The structure described by Er3SmMn8 is Hexagonal Laves-derived structured and crystallizes in the monoclinic Cm space group. There are three inequivalent Er sites. In the first Er site, Er(1) is bonded in a 16-coordinate geometry to one Er(2), three equivalent Sm(1), one Mn(4), two equivalent Mn(3), two equivalent Mn(6), three equivalent Mn(1), and four equivalent Mn(5) atoms. In the second Er site, Er(2) is bonded in a 16-coordinate geometry to one Er(1), three equivalent Er(3), one Mn(4), two equivalent Mn(3), two equivalent Mn(6), three equivalent Mn(2), and four equivalent Mn(5) atoms. In the third Er site, Er(3) is bonded in a 16-coordinate geometry to three equivalent Er(2), one Sm(1), one Mn(6), two equivalent Mn(4), two equivalent Mn(5), three equivalent Mn(2), and four equivalent Mn(3) atoms. Sm(1) is bonded in a 16-coordinate geometry to one Er(3), three equivalent Er(1), one Mn(6), two equivalent Mn(4), two equivalent Mn(5), three equivalent Mn(1), and four equivalent Mn(3) atoms. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to three equivalent Er(1), three equivalent Sm(1), one Mn(4), one Mn(6), two equivalent Mn(3), and two equivalent Mn(5) atoms to form MnSm3Er3Mn6 cuboctahedra that share corners with two equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, corners with two equivalent Mn(6)SmEr5Mn6 cuboctahedra, corners with four equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, corners with four equivalent Mn(5)SmEr5Mn6 cuboctahedra, edges with six equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, faces with two equivalent Mn(2)Er6Mn6 cuboctahedra, faces with three equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, faces with three equivalent Mn(6)SmEr5Mn6 cuboctahedra, faces with six equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, and faces with six equivalent Mn(5)SmEr5Mn6 cuboctahedra. In the second Mn site, Mn(2) is bonded to three equivalent Er(2), three equivalent Er(3), one Mn(4), one Mn(6), two equivalent Mn(3), and two equivalent Mn(5) atoms to form MnEr6Mn6 cuboctahedra that share corners with two equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, corners with two equivalent Mn(6)SmEr5Mn6 cuboctahedra, corners with four equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, corners with four equivalent Mn(5)SmEr5Mn6 cuboctahedra, edges with six equivalent Mn(2)Er6Mn6 cuboctahedra, faces with two equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, faces with three equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, faces with three equivalent Mn(6)SmEr5Mn6 cuboctahedra, faces with six equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, and faces with six equivalent Mn(5)SmEr5Mn6 cuboctahedra. In the third Mn site, Mn(3) is bonded to one Er(1), one Er(2), two equivalent Er(3), two equivalent Sm(1), one Mn(1), one Mn(2), two equivalent Mn(3), and two equivalent Mn(4) atoms to form MnSm2Er4Mn6 cuboctahedra that share corners with two equivalent Mn(2)Er6Mn6 cuboctahedra, corners with two equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, corners with four equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, corners with four equivalent Mn(6)SmEr5Mn6 cuboctahedra, corners with six equivalent Mn(5)SmEr5Mn6 cuboctahedra, edges with two equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, edges with four equivalent Mn(5)SmEr5Mn6 cuboctahedra, faces with two equivalent Mn(5)SmEr5Mn6 cuboctahedra, faces with two equivalent Mn(6)SmEr5Mn6 cuboctahedra, faces with three equivalent Mn(2)Er6Mn6 cuboctahedra, faces with three equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, faces with four equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, and faces with four equivalent Mn(4)Sm2Er4Mn6 cuboctahedra. In the fourth Mn site, Mn(4) is bonded to one Er(1), one Er(2), two equivalent Er(3), two equivalent Sm(1), one Mn(1), one Mn(2), and four equivalent Mn(3) atoms to form MnSm2Er4Mn6 cuboctahedra that share corners with two equivalent Mn(2)Er6Mn6 cuboctahedra, corners with two equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, corners with two equivalent Mn(6)SmEr5Mn6 cuboctahedra, corners with four equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, corners with eight equivalent Mn(5)SmEr5Mn6 cuboctahedra, edges with two equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, edges with four equivalent Mn(6)SmEr5Mn6 cuboctahedra, faces with three equivalent Mn(2)Er6Mn6 cuboctahedra, faces with three equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, faces with four equivalent Mn(5)SmEr5Mn6 cuboctahedra, and faces with eight equivalent Mn(3)Sm2Er4Mn6 cuboctahedra. In the fifth Mn site, Mn(5) is bonded to one Er(3), two equivalent Er(1), two equivalent Er(2), one Sm(1), one Mn(1), one Mn(2), two equivalent Mn(5), and two equivalent Mn(6) atoms to form MnSmEr5Mn6 cuboctahedra that share corners with two equivalent Mn(2)Er6Mn6 cuboctahedra, corners with two equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, corners with four equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, corners with four equivalent Mn(5)SmEr5Mn6 cuboctahedra, corners with six equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, edges with two equivalent Mn(5)SmEr5Mn6 cuboctahedra, edges with four equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, faces with two equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, faces with two equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, faces with three equivalent Mn(2)Er6Mn6 cuboctahedra, faces with three equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, faces with four equivalent Mn(5)SmEr5Mn6 cuboctahedra, and faces with four equivalent Mn(6)SmEr5Mn6 cuboctahedra. In the sixth Mn site, Mn(6) is bonded to one Er(3), two equivalent Er(1), two equivalent Er(2), one Sm(1), one Mn(1), one Mn(2), and four equivalent Mn(5) atoms to form MnSmEr5Mn6 cuboctahedra that share corners with two equivalent Mn(2)Er6Mn6 cuboctahedra, corners with two equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, corners with two equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, corners with four equivalent Mn(6)SmEr5Mn6 cuboctahedra, corners with eight equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, edges with two equivalent Mn(6)SmEr5Mn6 cuboctahedra, edges with four equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, faces with three equivalent Mn(2)Er6Mn6 cuboctahedra, faces with three equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, faces with four equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, and faces with eight equivalent Mn(5)SmEr5Mn6 cuboctahedra. is represented by the CIF card [CIF]
data_SmEr3Mn8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.032
_cell_length_b   5.032
_cell_length_c   8.638
_cell_angle_alpha   90.337
_cell_angle_beta   89.663
_cell_angle_gamma   119.675
_symmetry_Int_Tables_number   1
_cell_volume   190.057
_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  0.667  0.333  0.565  1.0
  Er  Er1  1  0.333  0.667  0.432  1.0
  Er  Er2  1  0.333  0.667  0.066  1.0
  Er  Er3  1  0.667  0.333  0.936  1.0
  Mn  Mn4  1  1.000  0.000  0.498  1.0
  Mn  Mn5  1  1.000  0.000  0.001  1.0
  Mn  Mn6  1  0.169  0.338  0.754  1.0
  Mn  Mn7  1  0.169  0.831  0.754  1.0
  Mn  Mn8  1  0.662  0.831  0.754  1.0
  Mn  Mn9  1  0.832  0.663  0.247  1.0
  Mn  Mn10  1  0.831  0.169  0.246  1.0
  Mn  Mn11  1  0.337  0.168  0.247  1.0
[/CIF]
.
The structure described by Er3SmMn8 is Hexagonal Laves-derived structured and crystallizes in the monoclinic Cm space group. There are three inequivalent Er sites. In the first Er site, Er(1) is bonded in a 16-coordinate geometry to one Er(2), three equivalent Sm(1), one Mn(4), two equivalent Mn(3), two equivalent Mn(6), three equivalent Mn(1), and four equivalent Mn(5) atoms. In the second Er site, Er(2) is bonded in a 16-coordinate geometry to one Er(1), three equivalent Er(3), one Mn(4), two equivalent Mn(3), two equivalent Mn(6), three equivalent Mn(2), and four equivalent Mn(5) atoms. In the third Er site, Er(3) is bonded in a 16-coordinate geometry to three equivalent Er(2), one Sm(1), one Mn(6), two equivalent Mn(4), two equivalent Mn(5), three equivalent Mn(2), and four equivalent Mn(3) atoms. Sm(1) is bonded in a 16-coordinate geometry to one Er(3), three equivalent Er(1), one Mn(6), two equivalent Mn(4), two equivalent Mn(5), three equivalent Mn(1), and four equivalent Mn(3) atoms. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to three equivalent Er(1), three equivalent Sm(1), one Mn(4), one Mn(6), two equivalent Mn(3), and two equivalent Mn(5) atoms to form MnSm3Er3Mn6 cuboctahedra that share corners with two equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, corners with two equivalent Mn(6)SmEr5Mn6 cuboctahedra, corners with four equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, corners with four equivalent Mn(5)SmEr5Mn6 cuboctahedra, edges with six equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, faces with two equivalent Mn(2)Er6Mn6 cuboctahedra, faces with three equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, faces with three equivalent Mn(6)SmEr5Mn6 cuboctahedra, faces with six equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, and faces with six equivalent Mn(5)SmEr5Mn6 cuboctahedra. In the second Mn site, Mn(2) is bonded to three equivalent Er(2), three equivalent Er(3), one Mn(4), one Mn(6), two equivalent Mn(3), and two equivalent Mn(5) atoms to form MnEr6Mn6 cuboctahedra that share corners with two equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, corners with two equivalent Mn(6)SmEr5Mn6 cuboctahedra, corners with four equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, corners with four equivalent Mn(5)SmEr5Mn6 cuboctahedra, edges with six equivalent Mn(2)Er6Mn6 cuboctahedra, faces with two equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, faces with three equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, faces with three equivalent Mn(6)SmEr5Mn6 cuboctahedra, faces with six equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, and faces with six equivalent Mn(5)SmEr5Mn6 cuboctahedra. In the third Mn site, Mn(3) is bonded to one Er(1), one Er(2), two equivalent Er(3), two equivalent Sm(1), one Mn(1), one Mn(2), two equivalent Mn(3), and two equivalent Mn(4) atoms to form MnSm2Er4Mn6 cuboctahedra that share corners with two equivalent Mn(2)Er6Mn6 cuboctahedra, corners with two equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, corners with four equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, corners with four equivalent Mn(6)SmEr5Mn6 cuboctahedra, corners with six equivalent Mn(5)SmEr5Mn6 cuboctahedra, edges with two equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, edges with four equivalent Mn(5)SmEr5Mn6 cuboctahedra, faces with two equivalent Mn(5)SmEr5Mn6 cuboctahedra, faces with two equivalent Mn(6)SmEr5Mn6 cuboctahedra, faces with three equivalent Mn(2)Er6Mn6 cuboctahedra, faces with three equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, faces with four equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, and faces with four equivalent Mn(4)Sm2Er4Mn6 cuboctahedra. In the fourth Mn site, Mn(4) is bonded to one Er(1), one Er(2), two equivalent Er(3), two equivalent Sm(1), one Mn(1), one Mn(2), and four equivalent Mn(3) atoms to form MnSm2Er4Mn6 cuboctahedra that share corners with two equivalent Mn(2)Er6Mn6 cuboctahedra, corners with two equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, corners with two equivalent Mn(6)SmEr5Mn6 cuboctahedra, corners with four equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, corners with eight equivalent Mn(5)SmEr5Mn6 cuboctahedra, edges with two equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, edges with four equivalent Mn(6)SmEr5Mn6 cuboctahedra, faces with three equivalent Mn(2)Er6Mn6 cuboctahedra, faces with three equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, faces with four equivalent Mn(5)SmEr5Mn6 cuboctahedra, and faces with eight equivalent Mn(3)Sm2Er4Mn6 cuboctahedra. In the fifth Mn site, Mn(5) is bonded to one Er(3), two equivalent Er(1), two equivalent Er(2), one Sm(1), one Mn(1), one Mn(2), two equivalent Mn(5), and two equivalent Mn(6) atoms to form MnSmEr5Mn6 cuboctahedra that share corners with two equivalent Mn(2)Er6Mn6 cuboctahedra, corners with two equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, corners with four equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, corners with four equivalent Mn(5)SmEr5Mn6 cuboctahedra, corners with six equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, edges with two equivalent Mn(5)SmEr5Mn6 cuboctahedra, edges with four equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, faces with two equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, faces with two equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, faces with three equivalent Mn(2)Er6Mn6 cuboctahedra, faces with three equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, faces with four equivalent Mn(5)SmEr5Mn6 cuboctahedra, and faces with four equivalent Mn(6)SmEr5Mn6 cuboctahedra. In the sixth Mn site, Mn(6) is bonded to one Er(3), two equivalent Er(1), two equivalent Er(2), one Sm(1), one Mn(1), one Mn(2), and four equivalent Mn(5) atoms to form MnSmEr5Mn6 cuboctahedra that share corners with two equivalent Mn(2)Er6Mn6 cuboctahedra, corners with two equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, corners with two equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, corners with four equivalent Mn(6)SmEr5Mn6 cuboctahedra, corners with eight equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, edges with two equivalent Mn(6)SmEr5Mn6 cuboctahedra, edges with four equivalent Mn(4)Sm2Er4Mn6 cuboctahedra, faces with three equivalent Mn(2)Er6Mn6 cuboctahedra, faces with three equivalent Mn(1)Sm3Er3Mn6 cuboctahedra, faces with four equivalent Mn(3)Sm2Er4Mn6 cuboctahedra, and faces with eight equivalent Mn(5)SmEr5Mn6 cuboctahedra. is represented by the CIF card [CIF]
data_SmEr3Mn8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.032
_cell_length_b   5.032
_cell_length_c   8.638
_cell_angle_alpha   90.337
_cell_angle_beta   89.663
_cell_angle_gamma   119.675
_symmetry_Int_Tables_number   1
_cell_volume   190.057
_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  0.667  0.333  0.565  1.0
  Er  Er1  1  0.333  0.667  0.432  1.0
  Er  Er2  1  0.333  0.667  0.066  1.0
  Er  Er3  1  0.667  0.333  0.936  1.0
  Mn  Mn4  1  1.000  0.000  0.498  1.0
  Mn  Mn5  1  1.000  0.000  0.001  1.0
  Mn  Mn6  1  0.169  0.338  0.754  1.0
  Mn  Mn7  1  0.169  0.831  0.754  1.0
  Mn  Mn8  1  0.662  0.831  0.754  1.0
  Mn  Mn9  1  0.832  0.663  0.247  1.0
  Mn  Mn10  1  0.831  0.169  0.246  1.0
  Mn  Mn11  1  0.337  0.168  0.247  1.0
[/CIF]
.