data_KYMgFe
_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   KYMgFe
_chemical_formula_sum   'K1 Y1 Mg1 Fe1'
_cell_volume   98.27
_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  K1  1  0.66  0.66  0.66  1.0
  Y  Y3  1  0.83  0.83  0.83  1.0
  Mg  Mg2  1  0.0  0.0  0.0  1.0
  Fe  Fe0  1  0.49  0.49  0.49  1.0

data_KYMgFe
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   12.69
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   KYMgFe
_chemical_formula_sum   'K3 Y3 Mg3 Fe3'
_cell_volume   294.8
_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  0.34  1.0
  Y  Y1  3  0.0  0.0  0.17  1.0
  Mg  Mg2  3  0.0  0.0  0.0  1.0
  Fe  Fe3  3  0.0  0.0  0.51  1.0

K Y Mg Fe
KMgYFe crystallizes in the trigonal R3m space group. K(1) is bonded in a distorted linear geometry to three equivalent Mg(1), one Y(1), and one Fe(1) atom. All K(1)-Mg(1) bond lengths are 2.99 Å. The K(1)-Y(1) bond length is 2.14 Å. The K(1)-Fe(1) bond length is 2.14 Å. Mg(1) is bonded to three equivalent K(1) and one Y(1) atom to form MgK3Y trigonal pyramids that share corners with three equivalent Y(1)KMgFe3 trigonal bipyramids and corners with six equivalent Mg(1)K3Y trigonal pyramids. The Mg(1)-Y(1) bond length is 2.14 Å. Y(1) is bonded to one K(1), one Mg(1), and three equivalent Fe(1) atoms to form distorted YKMgFe3 trigonal bipyramids that share corners with six equivalent Y(1)KMgFe3 trigonal bipyramids and corners with three equivalent Mg(1)K3Y trigonal pyramids. All Y(1)-Fe(1) bond lengths are 2.99 Å. Fe(1) is bonded in a distorted single-bond geometry to one K(1) and three equivalent Y(1) atoms.