The structure described by Er12(MnC3)5 crystallizes in the orthorhombic Amm2 space group. There are seven inequivalent Er sites. In the first Er site, Er(1) is bonded in a rectangular see-saw-like geometry to one C(8), one C(9), and two equivalent C(3) atoms. In the second Er site, Er(2) is bonded in a rectangular see-saw-like geometry to two equivalent C(4) and two equivalent C(7) atoms. In the third Er site, Er(3) is bonded to one C(1), one C(4), one C(6), and two equivalent C(7) atoms to form a mixture of distorted edge and corner-sharing ErC5 square pyramids. In the fourth Er site, Er(4) is bonded to one C(2), one C(3), one C(5), and two equivalent C(8) atoms to form a mixture of distorted edge and corner-sharing ErC5 square pyramids. In the fifth Er site, Er(5) is bonded to one C(1), one C(3), one C(5), and two equivalent C(9) atoms to form a mixture of distorted edge and corner-sharing ErC5 square pyramids. In the sixth Er site, Er(6) is bonded in a 8-coordinate geometry to one C(7), one C(8), two equivalent C(1), two equivalent C(5), and two equivalent C(9) atoms. In the seventh Er site, Er(7) is bonded in a 8-coordinate geometry to two equivalent C(2), two equivalent C(6), two equivalent C(7), and two equivalent C(8) atoms. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 3-coordinate geometry to one C(1), one C(3), and one C(4) atom. In the second Mn site, Mn(2) is bonded in a 3-coordinate geometry to one C(2) and two equivalent C(3) atoms. In the third Mn site, Mn(3) is bonded in a trigonal planar geometry to one C(7), one C(8), and one C(9) atom. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a 6-coordinate geometry to one Er(3), one Er(5), two equivalent Er(6), one Mn(1), and one C(5) atom. In the second C site, C(2) is bonded in a 6-coordinate geometry to two equivalent Er(4), two equivalent Er(7), one Mn(2), and one C(6) atom. In the third C site, C(3) is bonded to one Er(4), one Er(5), two equivalent Er(1), one Mn(1), and one Mn(2) atom to form CEr4Mn2 octahedra that share  a cornercorner with one C(4)Er4Mn2 octahedra, corners with three equivalent C(3)Er4Mn2 octahedra, edges with two equivalent C(8)Er5Mn octahedra, and edges with two equivalent C(9)Er5Mn octahedra. The corner-sharing octahedral tilt angles range from 1-31°. In the fourth C site, C(4) is bonded to two equivalent Er(2), two equivalent Er(3), and two equivalent Mn(1) atoms to form CEr4Mn2 octahedra that share corners with two equivalent C(3)Er4Mn2 octahedra, corners with two equivalent C(4)Er4Mn2 octahedra, and edges with four equivalent C(7)Er5Mn octahedra. The corner-sharing octahedral tilt angles range from 2-31°. In the fifth C site, C(5) is bonded in a 5-coordinate geometry to one Er(4), one Er(5), two equivalent Er(6), and one C(1) atom. In the sixth C site, C(6) is bonded in a 5-coordinate geometry to two equivalent Er(3), two equivalent Er(7), and one C(2) atom. In the seventh C site, C(7) is bonded to one Er(2), one Er(6), one Er(7), two equivalent Er(3), and one Mn(3) atom to form distorted CEr5Mn octahedra that share  a cornercorner with one C(9)Er5Mn octahedra, corners with two equivalent C(7)Er5Mn octahedra, corners with two equivalent C(8)Er5Mn octahedra,  an edgeedge with one C(7)Er5Mn octahedra,  an edgeedge with one C(8)Er5Mn octahedra,  an edgeedge with one C(9)Er5Mn octahedra, and edges with two equivalent C(4)Er4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 9-42°. In the eighth C site, C(8) is bonded to one Er(1), one Er(6), one Er(7), two equivalent Er(4), and one Mn(3) atom to form distorted CEr5Mn octahedra that share corners with two equivalent C(7)Er5Mn octahedra, corners with three equivalent C(8)Er5Mn octahedra,  an edgeedge with one C(7)Er5Mn octahedra, edges with two equivalent C(3)Er4Mn2 octahedra, and edges with two equivalent C(9)Er5Mn octahedra. The corner-sharing octahedral tilt angles range from 10-43°. In the ninth C site, C(9) is bonded to one Er(1), two equivalent Er(5), two equivalent Er(6), and one Mn(3) atom to form distorted CEr5Mn octahedra that share  a cornercorner with one C(7)Er5Mn octahedra, corners with four equivalent C(9)Er5Mn octahedra,  an edgeedge with one C(7)Er5Mn octahedra, edges with two equivalent C(3)Er4Mn2 octahedra, and edges with two equivalent C(8)Er5Mn octahedra. The corner-sharing octahedral tilt angles range from 9-42°. is represented by the CIF card [CIF]
data_Er12(MnC3)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.974
_cell_length_b   10.384
_cell_length_c   10.372
_cell_angle_alpha   120.038
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   463.798
_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
  Er  Er0  1  0.500  0.208  0.206  1.0
  Er  Er1  1  0.500  0.001  0.794  1.0
  Er  Er2  1  0.500  0.790  0.000  1.0
  Er  Er3  1  1.000  0.730  0.185  1.0
  Er  Er4  1  0.000  0.454  0.268  1.0
  Er  Er5  1  1.000  0.545  0.815  1.0
  Er  Er6  1  1.000  0.814  0.545  1.0
  Er  Er7  1  1.000  0.186  0.732  1.0
  Er  Er8  1  0.000  0.269  0.455  1.0
  Er  Er9  1  0.500  0.570  0.571  1.0
  Er  Er10  1  0.500  0.999  0.429  1.0
  Er  Er11  1  0.500  0.432  0.000  1.0
  Mn  Mn12  1  1.000  0.846  0.846  1.0
  Mn  Mn13  1  1.000  0.001  0.154  1.0
  Mn  Mn14  1  1.000  0.154  0.000  1.0
  Mn  Mn15  1  0.500  0.667  0.334  1.0
  Mn  Mn16  1  0.500  0.333  0.666  1.0
  C  C17  1  0.000  0.671  0.672  1.0
  C  C18  1  1.000  1.000  0.328  1.0
  C  C19  1  0.000  0.328  1.000  1.0
  C  C20  1  0.000  0.209  0.209  1.0
  C  C21  1  1.000  1.000  0.791  1.0
  C  C22  1  1.000  0.793  0.000  1.0
  C  C23  1  0.000  0.541  0.542  1.0
  C  C24  1  1.000  0.999  0.458  1.0
  C  C25  1  0.000  0.458  1.000  1.0
  C  C26  1  0.500  0.719  0.195  1.0
  C  C27  1  0.500  0.477  0.281  1.0
  C  C28  1  0.500  0.524  0.805  1.0
  C  C29  1  0.500  0.804  0.524  1.0
  C  C30  1  0.500  0.196  0.719  1.0
  C  C31  1  0.500  0.280  0.476  1.0
[/CIF]
.
The structure described by Er12(MnC3)5 crystallizes in the orthorhombic Amm2 space group. There are seven inequivalent Er sites. In the first Er site, Er(1) is bonded in a rectangular see-saw-like geometry to one C(8), one C(9), and two equivalent C(3) atoms. In the second Er site, Er(2) is bonded in a rectangular see-saw-like geometry to two equivalent C(4) and two equivalent C(7) atoms. In the third Er site, Er(3) is bonded to one C(1), one C(4), one C(6), and two equivalent C(7) atoms to form a mixture of distorted edge and corner-sharing ErC5 square pyramids. In the fourth Er site, Er(4) is bonded to one C(2), one C(3), one C(5), and two equivalent C(8) atoms to form a mixture of distorted edge and corner-sharing ErC5 square pyramids. In the fifth Er site, Er(5) is bonded to one C(1), one C(3), one C(5), and two equivalent C(9) atoms to form a mixture of distorted edge and corner-sharing ErC5 square pyramids. In the sixth Er site, Er(6) is bonded in a 8-coordinate geometry to one C(7), one C(8), two equivalent C(1), two equivalent C(5), and two equivalent C(9) atoms. In the seventh Er site, Er(7) is bonded in a 8-coordinate geometry to two equivalent C(2), two equivalent C(6), two equivalent C(7), and two equivalent C(8) atoms. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 3-coordinate geometry to one C(1), one C(3), and one C(4) atom. In the second Mn site, Mn(2) is bonded in a 3-coordinate geometry to one C(2) and two equivalent C(3) atoms. In the third Mn site, Mn(3) is bonded in a trigonal planar geometry to one C(7), one C(8), and one C(9) atom. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a 6-coordinate geometry to one Er(3), one Er(5), two equivalent Er(6), one Mn(1), and one C(5) atom. In the second C site, C(2) is bonded in a 6-coordinate geometry to two equivalent Er(4), two equivalent Er(7), one Mn(2), and one C(6) atom. In the third C site, C(3) is bonded to one Er(4), one Er(5), two equivalent Er(1), one Mn(1), and one Mn(2) atom to form CEr4Mn2 octahedra that share  a cornercorner with one C(4)Er4Mn2 octahedra, corners with three equivalent C(3)Er4Mn2 octahedra, edges with two equivalent C(8)Er5Mn octahedra, and edges with two equivalent C(9)Er5Mn octahedra. The corner-sharing octahedral tilt angles range from 1-31°. In the fourth C site, C(4) is bonded to two equivalent Er(2), two equivalent Er(3), and two equivalent Mn(1) atoms to form CEr4Mn2 octahedra that share corners with two equivalent C(3)Er4Mn2 octahedra, corners with two equivalent C(4)Er4Mn2 octahedra, and edges with four equivalent C(7)Er5Mn octahedra. The corner-sharing octahedral tilt angles range from 2-31°. In the fifth C site, C(5) is bonded in a 5-coordinate geometry to one Er(4), one Er(5), two equivalent Er(6), and one C(1) atom. In the sixth C site, C(6) is bonded in a 5-coordinate geometry to two equivalent Er(3), two equivalent Er(7), and one C(2) atom. In the seventh C site, C(7) is bonded to one Er(2), one Er(6), one Er(7), two equivalent Er(3), and one Mn(3) atom to form distorted CEr5Mn octahedra that share  a cornercorner with one C(9)Er5Mn octahedra, corners with two equivalent C(7)Er5Mn octahedra, corners with two equivalent C(8)Er5Mn octahedra,  an edgeedge with one C(7)Er5Mn octahedra,  an edgeedge with one C(8)Er5Mn octahedra,  an edgeedge with one C(9)Er5Mn octahedra, and edges with two equivalent C(4)Er4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 9-42°. In the eighth C site, C(8) is bonded to one Er(1), one Er(6), one Er(7), two equivalent Er(4), and one Mn(3) atom to form distorted CEr5Mn octahedra that share corners with two equivalent C(7)Er5Mn octahedra, corners with three equivalent C(8)Er5Mn octahedra,  an edgeedge with one C(7)Er5Mn octahedra, edges with two equivalent C(3)Er4Mn2 octahedra, and edges with two equivalent C(9)Er5Mn octahedra. The corner-sharing octahedral tilt angles range from 10-43°. In the ninth C site, C(9) is bonded to one Er(1), two equivalent Er(5), two equivalent Er(6), and one Mn(3) atom to form distorted CEr5Mn octahedra that share  a cornercorner with one C(7)Er5Mn octahedra, corners with four equivalent C(9)Er5Mn octahedra,  an edgeedge with one C(7)Er5Mn octahedra, edges with two equivalent C(3)Er4Mn2 octahedra, and edges with two equivalent C(8)Er5Mn octahedra. The corner-sharing octahedral tilt angles range from 9-42°. is represented by the CIF card [CIF]
data_Er12(MnC3)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.974
_cell_length_b   10.384
_cell_length_c   10.372
_cell_angle_alpha   120.038
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   463.798
_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
  Er  Er0  1  0.500  0.208  0.206  1.0
  Er  Er1  1  0.500  0.001  0.794  1.0
  Er  Er2  1  0.500  0.790  0.000  1.0
  Er  Er3  1  1.000  0.730  0.185  1.0
  Er  Er4  1  0.000  0.454  0.268  1.0
  Er  Er5  1  1.000  0.545  0.815  1.0
  Er  Er6  1  1.000  0.814  0.545  1.0
  Er  Er7  1  1.000  0.186  0.732  1.0
  Er  Er8  1  0.000  0.269  0.455  1.0
  Er  Er9  1  0.500  0.570  0.571  1.0
  Er  Er10  1  0.500  0.999  0.429  1.0
  Er  Er11  1  0.500  0.432  0.000  1.0
  Mn  Mn12  1  1.000  0.846  0.846  1.0
  Mn  Mn13  1  1.000  0.001  0.154  1.0
  Mn  Mn14  1  1.000  0.154  0.000  1.0
  Mn  Mn15  1  0.500  0.667  0.334  1.0
  Mn  Mn16  1  0.500  0.333  0.666  1.0
  C  C17  1  0.000  0.671  0.672  1.0
  C  C18  1  1.000  1.000  0.328  1.0
  C  C19  1  0.000  0.328  1.000  1.0
  C  C20  1  0.000  0.209  0.209  1.0
  C  C21  1  1.000  1.000  0.791  1.0
  C  C22  1  1.000  0.793  0.000  1.0
  C  C23  1  0.000  0.541  0.542  1.0
  C  C24  1  1.000  0.999  0.458  1.0
  C  C25  1  0.000  0.458  1.000  1.0
  C  C26  1  0.500  0.719  0.195  1.0
  C  C27  1  0.500  0.477  0.281  1.0
  C  C28  1  0.500  0.524  0.805  1.0
  C  C29  1  0.500  0.804  0.524  1.0
  C  C30  1  0.500  0.196  0.719  1.0
  C  C31  1  0.500  0.280  0.476  1.0
[/CIF]
.