The structure described by Tb(Mg4Al3)4 is gamma-brass-derived structured and crystallizes in the trigonal R3m space group. There are five inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 3-coordinate geometry to one Mg(3), four equivalent Mg(5), one Tb(1), one Al(2), and four equivalent Al(3) atoms. In the second Mg site, Mg(2) is bonded in a 16-coordinate geometry to three equivalent Mg(3), one Tb(1), three equivalent Al(1), three equivalent Al(2), and six equivalent Al(3) atoms. In the third Mg site, Mg(3) is bonded in a 11-coordinate geometry to one Mg(1), one Mg(2), one Mg(4), two equivalent Mg(5), two equivalent Al(1), two equivalent Al(2), and two equivalent Al(3) atoms. In the fourth Mg site, Mg(4) is bonded in a 6-coordinate geometry to one Mg(3), four equivalent Mg(5), one Tb(1), one Al(1), two equivalent Al(2), and two equivalent Al(3) atoms. In the fifth Mg site, Mg(5) is bonded in a 12-coordinate geometry to one Mg(3), two equivalent Mg(1), two equivalent Mg(4), two equivalent Mg(5), one Al(2), two equivalent Al(1), and two equivalent Al(3) atoms. Tb(1) is bonded in a 16-coordinate geometry to one Mg(2), three equivalent Mg(1), three equivalent Mg(4), three equivalent Al(2), and six equivalent Al(3) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 11-coordinate geometry to one Mg(2), one Mg(4), two equivalent Mg(3), four equivalent Mg(5), one Al(2), and two equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to one Mg(1), one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(5), one Tb(1), one Al(1), and two equivalent Al(2) atoms. In the third Al site, Al(3) is bonded in a distorted q6 geometry to one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(1), two equivalent Mg(5), one Tb(1), one Al(1), and two equivalent Al(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb(Mg4Al3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.255
_cell_length_b   9.255
_cell_length_c   9.255
_cell_angle_alpha   110.365
_cell_angle_beta   110.365
_cell_angle_gamma   110.365
_symmetry_Int_Tables_number   1
_cell_volume   589.172
_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
  Tb  Tb0  1  0.372  0.372  0.372  1.0
  Mg  Mg1  1  0.315  0.717  0.315  1.0
  Mg  Mg2  1  0.997  0.997  0.997  1.0
  Mg  Mg3  1  0.996  0.655  0.996  1.0
  Mg  Mg4  1  0.611  0.280  0.611  1.0
  Mg  Mg5  1  0.394  0.002  0.689  1.0
  Mg  Mg6  1  0.689  0.394  0.002  1.0
  Mg  Mg7  1  0.280  0.611  0.611  1.0
  Mg  Mg8  1  0.655  0.996  0.996  1.0
  Mg  Mg9  1  0.002  0.689  0.394  1.0
  Mg  Mg10  1  0.315  0.315  0.717  1.0
  Mg  Mg11  1  0.717  0.315  0.315  1.0
  Mg  Mg12  1  0.394  0.689  0.002  1.0
  Mg  Mg13  1  0.996  0.996  0.655  1.0
  Mg  Mg14  1  0.611  0.611  0.280  1.0
  Mg  Mg15  1  0.002  0.394  0.689  1.0
  Mg  Mg16  1  0.689  0.002  0.394  1.0
  Al  Al17  1  0.811  0.175  0.811  1.0
  Al  Al18  1  0.630  0.810  0.630  1.0
  Al  Al19  1  0.185  0.002  0.364  1.0
  Al  Al20  1  0.630  0.630  0.810  1.0
  Al  Al21  1  0.002  0.364  0.185  1.0
  Al  Al22  1  0.811  0.811  0.175  1.0
  Al  Al23  1  0.002  0.185  0.364  1.0
  Al  Al24  1  0.364  0.185  0.002  1.0
  Al  Al25  1  0.175  0.811  0.811  1.0
  Al  Al26  1  0.185  0.364  0.002  1.0
  Al  Al27  1  0.810  0.630  0.630  1.0
  Al  Al28  1  0.364  0.002  0.185  1.0
[/CIF]
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The structure described by Tb(Mg4Al3)4 is gamma-brass-derived structured and crystallizes in the trigonal R3m space group. There are five inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 3-coordinate geometry to one Mg(3), four equivalent Mg(5), one Tb(1), one Al(2), and four equivalent Al(3) atoms. In the second Mg site, Mg(2) is bonded in a 16-coordinate geometry to three equivalent Mg(3), one Tb(1), three equivalent Al(1), three equivalent Al(2), and six equivalent Al(3) atoms. In the third Mg site, Mg(3) is bonded in a 11-coordinate geometry to one Mg(1), one Mg(2), one Mg(4), two equivalent Mg(5), two equivalent Al(1), two equivalent Al(2), and two equivalent Al(3) atoms. In the fourth Mg site, Mg(4) is bonded in a 6-coordinate geometry to one Mg(3), four equivalent Mg(5), one Tb(1), one Al(1), two equivalent Al(2), and two equivalent Al(3) atoms. In the fifth Mg site, Mg(5) is bonded in a 12-coordinate geometry to one Mg(3), two equivalent Mg(1), two equivalent Mg(4), two equivalent Mg(5), one Al(2), two equivalent Al(1), and two equivalent Al(3) atoms. Tb(1) is bonded in a 16-coordinate geometry to one Mg(2), three equivalent Mg(1), three equivalent Mg(4), three equivalent Al(2), and six equivalent Al(3) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 11-coordinate geometry to one Mg(2), one Mg(4), two equivalent Mg(3), four equivalent Mg(5), one Al(2), and two equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to one Mg(1), one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(5), one Tb(1), one Al(1), and two equivalent Al(2) atoms. In the third Al site, Al(3) is bonded in a distorted q6 geometry to one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(1), two equivalent Mg(5), one Tb(1), one Al(1), and two equivalent Al(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb(Mg4Al3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.255
_cell_length_b   9.255
_cell_length_c   9.255
_cell_angle_alpha   110.365
_cell_angle_beta   110.365
_cell_angle_gamma   110.365
_symmetry_Int_Tables_number   1
_cell_volume   589.172
_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
  Tb  Tb0  1  0.372  0.372  0.372  1.0
  Mg  Mg1  1  0.315  0.717  0.315  1.0
  Mg  Mg2  1  0.997  0.997  0.997  1.0
  Mg  Mg3  1  0.996  0.655  0.996  1.0
  Mg  Mg4  1  0.611  0.280  0.611  1.0
  Mg  Mg5  1  0.394  0.002  0.689  1.0
  Mg  Mg6  1  0.689  0.394  0.002  1.0
  Mg  Mg7  1  0.280  0.611  0.611  1.0
  Mg  Mg8  1  0.655  0.996  0.996  1.0
  Mg  Mg9  1  0.002  0.689  0.394  1.0
  Mg  Mg10  1  0.315  0.315  0.717  1.0
  Mg  Mg11  1  0.717  0.315  0.315  1.0
  Mg  Mg12  1  0.394  0.689  0.002  1.0
  Mg  Mg13  1  0.996  0.996  0.655  1.0
  Mg  Mg14  1  0.611  0.611  0.280  1.0
  Mg  Mg15  1  0.002  0.394  0.689  1.0
  Mg  Mg16  1  0.689  0.002  0.394  1.0
  Al  Al17  1  0.811  0.175  0.811  1.0
  Al  Al18  1  0.630  0.810  0.630  1.0
  Al  Al19  1  0.185  0.002  0.364  1.0
  Al  Al20  1  0.630  0.630  0.810  1.0
  Al  Al21  1  0.002  0.364  0.185  1.0
  Al  Al22  1  0.811  0.811  0.175  1.0
  Al  Al23  1  0.002  0.185  0.364  1.0
  Al  Al24  1  0.364  0.185  0.002  1.0
  Al  Al25  1  0.175  0.811  0.811  1.0
  Al  Al26  1  0.185  0.364  0.002  1.0
  Al  Al27  1  0.810  0.630  0.630  1.0
  Al  Al28  1  0.364  0.002  0.185  1.0
[/CIF]
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