The structure described by Ac3Eu is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Ac(1) is bonded to eight equivalent Ac(1) and four equivalent Eu(1) atoms to form AcAc8Eu4 cuboctahedra that share corners with four equivalent Eu(1)Ac12 cuboctahedra, corners with fourteen equivalent Ac(1)Ac8Eu4 cuboctahedra, edges with six equivalent Eu(1)Ac12 cuboctahedra, edges with twelve equivalent Ac(1)Ac8Eu4 cuboctahedra, faces with four equivalent Eu(1)Ac12 cuboctahedra, and faces with sixteen equivalent Ac(1)Ac8Eu4 cuboctahedra. Eu(1) is bonded to twelve equivalent Ac(1) atoms to form EuAc12 cuboctahedra that share corners with six equivalent Eu(1)Ac12 cuboctahedra, corners with twelve equivalent Ac(1)Ac8Eu4 cuboctahedra, edges with eighteen equivalent Ac(1)Ac8Eu4 cuboctahedra, faces with eight equivalent Eu(1)Ac12 cuboctahedra, and faces with twelve equivalent Ac(1)Ac8Eu4 cuboctahedra. is represented by the CIF file [CIF]
data_Ac3Eu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.069
_cell_length_b   8.069
_cell_length_c   6.605
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   372.488
_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
  Ac  Ac0  1  0.168  0.335  0.250  1.0
  Ac  Ac1  1  0.665  0.832  0.250  1.0
  Ac  Ac2  1  0.168  0.832  0.250  1.0
  Ac  Ac3  1  0.832  0.665  0.750  1.0
  Ac  Ac4  1  0.335  0.168  0.750  1.0
  Ac  Ac5  1  0.832  0.168  0.750  1.0
  Eu  Eu6  1  0.333  0.667  0.750  1.0
  Eu  Eu7  1  0.667  0.333  0.250  1.0
[/CIF]
.
The structure described by Ac3Eu is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Ac(1) is bonded to eight equivalent Ac(1) and four equivalent Eu(1) atoms to form AcAc8Eu4 cuboctahedra that share corners with four equivalent Eu(1)Ac12 cuboctahedra, corners with fourteen equivalent Ac(1)Ac8Eu4 cuboctahedra, edges with six equivalent Eu(1)Ac12 cuboctahedra, edges with twelve equivalent Ac(1)Ac8Eu4 cuboctahedra, faces with four equivalent Eu(1)Ac12 cuboctahedra, and faces with sixteen equivalent Ac(1)Ac8Eu4 cuboctahedra. Eu(1) is bonded to twelve equivalent Ac(1) atoms to form EuAc12 cuboctahedra that share corners with six equivalent Eu(1)Ac12 cuboctahedra, corners with twelve equivalent Ac(1)Ac8Eu4 cuboctahedra, edges with eighteen equivalent Ac(1)Ac8Eu4 cuboctahedra, faces with eight equivalent Eu(1)Ac12 cuboctahedra, and faces with twelve equivalent Ac(1)Ac8Eu4 cuboctahedra. is represented by the CIF file [CIF]
data_Ac3Eu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.069
_cell_length_b   8.069
_cell_length_c   6.605
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   372.488
_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
  Ac  Ac0  1  0.168  0.335  0.250  1.0
  Ac  Ac1  1  0.665  0.832  0.250  1.0
  Ac  Ac2  1  0.168  0.832  0.250  1.0
  Ac  Ac3  1  0.832  0.665  0.750  1.0
  Ac  Ac4  1  0.335  0.168  0.750  1.0
  Ac  Ac5  1  0.832  0.168  0.750  1.0
  Eu  Eu6  1  0.333  0.667  0.750  1.0
  Eu  Eu7  1  0.667  0.333  0.250  1.0
[/CIF]
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