The material structure described by RbMg7 crystallizes in the hexagonal P-6m2 space group. Rb(1) is bonded to six equivalent Mg(1) and six equivalent Mg(2) atoms to form RbMg12 cuboctahedra that share corners with six equivalent Rb(1)Mg12 cuboctahedra, faces with two equivalent Rb(1)Mg12 cuboctahedra, and faces with six equivalent Mg(3)Mg12 cuboctahedra. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 2-coordinate geometry to two equivalent Rb(1), two equivalent Mg(3), and four equivalent Mg(2) atoms. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Rb(1), two equivalent Mg(2), two equivalent Mg(3), and four equivalent Mg(1) atoms. In the third Mg site, Mg(3) is bonded to six equivalent Mg(1) and six equivalent Mg(2) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(3)Mg12 cuboctahedra, faces with two equivalent Mg(3)Mg12 cuboctahedra, and faces with six equivalent Rb(1)Mg12 cuboctahedra. is represented by the CIF card [CIF]
data_RbMg7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.925
_cell_length_b   6.925
_cell_length_c   5.409
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   224.640
_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
  Rb  Rb0  1  0.667  0.333  0.500  1.0
  Mg  Mg1  1  0.163  0.326  0.500  1.0
  Mg  Mg2  1  0.674  0.837  0.500  1.0
  Mg  Mg3  1  0.163  0.837  0.500  1.0
  Mg  Mg4  1  0.848  0.152  0.000  1.0
  Mg  Mg5  1  0.304  0.152  0.000  1.0
  Mg  Mg6  1  0.848  0.696  0.000  1.0
  Mg  Mg7  1  0.333  0.667  0.000  1.0
[/CIF]
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The material structure described by RbMg7 crystallizes in the hexagonal P-6m2 space group. Rb(1) is bonded to six equivalent Mg(1) and six equivalent Mg(2) atoms to form RbMg12 cuboctahedra that share corners with six equivalent Rb(1)Mg12 cuboctahedra, faces with two equivalent Rb(1)Mg12 cuboctahedra, and faces with six equivalent Mg(3)Mg12 cuboctahedra. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 2-coordinate geometry to two equivalent Rb(1), two equivalent Mg(3), and four equivalent Mg(2) atoms. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Rb(1), two equivalent Mg(2), two equivalent Mg(3), and four equivalent Mg(1) atoms. In the third Mg site, Mg(3) is bonded to six equivalent Mg(1) and six equivalent Mg(2) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(3)Mg12 cuboctahedra, faces with two equivalent Mg(3)Mg12 cuboctahedra, and faces with six equivalent Rb(1)Mg12 cuboctahedra. is represented by the CIF card [CIF]
data_RbMg7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.925
_cell_length_b   6.925
_cell_length_c   5.409
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   224.640
_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
  Rb  Rb0  1  0.667  0.333  0.500  1.0
  Mg  Mg1  1  0.163  0.326  0.500  1.0
  Mg  Mg2  1  0.674  0.837  0.500  1.0
  Mg  Mg3  1  0.163  0.837  0.500  1.0
  Mg  Mg4  1  0.848  0.152  0.000  1.0
  Mg  Mg5  1  0.304  0.152  0.000  1.0
  Mg  Mg6  1  0.848  0.696  0.000  1.0
  Mg  Mg7  1  0.333  0.667  0.000  1.0
[/CIF]
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