data_YMgAgPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   5.18
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YMgAgPb
_chemical_formula_sum   'Y1 Mg1 Ag1 Pb1'
_cell_volume   98.03
_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  Y3  1  0.83  0.83  0.83  1.0
  Mg  Mg1  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.66  0.66  0.66  1.0
  Pb  Pb2  1  0.49  0.49  0.49  1.0

data_YMgAgPb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   12.68
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   YMgAgPb
_chemical_formula_sum   'Y3 Mg3 Ag3 Pb3'
_cell_volume   294.08
_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
  Y  Y0  3  0.0  0.0  0.17  1.0
  Mg  Mg1  3  0.0  0.0  0.0  1.0
  Ag  Ag2  3  0.0  0.0  0.34  1.0
  Pb  Pb3  3  0.0  0.0  0.51  1.0

Y Mg Ag Pb
Y Mg Ag Pb 0 2 o o o 0 1 + + + 2 3 o o o 
MgYAgPb crystallizes in the trigonal R3m space group. Mg(1) is bonded to one Y(1) and three equivalent Ag(1) atoms to form distorted MgYAg3 trigonal pyramids that share  a cornercorner with one Ag(1)YMg3Pb trigonal bipyramid, corners with three equivalent Y(1)MgAgPb3 trigonal bipyramids, corners with six equivalent Mg(1)YAg3 trigonal pyramids, and edges with three equivalent Pb(1)Y3Ag trigonal pyramids. The Mg(1)-Y(1) bond length is 2.16 Å. All Mg(1)-Ag(1) bond lengths are 2.99 Å. Y(1) is bonded to one Mg(1), one Ag(1), and three equivalent Pb(1) atoms to form distorted YMgAgPb3 trigonal bipyramids that share corners with six equivalent Y(1)MgAgPb3 trigonal bipyramids,  a cornercorner with one Pb(1)Y3Ag trigonal pyramid, corners with three equivalent Mg(1)YAg3 trigonal pyramids, and edges with three equivalent Ag(1)YMg3Pb trigonal bipyramids. The Y(1)-Ag(1) bond length is 2.16 Å. All Y(1)-Pb(1) bond lengths are 2.99 Å. Ag(1) is bonded to three equivalent Mg(1), one Y(1), and one Pb(1) atom to form distorted AgYMg3Pb trigonal bipyramids that share corners with six equivalent Ag(1)YMg3Pb trigonal bipyramids,  a cornercorner with one Mg(1)YAg3 trigonal pyramid, corners with three equivalent Pb(1)Y3Ag trigonal pyramids, and edges with three equivalent Y(1)MgAgPb3 trigonal bipyramids. The Ag(1)-Pb(1) bond length is 2.16 Å. Pb(1) is bonded to three equivalent Y(1) and one Ag(1) atom to form distorted PbY3Ag trigonal pyramids that share  a cornercorner with one Y(1)MgAgPb3 trigonal bipyramid, corners with three equivalent Ag(1)YMg3Pb trigonal bipyramids, corners with six equivalent Pb(1)Y3Ag trigonal pyramids, and edges with three equivalent Mg(1)YAg3 trigonal pyramids.