The compound described by Sm2Zn17 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 18-coordinate geometry to six equivalent Zn(3) and twelve equivalent Zn(4) atoms. In the second Sm site, Sm(2) is bonded in a 20-coordinate geometry to two equivalent Zn(1), six equivalent Zn(2), six equivalent Zn(3), and six equivalent Zn(4) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 14-coordinate geometry to one Sm(2), one Zn(1), three equivalent Zn(2), three equivalent Zn(4), and six equivalent Zn(3) atoms. In the second Zn site, Zn(2) is bonded to two equivalent Sm(2), two equivalent Zn(1), four equivalent Zn(3), and four equivalent Zn(4) atoms to form ZnSm2Zn10 cuboctahedra that share corners with four equivalent Zn(2)Sm2Zn10 cuboctahedra, corners with eight equivalent Zn(3)Sm2Zn10 cuboctahedra, corners with ten equivalent Zn(4)Sm3Zn9 cuboctahedra, edges with four equivalent Zn(3)Sm2Zn10 cuboctahedra, edges with six equivalent Zn(4)Sm3Zn9 cuboctahedra, faces with four equivalent Zn(4)Sm3Zn9 cuboctahedra, faces with six equivalent Zn(2)Sm2Zn10 cuboctahedra, and faces with eight equivalent Zn(3)Sm2Zn10 cuboctahedra. In the third Zn site, Zn(3) is bonded to one Sm(1), one Sm(2), two equivalent Zn(1), two equivalent Zn(2), two equivalent Zn(3), and four equivalent Zn(4) atoms to form distorted ZnSm2Zn10 cuboctahedra that share corners with four equivalent Zn(2)Sm2Zn10 cuboctahedra, corners with eight equivalent Zn(4)Sm3Zn9 cuboctahedra, corners with twelve equivalent Zn(3)Sm2Zn10 cuboctahedra,  an edgeedge with one Zn(3)Sm2Zn10 cuboctahedra, edges with two equivalent Zn(2)Sm2Zn10 cuboctahedra, edges with two equivalent Zn(4)Sm3Zn9 cuboctahedra, faces with four equivalent Zn(2)Sm2Zn10 cuboctahedra, faces with seven equivalent Zn(3)Sm2Zn10 cuboctahedra, and faces with ten equivalent Zn(4)Sm3Zn9 cuboctahedra. In the fourth Zn site, Zn(4) is bonded to one Sm(2), two equivalent Sm(1), one Zn(1), two equivalent Zn(2), two equivalent Zn(4), and four equivalent Zn(3) atoms to form distorted ZnSm3Zn9 cuboctahedra that share corners with five equivalent Zn(2)Sm2Zn10 cuboctahedra, corners with eight equivalent Zn(3)Sm2Zn10 cuboctahedra, corners with ten equivalent Zn(4)Sm3Zn9 cuboctahedra, edges with two equivalent Zn(3)Sm2Zn10 cuboctahedra, edges with three equivalent Zn(2)Sm2Zn10 cuboctahedra, edges with five equivalent Zn(4)Sm3Zn9 cuboctahedra, faces with two equivalent Zn(2)Sm2Zn10 cuboctahedra, faces with eight equivalent Zn(4)Sm3Zn9 cuboctahedra, and faces with ten equivalent Zn(3)Sm2Zn10 cuboctahedra. is represented by the CIF card [CIF]
data_Sm2Zn17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.045
_cell_length_b   9.045
_cell_length_c   8.733
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   618.704
_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  0.000  0.250  1.0
  Sm  Sm1  1  0.000  0.000  0.750  1.0
  Sm  Sm2  1  0.333  0.667  0.750  1.0
  Sm  Sm3  1  0.667  0.333  0.250  1.0
  Zn  Zn4  1  0.333  0.667  0.401  1.0
  Zn  Zn5  1  0.667  0.333  0.599  1.0
  Zn  Zn6  1  0.667  0.333  0.901  1.0
  Zn  Zn7  1  0.333  0.667  0.099  1.0
  Zn  Zn8  1  0.500  0.500  0.500  1.0
  Zn  Zn9  1  0.500  0.000  0.500  1.0
  Zn  Zn10  1  0.000  0.500  0.500  1.0
  Zn  Zn11  1  0.500  0.500  0.000  1.0
  Zn  Zn12  1  0.500  0.000  0.000  1.0
  Zn  Zn13  1  0.000  0.500  0.000  1.0
  Zn  Zn14  1  0.329  0.366  0.250  1.0
  Zn  Zn15  1  0.634  0.963  0.250  1.0
  Zn  Zn16  1  0.037  0.671  0.250  1.0
  Zn  Zn17  1  0.634  0.671  0.250  1.0
  Zn  Zn18  1  0.037  0.366  0.250  1.0
  Zn  Zn19  1  0.329  0.963  0.250  1.0
  Zn  Zn20  1  0.671  0.634  0.750  1.0
  Zn  Zn21  1  0.366  0.037  0.750  1.0
  Zn  Zn22  1  0.963  0.329  0.750  1.0
  Zn  Zn23  1  0.366  0.329  0.750  1.0
  Zn  Zn24  1  0.963  0.634  0.750  1.0
  Zn  Zn25  1  0.671  0.037  0.750  1.0
  Zn  Zn26  1  0.162  0.838  0.518  1.0
  Zn  Zn27  1  0.162  0.323  0.518  1.0
  Zn  Zn28  1  0.677  0.838  0.518  1.0
  Zn  Zn29  1  0.838  0.162  0.482  1.0
  Zn  Zn30  1  0.838  0.677  0.482  1.0
  Zn  Zn31  1  0.323  0.162  0.482  1.0
  Zn  Zn32  1  0.838  0.162  0.018  1.0
  Zn  Zn33  1  0.838  0.677  0.018  1.0
  Zn  Zn34  1  0.323  0.162  0.018  1.0
  Zn  Zn35  1  0.162  0.838  0.982  1.0
  Zn  Zn36  1  0.162  0.323  0.982  1.0
  Zn  Zn37  1  0.677  0.838  0.982  1.0
[/CIF]
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The compound described by Sm2Zn17 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 18-coordinate geometry to six equivalent Zn(3) and twelve equivalent Zn(4) atoms. In the second Sm site, Sm(2) is bonded in a 20-coordinate geometry to two equivalent Zn(1), six equivalent Zn(2), six equivalent Zn(3), and six equivalent Zn(4) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 14-coordinate geometry to one Sm(2), one Zn(1), three equivalent Zn(2), three equivalent Zn(4), and six equivalent Zn(3) atoms. In the second Zn site, Zn(2) is bonded to two equivalent Sm(2), two equivalent Zn(1), four equivalent Zn(3), and four equivalent Zn(4) atoms to form ZnSm2Zn10 cuboctahedra that share corners with four equivalent Zn(2)Sm2Zn10 cuboctahedra, corners with eight equivalent Zn(3)Sm2Zn10 cuboctahedra, corners with ten equivalent Zn(4)Sm3Zn9 cuboctahedra, edges with four equivalent Zn(3)Sm2Zn10 cuboctahedra, edges with six equivalent Zn(4)Sm3Zn9 cuboctahedra, faces with four equivalent Zn(4)Sm3Zn9 cuboctahedra, faces with six equivalent Zn(2)Sm2Zn10 cuboctahedra, and faces with eight equivalent Zn(3)Sm2Zn10 cuboctahedra. In the third Zn site, Zn(3) is bonded to one Sm(1), one Sm(2), two equivalent Zn(1), two equivalent Zn(2), two equivalent Zn(3), and four equivalent Zn(4) atoms to form distorted ZnSm2Zn10 cuboctahedra that share corners with four equivalent Zn(2)Sm2Zn10 cuboctahedra, corners with eight equivalent Zn(4)Sm3Zn9 cuboctahedra, corners with twelve equivalent Zn(3)Sm2Zn10 cuboctahedra,  an edgeedge with one Zn(3)Sm2Zn10 cuboctahedra, edges with two equivalent Zn(2)Sm2Zn10 cuboctahedra, edges with two equivalent Zn(4)Sm3Zn9 cuboctahedra, faces with four equivalent Zn(2)Sm2Zn10 cuboctahedra, faces with seven equivalent Zn(3)Sm2Zn10 cuboctahedra, and faces with ten equivalent Zn(4)Sm3Zn9 cuboctahedra. In the fourth Zn site, Zn(4) is bonded to one Sm(2), two equivalent Sm(1), one Zn(1), two equivalent Zn(2), two equivalent Zn(4), and four equivalent Zn(3) atoms to form distorted ZnSm3Zn9 cuboctahedra that share corners with five equivalent Zn(2)Sm2Zn10 cuboctahedra, corners with eight equivalent Zn(3)Sm2Zn10 cuboctahedra, corners with ten equivalent Zn(4)Sm3Zn9 cuboctahedra, edges with two equivalent Zn(3)Sm2Zn10 cuboctahedra, edges with three equivalent Zn(2)Sm2Zn10 cuboctahedra, edges with five equivalent Zn(4)Sm3Zn9 cuboctahedra, faces with two equivalent Zn(2)Sm2Zn10 cuboctahedra, faces with eight equivalent Zn(4)Sm3Zn9 cuboctahedra, and faces with ten equivalent Zn(3)Sm2Zn10 cuboctahedra. is represented by the CIF card [CIF]
data_Sm2Zn17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.045
_cell_length_b   9.045
_cell_length_c   8.733
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   618.704
_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  0.000  0.250  1.0
  Sm  Sm1  1  0.000  0.000  0.750  1.0
  Sm  Sm2  1  0.333  0.667  0.750  1.0
  Sm  Sm3  1  0.667  0.333  0.250  1.0
  Zn  Zn4  1  0.333  0.667  0.401  1.0
  Zn  Zn5  1  0.667  0.333  0.599  1.0
  Zn  Zn6  1  0.667  0.333  0.901  1.0
  Zn  Zn7  1  0.333  0.667  0.099  1.0
  Zn  Zn8  1  0.500  0.500  0.500  1.0
  Zn  Zn9  1  0.500  0.000  0.500  1.0
  Zn  Zn10  1  0.000  0.500  0.500  1.0
  Zn  Zn11  1  0.500  0.500  0.000  1.0
  Zn  Zn12  1  0.500  0.000  0.000  1.0
  Zn  Zn13  1  0.000  0.500  0.000  1.0
  Zn  Zn14  1  0.329  0.366  0.250  1.0
  Zn  Zn15  1  0.634  0.963  0.250  1.0
  Zn  Zn16  1  0.037  0.671  0.250  1.0
  Zn  Zn17  1  0.634  0.671  0.250  1.0
  Zn  Zn18  1  0.037  0.366  0.250  1.0
  Zn  Zn19  1  0.329  0.963  0.250  1.0
  Zn  Zn20  1  0.671  0.634  0.750  1.0
  Zn  Zn21  1  0.366  0.037  0.750  1.0
  Zn  Zn22  1  0.963  0.329  0.750  1.0
  Zn  Zn23  1  0.366  0.329  0.750  1.0
  Zn  Zn24  1  0.963  0.634  0.750  1.0
  Zn  Zn25  1  0.671  0.037  0.750  1.0
  Zn  Zn26  1  0.162  0.838  0.518  1.0
  Zn  Zn27  1  0.162  0.323  0.518  1.0
  Zn  Zn28  1  0.677  0.838  0.518  1.0
  Zn  Zn29  1  0.838  0.162  0.482  1.0
  Zn  Zn30  1  0.838  0.677  0.482  1.0
  Zn  Zn31  1  0.323  0.162  0.482  1.0
  Zn  Zn32  1  0.838  0.162  0.018  1.0
  Zn  Zn33  1  0.838  0.677  0.018  1.0
  Zn  Zn34  1  0.323  0.162  0.018  1.0
  Zn  Zn35  1  0.162  0.838  0.982  1.0
  Zn  Zn36  1  0.162  0.323  0.982  1.0
  Zn  Zn37  1  0.677  0.838  0.982  1.0
[/CIF]
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