data_Y2BeCr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.84
_cell_length_b   4.84
_cell_length_c   4.84
_cell_angle_alpha   120.72
_cell_angle_beta   120.72
_cell_angle_gamma   88.76
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y2BeCr
_chemical_formula_sum   'Y2 Be1 Cr1'
_cell_volume   79.31
_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
  Y  Y2  1  0.0  0.39  0.73  1.0
  Y  Y3  1  0.39  0.0  0.73  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0
  Cr  Cr1  1  0.0  0.0  0.46  1.0

data_Y2BeCr
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.77
_cell_length_b   6.77
_cell_length_c   4.84
_cell_angle_alpha   90.0
_cell_angle_beta   134.38
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Y2BeCr
_chemical_formula_sum   'Y4 Be2 Cr2'
_cell_volume   158.61
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Y  Y0  4  0.47  0.2  0.66  1.0
  Be  Be1  2  0.0  0.0  0.0  1.0
  Cr  Cr2  2  0.04  0.5  0.54  1.0

Y Y Be Cr
BeY2Cr crystallizes in the monoclinic Cm space group. Be(1) is bonded in a 6-coordinate geometry to four equivalent Y(1) and two equivalent Cr(1) atoms. There are two shorter (2.53 Å) and two longer (2.81 Å) Be(1)-Y(1) bond lengths. There is one shorter (2.23 Å) and one longer (2.62 Å) Be(1)-Cr(1) bond length. Y(1) is bonded in a distorted single-bond geometry to two equivalent Be(1) and one Cr(1) atom. The Y(1)-Cr(1) bond length is 1.67 Å. Cr(1) is bonded in a distorted water-like geometry to two equivalent Be(1) and two equivalent Y(1) atoms.