The material described by SmNiSi2 crystallizes in the orthorhombic Cmcm space group. Sm(1) is bonded in a 14-coordinate geometry to four equivalent Ni(1), four equivalent Si(2), and six equivalent Si(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Si(1), and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six equivalent Sm(1), one Ni(1), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to four equivalent Sm(1) and four equivalent Ni(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmSi2Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.010
_cell_length_b   4.088
_cell_length_c   8.425
_cell_angle_alpha   104.042
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   133.992
_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  0.250  0.394  0.787  1.0
  Sm  Sm1  1  0.750  0.606  0.213  1.0
  Si  Si2  1  0.250  0.041  0.082  1.0
  Si  Si3  1  0.750  0.959  0.918  1.0
  Si  Si4  1  0.250  0.750  0.500  1.0
  Si  Si5  1  0.750  0.250  0.500  1.0
  Ni  Ni6  1  0.250  0.180  0.361  1.0
  Ni  Ni7  1  0.750  0.820  0.639  1.0
[/CIF]
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The material described by SmNiSi2 crystallizes in the orthorhombic Cmcm space group. Sm(1) is bonded in a 14-coordinate geometry to four equivalent Ni(1), four equivalent Si(2), and six equivalent Si(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Si(1), and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six equivalent Sm(1), one Ni(1), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to four equivalent Sm(1) and four equivalent Ni(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmSi2Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.010
_cell_length_b   4.088
_cell_length_c   8.425
_cell_angle_alpha   104.042
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   133.992
_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  0.250  0.394  0.787  1.0
  Sm  Sm1  1  0.750  0.606  0.213  1.0
  Si  Si2  1  0.250  0.041  0.082  1.0
  Si  Si3  1  0.750  0.959  0.918  1.0
  Si  Si4  1  0.250  0.750  0.500  1.0
  Si  Si5  1  0.750  0.250  0.500  1.0
  Ni  Ni6  1  0.250  0.180  0.361  1.0
  Ni  Ni7  1  0.750  0.820  0.639  1.0
[/CIF]
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