The crystal structure described by Sr2CoNbO6 is (Cubic) Perovskite-derived structured and crystallizes in the orthorhombic Pmn2_1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(10), one O(2), one O(3), one O(5), one O(8), two equivalent O(4), two equivalent O(7), and three equivalent O(1) 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 two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Sr(1)O12 cuboctahedra,  a faceface with one Nb(2)O6 octahedra,  a faceface with one Co(2)O6 octahedra, faces with three equivalent Nb(1)O6 octahedra, and faces with three equivalent Co(1)O6 octahedra. In the second Sr site, Sr(2) is bonded to one O(1), one O(10), one O(3), one O(5), one O(8), two equivalent O(6), two equivalent O(9), and three equivalent O(2) 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 two equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Sr(2)O12 cuboctahedra,  a faceface with one Nb(1)O6 octahedra,  a faceface with one Co(1)O6 octahedra, faces with three equivalent Nb(2)O6 octahedra, and faces with three equivalent Co(2)O6 octahedra. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(3), one O(4), one O(7), one O(8), and two equivalent O(1) atoms to form NbO6 octahedra that share corners with two equivalent Co(2)O6 octahedra, corners with four equivalent Co(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 1-2°. In the second Nb site, Nb(2) is bonded to one O(10), one O(5), one O(6), one O(9), and two equivalent O(2) atoms to form NbO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with four equivalent Co(2)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, and faces with six equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(4), one O(5), one O(7), and two equivalent O(1) atoms to form CoO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra, corners with four equivalent Nb(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 1-3°. In the second Co site, Co(2) is bonded to one O(3), one O(6), one O(8), one O(9), and two equivalent O(2) atoms to form CoO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra, corners with four equivalent Nb(2)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, and faces with six equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Sr(2), three equivalent Sr(1), one Nb(1), and one Co(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Sr(1), three equivalent Sr(2), one Nb(2), and one Co(2) atom. In the third O site, O(3) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Nb(1), and one Co(2) atom to form a mixture of distorted face, corner, and edge-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 1-59°. In the fourth O site, O(4) is bonded in a distorted linear geometry to four equivalent Sr(1), one Nb(1), and one Co(1) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent Sr(2), one Nb(2), and one Co(1) atom. In the sixth O site, O(6) is bonded to four equivalent Sr(2), one Nb(2), and one Co(2) atom to form a mixture of distorted face, corner, and edge-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 1-61°. In the seventh O site, O(7) is bonded in a distorted linear geometry to four equivalent Sr(1), one Nb(1), and one Co(1) atom. In the eighth O site, O(8) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Nb(1), and one Co(2) atom to form a mixture of distorted face, corner, and edge-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 1-61°. In the ninth O site, O(9) is bonded to four equivalent Sr(2), one Nb(2), and one Co(2) atom to form a mixture of distorted face, corner, and edge-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 1-59°. In the tenth O site, O(10) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent Sr(2), one Nb(2), and one Co(1) atom. is represented by the CIF file [CIF]
data_Sr2NbCoO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.659
_cell_length_b   5.660
_cell_length_c   5.660
_cell_angle_alpha   119.699
_cell_angle_beta   90.478
_cell_angle_gamma   119.745
_symmetry_Int_Tables_number   1
_cell_volume   128.718
_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
  Co  Co0  1  0.750  0.498  0.248  1.0
  Nb  Nb1  1  0.250  0.498  0.748  1.0
  O  O2  1  0.502  0.502  0.004  1.0
  O  O3  1  0.998  0.502  0.500  1.0
  O  O4  1  0.001  0.002  0.501  1.0
  O  O5  1  0.500  1.000  1.000  1.0
  O  O6  1  0.000  0.500  0.000  1.0
  O  O7  1  0.500  0.501  0.501  1.0
  Sr  Sr8  1  0.000  0.998  0.998  1.0
  Sr  Sr9  1  0.500  0.998  0.498  1.0
[/CIF]
.
The crystal structure described by Sr2CoNbO6 is (Cubic) Perovskite-derived structured and crystallizes in the orthorhombic Pmn2_1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(10), one O(2), one O(3), one O(5), one O(8), two equivalent O(4), two equivalent O(7), and three equivalent O(1) 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 two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Sr(1)O12 cuboctahedra,  a faceface with one Nb(2)O6 octahedra,  a faceface with one Co(2)O6 octahedra, faces with three equivalent Nb(1)O6 octahedra, and faces with three equivalent Co(1)O6 octahedra. In the second Sr site, Sr(2) is bonded to one O(1), one O(10), one O(3), one O(5), one O(8), two equivalent O(6), two equivalent O(9), and three equivalent O(2) 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 two equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Sr(2)O12 cuboctahedra,  a faceface with one Nb(1)O6 octahedra,  a faceface with one Co(1)O6 octahedra, faces with three equivalent Nb(2)O6 octahedra, and faces with three equivalent Co(2)O6 octahedra. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(3), one O(4), one O(7), one O(8), and two equivalent O(1) atoms to form NbO6 octahedra that share corners with two equivalent Co(2)O6 octahedra, corners with four equivalent Co(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 1-2°. In the second Nb site, Nb(2) is bonded to one O(10), one O(5), one O(6), one O(9), and two equivalent O(2) atoms to form NbO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with four equivalent Co(2)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, and faces with six equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(4), one O(5), one O(7), and two equivalent O(1) atoms to form CoO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra, corners with four equivalent Nb(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 1-3°. In the second Co site, Co(2) is bonded to one O(3), one O(6), one O(8), one O(9), and two equivalent O(2) atoms to form CoO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra, corners with four equivalent Nb(2)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, and faces with six equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Sr(2), three equivalent Sr(1), one Nb(1), and one Co(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Sr(1), three equivalent Sr(2), one Nb(2), and one Co(2) atom. In the third O site, O(3) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Nb(1), and one Co(2) atom to form a mixture of distorted face, corner, and edge-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 1-59°. In the fourth O site, O(4) is bonded in a distorted linear geometry to four equivalent Sr(1), one Nb(1), and one Co(1) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent Sr(2), one Nb(2), and one Co(1) atom. In the sixth O site, O(6) is bonded to four equivalent Sr(2), one Nb(2), and one Co(2) atom to form a mixture of distorted face, corner, and edge-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 1-61°. In the seventh O site, O(7) is bonded in a distorted linear geometry to four equivalent Sr(1), one Nb(1), and one Co(1) atom. In the eighth O site, O(8) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Nb(1), and one Co(2) atom to form a mixture of distorted face, corner, and edge-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 1-61°. In the ninth O site, O(9) is bonded to four equivalent Sr(2), one Nb(2), and one Co(2) atom to form a mixture of distorted face, corner, and edge-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 1-59°. In the tenth O site, O(10) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent Sr(2), one Nb(2), and one Co(1) atom. is represented by the CIF file [CIF]
data_Sr2NbCoO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.659
_cell_length_b   5.660
_cell_length_c   5.660
_cell_angle_alpha   119.699
_cell_angle_beta   90.478
_cell_angle_gamma   119.745
_symmetry_Int_Tables_number   1
_cell_volume   128.718
_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
  Co  Co0  1  0.750  0.498  0.248  1.0
  Nb  Nb1  1  0.250  0.498  0.748  1.0
  O  O2  1  0.502  0.502  0.004  1.0
  O  O3  1  0.998  0.502  0.500  1.0
  O  O4  1  0.001  0.002  0.501  1.0
  O  O5  1  0.500  1.000  1.000  1.0
  O  O6  1  0.000  0.500  0.000  1.0
  O  O7  1  0.500  0.501  0.501  1.0
  Sr  Sr8  1  0.000  0.998  0.998  1.0
  Sr  Sr9  1  0.500  0.998  0.498  1.0
[/CIF]
.