data_YMgBe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.58
_cell_length_b   4.58
_cell_length_c   3.54
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YMgBe
_chemical_formula_sum   'Y1 Mg1 Be1'
_cell_volume   64.15
_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  0.29  0.32  0.38  1.0
  Mg  Mg1  1  0.0  0.64  0.61  1.0
  Be  Be0  1  0.0  0.0  0.55  1.0

data_YMgBe
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.54
_cell_length_b   4.58
_cell_length_c   4.58
_cell_angle_alpha   120.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YMgBe
_chemical_formula_sum   'Y1 Mg1 Be1'
_cell_volume   64.15
_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  Y0  1  0.38  0.29  0.32  1.0
  Mg  Mg1  1  0.61  0.0  0.64  1.0
  Be  Be2  1  0.55  0.0  0.0  1.0

Y Mg Be
Y Mg Be 0 2 o o o 1 2 o + o 
MgBeY is Hg_xSn structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one MgBeY cluster. Mg(1) is bonded in a distorted single-bond geometry to one Be(1) atom. The Mg(1)-Be(1) bond length is 1.65 Å. Be(1) is bonded in a bent 120 degrees geometry to one Mg(1) and one Y(1) atom. The Be(1)-Y(1) bond length is 1.52 Å. Y(1) is bonded in a single-bond geometry to one Be(1) atom.