The structure described by RbMg6C crystallizes in the orthorhombic Amm2 space group. Rb(1) is bonded in a 12-coordinate geometry to two equivalent Rb(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), and four equivalent Mg(3) atoms. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in an L-shaped geometry to one Rb(1), one Mg(2), two equivalent Mg(4), and two equivalent C(1) atoms. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to two equivalent Rb(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), and four equivalent Mg(3) atoms. In the third Mg site, Mg(3) is bonded in a single-bond geometry to two equivalent Rb(1), one Mg(4), two equivalent Mg(2), and one C(1) atom. In the fourth Mg site, Mg(4) is bonded to two equivalent Rb(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and four equivalent Mg(1) atoms to form MgRb2Mg10 cuboctahedra that share corners with two equivalent Mg(4)Rb2Mg10 cuboctahedra, corners with four equivalent C(1)Mg6 pentagonal pyramids, faces with two equivalent Mg(4)Rb2Mg10 cuboctahedra, and faces with two equivalent C(1)Mg6 pentagonal pyramids. C(1) is bonded to two equivalent Mg(3) and four equivalent Mg(1) atoms to form distorted CMg6 pentagonal pyramids that share corners with four equivalent Mg(4)Rb2Mg10 cuboctahedra, edges with two equivalent C(1)Mg6 pentagonal pyramids, and faces with two equivalent Mg(4)Rb2Mg10 cuboctahedra. is represented by the CIF file [CIF]
data_RbMg6C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.283
_cell_length_b   8.311
_cell_length_c   8.392
_cell_angle_alpha   119.684
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   198.939
_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
  C  C0  1  0.500  0.593  0.187  1.0
  Mg  Mg1  1  0.000  0.455  0.256  1.0
  Mg  Mg2  1  1.000  0.801  0.256  1.0
  Mg  Mg3  1  0.000  0.290  0.579  1.0
  Mg  Mg4  1  0.500  0.297  0.927  1.0
  Mg  Mg5  1  0.500  0.630  0.927  1.0
  Mg  Mg6  1  0.500  0.092  0.184  1.0
  Rb  Rb7  1  0.000  0.842  0.684  1.0
[/CIF]
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The structure described by RbMg6C crystallizes in the orthorhombic Amm2 space group. Rb(1) is bonded in a 12-coordinate geometry to two equivalent Rb(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), and four equivalent Mg(3) atoms. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in an L-shaped geometry to one Rb(1), one Mg(2), two equivalent Mg(4), and two equivalent C(1) atoms. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to two equivalent Rb(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), and four equivalent Mg(3) atoms. In the third Mg site, Mg(3) is bonded in a single-bond geometry to two equivalent Rb(1), one Mg(4), two equivalent Mg(2), and one C(1) atom. In the fourth Mg site, Mg(4) is bonded to two equivalent Rb(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and four equivalent Mg(1) atoms to form MgRb2Mg10 cuboctahedra that share corners with two equivalent Mg(4)Rb2Mg10 cuboctahedra, corners with four equivalent C(1)Mg6 pentagonal pyramids, faces with two equivalent Mg(4)Rb2Mg10 cuboctahedra, and faces with two equivalent C(1)Mg6 pentagonal pyramids. C(1) is bonded to two equivalent Mg(3) and four equivalent Mg(1) atoms to form distorted CMg6 pentagonal pyramids that share corners with four equivalent Mg(4)Rb2Mg10 cuboctahedra, edges with two equivalent C(1)Mg6 pentagonal pyramids, and faces with two equivalent Mg(4)Rb2Mg10 cuboctahedra. is represented by the CIF file [CIF]
data_RbMg6C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.283
_cell_length_b   8.311
_cell_length_c   8.392
_cell_angle_alpha   119.684
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   198.939
_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
  C  C0  1  0.500  0.593  0.187  1.0
  Mg  Mg1  1  0.000  0.455  0.256  1.0
  Mg  Mg2  1  1.000  0.801  0.256  1.0
  Mg  Mg3  1  0.000  0.290  0.579  1.0
  Mg  Mg4  1  0.500  0.297  0.927  1.0
  Mg  Mg5  1  0.500  0.630  0.927  1.0
  Mg  Mg6  1  0.500  0.092  0.184  1.0
  Rb  Rb7  1  0.000  0.842  0.684  1.0
[/CIF]
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