The material described by SrMg14Cr crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded to two equivalent Mg(6), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Cr(1) atoms to form SrMg10Cr2 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Sr(1)Mg10Cr2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Cr(1)Sr2Mg10 cuboctahedra, edges with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with four equivalent Mg(6)SrMg11 cuboctahedra, edges with eight equivalent Mg(5)SrMg10Cr cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(6)SrMg11 cuboctahedra, faces with two equivalent Cr(1)Sr2Mg10 cuboctahedra, faces with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, and faces with four equivalent Mg(5)SrMg10Cr cuboctahedra. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2), two equivalent Mg(6), four equivalent Mg(4), and four equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Cr(1)Sr2Mg10 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(6)SrMg11 cuboctahedra, edges with eight equivalent Mg(5)SrMg10Cr cuboctahedra, faces with two equivalent Sr(1)Mg10Cr2 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(6)SrMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with four equivalent Mg(5)SrMg10Cr cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(7), four equivalent Mg(4), and four equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Sr(1)Mg10Cr2 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)SrMg10Cr cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Cr(1)Sr2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)SrMg10Cr cuboctahedra, and faces with six equivalent Mg(6)SrMg11 cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Sr(1), two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and two equivalent Cr(1) atoms to form distorted MgSr2Mg8Cr2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with four equivalent Mg(4)Mg12 cuboctahedra, corners with six equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with two equivalent Sr(1)Mg10Cr2 cuboctahedra, edges with two equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with two equivalent Cr(1)Sr2Mg10 cuboctahedra, edges with four equivalent Mg(5)SrMg10Cr cuboctahedra, edges with four equivalent Mg(6)SrMg11 cuboctahedra, faces with two equivalent Sr(1)Mg10Cr2 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, faces with two equivalent Mg(6)SrMg11 cuboctahedra, faces with two equivalent Cr(1)Sr2Mg10 cuboctahedra, and faces with eight equivalent Mg(5)SrMg10Cr cuboctahedra. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Sr(1)Mg10Cr2 cuboctahedra, corners with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, corners with four equivalent Cr(1)Sr2Mg10 cuboctahedra, corners with six equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(5)SrMg10Cr cuboctahedra, edges with four equivalent Mg(6)SrMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, faces with two equivalent Mg(6)SrMg11 cuboctahedra, and faces with eight equivalent Mg(5)SrMg10Cr cuboctahedra. In the fifth Mg site, Mg(5) is bonded to one Sr(1), one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and one Cr(1) atom to form distorted MgSrMg10Cr cuboctahedra that share corners with four equivalent Mg(6)SrMg11 cuboctahedra, corners with ten equivalent Mg(5)SrMg10Cr cuboctahedra, edges with two equivalent Sr(1)Mg10Cr2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with two equivalent Mg(5)SrMg10Cr cuboctahedra, edges with two equivalent Mg(6)SrMg11 cuboctahedra, edges with two equivalent Cr(1)Sr2Mg10 cuboctahedra,  a faceface with one Sr(1)Mg10Cr2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Cr(1)Sr2Mg10 cuboctahedra, faces with two equivalent Mg(6)SrMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, and faces with four equivalent Mg(5)SrMg10Cr cuboctahedra. In the sixth Mg site, Mg(6) is bonded to one Sr(1), one Mg(1), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(7), and four equivalent Mg(5) atoms to form distorted MgSrMg11 cuboctahedra that share corners with six equivalent Mg(6)SrMg11 cuboctahedra, corners with eight equivalent Mg(5)SrMg10Cr cuboctahedra, edges with two equivalent Sr(1)Mg10Cr2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with four equivalent Mg(5)SrMg10Cr cuboctahedra,  a faceface with one Sr(1)Mg10Cr2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, faces with two equivalent Mg(6)SrMg11 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, faces with three equivalent Cr(1)Sr2Mg10 cuboctahedra, and faces with four equivalent Mg(5)SrMg10Cr cuboctahedra. In the seventh Mg site, Mg(7) is bonded in a distorted single-bond geometry to one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), four equivalent Mg(5), and one Cr(1) atom. Cr(1) is bonded to two equivalent Sr(1), two equivalent Mg(7), four equivalent Mg(3), and four equivalent Mg(5) atoms to form CrSr2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Cr(1)Sr2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Sr(1)Mg10Cr2 cuboctahedra, edges with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with eight equivalent Mg(5)SrMg10Cr cuboctahedra, faces with two equivalent Sr(1)Mg10Cr2 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, faces with four equivalent Mg(5)SrMg10Cr cuboctahedra, and faces with six equivalent Mg(6)SrMg11 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrMg14Cr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.520
_cell_length_b   6.472
_cell_length_c   10.474
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.757
_symmetry_Int_Tables_number   1
_cell_volume   383.747
_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  0.163  0.331  0.125  1.0
  Mg  Mg1  1  0.168  0.334  0.625  1.0
  Mg  Mg2  1  0.164  0.832  0.625  1.0
  Mg  Mg3  1  0.658  0.321  0.125  1.0
  Mg  Mg4  1  0.666  0.335  0.625  1.0
  Mg  Mg5  1  0.658  0.837  0.125  1.0
  Mg  Mg6  1  0.666  0.831  0.625  1.0
  Mg  Mg7  1  0.337  0.159  0.383  1.0
  Mg  Mg8  1  0.337  0.159  0.867  1.0
  Mg  Mg9  1  0.337  0.678  0.383  1.0
  Mg  Mg10  1  0.337  0.678  0.867  1.0
  Mg  Mg11  1  0.826  0.163  0.389  1.0
  Mg  Mg12  1  0.826  0.163  0.861  1.0
  Mg  Mg13  1  0.841  0.670  0.364  1.0
  Mg  Mg14  1  0.841  0.670  0.886  1.0
  Cr  Cr15  1  0.174  0.837  0.125  1.0
[/CIF]
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The material described by SrMg14Cr crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded to two equivalent Mg(6), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Cr(1) atoms to form SrMg10Cr2 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Sr(1)Mg10Cr2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Cr(1)Sr2Mg10 cuboctahedra, edges with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with four equivalent Mg(6)SrMg11 cuboctahedra, edges with eight equivalent Mg(5)SrMg10Cr cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(6)SrMg11 cuboctahedra, faces with two equivalent Cr(1)Sr2Mg10 cuboctahedra, faces with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, and faces with four equivalent Mg(5)SrMg10Cr cuboctahedra. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2), two equivalent Mg(6), four equivalent Mg(4), and four equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Cr(1)Sr2Mg10 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(6)SrMg11 cuboctahedra, edges with eight equivalent Mg(5)SrMg10Cr cuboctahedra, faces with two equivalent Sr(1)Mg10Cr2 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(6)SrMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with four equivalent Mg(5)SrMg10Cr cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(7), four equivalent Mg(4), and four equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Sr(1)Mg10Cr2 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)SrMg10Cr cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Cr(1)Sr2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)SrMg10Cr cuboctahedra, and faces with six equivalent Mg(6)SrMg11 cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Sr(1), two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and two equivalent Cr(1) atoms to form distorted MgSr2Mg8Cr2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with four equivalent Mg(4)Mg12 cuboctahedra, corners with six equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with two equivalent Sr(1)Mg10Cr2 cuboctahedra, edges with two equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with two equivalent Cr(1)Sr2Mg10 cuboctahedra, edges with four equivalent Mg(5)SrMg10Cr cuboctahedra, edges with four equivalent Mg(6)SrMg11 cuboctahedra, faces with two equivalent Sr(1)Mg10Cr2 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, faces with two equivalent Mg(6)SrMg11 cuboctahedra, faces with two equivalent Cr(1)Sr2Mg10 cuboctahedra, and faces with eight equivalent Mg(5)SrMg10Cr cuboctahedra. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Sr(1)Mg10Cr2 cuboctahedra, corners with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, corners with four equivalent Cr(1)Sr2Mg10 cuboctahedra, corners with six equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(5)SrMg10Cr cuboctahedra, edges with four equivalent Mg(6)SrMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, faces with two equivalent Mg(6)SrMg11 cuboctahedra, and faces with eight equivalent Mg(5)SrMg10Cr cuboctahedra. In the fifth Mg site, Mg(5) is bonded to one Sr(1), one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and one Cr(1) atom to form distorted MgSrMg10Cr cuboctahedra that share corners with four equivalent Mg(6)SrMg11 cuboctahedra, corners with ten equivalent Mg(5)SrMg10Cr cuboctahedra, edges with two equivalent Sr(1)Mg10Cr2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with two equivalent Mg(5)SrMg10Cr cuboctahedra, edges with two equivalent Mg(6)SrMg11 cuboctahedra, edges with two equivalent Cr(1)Sr2Mg10 cuboctahedra,  a faceface with one Sr(1)Mg10Cr2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Cr(1)Sr2Mg10 cuboctahedra, faces with two equivalent Mg(6)SrMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, and faces with four equivalent Mg(5)SrMg10Cr cuboctahedra. In the sixth Mg site, Mg(6) is bonded to one Sr(1), one Mg(1), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(7), and four equivalent Mg(5) atoms to form distorted MgSrMg11 cuboctahedra that share corners with six equivalent Mg(6)SrMg11 cuboctahedra, corners with eight equivalent Mg(5)SrMg10Cr cuboctahedra, edges with two equivalent Sr(1)Mg10Cr2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with four equivalent Mg(5)SrMg10Cr cuboctahedra,  a faceface with one Sr(1)Mg10Cr2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, faces with two equivalent Mg(6)SrMg11 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, faces with three equivalent Cr(1)Sr2Mg10 cuboctahedra, and faces with four equivalent Mg(5)SrMg10Cr cuboctahedra. In the seventh Mg site, Mg(7) is bonded in a distorted single-bond geometry to one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), four equivalent Mg(5), and one Cr(1) atom. Cr(1) is bonded to two equivalent Sr(1), two equivalent Mg(7), four equivalent Mg(3), and four equivalent Mg(5) atoms to form CrSr2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Cr(1)Sr2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Sr(1)Mg10Cr2 cuboctahedra, edges with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, edges with eight equivalent Mg(5)SrMg10Cr cuboctahedra, faces with two equivalent Sr(1)Mg10Cr2 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with four equivalent Mg(3)Sr2Mg8Cr2 cuboctahedra, faces with four equivalent Mg(5)SrMg10Cr cuboctahedra, and faces with six equivalent Mg(6)SrMg11 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrMg14Cr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.520
_cell_length_b   6.472
_cell_length_c   10.474
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.757
_symmetry_Int_Tables_number   1
_cell_volume   383.747
_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  0.163  0.331  0.125  1.0
  Mg  Mg1  1  0.168  0.334  0.625  1.0
  Mg  Mg2  1  0.164  0.832  0.625  1.0
  Mg  Mg3  1  0.658  0.321  0.125  1.0
  Mg  Mg4  1  0.666  0.335  0.625  1.0
  Mg  Mg5  1  0.658  0.837  0.125  1.0
  Mg  Mg6  1  0.666  0.831  0.625  1.0
  Mg  Mg7  1  0.337  0.159  0.383  1.0
  Mg  Mg8  1  0.337  0.159  0.867  1.0
  Mg  Mg9  1  0.337  0.678  0.383  1.0
  Mg  Mg10  1  0.337  0.678  0.867  1.0
  Mg  Mg11  1  0.826  0.163  0.389  1.0
  Mg  Mg12  1  0.826  0.163  0.861  1.0
  Mg  Mg13  1  0.841  0.670  0.364  1.0
  Mg  Mg14  1  0.841  0.670  0.886  1.0
  Cr  Cr15  1  0.174  0.837  0.125  1.0
[/CIF]
.