data_SrLaBeNb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.21
_cell_length_b   5.21
_cell_length_c   5.21
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrLaBeNb
_chemical_formula_sum   'Sr1 La1 Be1 Nb1'
_cell_volume   99.76
_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  Sr3  1  0.52  0.52  0.52  1.0
  La  La1  1  0.68  0.68  0.68  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0
  Nb  Nb2  1  0.84  0.84  0.84  1.0

data_SrLaBeNb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.21
_cell_length_b   5.21
_cell_length_c   12.75
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   SrLaBeNb
_chemical_formula_sum   'Sr3 La3 Be3 Nb3'
_cell_volume   299.28
_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  0.48  1.0
  La  La1  3  0.0  0.0  0.32  1.0
  Be  Be2  3  0.0  0.0  0.0  1.0
  Nb  Nb3  3  0.0  0.0  0.16  1.0

Sr La Be Nb
Sr La Be Nb 0 1 o o o 1 3 o o o 2 3 - - - 
SrBeLaNb crystallizes in the trigonal R3m space group. Sr(1) is bonded to one La(1) and three equivalent Nb(1) atoms to form SrLaNb3 trigonal pyramids that share  a cornercorner with one Nb(1)Sr3LaBe trigonal bipyramid, corners with six equivalent Sr(1)LaNb3 trigonal pyramids, and edges with three equivalent Be(1)La3Nb trigonal pyramids. The Sr(1)-La(1) bond length is 2.03 Å. All Sr(1)-Nb(1) bond lengths are 3.01 Å. Be(1) is bonded to three equivalent La(1) and one Nb(1) atom to form BeLa3Nb trigonal pyramids that share corners with three equivalent Nb(1)Sr3LaBe trigonal bipyramids, corners with six equivalent Be(1)La3Nb trigonal pyramids, and edges with three equivalent Sr(1)LaNb3 trigonal pyramids. All Be(1)-La(1) bond lengths are 3.01 Å. The Be(1)-Nb(1) bond length is 2.03 Å. La(1) is bonded in a 5-coordinate geometry to one Sr(1), three equivalent Be(1), and one Nb(1) atom. The La(1)-Nb(1) bond length is 2.03 Å. Nb(1) is bonded to three equivalent Sr(1), one Be(1), and one La(1) atom to form distorted NbSr3LaBe trigonal bipyramids that share corners with six equivalent Nb(1)Sr3LaBe trigonal bipyramids,  a cornercorner with one Sr(1)LaNb3 trigonal pyramid, and corners with three equivalent Be(1)La3Nb trigonal pyramids.