data_AcEu2Y
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.1
_cell_length_b   6.1
_cell_length_c   6.1
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AcEu2Y
_chemical_formula_sum   'Ac1 Eu2 Y1'
_cell_volume   160.21
_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  0.31  0.31  0.31  1.0
  Eu  Eu1  1  0.16  0.16  0.16  1.0
  Eu  Eu2  1  0.47  0.47  0.47  1.0
  Y  Y3  1  0.0  0.0  0.0  1.0

data_AcEu2Y
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.1
_cell_length_b   6.1
_cell_length_c   14.93
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   AcEu2Y
_chemical_formula_sum   'Ac3 Eu6 Y3'
_cell_volume   480.64
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.69  1.0
  Eu  Eu1  3  0.0  0.0  0.53  1.0
  Eu  Eu2  3  0.0  0.0  0.84  1.0
  Y  Y3  3  0.0  0.0  0.0  1.0

Ac Eu Eu Y
AcEu2Y crystallizes in the trigonal R3m space group. Ac(1) is bonded in a distorted linear geometry to one Eu(1), one Eu(2), and three equivalent Y(1) atoms. The Ac(1)-Eu(1) bond length is 2.32 Å. The Ac(1)-Eu(2) bond length is 2.32 Å. All Ac(1)-Y(1) bond lengths are 3.54 Å. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a distorted linear geometry to one Ac(1) and one Y(1) atom. The Eu(1)-Y(1) bond length is 2.32 Å. In the second Eu site, Eu(2) is bonded in a single-bond geometry to one Ac(1) atom. Y(1) is bonded to three equivalent Ac(1) and one Eu(1) atom to form distorted corner-sharing YAc3Eu trigonal pyramids.