The compound described by Rb2Mg is Khatyrkite structured and crystallizes in the tetragonal I4/mcm space group. Rb(1) is bonded in a 4-coordinate geometry to four equivalent Mg(1) atoms. Mg(1) is bonded in a 8-coordinate geometry to eight equivalent Rb(1) atoms. is represented by the CIF file [CIF]
data_Rb2Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.929
_cell_length_b   7.929
_cell_length_c   7.929
_cell_angle_alpha   101.770
_cell_angle_beta   101.770
_cell_angle_gamma   126.301
_symmetry_Int_Tables_number   1
_cell_volume   358.497
_cell_formula_units_Z   2
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
  Rb  Rb0  1  0.666  0.834  0.500  1.0
  Rb  Rb1  1  0.334  0.166  0.500  1.0
  Rb  Rb2  1  0.166  0.666  0.831  1.0
  Rb  Rb3  1  0.834  0.334  0.169  1.0
  Mg  Mg4  1  0.750  0.750  0.000  1.0
  Mg  Mg5  1  0.250  0.250  0.000  1.0
[/CIF]
.
The compound described by Rb2Mg is Khatyrkite structured and crystallizes in the tetragonal I4/mcm space group. Rb(1) is bonded in a 4-coordinate geometry to four equivalent Mg(1) atoms. Mg(1) is bonded in a 8-coordinate geometry to eight equivalent Rb(1) atoms. is represented by the CIF file [CIF]
data_Rb2Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.929
_cell_length_b   7.929
_cell_length_c   7.929
_cell_angle_alpha   101.770
_cell_angle_beta   101.770
_cell_angle_gamma   126.301
_symmetry_Int_Tables_number   1
_cell_volume   358.497
_cell_formula_units_Z   2
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
  Rb  Rb0  1  0.666  0.834  0.500  1.0
  Rb  Rb1  1  0.334  0.166  0.500  1.0
  Rb  Rb2  1  0.166  0.666  0.831  1.0
  Rb  Rb3  1  0.834  0.334  0.169  1.0
  Mg  Mg4  1  0.750  0.750  0.000  1.0
  Mg  Mg5  1  0.250  0.250  0.000  1.0
[/CIF]
.