The compound described by Sc2CrC3 crystallizes in the orthorhombic Pbam space group. There are three inequivalent Sc sites. In the first Sc site, Sc(1) is bonded to one C(1), two equivalent C(3), and four equivalent C(2) atoms to form distorted ScC7 pentagonal bipyramids that share corners with three equivalent Sc(3)C6 octahedra, corners with two equivalent C(2)Sc4Cr2C pentagonal bipyramids, corners with four equivalent Sc(1)C7 pentagonal bipyramids, corners with four equivalent C(3)Sc5CrC pentagonal bipyramids,  an edgeedge with one Sc(3)C6 octahedra, edges with two equivalent Sc(2)C6 octahedra, edges with two equivalent Sc(1)C7 pentagonal bipyramids, and faces with two equivalent Sc(1)C7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 2-21°. In the second Sc site, Sc(2) is bonded to two equivalent C(3) and four equivalent C(1) atoms to form ScC6 octahedra that share corners with two equivalent C(2)Sc4Cr2C pentagonal bipyramids, edges with two equivalent Sc(2)C6 octahedra, edges with four equivalent Sc(3)C6 octahedra, and edges with four equivalent Sc(1)C7 pentagonal bipyramids. In the third Sc site, Sc(3) is bonded to two equivalent C(1) and four equivalent C(3) atoms to form ScC6 octahedra that share corners with four equivalent C(2)Sc4Cr2C pentagonal bipyramids, corners with six equivalent Sc(1)C7 pentagonal bipyramids, edges with two equivalent Sc(3)C6 octahedra, edges with four equivalent Sc(2)C6 octahedra, and edges with two equivalent Sc(1)C7 pentagonal bipyramids. Cr(1) is bonded in a 5-coordinate geometry to one C(3), two equivalent C(1), and two equivalent C(2) atoms. There are three inequivalent C sites. In the first C site, C(1) is bonded to one Sc(1), one Sc(3), two equivalent Sc(2), and two equivalent Cr(1) atoms to form CSc4Cr2 octahedra that share corners with three equivalent C(1)Sc4Cr2 octahedra, corners with four equivalent C(2)Sc4Cr2C pentagonal bipyramids, edges with three equivalent C(1)Sc4Cr2 octahedra, edges with two equivalent C(2)Sc4Cr2C pentagonal bipyramids, and edges with six equivalent C(3)Sc5CrC pentagonal bipyramids. The corner-sharing octahedra are not tilted. In the second C site, C(2) is bonded to four equivalent Sc(1), two equivalent Cr(1), and one C(3) atom to form distorted CSc4Cr2C pentagonal bipyramids that share  a cornercorner with one Sc(2)C6 octahedra, corners with two equivalent Sc(3)C6 octahedra, corners with four equivalent C(1)Sc4Cr2 octahedra, corners with two equivalent Sc(1)C7 pentagonal bipyramids, corners with four equivalent C(2)Sc4Cr2C pentagonal bipyramids, corners with five equivalent C(3)Sc5CrC pentagonal bipyramids, edges with two equivalent C(1)Sc4Cr2 octahedra,  an edgeedge with one C(3)Sc5CrC pentagonal bipyramid, edges with two equivalent C(2)Sc4Cr2C pentagonal bipyramids,  a faceface with one C(3)Sc5CrC pentagonal bipyramid, and faces with two equivalent C(2)Sc4Cr2C pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 44-59°. In the third C site, C(3) is bonded to one Sc(2), two equivalent Sc(1), two equivalent Sc(3), one Cr(1), and one C(2) atom to form distorted CSc5CrC pentagonal bipyramids that share corners with three equivalent C(3)Sc5CrC pentagonal bipyramids, corners with four equivalent Sc(1)C7 pentagonal bipyramids, corners with five equivalent C(2)Sc4Cr2C pentagonal bipyramids, edges with six equivalent C(1)Sc4Cr2 octahedra,  an edgeedge with one C(2)Sc4Cr2C pentagonal bipyramid, edges with three equivalent C(3)Sc5CrC pentagonal bipyramids, and  a faceface with one C(2)Sc4Cr2C pentagonal bipyramid. is represented by the CIF file [CIF]
data_Sc2CrC3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.292
_cell_length_b   5.782
_cell_length_c   14.106
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   268.541
_cell_formula_units_Z   4
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
  Sc  Sc0  1  0.000  0.377  0.813  1.0
  Sc  Sc1  1  0.000  0.623  0.187  1.0
  Sc  Sc2  1  0.000  0.877  0.687  1.0
  Sc  Sc3  1  0.000  0.123  0.313  1.0
  Sc  Sc4  1  0.500  0.500  0.000  1.0
  Sc  Sc5  1  0.000  0.000  0.000  1.0
  Sc  Sc6  1  0.500  0.000  0.500  1.0
  Sc  Sc7  1  0.000  0.500  0.500  1.0
  Cr  Cr8  1  0.500  0.799  0.846  1.0
  Cr  Cr9  1  0.500  0.201  0.154  1.0
  Cr  Cr10  1  0.500  0.299  0.654  1.0
  Cr  Cr11  1  0.500  0.701  0.346  1.0
  C  C12  1  0.000  0.317  0.092  1.0
  C  C13  1  0.000  0.183  0.592  1.0
  C  C14  1  0.000  0.683  0.908  1.0
  C  C15  1  0.500  0.606  0.722  1.0
  C  C16  1  0.000  0.817  0.408  1.0
  C  C17  1  0.500  0.106  0.778  1.0
  C  C18  1  0.500  0.361  0.383  1.0
  C  C19  1  0.500  0.139  0.883  1.0
  C  C20  1  0.500  0.861  0.117  1.0
  C  C21  1  0.500  0.894  0.222  1.0
  C  C22  1  0.500  0.394  0.278  1.0
  C  C23  1  0.500  0.639  0.617  1.0
[/CIF]
.
The compound described by Sc2CrC3 crystallizes in the orthorhombic Pbam space group. There are three inequivalent Sc sites. In the first Sc site, Sc(1) is bonded to one C(1), two equivalent C(3), and four equivalent C(2) atoms to form distorted ScC7 pentagonal bipyramids that share corners with three equivalent Sc(3)C6 octahedra, corners with two equivalent C(2)Sc4Cr2C pentagonal bipyramids, corners with four equivalent Sc(1)C7 pentagonal bipyramids, corners with four equivalent C(3)Sc5CrC pentagonal bipyramids,  an edgeedge with one Sc(3)C6 octahedra, edges with two equivalent Sc(2)C6 octahedra, edges with two equivalent Sc(1)C7 pentagonal bipyramids, and faces with two equivalent Sc(1)C7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 2-21°. In the second Sc site, Sc(2) is bonded to two equivalent C(3) and four equivalent C(1) atoms to form ScC6 octahedra that share corners with two equivalent C(2)Sc4Cr2C pentagonal bipyramids, edges with two equivalent Sc(2)C6 octahedra, edges with four equivalent Sc(3)C6 octahedra, and edges with four equivalent Sc(1)C7 pentagonal bipyramids. In the third Sc site, Sc(3) is bonded to two equivalent C(1) and four equivalent C(3) atoms to form ScC6 octahedra that share corners with four equivalent C(2)Sc4Cr2C pentagonal bipyramids, corners with six equivalent Sc(1)C7 pentagonal bipyramids, edges with two equivalent Sc(3)C6 octahedra, edges with four equivalent Sc(2)C6 octahedra, and edges with two equivalent Sc(1)C7 pentagonal bipyramids. Cr(1) is bonded in a 5-coordinate geometry to one C(3), two equivalent C(1), and two equivalent C(2) atoms. There are three inequivalent C sites. In the first C site, C(1) is bonded to one Sc(1), one Sc(3), two equivalent Sc(2), and two equivalent Cr(1) atoms to form CSc4Cr2 octahedra that share corners with three equivalent C(1)Sc4Cr2 octahedra, corners with four equivalent C(2)Sc4Cr2C pentagonal bipyramids, edges with three equivalent C(1)Sc4Cr2 octahedra, edges with two equivalent C(2)Sc4Cr2C pentagonal bipyramids, and edges with six equivalent C(3)Sc5CrC pentagonal bipyramids. The corner-sharing octahedra are not tilted. In the second C site, C(2) is bonded to four equivalent Sc(1), two equivalent Cr(1), and one C(3) atom to form distorted CSc4Cr2C pentagonal bipyramids that share  a cornercorner with one Sc(2)C6 octahedra, corners with two equivalent Sc(3)C6 octahedra, corners with four equivalent C(1)Sc4Cr2 octahedra, corners with two equivalent Sc(1)C7 pentagonal bipyramids, corners with four equivalent C(2)Sc4Cr2C pentagonal bipyramids, corners with five equivalent C(3)Sc5CrC pentagonal bipyramids, edges with two equivalent C(1)Sc4Cr2 octahedra,  an edgeedge with one C(3)Sc5CrC pentagonal bipyramid, edges with two equivalent C(2)Sc4Cr2C pentagonal bipyramids,  a faceface with one C(3)Sc5CrC pentagonal bipyramid, and faces with two equivalent C(2)Sc4Cr2C pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 44-59°. In the third C site, C(3) is bonded to one Sc(2), two equivalent Sc(1), two equivalent Sc(3), one Cr(1), and one C(2) atom to form distorted CSc5CrC pentagonal bipyramids that share corners with three equivalent C(3)Sc5CrC pentagonal bipyramids, corners with four equivalent Sc(1)C7 pentagonal bipyramids, corners with five equivalent C(2)Sc4Cr2C pentagonal bipyramids, edges with six equivalent C(1)Sc4Cr2 octahedra,  an edgeedge with one C(2)Sc4Cr2C pentagonal bipyramid, edges with three equivalent C(3)Sc5CrC pentagonal bipyramids, and  a faceface with one C(2)Sc4Cr2C pentagonal bipyramid. is represented by the CIF file [CIF]
data_Sc2CrC3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.292
_cell_length_b   5.782
_cell_length_c   14.106
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   268.541
_cell_formula_units_Z   4
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
  Sc  Sc0  1  0.000  0.377  0.813  1.0
  Sc  Sc1  1  0.000  0.623  0.187  1.0
  Sc  Sc2  1  0.000  0.877  0.687  1.0
  Sc  Sc3  1  0.000  0.123  0.313  1.0
  Sc  Sc4  1  0.500  0.500  0.000  1.0
  Sc  Sc5  1  0.000  0.000  0.000  1.0
  Sc  Sc6  1  0.500  0.000  0.500  1.0
  Sc  Sc7  1  0.000  0.500  0.500  1.0
  Cr  Cr8  1  0.500  0.799  0.846  1.0
  Cr  Cr9  1  0.500  0.201  0.154  1.0
  Cr  Cr10  1  0.500  0.299  0.654  1.0
  Cr  Cr11  1  0.500  0.701  0.346  1.0
  C  C12  1  0.000  0.317  0.092  1.0
  C  C13  1  0.000  0.183  0.592  1.0
  C  C14  1  0.000  0.683  0.908  1.0
  C  C15  1  0.500  0.606  0.722  1.0
  C  C16  1  0.000  0.817  0.408  1.0
  C  C17  1  0.500  0.106  0.778  1.0
  C  C18  1  0.500  0.361  0.383  1.0
  C  C19  1  0.500  0.139  0.883  1.0
  C  C20  1  0.500  0.861  0.117  1.0
  C  C21  1  0.500  0.894  0.222  1.0
  C  C22  1  0.500  0.394  0.278  1.0
  C  C23  1  0.500  0.639  0.617  1.0
[/CIF]
.