data_SrBe4Cr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.9
_cell_length_b   4.9
_cell_length_c   4.9
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrBe4Cr
_chemical_formula_sum   'Sr1 Be4 Cr1'
_cell_volume   82.96
_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  Sr5  1  0.19  0.19  0.19  1.0
  Be  Be0  1  0.37  0.55  0.37  1.0
  Be  Be1  1  0.55  0.37  0.37  1.0
  Be  Be2  1  0.55  0.55  0.55  1.0
  Be  Be3  1  0.37  0.37  0.55  1.0
  Cr  Cr4  1  0.0  0.0  0.0  1.0

data_SrBe4Cr
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.9
_cell_length_b   4.9
_cell_length_c   11.99
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   SrBe4Cr
_chemical_formula_sum   'Sr3 Be12 Cr3'
_cell_volume   248.87
_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  0.81  1.0
  Be  Be1  9  0.06  0.12  0.57  1.0
  Be  Be2  3  0.0  0.0  0.45  1.0
  Cr  Cr3  3  0.0  0.0  0.0  1.0

Sr Be Be Be Be Cr
SrBe4Cr crystallizes in the trigonal R3m space group. Sr(1) is bonded in a 13-coordinate geometry to three equivalent Be(2), six equivalent Be(1), and four equivalent Cr(1) atoms. All Sr(1)-Be(2) bond lengths are 2.84 Å. There are three shorter (2.58 Å) and three longer (2.91 Å) Sr(1)-Be(1) bond lengths. There is one shorter (2.31 Å) and three longer (3.29 Å) Sr(1)-Cr(1) bond lengths. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded in a 2-coordinate geometry to two equivalent Sr(1), one Be(2), and two equivalent Be(1) atoms. The Be(1)-Be(2) bond length is 1.54 Å. Both Be(1)-Be(1) bond lengths are 0.89 Å. In the second Be site, Be(2) is bonded in a 6-coordinate geometry to three equivalent Sr(1) and three equivalent Be(1) atoms. Cr(1) is bonded in a distorted single-bond geometry to four equivalent Sr(1) atoms.