The material structure described by SrMg6Ce crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Ce(1) atoms to form SrCe2Mg10 cuboctahedra that share corners with four equivalent Mg(4)Sr2Mg10 cuboctahedra, corners with six equivalent Sr(1)Ce2Mg10 cuboctahedra, edges with two equivalent Mg(4)Sr2Mg10 cuboctahedra, edges with four equivalent Ce(1)Sr2Mg10 cuboctahedra, faces with two equivalent Sr(1)Ce2Mg10 cuboctahedra, faces with two equivalent Mg(4)Sr2Mg10 cuboctahedra, faces with two equivalent Ce(1)Sr2Mg10 cuboctahedra, and faces with six equivalent Mg(2)Ce2Mg10 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 11-coordinate geometry to two equivalent Sr(1), one Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Ce(1) atoms. In the second Mg site, Mg(2) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Ce(1) atoms to form MgCe2Mg10 cuboctahedra that share corners with four equivalent Ce(1)Sr2Mg10 cuboctahedra, corners with six equivalent Mg(2)Ce2Mg10 cuboctahedra, edges with two equivalent Ce(1)Sr2Mg10 cuboctahedra, edges with four equivalent Mg(4)Sr2Mg10 cuboctahedra, faces with two equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with two equivalent Mg(4)Sr2Mg10 cuboctahedra, faces with two equivalent Ce(1)Sr2Mg10 cuboctahedra, and faces with six equivalent Sr(1)Ce2Mg10 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), and two equivalent Ce(1) atoms. In the fourth Mg site, Mg(4) is bonded to two equivalent Sr(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form MgSr2Mg10 cuboctahedra that share corners with four equivalent Sr(1)Ce2Mg10 cuboctahedra, corners with six equivalent Mg(4)Sr2Mg10 cuboctahedra, edges with two equivalent Sr(1)Ce2Mg10 cuboctahedra, edges with four equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with two equivalent Sr(1)Ce2Mg10 cuboctahedra, faces with two equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with two equivalent Mg(4)Sr2Mg10 cuboctahedra, and faces with six equivalent Ce(1)Sr2Mg10 cuboctahedra. Ce(1) is bonded to two equivalent Sr(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form CeSr2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Ce2Mg10 cuboctahedra, corners with six equivalent Ce(1)Sr2Mg10 cuboctahedra, edges with two equivalent Mg(2)Ce2Mg10 cuboctahedra, edges with four equivalent Sr(1)Ce2Mg10 cuboctahedra, faces with two equivalent Sr(1)Ce2Mg10 cuboctahedra, faces with two equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with two equivalent Ce(1)Sr2Mg10 cuboctahedra, and faces with six equivalent Mg(4)Sr2Mg10 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrCeMg6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.813
_cell_length_b   6.813
_cell_length_c   5.436
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   117.448
_symmetry_Int_Tables_number   1
_cell_volume   223.898
_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
  Sr  Sr0  1  0.655  0.345  0.500  1.0
  Ce  Ce1  1  0.849  0.151  0.000  1.0
  Mg  Mg2  1  0.842  0.673  0.000  1.0
  Mg  Mg3  1  0.327  0.158  0.000  1.0
  Mg  Mg4  1  0.341  0.659  0.000  1.0
  Mg  Mg5  1  0.666  0.841  0.500  1.0
  Mg  Mg6  1  0.159  0.334  0.500  1.0
  Mg  Mg7  1  0.161  0.839  0.500  1.0
[/CIF]
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The material structure described by SrMg6Ce crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Ce(1) atoms to form SrCe2Mg10 cuboctahedra that share corners with four equivalent Mg(4)Sr2Mg10 cuboctahedra, corners with six equivalent Sr(1)Ce2Mg10 cuboctahedra, edges with two equivalent Mg(4)Sr2Mg10 cuboctahedra, edges with four equivalent Ce(1)Sr2Mg10 cuboctahedra, faces with two equivalent Sr(1)Ce2Mg10 cuboctahedra, faces with two equivalent Mg(4)Sr2Mg10 cuboctahedra, faces with two equivalent Ce(1)Sr2Mg10 cuboctahedra, and faces with six equivalent Mg(2)Ce2Mg10 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 11-coordinate geometry to two equivalent Sr(1), one Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Ce(1) atoms. In the second Mg site, Mg(2) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Ce(1) atoms to form MgCe2Mg10 cuboctahedra that share corners with four equivalent Ce(1)Sr2Mg10 cuboctahedra, corners with six equivalent Mg(2)Ce2Mg10 cuboctahedra, edges with two equivalent Ce(1)Sr2Mg10 cuboctahedra, edges with four equivalent Mg(4)Sr2Mg10 cuboctahedra, faces with two equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with two equivalent Mg(4)Sr2Mg10 cuboctahedra, faces with two equivalent Ce(1)Sr2Mg10 cuboctahedra, and faces with six equivalent Sr(1)Ce2Mg10 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), and two equivalent Ce(1) atoms. In the fourth Mg site, Mg(4) is bonded to two equivalent Sr(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form MgSr2Mg10 cuboctahedra that share corners with four equivalent Sr(1)Ce2Mg10 cuboctahedra, corners with six equivalent Mg(4)Sr2Mg10 cuboctahedra, edges with two equivalent Sr(1)Ce2Mg10 cuboctahedra, edges with four equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with two equivalent Sr(1)Ce2Mg10 cuboctahedra, faces with two equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with two equivalent Mg(4)Sr2Mg10 cuboctahedra, and faces with six equivalent Ce(1)Sr2Mg10 cuboctahedra. Ce(1) is bonded to two equivalent Sr(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form CeSr2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Ce2Mg10 cuboctahedra, corners with six equivalent Ce(1)Sr2Mg10 cuboctahedra, edges with two equivalent Mg(2)Ce2Mg10 cuboctahedra, edges with four equivalent Sr(1)Ce2Mg10 cuboctahedra, faces with two equivalent Sr(1)Ce2Mg10 cuboctahedra, faces with two equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with two equivalent Ce(1)Sr2Mg10 cuboctahedra, and faces with six equivalent Mg(4)Sr2Mg10 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrCeMg6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.813
_cell_length_b   6.813
_cell_length_c   5.436
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   117.448
_symmetry_Int_Tables_number   1
_cell_volume   223.898
_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
  Sr  Sr0  1  0.655  0.345  0.500  1.0
  Ce  Ce1  1  0.849  0.151  0.000  1.0
  Mg  Mg2  1  0.842  0.673  0.000  1.0
  Mg  Mg3  1  0.327  0.158  0.000  1.0
  Mg  Mg4  1  0.341  0.659  0.000  1.0
  Mg  Mg5  1  0.666  0.841  0.500  1.0
  Mg  Mg6  1  0.159  0.334  0.500  1.0
  Mg  Mg7  1  0.161  0.839  0.500  1.0
[/CIF]
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