data_SrIn3C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.02
_cell_length_b   5.02
_cell_length_c   5.02
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrIn3C
_chemical_formula_sum   'Sr1 In3 C1'
_cell_volume   126.68
_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
  Sr  Sr0  1  0.51  0.51  0.51  1.0
  In  In2  1  0.0  0.51  0.0  1.0
  In  In3  1  0.0  0.0  0.51  1.0
  In  In4  1  0.51  0.0  0.0  1.0
  C  C1  1  0.0  0.0  0.0  1.0

data_SrIn3C
_symmetry_space_group_name_H-M   R3m
_cell_length_a   7.1
_cell_length_b   7.1
_cell_length_c   8.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   SrIn3C
_chemical_formula_sum   'Sr3 In9 C3'
_cell_volume   380.04
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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
  Sr  Sr0  3  0.0  0.0  0.51  1.0
  In  In1  9  0.01  0.5  0.5  1.0
  C  C2  3  0.0  0.0  0.0  1.0

Sr In In In C
SrIn3C is (Cubic) Perovskite structured and crystallizes in the trigonal R3m space group. Sr(1) is bonded to twelve equivalent In(1) atoms to form SrIn12 cuboctahedra that share corners with twelve equivalent Sr(1)In12 cuboctahedra, faces with six equivalent Sr(1)In12 cuboctahedra, and faces with eight equivalent C(1)In6 octahedra. There are a spread of Sr(1)-In(1) bond distances ranging from 3.47-3.63 Å. In(1) is bonded in a distorted linear geometry to four equivalent Sr(1) and two equivalent C(1) atoms. There is one shorter (2.46 Å) and one longer (2.57 Å) In(1)-C(1) bond length. C(1) is bonded to six equivalent In(1) atoms to form CIn6 octahedra that share corners with six equivalent C(1)In6 octahedra and faces with eight equivalent Sr(1)In12 cuboctahedra. The corner-sharing octahedra are not tilted.