The material structure described by Sm2GeSi3 is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Imm2 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to four equivalent Ge(1), two equivalent Si(2), two equivalent Si(3), and four equivalent Si(1) atoms to form SmSi8Ge4 cuboctahedra that share edges with four equivalent Sm(1)Si8Ge4 cuboctahedra, edges with eight equivalent Sm(2)Si10Ge2 cuboctahedra, faces with four equivalent Sm(2)Si10Ge2 cuboctahedra, and faces with four equivalent Sm(1)Si8Ge4 cuboctahedra. In the second Sm site, Sm(2) is bonded to two equivalent Ge(1), two equivalent Si(1), four equivalent Si(2), and four equivalent Si(3) atoms to form SmSi10Ge2 cuboctahedra that share edges with four equivalent Sm(2)Si10Ge2 cuboctahedra, edges with eight equivalent Sm(1)Si8Ge4 cuboctahedra, faces with four equivalent Sm(2)Si10Ge2 cuboctahedra, and faces with four equivalent Sm(1)Si8Ge4 cuboctahedra. Ge(1) is bonded in a 9-coordinate geometry to two equivalent Sm(2), four equivalent Sm(1), one Si(1), and two equivalent Si(3) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Sm(2), four equivalent Sm(1), one Ge(1), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Sm(1), four equivalent Sm(2), one Si(3), and two equivalent Si(1) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Sm(1), four equivalent Sm(2), two equivalent Ge(1), and one Si(2) atom. is represented by the CIF card [CIF]
data_Sm2Si3Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.029
_cell_length_b   4.077
_cell_length_c   8.139
_cell_angle_alpha   75.497
_cell_angle_beta   75.670
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   125.127
_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
  Sm  Sm0  1  0.878  0.628  0.743  1.0
  Sm  Sm1  1  0.123  0.373  0.254  1.0
  Si  Si2  1  0.463  0.213  0.574  1.0
  Si  Si3  1  0.542  0.792  0.417  1.0
  Si  Si4  1  0.700  0.950  0.101  1.0
  Ge  Ge5  1  0.294  0.044  0.912  1.0
[/CIF]
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The material structure described by Sm2GeSi3 is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Imm2 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to four equivalent Ge(1), two equivalent Si(2), two equivalent Si(3), and four equivalent Si(1) atoms to form SmSi8Ge4 cuboctahedra that share edges with four equivalent Sm(1)Si8Ge4 cuboctahedra, edges with eight equivalent Sm(2)Si10Ge2 cuboctahedra, faces with four equivalent Sm(2)Si10Ge2 cuboctahedra, and faces with four equivalent Sm(1)Si8Ge4 cuboctahedra. In the second Sm site, Sm(2) is bonded to two equivalent Ge(1), two equivalent Si(1), four equivalent Si(2), and four equivalent Si(3) atoms to form SmSi10Ge2 cuboctahedra that share edges with four equivalent Sm(2)Si10Ge2 cuboctahedra, edges with eight equivalent Sm(1)Si8Ge4 cuboctahedra, faces with four equivalent Sm(2)Si10Ge2 cuboctahedra, and faces with four equivalent Sm(1)Si8Ge4 cuboctahedra. Ge(1) is bonded in a 9-coordinate geometry to two equivalent Sm(2), four equivalent Sm(1), one Si(1), and two equivalent Si(3) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Sm(2), four equivalent Sm(1), one Ge(1), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Sm(1), four equivalent Sm(2), one Si(3), and two equivalent Si(1) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Sm(1), four equivalent Sm(2), two equivalent Ge(1), and one Si(2) atom. is represented by the CIF card [CIF]
data_Sm2Si3Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.029
_cell_length_b   4.077
_cell_length_c   8.139
_cell_angle_alpha   75.497
_cell_angle_beta   75.670
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   125.127
_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
  Sm  Sm0  1  0.878  0.628  0.743  1.0
  Sm  Sm1  1  0.123  0.373  0.254  1.0
  Si  Si2  1  0.463  0.213  0.574  1.0
  Si  Si3  1  0.542  0.792  0.417  1.0
  Si  Si4  1  0.700  0.950  0.101  1.0
  Ge  Ge5  1  0.294  0.044  0.912  1.0
[/CIF]
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