The material described by Sm4Ge7 crystallizes in the orthorhombic C222_1 space group. There are three inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 9-coordinate geometry to one Ge(4), two equivalent Ge(1), two equivalent Ge(3), and four equivalent Ge(2) atoms. In the second Sm site, Sm(2) is bonded in a 10-coordinate geometry to two equivalent Ge(2), two equivalent Ge(3), two equivalent Ge(4), and four equivalent Ge(1) atoms. In the third Sm site, Sm(3) is bonded in a 10-coordinate geometry to two equivalent Ge(2), two equivalent Ge(3), two equivalent Ge(4), and four equivalent Ge(1) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), two equivalent Sm(3), one Ge(1), one Ge(2), and one Ge(3) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Sm(2), one Sm(3), four equivalent Sm(1), one Ge(1), one Ge(3), and one Ge(4) atom. In the third Ge site, Ge(3) is bonded in a 4-coordinate geometry to one Sm(2), one Sm(3), two equivalent Sm(1), one Ge(1), and one Ge(2) atom. In the fourth Ge site, Ge(4) is bonded in a 8-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), two equivalent Sm(3), and two equivalent Ge(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sm4Ge7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.519
_cell_length_b   7.519
_cell_length_c   11.919
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   133.338
_symmetry_Int_Tables_number   1
_cell_volume   490.111
_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  0.492  0.982  0.381  1.0
  Sm  Sm1  1  0.982  0.492  0.619  1.0
  Sm  Sm2  1  0.508  0.018  0.881  1.0
  Sm  Sm3  1  0.018  0.508  0.119  1.0
  Sm  Sm4  1  0.996  0.004  0.250  1.0
  Sm  Sm5  1  0.004  0.996  0.750  1.0
  Sm  Sm6  1  0.488  0.488  0.500  1.0
  Sm  Sm7  1  0.512  0.512  0.000  1.0
  Ge  Ge8  1  0.929  0.106  0.990  1.0
  Ge  Ge9  1  0.106  0.929  0.010  1.0
  Ge  Ge10  1  0.071  0.894  0.490  1.0
  Ge  Ge11  1  0.894  0.071  0.510  1.0
  Ge  Ge12  1  0.574  0.918  0.129  1.0
  Ge  Ge13  1  0.918  0.574  0.871  1.0
  Ge  Ge14  1  0.426  0.082  0.629  1.0
  Ge  Ge15  1  0.082  0.426  0.371  1.0
  Ge  Ge16  1  0.477  0.181  0.164  1.0
  Ge  Ge17  1  0.181  0.477  0.836  1.0
  Ge  Ge18  1  0.523  0.819  0.664  1.0
  Ge  Ge19  1  0.819  0.523  0.336  1.0
  Ge  Ge20  1  0.438  0.562  0.250  1.0
  Ge  Ge21  1  0.562  0.438  0.750  1.0
[/CIF]
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The material described by Sm4Ge7 crystallizes in the orthorhombic C222_1 space group. There are three inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 9-coordinate geometry to one Ge(4), two equivalent Ge(1), two equivalent Ge(3), and four equivalent Ge(2) atoms. In the second Sm site, Sm(2) is bonded in a 10-coordinate geometry to two equivalent Ge(2), two equivalent Ge(3), two equivalent Ge(4), and four equivalent Ge(1) atoms. In the third Sm site, Sm(3) is bonded in a 10-coordinate geometry to two equivalent Ge(2), two equivalent Ge(3), two equivalent Ge(4), and four equivalent Ge(1) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), two equivalent Sm(3), one Ge(1), one Ge(2), and one Ge(3) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Sm(2), one Sm(3), four equivalent Sm(1), one Ge(1), one Ge(3), and one Ge(4) atom. In the third Ge site, Ge(3) is bonded in a 4-coordinate geometry to one Sm(2), one Sm(3), two equivalent Sm(1), one Ge(1), and one Ge(2) atom. In the fourth Ge site, Ge(4) is bonded in a 8-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), two equivalent Sm(3), and two equivalent Ge(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sm4Ge7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.519
_cell_length_b   7.519
_cell_length_c   11.919
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   133.338
_symmetry_Int_Tables_number   1
_cell_volume   490.111
_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  0.492  0.982  0.381  1.0
  Sm  Sm1  1  0.982  0.492  0.619  1.0
  Sm  Sm2  1  0.508  0.018  0.881  1.0
  Sm  Sm3  1  0.018  0.508  0.119  1.0
  Sm  Sm4  1  0.996  0.004  0.250  1.0
  Sm  Sm5  1  0.004  0.996  0.750  1.0
  Sm  Sm6  1  0.488  0.488  0.500  1.0
  Sm  Sm7  1  0.512  0.512  0.000  1.0
  Ge  Ge8  1  0.929  0.106  0.990  1.0
  Ge  Ge9  1  0.106  0.929  0.010  1.0
  Ge  Ge10  1  0.071  0.894  0.490  1.0
  Ge  Ge11  1  0.894  0.071  0.510  1.0
  Ge  Ge12  1  0.574  0.918  0.129  1.0
  Ge  Ge13  1  0.918  0.574  0.871  1.0
  Ge  Ge14  1  0.426  0.082  0.629  1.0
  Ge  Ge15  1  0.082  0.426  0.371  1.0
  Ge  Ge16  1  0.477  0.181  0.164  1.0
  Ge  Ge17  1  0.181  0.477  0.836  1.0
  Ge  Ge18  1  0.523  0.819  0.664  1.0
  Ge  Ge19  1  0.819  0.523  0.336  1.0
  Ge  Ge20  1  0.438  0.562  0.250  1.0
  Ge  Ge21  1  0.562  0.438  0.750  1.0
[/CIF]
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