The material described by Ac3Zn is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Ac sites. In the first Ac site, Ac(1) is bonded to four equivalent Ac(1), four equivalent Ac(2), and four equivalent Zn(1) atoms to form distorted AcAc8Zn4 cuboctahedra that share corners with twelve equivalent Ac(1)Ac8Zn4 cuboctahedra, edges with eight equivalent Ac(1)Ac8Zn4 cuboctahedra, edges with eight equivalent Zn(1)Ac12 cuboctahedra, faces with four equivalent Zn(1)Ac12 cuboctahedra, and faces with ten equivalent Ac(1)Ac8Zn4 cuboctahedra. In the second Ac site, Ac(2) is bonded in a distorted square co-planar geometry to eight equivalent Ac(1) and four equivalent Zn(1) atoms. Zn(1) is bonded to four equivalent Ac(2) and eight equivalent Ac(1) atoms to form ZnAc12 cuboctahedra that share corners with four equivalent Zn(1)Ac12 cuboctahedra, edges with eight equivalent Zn(1)Ac12 cuboctahedra, edges with sixteen equivalent Ac(1)Ac8Zn4 cuboctahedra, faces with four equivalent Zn(1)Ac12 cuboctahedra, and faces with eight equivalent Ac(1)Ac8Zn4 cuboctahedra. is represented by the CIF card [CIF]
data_Ac3Zn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.655
_cell_length_b   6.655
_cell_length_c   6.655
_cell_angle_alpha   134.466
_cell_angle_beta   134.466
_cell_angle_gamma   66.361
_symmetry_Int_Tables_number   1
_cell_volume   147.790
_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
  Ac  Ac0  1  0.750  0.250  0.500  1.0
  Ac  Ac1  1  0.250  0.750  0.500  1.0
  Ac  Ac2  1  0.500  0.500  0.000  1.0
  Zn  Zn3  1  0.000  0.000  0.000  1.0
[/CIF]
.
The material described by Ac3Zn is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Ac sites. In the first Ac site, Ac(1) is bonded to four equivalent Ac(1), four equivalent Ac(2), and four equivalent Zn(1) atoms to form distorted AcAc8Zn4 cuboctahedra that share corners with twelve equivalent Ac(1)Ac8Zn4 cuboctahedra, edges with eight equivalent Ac(1)Ac8Zn4 cuboctahedra, edges with eight equivalent Zn(1)Ac12 cuboctahedra, faces with four equivalent Zn(1)Ac12 cuboctahedra, and faces with ten equivalent Ac(1)Ac8Zn4 cuboctahedra. In the second Ac site, Ac(2) is bonded in a distorted square co-planar geometry to eight equivalent Ac(1) and four equivalent Zn(1) atoms. Zn(1) is bonded to four equivalent Ac(2) and eight equivalent Ac(1) atoms to form ZnAc12 cuboctahedra that share corners with four equivalent Zn(1)Ac12 cuboctahedra, edges with eight equivalent Zn(1)Ac12 cuboctahedra, edges with sixteen equivalent Ac(1)Ac8Zn4 cuboctahedra, faces with four equivalent Zn(1)Ac12 cuboctahedra, and faces with eight equivalent Ac(1)Ac8Zn4 cuboctahedra. is represented by the CIF card [CIF]
data_Ac3Zn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.655
_cell_length_b   6.655
_cell_length_c   6.655
_cell_angle_alpha   134.466
_cell_angle_beta   134.466
_cell_angle_gamma   66.361
_symmetry_Int_Tables_number   1
_cell_volume   147.790
_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
  Ac  Ac0  1  0.750  0.250  0.500  1.0
  Ac  Ac1  1  0.250  0.750  0.500  1.0
  Ac  Ac2  1  0.500  0.500  0.000  1.0
  Zn  Zn3  1  0.000  0.000  0.000  1.0
[/CIF]
.