The crystal structure described by Er10Ru10C19 crystallizes in the monoclinic Cm space group. There are ten inequivalent Er sites. In the first Er site, Er(1) is bonded in a 8-coordinate geometry to one C(1), two equivalent C(10), two equivalent C(7), two equivalent C(8), and two equivalent C(9) atoms. In the second Er site, Er(2) is bonded in a 10-coordinate geometry to two equivalent C(10), two equivalent C(2), two equivalent C(7), two equivalent C(8), and two equivalent C(9) atoms. In the third Er site, Er(3) is bonded in a 6-coordinate geometry to two equivalent C(4), two equivalent C(5), and two equivalent C(7) atoms. In the fourth Er site, Er(4) is bonded in a 6-coordinate geometry to two equivalent C(3), two equivalent C(6), and two equivalent C(8) atoms. In the fifth Er site, Er(5) is bonded in a 6-coordinate geometry to two equivalent C(3), two equivalent C(6), and two equivalent C(8) atoms. In the sixth Er site, Er(6) is bonded in a 6-coordinate geometry to two equivalent C(4), two equivalent C(5), and two equivalent C(7) atoms. In the seventh Er site, Er(7) is bonded in a 13-coordinate geometry to two equivalent Ru(1), two equivalent Ru(2), two equivalent Ru(4), one C(1), two equivalent C(3), two equivalent C(5), and two equivalent C(9) atoms. In the eighth Er site, Er(8) is bonded in a 13-coordinate geometry to two equivalent Ru(1), two equivalent Ru(3), two equivalent Ru(5), one C(1), two equivalent C(10), two equivalent C(4), and two equivalent C(6) atoms. In the ninth Er site, Er(9) is bonded in a 8-coordinate geometry to two equivalent C(2), two equivalent C(3), two equivalent C(5), and two equivalent C(9) atoms. In the tenth Er site, Er(10) is bonded in a 8-coordinate geometry to two equivalent C(10), two equivalent C(2), two equivalent C(4), and two equivalent C(6) atoms. There are five inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 4-coordinate geometry to one Er(7), one Er(8), one C(1), one C(10), one C(2), and one C(9) atom. In the second Ru site, Ru(2) is bonded in a 5-coordinate geometry to one Er(7), one C(3), one C(4), one C(6), one C(7), and one C(9) atom. In the third Ru site, Ru(3) is bonded in a 5-coordinate geometry to one Er(8), one C(10), one C(3), one C(4), one C(5), and one C(8) atom. In the fourth Ru site, Ru(4) is bonded in a 4-coordinate geometry to one Er(7), one C(1), one C(2), one C(5), and one C(7) atom. In the fifth Ru site, Ru(5) is bonded in a 4-coordinate geometry to one Er(8), one C(1), one C(2), one C(6), and one C(8) atom. There are ten inequivalent C sites. In the first C site, C(1) is bonded in a 9-coordinate geometry to one Er(1), one Er(7), one Er(8), two equivalent Ru(1), two equivalent Ru(4), and two equivalent Ru(5) atoms. In the second C site, C(2) is bonded in a 7-coordinate geometry to one Er(10), one Er(2), one Er(9), one Ru(1), one Ru(4), one Ru(5), and one C(2) atom. In the third C site, C(3) is bonded in a 7-coordinate geometry to one Er(4), one Er(5), one Er(7), one Er(9), one Ru(2), one Ru(3), and one C(5) atom. In the fourth C site, C(4) is bonded in a 7-coordinate geometry to one Er(10), one Er(3), one Er(6), one Er(8), one Ru(2), one Ru(3), and one C(6) atom. In the fifth C site, C(5) is bonded to one Er(3), one Er(6), one Er(7), one Er(9), one Ru(3), one Ru(4), and one C(3) atom to form a mixture of distorted corner, edge, and face-sharing CEr4Ru2C pentagonal bipyramids. In the sixth C site, C(6) is bonded to one Er(10), one Er(4), one Er(5), one Er(8), one Ru(2), one Ru(5), and one C(4) atom to form a mixture of distorted corner, edge, and face-sharing CEr4Ru2C pentagonal bipyramids. In the seventh C site, C(7) is bonded to one Er(1), one Er(2), one Er(3), one Er(6), one Ru(2), one Ru(4), and one C(9) atom to form a mixture of distorted corner, edge, and face-sharing CEr4Ru2C pentagonal bipyramids. In the eighth C site, C(8) is bonded to one Er(1), one Er(2), one Er(4), one Er(5), one Ru(3), one Ru(5), and one C(10) atom to form a mixture of distorted corner, edge, and face-sharing CEr4Ru2C pentagonal bipyramids. In the ninth C site, C(9) is bonded in a 7-coordinate geometry to one Er(1), one Er(2), one Er(7), one Er(9), one Ru(1), one Ru(2), and one C(7) atom. In the tenth C site, C(10) is bonded in a 7-coordinate geometry to one Er(1), one Er(10), one Er(2), one Er(8), one Ru(1), one Ru(3), and one C(8) atom. is represented by the CIF card [CIF]
data_Er10Ru10C19
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.131
_cell_length_b   8.131
_cell_length_c   9.990
_cell_angle_alpha   70.877
_cell_angle_beta   70.877
_cell_angle_gamma   52.458
_symmetry_Int_Tables_number   1
_cell_volume   487.558
_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  1.000  1.000  0.011  1.0
  Er  Er1  1  0.478  0.478  0.011  1.0
  Er  Er2  1  0.323  0.323  0.387  1.0
  Er  Er3  1  0.511  0.511  0.636  1.0
  Er  Er4  1  0.016  0.016  0.619  1.0
  Er  Er5  1  0.822  0.822  0.400  1.0
  Er  Er6  1  0.626  0.626  0.261  1.0
  Er  Er7  1  0.751  0.751  0.761  1.0
  Er  Er8  1  0.143  0.143  0.235  1.0
  Er  Er9  1  0.255  0.255  0.786  1.0
  Ru  Ru10  1  0.461  0.894  0.010  1.0
  Ru  Ru11  1  0.220  0.726  0.416  1.0
  Ru  Ru12  1  0.726  0.220  0.416  1.0
  Ru  Ru13  1  0.418  0.935  0.604  1.0
  Ru  Ru14  1  0.022  0.598  0.157  1.0
  Ru  Ru15  1  0.598  0.022  0.157  1.0
  Ru  Ru16  1  0.671  0.096  0.864  1.0
  Ru  Ru17  1  0.096  0.671  0.864  1.0
  Ru  Ru18  1  0.935  0.418  0.604  1.0
  Ru  Ru19  1  0.894  0.461  0.010  1.0
  C  C20  1  0.788  0.788  0.011  1.0
  C  C21  1  0.393  0.188  0.011  1.0
  C  C22  1  0.188  0.393  0.011  1.0
  C  C23  1  0.355  0.861  0.444  1.0
  C  C24  1  0.861  0.355  0.444  1.0
  C  C25  1  0.085  0.564  0.577  1.0
  C  C26  1  0.564  0.085  0.577  1.0
  C  C27  1  0.459  0.955  0.369  1.0
  C  C28  1  0.955  0.459  0.369  1.0
  C  C29  1  0.636  0.135  0.652  1.0
  C  C30  1  0.182  0.688  0.217  1.0
  C  C31  1  0.286  0.791  0.804  1.0
  C  C32  1  0.791  0.286  0.804  1.0
  C  C33  1  0.285  0.786  0.175  1.0
  C  C34  1  0.688  0.182  0.217  1.0
  C  C35  1  0.786  0.285  0.175  1.0
  C  C36  1  0.368  0.868  0.846  1.0
  C  C37  1  0.868  0.368  0.846  1.0
  C  C38  1  0.135  0.636  0.652  1.0
[/CIF]
.
The crystal structure described by Er10Ru10C19 crystallizes in the monoclinic Cm space group. There are ten inequivalent Er sites. In the first Er site, Er(1) is bonded in a 8-coordinate geometry to one C(1), two equivalent C(10), two equivalent C(7), two equivalent C(8), and two equivalent C(9) atoms. In the second Er site, Er(2) is bonded in a 10-coordinate geometry to two equivalent C(10), two equivalent C(2), two equivalent C(7), two equivalent C(8), and two equivalent C(9) atoms. In the third Er site, Er(3) is bonded in a 6-coordinate geometry to two equivalent C(4), two equivalent C(5), and two equivalent C(7) atoms. In the fourth Er site, Er(4) is bonded in a 6-coordinate geometry to two equivalent C(3), two equivalent C(6), and two equivalent C(8) atoms. In the fifth Er site, Er(5) is bonded in a 6-coordinate geometry to two equivalent C(3), two equivalent C(6), and two equivalent C(8) atoms. In the sixth Er site, Er(6) is bonded in a 6-coordinate geometry to two equivalent C(4), two equivalent C(5), and two equivalent C(7) atoms. In the seventh Er site, Er(7) is bonded in a 13-coordinate geometry to two equivalent Ru(1), two equivalent Ru(2), two equivalent Ru(4), one C(1), two equivalent C(3), two equivalent C(5), and two equivalent C(9) atoms. In the eighth Er site, Er(8) is bonded in a 13-coordinate geometry to two equivalent Ru(1), two equivalent Ru(3), two equivalent Ru(5), one C(1), two equivalent C(10), two equivalent C(4), and two equivalent C(6) atoms. In the ninth Er site, Er(9) is bonded in a 8-coordinate geometry to two equivalent C(2), two equivalent C(3), two equivalent C(5), and two equivalent C(9) atoms. In the tenth Er site, Er(10) is bonded in a 8-coordinate geometry to two equivalent C(10), two equivalent C(2), two equivalent C(4), and two equivalent C(6) atoms. There are five inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 4-coordinate geometry to one Er(7), one Er(8), one C(1), one C(10), one C(2), and one C(9) atom. In the second Ru site, Ru(2) is bonded in a 5-coordinate geometry to one Er(7), one C(3), one C(4), one C(6), one C(7), and one C(9) atom. In the third Ru site, Ru(3) is bonded in a 5-coordinate geometry to one Er(8), one C(10), one C(3), one C(4), one C(5), and one C(8) atom. In the fourth Ru site, Ru(4) is bonded in a 4-coordinate geometry to one Er(7), one C(1), one C(2), one C(5), and one C(7) atom. In the fifth Ru site, Ru(5) is bonded in a 4-coordinate geometry to one Er(8), one C(1), one C(2), one C(6), and one C(8) atom. There are ten inequivalent C sites. In the first C site, C(1) is bonded in a 9-coordinate geometry to one Er(1), one Er(7), one Er(8), two equivalent Ru(1), two equivalent Ru(4), and two equivalent Ru(5) atoms. In the second C site, C(2) is bonded in a 7-coordinate geometry to one Er(10), one Er(2), one Er(9), one Ru(1), one Ru(4), one Ru(5), and one C(2) atom. In the third C site, C(3) is bonded in a 7-coordinate geometry to one Er(4), one Er(5), one Er(7), one Er(9), one Ru(2), one Ru(3), and one C(5) atom. In the fourth C site, C(4) is bonded in a 7-coordinate geometry to one Er(10), one Er(3), one Er(6), one Er(8), one Ru(2), one Ru(3), and one C(6) atom. In the fifth C site, C(5) is bonded to one Er(3), one Er(6), one Er(7), one Er(9), one Ru(3), one Ru(4), and one C(3) atom to form a mixture of distorted corner, edge, and face-sharing CEr4Ru2C pentagonal bipyramids. In the sixth C site, C(6) is bonded to one Er(10), one Er(4), one Er(5), one Er(8), one Ru(2), one Ru(5), and one C(4) atom to form a mixture of distorted corner, edge, and face-sharing CEr4Ru2C pentagonal bipyramids. In the seventh C site, C(7) is bonded to one Er(1), one Er(2), one Er(3), one Er(6), one Ru(2), one Ru(4), and one C(9) atom to form a mixture of distorted corner, edge, and face-sharing CEr4Ru2C pentagonal bipyramids. In the eighth C site, C(8) is bonded to one Er(1), one Er(2), one Er(4), one Er(5), one Ru(3), one Ru(5), and one C(10) atom to form a mixture of distorted corner, edge, and face-sharing CEr4Ru2C pentagonal bipyramids. In the ninth C site, C(9) is bonded in a 7-coordinate geometry to one Er(1), one Er(2), one Er(7), one Er(9), one Ru(1), one Ru(2), and one C(7) atom. In the tenth C site, C(10) is bonded in a 7-coordinate geometry to one Er(1), one Er(10), one Er(2), one Er(8), one Ru(1), one Ru(3), and one C(8) atom. is represented by the CIF card [CIF]
data_Er10Ru10C19
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.131
_cell_length_b   8.131
_cell_length_c   9.990
_cell_angle_alpha   70.877
_cell_angle_beta   70.877
_cell_angle_gamma   52.458
_symmetry_Int_Tables_number   1
_cell_volume   487.558
_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  1.000  1.000  0.011  1.0
  Er  Er1  1  0.478  0.478  0.011  1.0
  Er  Er2  1  0.323  0.323  0.387  1.0
  Er  Er3  1  0.511  0.511  0.636  1.0
  Er  Er4  1  0.016  0.016  0.619  1.0
  Er  Er5  1  0.822  0.822  0.400  1.0
  Er  Er6  1  0.626  0.626  0.261  1.0
  Er  Er7  1  0.751  0.751  0.761  1.0
  Er  Er8  1  0.143  0.143  0.235  1.0
  Er  Er9  1  0.255  0.255  0.786  1.0
  Ru  Ru10  1  0.461  0.894  0.010  1.0
  Ru  Ru11  1  0.220  0.726  0.416  1.0
  Ru  Ru12  1  0.726  0.220  0.416  1.0
  Ru  Ru13  1  0.418  0.935  0.604  1.0
  Ru  Ru14  1  0.022  0.598  0.157  1.0
  Ru  Ru15  1  0.598  0.022  0.157  1.0
  Ru  Ru16  1  0.671  0.096  0.864  1.0
  Ru  Ru17  1  0.096  0.671  0.864  1.0
  Ru  Ru18  1  0.935  0.418  0.604  1.0
  Ru  Ru19  1  0.894  0.461  0.010  1.0
  C  C20  1  0.788  0.788  0.011  1.0
  C  C21  1  0.393  0.188  0.011  1.0
  C  C22  1  0.188  0.393  0.011  1.0
  C  C23  1  0.355  0.861  0.444  1.0
  C  C24  1  0.861  0.355  0.444  1.0
  C  C25  1  0.085  0.564  0.577  1.0
  C  C26  1  0.564  0.085  0.577  1.0
  C  C27  1  0.459  0.955  0.369  1.0
  C  C28  1  0.955  0.459  0.369  1.0
  C  C29  1  0.636  0.135  0.652  1.0
  C  C30  1  0.182  0.688  0.217  1.0
  C  C31  1  0.286  0.791  0.804  1.0
  C  C32  1  0.791  0.286  0.804  1.0
  C  C33  1  0.285  0.786  0.175  1.0
  C  C34  1  0.688  0.182  0.217  1.0
  C  C35  1  0.786  0.285  0.175  1.0
  C  C36  1  0.368  0.868  0.846  1.0
  C  C37  1  0.868  0.368  0.846  1.0
  C  C38  1  0.135  0.636  0.652  1.0
[/CIF]
.