The compound described by Li2EuSiO4 is Chalcostibite-derived structured and crystallizes in the trigonal P3_121 space group. Li(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form LiO4 tetrahedra that share corners with four equivalent Li(1)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. Eu(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with eight equivalent Li(1)O4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Li(1), two equivalent Eu(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Li(1), two equivalent Eu(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Li2EuSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.051
_cell_length_b   5.051
_cell_length_c   12.488
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   275.901
_cell_formula_units_Z   3
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
  Li  Li0  1  0.407  0.073  0.079  1.0
  Li  Li1  1  0.927  0.334  0.413  1.0
  Li  Li2  1  0.666  0.593  0.746  1.0
  Li  Li3  1  0.334  0.927  0.587  1.0
  Li  Li4  1  0.593  0.666  0.254  1.0
  Li  Li5  1  0.073  0.407  0.921  1.0
  Eu  Eu6  1  0.000  0.421  0.167  1.0
  Eu  Eu7  1  0.421  0.000  0.833  1.0
  Eu  Eu8  1  0.579  0.579  0.500  1.0
  Si  Si9  1  0.723  0.723  0.000  1.0
  Si  Si10  1  0.000  0.277  0.667  1.0
  Si  Si11  1  0.277  0.000  0.333  1.0
  O  O12  1  0.239  0.308  0.329  1.0
  O  O13  1  0.069  0.761  0.996  1.0
  O  O14  1  0.549  0.514  0.107  1.0
  O  O15  1  0.692  0.931  0.663  1.0
  O  O16  1  0.308  0.239  0.671  1.0
  O  O17  1  0.931  0.692  0.337  1.0
  O  O18  1  0.036  0.486  0.560  1.0
  O  O19  1  0.486  0.036  0.440  1.0
  O  O20  1  0.964  0.451  0.773  1.0
  O  O21  1  0.514  0.549  0.893  1.0
  O  O22  1  0.451  0.964  0.227  1.0
  O  O23  1  0.761  0.069  0.004  1.0
[/CIF]
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The compound described by Li2EuSiO4 is Chalcostibite-derived structured and crystallizes in the trigonal P3_121 space group. Li(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form LiO4 tetrahedra that share corners with four equivalent Li(1)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. Eu(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with eight equivalent Li(1)O4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Li(1), two equivalent Eu(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Li(1), two equivalent Eu(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Li2EuSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.051
_cell_length_b   5.051
_cell_length_c   12.488
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   275.901
_cell_formula_units_Z   3
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
  Li  Li0  1  0.407  0.073  0.079  1.0
  Li  Li1  1  0.927  0.334  0.413  1.0
  Li  Li2  1  0.666  0.593  0.746  1.0
  Li  Li3  1  0.334  0.927  0.587  1.0
  Li  Li4  1  0.593  0.666  0.254  1.0
  Li  Li5  1  0.073  0.407  0.921  1.0
  Eu  Eu6  1  0.000  0.421  0.167  1.0
  Eu  Eu7  1  0.421  0.000  0.833  1.0
  Eu  Eu8  1  0.579  0.579  0.500  1.0
  Si  Si9  1  0.723  0.723  0.000  1.0
  Si  Si10  1  0.000  0.277  0.667  1.0
  Si  Si11  1  0.277  0.000  0.333  1.0
  O  O12  1  0.239  0.308  0.329  1.0
  O  O13  1  0.069  0.761  0.996  1.0
  O  O14  1  0.549  0.514  0.107  1.0
  O  O15  1  0.692  0.931  0.663  1.0
  O  O16  1  0.308  0.239  0.671  1.0
  O  O17  1  0.931  0.692  0.337  1.0
  O  O18  1  0.036  0.486  0.560  1.0
  O  O19  1  0.486  0.036  0.440  1.0
  O  O20  1  0.964  0.451  0.773  1.0
  O  O21  1  0.514  0.549  0.893  1.0
  O  O22  1  0.451  0.964  0.227  1.0
  O  O23  1  0.761  0.069  0.004  1.0
[/CIF]
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