data_Ce(As3Os)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.47
_cell_length_b   7.47
_cell_length_c   7.47
_cell_angle_alpha   109.47
_cell_angle_beta   109.47
_cell_angle_gamma   109.47
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ce(As3Os)4
_chemical_formula_sum   'Ce1 As12 Os4'
_cell_volume   320.86
_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
  Ce  Ce0  1  0.0  0.0  0.0  1.0
  As  As1  1  0.03  0.31  0.68  1.0
  As  As2  1  0.29  0.0  0.64  1.0
  As  As3  1  0.03  0.31  0.32  1.0
  As  As4  1  0.29  0.0  0.99  1.0
  As  As5  1  0.31  0.68  0.03  1.0
  As  As6  1  0.0  0.64  0.29  1.0
  As  As7  1  0.31  0.32  0.03  1.0
  As  As8  1  0.0  0.99  0.29  1.0
  As  As9  1  0.68  0.03  0.31  1.0
  As  As10  1  0.64  0.29  0.0  1.0
  As  As11  1  0.32  0.03  0.31  1.0
  As  As12  1  0.99  0.29  0.0  1.0
  Os  Os13  1  0.16  0.16  0.84  1.0
  Os  Os14  1  0.84  0.16  0.16  1.0
  Os  Os15  1  0.16  0.84  0.16  1.0
  Os  Os16  1  0.16  0.16  0.16  1.0

data_Ce(As3Os)4
_symmetry_space_group_name_H-M   R3
_cell_length_a   12.2
_cell_length_b   12.2
_cell_length_c   7.47
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   146
_chemical_formula_structural   Ce(As3Os)4
_chemical_formula_sum   'Ce3 As36 Os12'
_cell_volume   962.59
_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  'x+2/3, y+1/3, z+1/3'
  5  '-y+2/3, x-y+1/3, z+1/3'
  6  '-x+y+2/3, -x+1/3, z+1/3'
  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'
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
  Ce  Ce0  3  0.0  0.0  0.0  1.0
  As  As1  9  0.0  0.36  0.67  1.0
  As  As2  9  0.03  0.69  0.97  1.0
  As  As3  9  0.09  0.19  0.22  1.0
  As  As4  9  0.19  0.1  0.09  1.0
  Os  Os5  9  0.1  0.21  0.05  1.0
  Os  Os6  3  0.0  0.0  0.16  1.0

Ce As As As As As As As As As As As As Os Os Os Os
Ce As As As As As As As As As As As As Os Os Os Os 0 16 o o o 0 4 o o - 0 8 o - o 0 12 - o o 1 9 - o o 1 12 - o + 1 13 o o o 1 3 o o o 1 7 o o + 1 5 o o + 2 8 o - o 2 6 o - o 2 13 o o o 2 11 o o o 2 10 o o + 2 4 o o o 3 14 - o o 3 6 o o o 3 8 o - o 3 9 - o o 3 12 - o o 4 15 o - + 4 7 o o + 4 13 o o o 4 16 o o + 4 11 o o + 4 5 o - + 4 10 o o + 5 11 o + o 5 15 o o o 5 7 o o o 5 9 o + o 6 10 - o o 6 8 o o o 6 12 - o o 6 15 o o o 7 13 o o - 7 10 o o o 7 12 - o o 8 14 - + o 8 15 o o o 8 16 o + o 8 11 o + o 8 9 - + o 9 11 o o o 9 14 o o o 10 14 o o o 10 12 o o o 11 15 o - o 12 14 o o o 12 13 + o - 12 16 + o o 
CeOs4As12 crystallizes in the trigonal R3 space group. Ce(1) is bonded in a single-bond geometry to one Os(2) and three equivalent As(4) atoms. The Ce(1)-Os(2) bond length is 1.17 Å. All Ce(1)-As(4) bond lengths are 2.17 Å. There are two inequivalent Os sites. In the first Os site, Os(1) is bonded in a distorted single-bond geometry to one As(1), one As(2), one As(3), and two equivalent As(4) atoms. The Os(1)-As(1) bond length is 2.19 Å. The Os(1)-As(2) bond length is 2.29 Å. The Os(1)-As(3) bond length is 1.27 Å. There is one shorter (2.09 Å) and one longer (2.22 Å) Os(1)-As(4) bond length. In the second Os site, Os(2) is bonded in a single-bond geometry to one Ce(1) and three equivalent As(4) atoms. All Os(2)-As(4) bond lengths are 2.11 Å. There are four inequivalent As sites. In the first As site, As(1) is bonded in a 1-coordinate geometry to one Os(1) and two equivalent As(4) atoms. There is one shorter (2.60 Å) and one longer (2.99 Å) As(1)-As(4) bond length. In the second As site, As(2) is bonded in a 6-coordinate geometry to one Os(1), one As(3), two equivalent As(2), and two equivalent As(4) atoms. The As(2)-As(3) bond length is 2.60 Å. Both As(2)-As(2) bond lengths are 2.54 Å. There is one shorter (2.62 Å) and one longer (2.73 Å) As(2)-As(4) bond length. In the third As site, As(3) is bonded in a single-bond geometry to one Os(1), one As(2), and two equivalent As(4) atoms. Both As(3)-As(4) bond lengths are 2.27 Å. In the fourth As site, As(4) is bonded in a 10-coordinate geometry to one Ce(1), one Os(2), two equivalent Os(1), two equivalent As(1), two equivalent As(2), and two equivalent As(3) atoms.