The material structure described by LaCu9Mg2 crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded in a 12-coordinate geometry to three equivalent Cu(1) and nine equivalent Cu(4) atoms. La(1) is bonded in a distorted hexagonal planar geometry to three equivalent Cu(2), three equivalent Cu(3), and twelve equivalent Cu(4) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to six equivalent Mg(1) and six equivalent Cu(4) atoms to form CuMg6Cu6 cuboctahedra that share corners with twelve equivalent Cu(4)La2Mg3Cu7 cuboctahedra, edges with six equivalent Cu(1)Mg6Cu6 cuboctahedra, and faces with eighteen equivalent Cu(4)La2Mg3Cu7 cuboctahedra. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to three equivalent La(1) and six equivalent Cu(4) atoms. In the third Cu site, Cu(3) is bonded in a 9-coordinate geometry to three equivalent La(1) and six equivalent Cu(4) atoms. In the fourth Cu site, Cu(4) is bonded to three equivalent Mg(1), two equivalent La(1), one Cu(1), one Cu(2), one Cu(3), and four equivalent Cu(4) atoms to form CuLa2Mg3Cu7 cuboctahedra that share corners with two equivalent Cu(1)Mg6Cu6 cuboctahedra, corners with fifteen equivalent Cu(4)La2Mg3Cu7 cuboctahedra, edges with eight equivalent Cu(4)La2Mg3Cu7 cuboctahedra, faces with three equivalent Cu(1)Mg6Cu6 cuboctahedra, and faces with eleven equivalent Cu(4)La2Mg3Cu7 cuboctahedra. is represented by the CIF file [CIF]
data_LaMg2Cu9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.038
_cell_length_b   5.038
_cell_length_c   16.041
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.992
_symmetry_Int_Tables_number   1
_cell_volume   352.611
_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
  La  La0  1  0.333  0.667  0.750  1.0
  La  La1  1  0.667  0.333  0.250  1.0
  Mg  Mg2  1  0.333  0.667  0.530  1.0
  Mg  Mg3  1  0.667  0.333  0.030  1.0
  Mg  Mg4  1  0.667  0.333  0.470  1.0
  Mg  Mg5  1  0.333  0.667  0.970  1.0
  Cu  Cu6  1  1.000  0.000  1.000  1.0
  Cu  Cu7  1  1.000  1.000  0.500  1.0
  Cu  Cu8  1  0.000  1.000  0.250  1.0
  Cu  Cu9  1  1.000  0.000  0.750  1.0
  Cu  Cu10  1  0.333  0.667  0.250  1.0
  Cu  Cu11  1  0.667  0.333  0.750  1.0
  Cu  Cu12  1  0.168  0.335  0.122  1.0
  Cu  Cu13  1  0.832  0.168  0.622  1.0
  Cu  Cu14  1  0.335  0.168  0.622  1.0
  Cu  Cu15  1  0.665  0.832  0.122  1.0
  Cu  Cu16  1  0.168  0.832  0.122  1.0
  Cu  Cu17  1  0.832  0.665  0.878  1.0
  Cu  Cu18  1  0.832  0.168  0.878  1.0
  Cu  Cu19  1  0.832  0.665  0.622  1.0
  Cu  Cu20  1  0.335  0.168  0.878  1.0
  Cu  Cu21  1  0.665  0.832  0.378  1.0
  Cu  Cu22  1  0.168  0.335  0.378  1.0
  Cu  Cu23  1  0.168  0.832  0.378  1.0
[/CIF]
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The material structure described by LaCu9Mg2 crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded in a 12-coordinate geometry to three equivalent Cu(1) and nine equivalent Cu(4) atoms. La(1) is bonded in a distorted hexagonal planar geometry to three equivalent Cu(2), three equivalent Cu(3), and twelve equivalent Cu(4) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to six equivalent Mg(1) and six equivalent Cu(4) atoms to form CuMg6Cu6 cuboctahedra that share corners with twelve equivalent Cu(4)La2Mg3Cu7 cuboctahedra, edges with six equivalent Cu(1)Mg6Cu6 cuboctahedra, and faces with eighteen equivalent Cu(4)La2Mg3Cu7 cuboctahedra. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to three equivalent La(1) and six equivalent Cu(4) atoms. In the third Cu site, Cu(3) is bonded in a 9-coordinate geometry to three equivalent La(1) and six equivalent Cu(4) atoms. In the fourth Cu site, Cu(4) is bonded to three equivalent Mg(1), two equivalent La(1), one Cu(1), one Cu(2), one Cu(3), and four equivalent Cu(4) atoms to form CuLa2Mg3Cu7 cuboctahedra that share corners with two equivalent Cu(1)Mg6Cu6 cuboctahedra, corners with fifteen equivalent Cu(4)La2Mg3Cu7 cuboctahedra, edges with eight equivalent Cu(4)La2Mg3Cu7 cuboctahedra, faces with three equivalent Cu(1)Mg6Cu6 cuboctahedra, and faces with eleven equivalent Cu(4)La2Mg3Cu7 cuboctahedra. is represented by the CIF file [CIF]
data_LaMg2Cu9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.038
_cell_length_b   5.038
_cell_length_c   16.041
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.992
_symmetry_Int_Tables_number   1
_cell_volume   352.611
_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
  La  La0  1  0.333  0.667  0.750  1.0
  La  La1  1  0.667  0.333  0.250  1.0
  Mg  Mg2  1  0.333  0.667  0.530  1.0
  Mg  Mg3  1  0.667  0.333  0.030  1.0
  Mg  Mg4  1  0.667  0.333  0.470  1.0
  Mg  Mg5  1  0.333  0.667  0.970  1.0
  Cu  Cu6  1  1.000  0.000  1.000  1.0
  Cu  Cu7  1  1.000  1.000  0.500  1.0
  Cu  Cu8  1  0.000  1.000  0.250  1.0
  Cu  Cu9  1  1.000  0.000  0.750  1.0
  Cu  Cu10  1  0.333  0.667  0.250  1.0
  Cu  Cu11  1  0.667  0.333  0.750  1.0
  Cu  Cu12  1  0.168  0.335  0.122  1.0
  Cu  Cu13  1  0.832  0.168  0.622  1.0
  Cu  Cu14  1  0.335  0.168  0.622  1.0
  Cu  Cu15  1  0.665  0.832  0.122  1.0
  Cu  Cu16  1  0.168  0.832  0.122  1.0
  Cu  Cu17  1  0.832  0.665  0.878  1.0
  Cu  Cu18  1  0.832  0.168  0.878  1.0
  Cu  Cu19  1  0.832  0.665  0.622  1.0
  Cu  Cu20  1  0.335  0.168  0.878  1.0
  Cu  Cu21  1  0.665  0.832  0.378  1.0
  Cu  Cu22  1  0.168  0.335  0.378  1.0
  Cu  Cu23  1  0.168  0.832  0.378  1.0
[/CIF]
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