data_KMgBeAg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.01
_cell_length_b   5.01
_cell_length_c   5.01
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KMgBeAg
_chemical_formula_sum   'K1 Mg1 Be1 Ag1'
_cell_volume   88.8
_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
  K  K2  1  0.31  0.31  0.31  1.0
  Mg  Mg3  1  0.54  0.54  0.54  1.0
  Be  Be1  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.77  0.77  0.77  1.0

data_KMgBeAg
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.01
_cell_length_b   5.01
_cell_length_c   12.27
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   KMgBeAg
_chemical_formula_sum   'K3 Mg3 Be3 Ag3'
_cell_volume   266.39
_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
  K  K0  3  0.0  0.0  0.69  1.0
  Mg  Mg1  3  0.0  0.0  0.46  1.0
  Be  Be2  3  0.0  0.0  0.0  1.0
  Ag  Ag3  3  0.0  0.0  0.23  1.0

K Mg Be Ag
KMgBeAg crystallizes in the trigonal R3m space group. K(1) is bonded in a 10-coordinate geometry to four equivalent Mg(1), three equivalent Be(1), and three equivalent Ag(1) atoms. There is one shorter (2.82 Å) and three longer (3.16 Å) K(1)-Mg(1) bond lengths. All K(1)-Be(1) bond lengths are 2.90 Å. All K(1)-Ag(1) bond lengths are 3.28 Å. Mg(1) is bonded in a body-centered cubic geometry to four equivalent K(1) and four equivalent Ag(1) atoms. There is one shorter (2.82 Å) and three longer (3.16 Å) Mg(1)-Ag(1) bond lengths. Be(1) is bonded to three equivalent K(1) and one Ag(1) atom to form distorted corner-sharing BeK3Ag trigonal pyramids. The Be(1)-Ag(1) bond length is 2.82 Å. Ag(1) is bonded in a 8-coordinate geometry to three equivalent K(1), four equivalent Mg(1), and one Be(1) atom.