The crystal structure described by Sr2MgCo2O5 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form distorted SrO6 octahedra that share corners with two equivalent Sr(1)O6 octahedra,  a cornercorner with one Mg(1)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra, corners with three equivalent Co(2)O4 tetrahedra,  an edgeedge with one Co(1)O4 tetrahedra,  an edgeedge with one Co(2)O4 tetrahedra, and edges with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 7°. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms. Mg(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form MgO4 tetrahedra that share  a cornercorner with one Sr(1)O6 octahedra,  a cornercorner with one Co(2)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra, edges with two equivalent Sr(1)O6 octahedra, and  an edgeedge with one Co(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 79°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form CoO4 tetrahedra that share corners with three equivalent Sr(1)O6 octahedra, corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Co(2)O4 tetrahedra, and  an edgeedge with one Sr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-87°. In the second Co site, Co(2) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form distorted CoO4 tetrahedra that share corners with three equivalent Sr(1)O6 octahedra,  a cornercorner with one Mg(1)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra,  an edgeedge with one Sr(1)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 18-86°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(2), one Mg(1), and one Co(1) atom to form distorted OSr2MgCo trigonal pyramids that share  a cornercorner with one O(4)Sr3MgCo2 octahedra,  a cornercorner with one O(2)Sr2Co2 tetrahedra, corners with four equivalent O(5)Sr2MgCo2 trigonal bipyramids, edges with two equivalent O(4)Sr3MgCo2 octahedra, and  an edgeedge with one O(2)Sr2Co2 tetrahedra. The corner-sharing octahedral tilt angles are 83°. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one Co(1), and one Co(2) atom to form distorted OSr2Co2 tetrahedra that share corners with three equivalent O(4)Sr3MgCo2 octahedra, corners with four equivalent O(5)Sr2MgCo2 trigonal bipyramids,  a cornercorner with one O(1)Sr2MgCo trigonal pyramid,  an edgeedge with one O(4)Sr3MgCo2 octahedra, and  an edgeedge with one O(1)Sr2MgCo trigonal pyramid. The corner-sharing octahedral tilt angles range from 25-79°. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Sr(1), two equivalent Sr(2), one Mg(1), and one Co(2) atom. In the fourth O site, O(4) is bonded to one Sr(2), two equivalent Sr(1), one Mg(1), one Co(1), and one Co(2) atom to form distorted OSr3MgCo2 octahedra that share corners with two equivalent O(4)Sr3MgCo2 octahedra, corners with three equivalent O(2)Sr2Co2 tetrahedra, corners with two equivalent O(5)Sr2MgCo2 trigonal bipyramids,  a cornercorner with one O(1)Sr2MgCo trigonal pyramid,  an edgeedge with one O(2)Sr2Co2 tetrahedra, edges with two equivalent O(5)Sr2MgCo2 trigonal bipyramids, and edges with two equivalent O(1)Sr2MgCo trigonal pyramids. The corner-sharing octahedral tilt angles are 7°. In the fifth O site, O(5) is bonded to one Sr(1), one Sr(2), one Mg(1), one Co(1), and one Co(2) atom to form distorted OSr2MgCo2 trigonal bipyramids that share corners with two equivalent O(4)Sr3MgCo2 octahedra, corners with four equivalent O(2)Sr2Co2 tetrahedra, corners with four equivalent O(1)Sr2MgCo trigonal pyramids, and edges with two equivalent O(4)Sr3MgCo2 octahedra. The corner-sharing octahedral tilt angles range from 42-77°. is represented by the CIF file [CIF]
data_Sr2MgCo2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.314
_cell_length_b   5.266
_cell_length_c   6.258
_cell_angle_alpha   66.787
_cell_angle_beta   44.890
_cell_angle_gamma   51.184
_symmetry_Int_Tables_number   1
_cell_volume   150.027
_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  0.145  0.570  0.469  1.0
  Sr  Sr1  1  0.680  0.434  0.647  1.0
  Mg  Mg2  1  0.584  0.832  0.138  1.0
  Co  Co3  1  0.973  0.043  0.937  1.0
  Co  Co4  1  0.241  0.237  0.005  1.0
  O  O5  1  0.621  0.179  0.117  1.0
  O  O6  1  0.206  0.639  0.003  1.0
  O  O7  1  0.627  0.890  0.770  1.0
  O  O8  1  0.177  0.038  0.448  1.0
  O  O9  1  0.919  0.410  0.061  1.0
[/CIF]
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The crystal structure described by Sr2MgCo2O5 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form distorted SrO6 octahedra that share corners with two equivalent Sr(1)O6 octahedra,  a cornercorner with one Mg(1)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra, corners with three equivalent Co(2)O4 tetrahedra,  an edgeedge with one Co(1)O4 tetrahedra,  an edgeedge with one Co(2)O4 tetrahedra, and edges with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 7°. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms. Mg(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form MgO4 tetrahedra that share  a cornercorner with one Sr(1)O6 octahedra,  a cornercorner with one Co(2)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra, edges with two equivalent Sr(1)O6 octahedra, and  an edgeedge with one Co(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 79°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form CoO4 tetrahedra that share corners with three equivalent Sr(1)O6 octahedra, corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Co(2)O4 tetrahedra, and  an edgeedge with one Sr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-87°. In the second Co site, Co(2) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form distorted CoO4 tetrahedra that share corners with three equivalent Sr(1)O6 octahedra,  a cornercorner with one Mg(1)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra,  an edgeedge with one Sr(1)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 18-86°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(2), one Mg(1), and one Co(1) atom to form distorted OSr2MgCo trigonal pyramids that share  a cornercorner with one O(4)Sr3MgCo2 octahedra,  a cornercorner with one O(2)Sr2Co2 tetrahedra, corners with four equivalent O(5)Sr2MgCo2 trigonal bipyramids, edges with two equivalent O(4)Sr3MgCo2 octahedra, and  an edgeedge with one O(2)Sr2Co2 tetrahedra. The corner-sharing octahedral tilt angles are 83°. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one Co(1), and one Co(2) atom to form distorted OSr2Co2 tetrahedra that share corners with three equivalent O(4)Sr3MgCo2 octahedra, corners with four equivalent O(5)Sr2MgCo2 trigonal bipyramids,  a cornercorner with one O(1)Sr2MgCo trigonal pyramid,  an edgeedge with one O(4)Sr3MgCo2 octahedra, and  an edgeedge with one O(1)Sr2MgCo trigonal pyramid. The corner-sharing octahedral tilt angles range from 25-79°. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Sr(1), two equivalent Sr(2), one Mg(1), and one Co(2) atom. In the fourth O site, O(4) is bonded to one Sr(2), two equivalent Sr(1), one Mg(1), one Co(1), and one Co(2) atom to form distorted OSr3MgCo2 octahedra that share corners with two equivalent O(4)Sr3MgCo2 octahedra, corners with three equivalent O(2)Sr2Co2 tetrahedra, corners with two equivalent O(5)Sr2MgCo2 trigonal bipyramids,  a cornercorner with one O(1)Sr2MgCo trigonal pyramid,  an edgeedge with one O(2)Sr2Co2 tetrahedra, edges with two equivalent O(5)Sr2MgCo2 trigonal bipyramids, and edges with two equivalent O(1)Sr2MgCo trigonal pyramids. The corner-sharing octahedral tilt angles are 7°. In the fifth O site, O(5) is bonded to one Sr(1), one Sr(2), one Mg(1), one Co(1), and one Co(2) atom to form distorted OSr2MgCo2 trigonal bipyramids that share corners with two equivalent O(4)Sr3MgCo2 octahedra, corners with four equivalent O(2)Sr2Co2 tetrahedra, corners with four equivalent O(1)Sr2MgCo trigonal pyramids, and edges with two equivalent O(4)Sr3MgCo2 octahedra. The corner-sharing octahedral tilt angles range from 42-77°. is represented by the CIF file [CIF]
data_Sr2MgCo2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.314
_cell_length_b   5.266
_cell_length_c   6.258
_cell_angle_alpha   66.787
_cell_angle_beta   44.890
_cell_angle_gamma   51.184
_symmetry_Int_Tables_number   1
_cell_volume   150.027
_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  0.145  0.570  0.469  1.0
  Sr  Sr1  1  0.680  0.434  0.647  1.0
  Mg  Mg2  1  0.584  0.832  0.138  1.0
  Co  Co3  1  0.973  0.043  0.937  1.0
  Co  Co4  1  0.241  0.237  0.005  1.0
  O  O5  1  0.621  0.179  0.117  1.0
  O  O6  1  0.206  0.639  0.003  1.0
  O  O7  1  0.627  0.890  0.770  1.0
  O  O8  1  0.177  0.038  0.448  1.0
  O  O9  1  0.919  0.410  0.061  1.0
[/CIF]
.