The structure described by SrMg14Cr crystallizes in the hexagonal P-6m2 space group. Sr(1) is bonded to six Mg(1,1) and six Mg(3,3) atoms to form SrMg12 cuboctahedra that share corners with six equivalent Sr(1)Mg12 cuboctahedra; corners with twelve equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with six Mg(1,1)Sr2Mg10 cuboctahedra; edges with twelve Mg(3,3)SrMg10Cr cuboctahedra; faces with two equivalent Cr(1)Mg12 cuboctahedra; faces with six equivalent Mg(4)Mg12 cuboctahedra; faces with six Mg(1,1)Sr2Mg10 cuboctahedra; and faces with six Mg(3,3)SrMg10Cr cuboctahedra. There are six inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Sr(1), two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(3) atoms to form distorted MgSr2Mg10 cuboctahedra that share corners with four equivalent Cr(1)Mg12 cuboctahedra; corners with six equivalent Mg(1)Sr2Mg10 cuboctahedra; corners with eight equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with two equivalent Sr(1)Mg12 cuboctahedra; edges with four equivalent Mg(4)Mg12 cuboctahedra; edges with four equivalent Mg(1)Sr2Mg10 cuboctahedra; edges with eight equivalent Mg(3)SrMg10Cr cuboctahedra; faces with two equivalent Sr(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with four equivalent Mg(1)Sr2Mg10 cuboctahedra; and faces with ten Mg(3,3)SrMg10Cr cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(4), four equivalent Mg(2), four equivalent Mg(3), and two equivalent Cr(1) atoms to form MgMg10Cr2 cuboctahedra that share corners with four equivalent Sr(1)Mg12 cuboctahedra; corners with six equivalent Mg(2)Mg10Cr2 cuboctahedra; corners with eight equivalent Mg(1)Sr2Mg10 cuboctahedra; edges with two equivalent Cr(1)Mg12 cuboctahedra; edges with four equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with four equivalent Mg(4)Mg12 cuboctahedra; edges with eight equivalent Mg(3)SrMg10Cr cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with two equivalent Mg(1)Sr2Mg10 cuboctahedra; faces with two equivalent Cr(1)Mg12 cuboctahedra; faces with four equivalent Mg(2)Mg10Cr2 cuboctahedra; and faces with ten Mg(3,3)SrMg10Cr cuboctahedra. In the third Mg site, Mg(1) is bonded to two equivalent Sr(1); two equivalent Mg(4); four Mg(1,1); and four Mg(3,3) atoms to form distorted MgSr2Mg10 cuboctahedra that share corners with four equivalent Cr(1)Mg12 cuboctahedra; corners with six equivalent Mg(1)Sr2Mg10 cuboctahedra; corners with eight equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with two equivalent Sr(1)Mg12 cuboctahedra; edges with four equivalent Mg(4)Mg12 cuboctahedra; edges with four Mg(1,1)Sr2Mg10 cuboctahedra; edges with eight Mg(3,3)SrMg10Cr cuboctahedra; faces with two equivalent Sr(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with four Mg(1,1)Sr2Mg10 cuboctahedra; and faces with ten Mg(3,3)SrMg10Cr cuboctahedra. In the fourth Mg site, Mg(3) is bonded to one Sr(1); two Mg(1,1); two equivalent Mg(2); two equivalent Mg(4); four Mg(3,3); and one Cr(1) atom to form distorted MgSrMg10Cr cuboctahedra that share corners with four equivalent Mg(4)Mg12 cuboctahedra; corners with fourteen Mg(3,3)SrMg10Cr cuboctahedra; edges with two equivalent Sr(1)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Cr(1)Mg12 cuboctahedra; edges with four equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with four Mg(1,1)Sr2Mg10 cuboctahedra; edges with four Mg(3,3)SrMg10Cr cuboctahedra;  a faceface with one Sr(1)Mg12 cuboctahedra;  a faceface with one Cr(1)Mg12 cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with five equivalent Mg(2)Mg10Cr2 cuboctahedra; faces with five Mg(1,1)Sr2Mg10 cuboctahedra; and faces with six Mg(3,3)SrMg10Cr cuboctahedra. In the fifth Mg site, Mg(3) is bonded to one Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), four equivalent Mg(3), and one Cr(1) atom to form distorted MgSrMg10Cr cuboctahedra that share corners with four equivalent Mg(4)Mg12 cuboctahedra; corners with fourteen Mg(3,3)SrMg10Cr cuboctahedra; edges with two equivalent Sr(1)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Cr(1)Mg12 cuboctahedra; edges with four equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with four equivalent Mg(1)Sr2Mg10 cuboctahedra; edges with four equivalent Mg(3)SrMg10Cr cuboctahedra;  a faceface with one Sr(1)Mg12 cuboctahedra;  a faceface with one Cr(1)Mg12 cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with five equivalent Mg(2)Mg10Cr2 cuboctahedra; faces with five Mg(1,1)Sr2Mg10 cuboctahedra; and faces with six Mg(3,3)SrMg10Cr cuboctahedra. In the sixth Mg site, Mg(4) is bonded to three Mg(1,1); three equivalent Mg(2); and six Mg(3,3) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(4)Mg12 cuboctahedra; corners with twelve Mg(3,3)SrMg10Cr cuboctahedra; edges with six equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with six Mg(1,1)Sr2Mg10 cuboctahedra; edges with six Mg(3,3)SrMg10Cr cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with three equivalent Sr(1)Mg12 cuboctahedra; faces with three equivalent Mg(2)Mg10Cr2 cuboctahedra; faces with three Mg(1,1)Sr2Mg10 cuboctahedra; faces with three equivalent Cr(1)Mg12 cuboctahedra; and faces with six Mg(3,3)SrMg10Cr cuboctahedra. Cr(1) is bonded to six equivalent Mg(2) and six Mg(3,3) atoms to form CrMg12 cuboctahedra that share corners with six equivalent Cr(1)Mg12 cuboctahedra; corners with twelve Mg(1,1)Sr2Mg10 cuboctahedra; edges with six equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with twelve Mg(3,3)SrMg10Cr cuboctahedra; faces with two equivalent Sr(1)Mg12 cuboctahedra; faces with six equivalent Mg(2)Mg10Cr2 cuboctahedra; faces with six equivalent Mg(4)Mg12 cuboctahedra; and faces with six Mg(3,3)SrMg10Cr cuboctahedra. is represented by the CIF card [CIF]
data_SrMg14Cr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.495
_cell_length_b   6.495
_cell_length_c   10.432
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   381.136
_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  0.167  0.333  0.125  1.0
  Mg  Mg1  1  0.175  0.837  0.125  1.0
  Mg  Mg2  1  0.166  0.833  0.625  1.0
  Mg  Mg3  1  0.663  0.325  0.125  1.0
  Mg  Mg4  1  0.667  0.334  0.625  1.0
  Mg  Mg5  1  0.663  0.837  0.125  1.0
  Mg  Mg6  1  0.667  0.833  0.625  1.0
  Mg  Mg7  1  0.335  0.165  0.389  1.0
  Mg  Mg8  1  0.335  0.165  0.861  1.0
  Mg  Mg9  1  0.335  0.670  0.389  1.0
  Mg  Mg10  1  0.335  0.670  0.861  1.0
  Mg  Mg11  1  0.830  0.165  0.389  1.0
  Mg  Mg12  1  0.830  0.165  0.861  1.0
  Mg  Mg13  1  0.833  0.667  0.369  1.0
  Mg  Mg14  1  0.833  0.667  0.881  1.0
  Cr  Cr15  1  0.167  0.333  0.625  1.0
[/CIF]
.
The structure described by SrMg14Cr crystallizes in the hexagonal P-6m2 space group. Sr(1) is bonded to six Mg(1,1) and six Mg(3,3) atoms to form SrMg12 cuboctahedra that share corners with six equivalent Sr(1)Mg12 cuboctahedra; corners with twelve equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with six Mg(1,1)Sr2Mg10 cuboctahedra; edges with twelve Mg(3,3)SrMg10Cr cuboctahedra; faces with two equivalent Cr(1)Mg12 cuboctahedra; faces with six equivalent Mg(4)Mg12 cuboctahedra; faces with six Mg(1,1)Sr2Mg10 cuboctahedra; and faces with six Mg(3,3)SrMg10Cr cuboctahedra. There are six inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Sr(1), two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(3) atoms to form distorted MgSr2Mg10 cuboctahedra that share corners with four equivalent Cr(1)Mg12 cuboctahedra; corners with six equivalent Mg(1)Sr2Mg10 cuboctahedra; corners with eight equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with two equivalent Sr(1)Mg12 cuboctahedra; edges with four equivalent Mg(4)Mg12 cuboctahedra; edges with four equivalent Mg(1)Sr2Mg10 cuboctahedra; edges with eight equivalent Mg(3)SrMg10Cr cuboctahedra; faces with two equivalent Sr(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with four equivalent Mg(1)Sr2Mg10 cuboctahedra; and faces with ten Mg(3,3)SrMg10Cr cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(4), four equivalent Mg(2), four equivalent Mg(3), and two equivalent Cr(1) atoms to form MgMg10Cr2 cuboctahedra that share corners with four equivalent Sr(1)Mg12 cuboctahedra; corners with six equivalent Mg(2)Mg10Cr2 cuboctahedra; corners with eight equivalent Mg(1)Sr2Mg10 cuboctahedra; edges with two equivalent Cr(1)Mg12 cuboctahedra; edges with four equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with four equivalent Mg(4)Mg12 cuboctahedra; edges with eight equivalent Mg(3)SrMg10Cr cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with two equivalent Mg(1)Sr2Mg10 cuboctahedra; faces with two equivalent Cr(1)Mg12 cuboctahedra; faces with four equivalent Mg(2)Mg10Cr2 cuboctahedra; and faces with ten Mg(3,3)SrMg10Cr cuboctahedra. In the third Mg site, Mg(1) is bonded to two equivalent Sr(1); two equivalent Mg(4); four Mg(1,1); and four Mg(3,3) atoms to form distorted MgSr2Mg10 cuboctahedra that share corners with four equivalent Cr(1)Mg12 cuboctahedra; corners with six equivalent Mg(1)Sr2Mg10 cuboctahedra; corners with eight equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with two equivalent Sr(1)Mg12 cuboctahedra; edges with four equivalent Mg(4)Mg12 cuboctahedra; edges with four Mg(1,1)Sr2Mg10 cuboctahedra; edges with eight Mg(3,3)SrMg10Cr cuboctahedra; faces with two equivalent Sr(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg10Cr2 cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with four Mg(1,1)Sr2Mg10 cuboctahedra; and faces with ten Mg(3,3)SrMg10Cr cuboctahedra. In the fourth Mg site, Mg(3) is bonded to one Sr(1); two Mg(1,1); two equivalent Mg(2); two equivalent Mg(4); four Mg(3,3); and one Cr(1) atom to form distorted MgSrMg10Cr cuboctahedra that share corners with four equivalent Mg(4)Mg12 cuboctahedra; corners with fourteen Mg(3,3)SrMg10Cr cuboctahedra; edges with two equivalent Sr(1)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Cr(1)Mg12 cuboctahedra; edges with four equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with four Mg(1,1)Sr2Mg10 cuboctahedra; edges with four Mg(3,3)SrMg10Cr cuboctahedra;  a faceface with one Sr(1)Mg12 cuboctahedra;  a faceface with one Cr(1)Mg12 cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with five equivalent Mg(2)Mg10Cr2 cuboctahedra; faces with five Mg(1,1)Sr2Mg10 cuboctahedra; and faces with six Mg(3,3)SrMg10Cr cuboctahedra. In the fifth Mg site, Mg(3) is bonded to one Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), four equivalent Mg(3), and one Cr(1) atom to form distorted MgSrMg10Cr cuboctahedra that share corners with four equivalent Mg(4)Mg12 cuboctahedra; corners with fourteen Mg(3,3)SrMg10Cr cuboctahedra; edges with two equivalent Sr(1)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Cr(1)Mg12 cuboctahedra; edges with four equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with four equivalent Mg(1)Sr2Mg10 cuboctahedra; edges with four equivalent Mg(3)SrMg10Cr cuboctahedra;  a faceface with one Sr(1)Mg12 cuboctahedra;  a faceface with one Cr(1)Mg12 cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with five equivalent Mg(2)Mg10Cr2 cuboctahedra; faces with five Mg(1,1)Sr2Mg10 cuboctahedra; and faces with six Mg(3,3)SrMg10Cr cuboctahedra. In the sixth Mg site, Mg(4) is bonded to three Mg(1,1); three equivalent Mg(2); and six Mg(3,3) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(4)Mg12 cuboctahedra; corners with twelve Mg(3,3)SrMg10Cr cuboctahedra; edges with six equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with six Mg(1,1)Sr2Mg10 cuboctahedra; edges with six Mg(3,3)SrMg10Cr cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with three equivalent Sr(1)Mg12 cuboctahedra; faces with three equivalent Mg(2)Mg10Cr2 cuboctahedra; faces with three Mg(1,1)Sr2Mg10 cuboctahedra; faces with three equivalent Cr(1)Mg12 cuboctahedra; and faces with six Mg(3,3)SrMg10Cr cuboctahedra. Cr(1) is bonded to six equivalent Mg(2) and six Mg(3,3) atoms to form CrMg12 cuboctahedra that share corners with six equivalent Cr(1)Mg12 cuboctahedra; corners with twelve Mg(1,1)Sr2Mg10 cuboctahedra; edges with six equivalent Mg(2)Mg10Cr2 cuboctahedra; edges with twelve Mg(3,3)SrMg10Cr cuboctahedra; faces with two equivalent Sr(1)Mg12 cuboctahedra; faces with six equivalent Mg(2)Mg10Cr2 cuboctahedra; faces with six equivalent Mg(4)Mg12 cuboctahedra; and faces with six Mg(3,3)SrMg10Cr cuboctahedra. is represented by the CIF card [CIF]
data_SrMg14Cr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.495
_cell_length_b   6.495
_cell_length_c   10.432
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   381.136
_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  0.167  0.333  0.125  1.0
  Mg  Mg1  1  0.175  0.837  0.125  1.0
  Mg  Mg2  1  0.166  0.833  0.625  1.0
  Mg  Mg3  1  0.663  0.325  0.125  1.0
  Mg  Mg4  1  0.667  0.334  0.625  1.0
  Mg  Mg5  1  0.663  0.837  0.125  1.0
  Mg  Mg6  1  0.667  0.833  0.625  1.0
  Mg  Mg7  1  0.335  0.165  0.389  1.0
  Mg  Mg8  1  0.335  0.165  0.861  1.0
  Mg  Mg9  1  0.335  0.670  0.389  1.0
  Mg  Mg10  1  0.335  0.670  0.861  1.0
  Mg  Mg11  1  0.830  0.165  0.389  1.0
  Mg  Mg12  1  0.830  0.165  0.861  1.0
  Mg  Mg13  1  0.833  0.667  0.369  1.0
  Mg  Mg14  1  0.833  0.667  0.881  1.0
  Cr  Cr15  1  0.167  0.333  0.625  1.0
[/CIF]
.