The compound described by Ba2Eu3Si7 crystallizes in the hexagonal P-62m space group. Ba(1) is bonded in a 9-coordinate geometry to three equivalent Si(2) and six equivalent Si(3) atoms. Eu(1) is bonded in a 9-coordinate geometry to two equivalent Si(1), three equivalent Si(3), and four equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six equivalent Eu(1) and three equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Ba(1), four equivalent Eu(1), one Si(1), and two equivalent Si(3) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to four equivalent Ba(1), three equivalent Eu(1), and two equivalent Si(2) atoms. is represented by the CIF file [CIF]
data_Ba2Eu3Si7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.285
_cell_length_b   9.285
_cell_length_c   4.107
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   306.635
_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
  Ba  Ba0  1  0.333  0.667  0.000  1.0
  Ba  Ba1  1  0.667  0.333  0.000  1.0
  Eu  Eu2  1  0.000  0.746  0.500  1.0
  Eu  Eu3  1  0.254  0.254  0.500  1.0
  Eu  Eu4  1  0.746  1.000  0.500  1.0
  Si  Si5  1  0.000  1.000  0.000  1.0
  Si  Si6  1  0.000  0.257  0.000  1.0
  Si  Si7  1  0.743  0.743  0.000  1.0
  Si  Si8  1  0.257  1.000  0.000  1.0
  Si  Si9  1  0.000  0.398  0.500  1.0
  Si  Si10  1  0.602  0.602  0.500  1.0
  Si  Si11  1  0.398  0.000  0.500  1.0
[/CIF]
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The compound described by Ba2Eu3Si7 crystallizes in the hexagonal P-62m space group. Ba(1) is bonded in a 9-coordinate geometry to three equivalent Si(2) and six equivalent Si(3) atoms. Eu(1) is bonded in a 9-coordinate geometry to two equivalent Si(1), three equivalent Si(3), and four equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six equivalent Eu(1) and three equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Ba(1), four equivalent Eu(1), one Si(1), and two equivalent Si(3) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to four equivalent Ba(1), three equivalent Eu(1), and two equivalent Si(2) atoms. is represented by the CIF file [CIF]
data_Ba2Eu3Si7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.285
_cell_length_b   9.285
_cell_length_c   4.107
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   306.635
_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
  Ba  Ba0  1  0.333  0.667  0.000  1.0
  Ba  Ba1  1  0.667  0.333  0.000  1.0
  Eu  Eu2  1  0.000  0.746  0.500  1.0
  Eu  Eu3  1  0.254  0.254  0.500  1.0
  Eu  Eu4  1  0.746  1.000  0.500  1.0
  Si  Si5  1  0.000  1.000  0.000  1.0
  Si  Si6  1  0.000  0.257  0.000  1.0
  Si  Si7  1  0.743  0.743  0.000  1.0
  Si  Si8  1  0.257  1.000  0.000  1.0
  Si  Si9  1  0.000  0.398  0.500  1.0
  Si  Si10  1  0.602  0.602  0.500  1.0
  Si  Si11  1  0.398  0.000  0.500  1.0
[/CIF]
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