The material structure described by SrEu3 is beta Cu3Ti-like structured and crystallizes in the orthorhombic Cmcm space group. Sr(1) is bonded to four equivalent Eu(2) and eight equivalent Eu(1) atoms to form SrEu12 cuboctahedra that share corners with four equivalent Eu(2)Sr4Eu8 cuboctahedra, corners with six equivalent Sr(1)Eu12 cuboctahedra, corners with eight equivalent Eu(1)Sr4Eu8 cuboctahedra, edges with six equivalent Eu(2)Sr4Eu8 cuboctahedra, edges with twelve equivalent Eu(1)Sr4Eu8 cuboctahedra, faces with four equivalent Eu(2)Sr4Eu8 cuboctahedra, faces with eight equivalent Sr(1)Eu12 cuboctahedra, and faces with eight equivalent Eu(1)Sr4Eu8 cuboctahedra. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to four equivalent Sr(1), four equivalent Eu(1), and four equivalent Eu(2) atoms to form distorted EuSr4Eu8 cuboctahedra that share corners with four equivalent Sr(1)Eu12 cuboctahedra, corners with four equivalent Eu(2)Sr4Eu8 cuboctahedra, corners with ten equivalent Eu(1)Sr4Eu8 cuboctahedra, edges with six equivalent Sr(1)Eu12 cuboctahedra, edges with six equivalent Eu(1)Sr4Eu8 cuboctahedra, edges with six equivalent Eu(2)Sr4Eu8 cuboctahedra, faces with four equivalent Sr(1)Eu12 cuboctahedra, faces with four equivalent Eu(2)Sr4Eu8 cuboctahedra, and faces with twelve equivalent Eu(1)Sr4Eu8 cuboctahedra. In the second Eu site, Eu(2) is bonded to four equivalent Sr(1) and eight equivalent Eu(1) atoms to form distorted EuSr4Eu8 cuboctahedra that share corners with four equivalent Sr(1)Eu12 cuboctahedra, corners with six equivalent Eu(2)Sr4Eu8 cuboctahedra, corners with eight equivalent Eu(1)Sr4Eu8 cuboctahedra, edges with six equivalent Sr(1)Eu12 cuboctahedra, edges with twelve equivalent Eu(1)Sr4Eu8 cuboctahedra, faces with four equivalent Sr(1)Eu12 cuboctahedra, faces with eight equivalent Eu(1)Sr4Eu8 cuboctahedra, and faces with eight equivalent Eu(2)Sr4Eu8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrEu3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.275
_cell_length_b   8.299
_cell_length_c   6.477
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.098
_symmetry_Int_Tables_number   1
_cell_volume   384.833
_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
  Sr  Sr0  1  0.331  0.665  0.750  1.0
  Sr  Sr1  1  0.669  0.335  0.250  1.0
  Eu  Eu2  1  0.160  0.316  0.250  1.0
  Eu  Eu3  1  0.680  0.840  0.250  1.0
  Eu  Eu4  1  0.160  0.843  0.250  1.0
  Eu  Eu5  1  0.840  0.684  0.750  1.0
  Eu  Eu6  1  0.320  0.160  0.750  1.0
  Eu  Eu7  1  0.840  0.157  0.750  1.0
[/CIF]
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The material structure described by SrEu3 is beta Cu3Ti-like structured and crystallizes in the orthorhombic Cmcm space group. Sr(1) is bonded to four equivalent Eu(2) and eight equivalent Eu(1) atoms to form SrEu12 cuboctahedra that share corners with four equivalent Eu(2)Sr4Eu8 cuboctahedra, corners with six equivalent Sr(1)Eu12 cuboctahedra, corners with eight equivalent Eu(1)Sr4Eu8 cuboctahedra, edges with six equivalent Eu(2)Sr4Eu8 cuboctahedra, edges with twelve equivalent Eu(1)Sr4Eu8 cuboctahedra, faces with four equivalent Eu(2)Sr4Eu8 cuboctahedra, faces with eight equivalent Sr(1)Eu12 cuboctahedra, and faces with eight equivalent Eu(1)Sr4Eu8 cuboctahedra. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to four equivalent Sr(1), four equivalent Eu(1), and four equivalent Eu(2) atoms to form distorted EuSr4Eu8 cuboctahedra that share corners with four equivalent Sr(1)Eu12 cuboctahedra, corners with four equivalent Eu(2)Sr4Eu8 cuboctahedra, corners with ten equivalent Eu(1)Sr4Eu8 cuboctahedra, edges with six equivalent Sr(1)Eu12 cuboctahedra, edges with six equivalent Eu(1)Sr4Eu8 cuboctahedra, edges with six equivalent Eu(2)Sr4Eu8 cuboctahedra, faces with four equivalent Sr(1)Eu12 cuboctahedra, faces with four equivalent Eu(2)Sr4Eu8 cuboctahedra, and faces with twelve equivalent Eu(1)Sr4Eu8 cuboctahedra. In the second Eu site, Eu(2) is bonded to four equivalent Sr(1) and eight equivalent Eu(1) atoms to form distorted EuSr4Eu8 cuboctahedra that share corners with four equivalent Sr(1)Eu12 cuboctahedra, corners with six equivalent Eu(2)Sr4Eu8 cuboctahedra, corners with eight equivalent Eu(1)Sr4Eu8 cuboctahedra, edges with six equivalent Sr(1)Eu12 cuboctahedra, edges with twelve equivalent Eu(1)Sr4Eu8 cuboctahedra, faces with four equivalent Sr(1)Eu12 cuboctahedra, faces with eight equivalent Eu(1)Sr4Eu8 cuboctahedra, and faces with eight equivalent Eu(2)Sr4Eu8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrEu3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.275
_cell_length_b   8.299
_cell_length_c   6.477
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.098
_symmetry_Int_Tables_number   1
_cell_volume   384.833
_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
  Sr  Sr0  1  0.331  0.665  0.750  1.0
  Sr  Sr1  1  0.669  0.335  0.250  1.0
  Eu  Eu2  1  0.160  0.316  0.250  1.0
  Eu  Eu3  1  0.680  0.840  0.250  1.0
  Eu  Eu4  1  0.160  0.843  0.250  1.0
  Eu  Eu5  1  0.840  0.684  0.750  1.0
  Eu  Eu6  1  0.320  0.160  0.750  1.0
  Eu  Eu7  1  0.840  0.157  0.750  1.0
[/CIF]
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