  Al38  1  0.825  0.675  0.481  1.0
  Al  Al39  1  0.825  0.325  0.481  1.0
  Al  Al40  1  0.325  0.175  0.519  1.0
  Al  Al41  1  0.675  0.825  0.519  1.0
  Al  Al42  1  0.675  0.175  0.519  1.0
  Al  Al43  1  0.325  0.825  0.519  1.0
  Cr  Cr44  1  0.740  0.500  0.254  1.0
  Cr  Cr45  1  0.000  0.760  0.254  1.0
  Cr  Cr46  1  0.000  0.240  0.254  1.0
  Cr  Cr47  1  0.260  0.500  0.254  1.0
  Cr  Cr48  1  0.760  0.000  0.746  1.0
  Cr  Cr49  1  0.240  0.000  0.746  1.0
  Cr  Cr50  1  0.500  0.740  0.746  1.0
  Cr  Cr51  1  0.500  0.260  0.746  1.0
[/CIF]
.