The compound described by Sr2HfCrO6 is (Cubic) Perovskite-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(1), two equivalent O(3), three equivalent O(2), and six equivalent O(4) atoms to form SrO12 cuboctahedra that share corners with six equivalent Sr(1)O12 cuboctahedra, corners with six equivalent Sr(2)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, faces with three equivalent Sr(2)O12 cuboctahedra,  a faceface with one Cr(2)O6 octahedra, faces with three equivalent Cr(1)O6 octahedra, and faces with four equivalent Hf(1)O6 octahedra. In the second Sr site, Sr(2) is bonded to one O(2), two equivalent O(4), three equivalent O(1), and six equivalent O(3) atoms to form SrO12 cuboctahedra that share corners with six equivalent Sr(1)O12 cuboctahedra, corners with six equivalent Sr(2)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, faces with three equivalent Sr(2)O12 cuboctahedra,  a faceface with one Cr(1)O6 octahedra, faces with three equivalent Cr(2)O6 octahedra, and faces with four equivalent Hf(1)O6 octahedra. Hf(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form HfO6 octahedra that share corners with three equivalent Cr(1)O6 octahedra, corners with three equivalent Cr(2)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(2) and four equivalent O(4) atoms to form CrO6 octahedra that share corners with six equivalent Hf(1)O6 octahedra, faces with two equivalent Sr(2)O12 cuboctahedra, and faces with six equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Cr site, Cr(2) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form CrO6 octahedra that share corners with six equivalent Hf(1)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, and faces with six equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Sr(1), three equivalent Sr(2), one Hf(1), and one Cr(2) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Sr(2), three equivalent Sr(1), one Hf(1), and one Cr(1) atom. In the third O site, O(3) is bonded in a distorted linear geometry to one Sr(1), three equivalent Sr(2), one Hf(1), and one Cr(2) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Sr(2), three equivalent Sr(1), one Hf(1), and one Cr(1) atom. is represented by the CIF file [CIF]
data_Sr2HfCrO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.639
_cell_length_b   5.643
_cell_length_c   5.667
_cell_angle_alpha   119.736
_cell_angle_beta   119.816
_cell_angle_gamma   90.045
_symmetry_Int_Tables_number   1
_cell_volume   128.302
_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
  Cr  Cr0  1  1.000  1.000  1.000  1.0
  Hf  Hf1  1  0.500  0.500  0.000  1.0
  O  O2  1  0.245  0.245  0.489  1.0
  O  O3  1  0.755  0.755  0.511  1.0
  O  O4  1  0.759  0.242  0.001  1.0
  O  O5  1  0.241  0.758  0.999  1.0
  O  O6  1  0.241  0.242  0.001  1.0
  O  O7  1  0.759  0.759  0.999  1.0
  Sr  Sr8  1  0.250  0.750  0.500  1.0
  Sr  Sr9  1  0.750  0.251  0.500  1.0
[/CIF]
.
The compound described by Sr2HfCrO6 is (Cubic) Perovskite-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(1), two equivalent O(3), three equivalent O(2), and six equivalent O(4) atoms to form SrO12 cuboctahedra that share corners with six equivalent Sr(1)O12 cuboctahedra, corners with six equivalent Sr(2)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, faces with three equivalent Sr(2)O12 cuboctahedra,  a faceface with one Cr(2)O6 octahedra, faces with three equivalent Cr(1)O6 octahedra, and faces with four equivalent Hf(1)O6 octahedra. In the second Sr site, Sr(2) is bonded to one O(2), two equivalent O(4), three equivalent O(1), and six equivalent O(3) atoms to form SrO12 cuboctahedra that share corners with six equivalent Sr(1)O12 cuboctahedra, corners with six equivalent Sr(2)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, faces with three equivalent Sr(2)O12 cuboctahedra,  a faceface with one Cr(1)O6 octahedra, faces with three equivalent Cr(2)O6 octahedra, and faces with four equivalent Hf(1)O6 octahedra. Hf(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form HfO6 octahedra that share corners with three equivalent Cr(1)O6 octahedra, corners with three equivalent Cr(2)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(2) and four equivalent O(4) atoms to form CrO6 octahedra that share corners with six equivalent Hf(1)O6 octahedra, faces with two equivalent Sr(2)O12 cuboctahedra, and faces with six equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Cr site, Cr(2) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form CrO6 octahedra that share corners with six equivalent Hf(1)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, and faces with six equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Sr(1), three equivalent Sr(2), one Hf(1), and one Cr(2) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Sr(2), three equivalent Sr(1), one Hf(1), and one Cr(1) atom. In the third O site, O(3) is bonded in a distorted linear geometry to one Sr(1), three equivalent Sr(2), one Hf(1), and one Cr(2) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Sr(2), three equivalent Sr(1), one Hf(1), and one Cr(1) atom. is represented by the CIF file [CIF]
data_Sr2HfCrO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.639
_cell_length_b   5.643
_cell_length_c   5.667
_cell_angle_alpha   119.736
_cell_angle_beta   119.816
_cell_angle_gamma   90.045
_symmetry_Int_Tables_number   1
_cell_volume   128.302
_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
  Cr  Cr0  1  1.000  1.000  1.000  1.0
  Hf  Hf1  1  0.500  0.500  0.000  1.0
  O  O2  1  0.245  0.245  0.489  1.0
  O  O3  1  0.755  0.755  0.511  1.0
  O  O4  1  0.759  0.242  0.001  1.0
  O  O5  1  0.241  0.758  0.999  1.0
  O  O6  1  0.241  0.242  0.001  1.0
  O  O7  1  0.759  0.759  0.999  1.0
  Sr  Sr8  1  0.250  0.750  0.500  1.0
  Sr  Sr9  1  0.750  0.251  0.500  1.0
[/CIF]
.