data_NaSrCrGa
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.22
_cell_length_b   5.22
_cell_length_c   5.22
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaSrCrGa
_chemical_formula_sum   'Na1 Sr1 Cr1 Ga1'
_cell_volume   100.38
_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
  Na  Na2  1  0.0  0.0  0.0  1.0
  Sr  Sr3  1  0.84  0.84  0.84  1.0
  Cr  Cr0  1  0.53  0.53  0.53  1.0
  Ga  Ga1  1  0.69  0.69  0.69  1.0

data_NaSrCrGa
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.22
_cell_length_b   5.22
_cell_length_c   12.78
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   NaSrCrGa
_chemical_formula_sum   'Na3 Sr3 Cr3 Ga3'
_cell_volume   301.14
_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
  Na  Na0  3  0.0  0.0  0.0  1.0
  Sr  Sr1  3  0.0  0.0  0.16  1.0
  Cr  Cr2  3  0.0  0.0  0.47  1.0
  Ga  Ga3  3  0.0  0.0  0.31  1.0

Na Sr Cr Ga
NaSrCrGa crystallizes in the trigonal R3m space group. Na(1) is bonded to one Sr(1) and three equivalent Ga(1) atoms to form NaSrGa3 trigonal pyramids that share  a cornercorner with one Ga(1)Na3SrCr trigonal bipyramid, corners with six equivalent Na(1)SrGa3 trigonal pyramids, and edges with three equivalent Cr(1)Sr3Ga trigonal pyramids. The Na(1)-Sr(1) bond length is 1.99 Å. All Na(1)-Ga(1) bond lengths are 3.02 Å. Sr(1) is bonded in a distorted single-bond geometry to one Na(1), three equivalent Cr(1), and one Ga(1) atom. All Sr(1)-Cr(1) bond lengths are 3.02 Å. The Sr(1)-Ga(1) bond length is 1.99 Å. Cr(1) is bonded to three equivalent Sr(1) and one Ga(1) atom to form distorted CrSr3Ga trigonal pyramids that share corners with three equivalent Ga(1)Na3SrCr trigonal bipyramids, corners with six equivalent Cr(1)Sr3Ga trigonal pyramids, and edges with three equivalent Na(1)SrGa3 trigonal pyramids. The Cr(1)-Ga(1) bond length is 1.99 Å. Ga(1) is bonded to three equivalent Na(1), one Sr(1), and one Cr(1) atom to form distorted GaNa3SrCr trigonal bipyramids that share corners with six equivalent Ga(1)Na3SrCr trigonal bipyramids,  a cornercorner with one Na(1)SrGa3 trigonal pyramid, and corners with three equivalent Cr(1)Sr3Ga trigonal pyramids.