The compound described by SmB2C2 crystallizes in the tetragonal P4/mbm space group. Sm(1) is bonded in a 16-coordinate geometry to eight equivalent B(1) and eight equivalent C(1) atoms. B(1) is bonded in a distorted trigonal planar geometry to four equivalent Sm(1) and three equivalent C(1) atoms. C(1) is bonded in a 3-coordinate geometry to four equivalent Sm(1) and three equivalent B(1) atoms. is represented by the CIF file [CIF]
data_Sm(BC)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.736
_cell_length_b   5.362
_cell_length_c   5.362
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   107.403
_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
  Sm  Sm0  1  0.000  0.500  0.500  1.0
  Sm  Sm1  1  0.000  0.000  0.000  1.0
  B  B2  1  0.500  0.637  0.137  1.0
  B  B3  1  0.500  0.863  0.637  1.0
  B  B4  1  0.500  0.137  0.363  1.0
  B  B5  1  0.500  0.363  0.863  1.0
  C  C6  1  0.500  0.662  0.838  1.0
  C  C7  1  0.500  0.838  0.338  1.0
  C  C8  1  0.500  0.338  0.162  1.0
  C  C9  1  0.500  0.162  0.662  1.0
[/CIF]
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The compound described by SmB2C2 crystallizes in the tetragonal P4/mbm space group. Sm(1) is bonded in a 16-coordinate geometry to eight equivalent B(1) and eight equivalent C(1) atoms. B(1) is bonded in a distorted trigonal planar geometry to four equivalent Sm(1) and three equivalent C(1) atoms. C(1) is bonded in a 3-coordinate geometry to four equivalent Sm(1) and three equivalent B(1) atoms. is represented by the CIF file [CIF]
data_Sm(BC)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.736
_cell_length_b   5.362
_cell_length_c   5.362
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   107.403
_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
  Sm  Sm0  1  0.000  0.500  0.500  1.0
  Sm  Sm1  1  0.000  0.000  0.000  1.0
  B  B2  1  0.500  0.637  0.137  1.0
  B  B3  1  0.500  0.863  0.637  1.0
  B  B4  1  0.500  0.137  0.363  1.0
  B  B5  1  0.500  0.363  0.863  1.0
  C  C6  1  0.500  0.662  0.838  1.0
  C  C7  1  0.500  0.838  0.338  1.0
  C  C8  1  0.500  0.338  0.162  1.0
  C  C9  1  0.500  0.162  0.662  1.0
[/CIF]
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