The crystal structure described by Sr4Mg(Co2O5)2 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(6), one O(7), and one O(8) atom. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(3), one O(4), one O(6), and one O(8) atom. In the third Sr site, Sr(3) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(5), one O(6), one O(7), and one O(8) atom. In the fourth Sr site, Sr(4) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(4), one O(6), one O(8), and one O(9) atom. Mg(1) is bonded to one O(1), one O(5), one O(7), and one O(9) atom to form MgO4 trigonal pyramids that share corners with two equivalent Co(3)O4 tetrahedra,  a cornercorner with one Co(2)O5 trigonal bipyramid, and  an edgeedge with one Co(1)O4 tetrahedra. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(3), one O(4), and one O(9) atom to form CoO4 tetrahedra that share corners with two equivalent Co(3)O4 tetrahedra,  a cornercorner with one Co(2)O5 trigonal bipyramid, and  an edgeedge with one Mg(1)O4 trigonal pyramid. In the second Co site, Co(2) is bonded to one O(10), one O(4), one O(5), one O(6), and one O(8) atom to form CoO5 trigonal bipyramids that share  a cornercorner with one Co(1)O4 tetrahedra and  a cornercorner with one Mg(1)O4 trigonal pyramid. In the third Co site, Co(3) is bonded to one O(2), one O(3), one O(7), and one O(9) atom to form distorted CoO4 tetrahedra that share corners with two equivalent Co(1)O4 tetrahedra and corners with two equivalent Mg(1)O4 trigonal pyramids. In the fourth Co site, Co(4) is bonded in a rectangular see-saw-like geometry to one O(10), one O(2), one O(5), and one O(6) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Sr(1), one Sr(3), one Mg(1), and one Co(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Co(3), and one Co(4) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Sr(2), one Co(1), and one Co(3) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Sr(2), one Sr(4), one Co(1), and one Co(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(3), one Mg(1), one Co(2), and one Co(4) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(2), one Sr(3), one Sr(4), one Co(2), and one Co(4) atom to form OSr4Co2 octahedra that share  a cornercorner with one O(8)Sr4Co square pyramid, edges with two equivalent O(8)Sr4Co square pyramids, and faces with two equivalent O(10)Sr4Co2 octahedra. In the seventh O site, O(7) is bonded in a distorted see-saw-like geometry to one Sr(1), one Sr(3), one Mg(1), and one Co(3) atom. In the eighth O site, O(8) is bonded to one Sr(1), one Sr(2), one Sr(3), one Sr(4), and one Co(2) atom to form a mixture of distorted face, corner, and edge-sharing OSr4Co square pyramids. The corner-sharing octahedral tilt angles are 9°. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Sr(4), one Mg(1), one Co(1), and one Co(3) atom. In the tenth O site, O(10) is bonded to one Sr(1), one Sr(2), one Sr(3), one Sr(4), one Co(2), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  an edgeedge with one O(8)Sr4Co square pyramid, faces with two equivalent O(6)Sr4Co2 octahedra, and  a faceface with one O(8)Sr4Co square pyramid. is represented by the CIF file [CIF]
data_Sr4Mg(Co2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.828
_cell_length_b   5.875
_cell_length_c   10.290
_cell_angle_alpha   115.936
_cell_angle_beta   115.799
_cell_angle_gamma   78.802
_symmetry_Int_Tables_number   1
_cell_volume   285.255
_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  0.579  0.088  0.173  1.0
  Sr  Sr1  1  0.889  0.419  0.763  1.0
  Sr  Sr2  1  0.160  0.686  0.166  1.0
  Sr  Sr3  1  0.330  0.821  0.771  1.0
  Mg  Mg4  1  0.956  0.476  0.321  1.0
  Co  Co5  1  0.747  0.820  0.516  1.0
  Co  Co6  1  0.964  0.028  0.960  1.0
  Co  Co7  1  0.254  0.117  0.520  1.0
  Co  Co8  1  0.490  0.444  0.962  1.0
  O  O9  1  0.606  0.559  0.327  1.0
  O  O10  1  0.322  0.345  0.722  1.0
  O  O11  1  0.573  0.118  0.502  1.0
  O  O12  1  0.851  0.829  0.710  1.0
  O  O13  1  0.844  0.369  0.090  1.0
  O  O14  1  0.246  0.244  0.964  1.0
  O  O15  1  0.046  0.147  0.336  1.0
  O  O16  1  0.759  0.801  0.965  1.0
  O  O17  1  0.099  0.809  0.490  1.0
  O  O18  1  0.274  0.761  0.992  1.0
[/CIF]
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The crystal structure described by Sr4Mg(Co2O5)2 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(6), one O(7), and one O(8) atom. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(3), one O(4), one O(6), and one O(8) atom. In the third Sr site, Sr(3) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(5), one O(6), one O(7), and one O(8) atom. In the fourth Sr site, Sr(4) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(4), one O(6), one O(8), and one O(9) atom. Mg(1) is bonded to one O(1), one O(5), one O(7), and one O(9) atom to form MgO4 trigonal pyramids that share corners with two equivalent Co(3)O4 tetrahedra,  a cornercorner with one Co(2)O5 trigonal bipyramid, and  an edgeedge with one Co(1)O4 tetrahedra. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(3), one O(4), and one O(9) atom to form CoO4 tetrahedra that share corners with two equivalent Co(3)O4 tetrahedra,  a cornercorner with one Co(2)O5 trigonal bipyramid, and  an edgeedge with one Mg(1)O4 trigonal pyramid. In the second Co site, Co(2) is bonded to one O(10), one O(4), one O(5), one O(6), and one O(8) atom to form CoO5 trigonal bipyramids that share  a cornercorner with one Co(1)O4 tetrahedra and  a cornercorner with one Mg(1)O4 trigonal pyramid. In the third Co site, Co(3) is bonded to one O(2), one O(3), one O(7), and one O(9) atom to form distorted CoO4 tetrahedra that share corners with two equivalent Co(1)O4 tetrahedra and corners with two equivalent Mg(1)O4 trigonal pyramids. In the fourth Co site, Co(4) is bonded in a rectangular see-saw-like geometry to one O(10), one O(2), one O(5), and one O(6) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Sr(1), one Sr(3), one Mg(1), and one Co(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Co(3), and one Co(4) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Sr(2), one Co(1), and one Co(3) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Sr(2), one Sr(4), one Co(1), and one Co(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(3), one Mg(1), one Co(2), and one Co(4) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(2), one Sr(3), one Sr(4), one Co(2), and one Co(4) atom to form OSr4Co2 octahedra that share  a cornercorner with one O(8)Sr4Co square pyramid, edges with two equivalent O(8)Sr4Co square pyramids, and faces with two equivalent O(10)Sr4Co2 octahedra. In the seventh O site, O(7) is bonded in a distorted see-saw-like geometry to one Sr(1), one Sr(3), one Mg(1), and one Co(3) atom. In the eighth O site, O(8) is bonded to one Sr(1), one Sr(2), one Sr(3), one Sr(4), and one Co(2) atom to form a mixture of distorted face, corner, and edge-sharing OSr4Co square pyramids. The corner-sharing octahedral tilt angles are 9°. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Sr(4), one Mg(1), one Co(1), and one Co(3) atom. In the tenth O site, O(10) is bonded to one Sr(1), one Sr(2), one Sr(3), one Sr(4), one Co(2), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  an edgeedge with one O(8)Sr4Co square pyramid, faces with two equivalent O(6)Sr4Co2 octahedra, and  a faceface with one O(8)Sr4Co square pyramid. is represented by the CIF file [CIF]
data_Sr4Mg(Co2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.828
_cell_length_b   5.875
_cell_length_c   10.290
_cell_angle_alpha   115.936
_cell_angle_beta   115.799
_cell_angle_gamma   78.802
_symmetry_Int_Tables_number   1
_cell_volume   285.255
_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  0.579  0.088  0.173  1.0
  Sr  Sr1  1  0.889  0.419  0.763  1.0
  Sr  Sr2  1  0.160  0.686  0.166  1.0
  Sr  Sr3  1  0.330  0.821  0.771  1.0
  Mg  Mg4  1  0.956  0.476  0.321  1.0
  Co  Co5  1  0.747  0.820  0.516  1.0
  Co  Co6  1  0.964  0.028  0.960  1.0
  Co  Co7  1  0.254  0.117  0.520  1.0
  Co  Co8  1  0.490  0.444  0.962  1.0
  O  O9  1  0.606  0.559  0.327  1.0
  O  O10  1  0.322  0.345  0.722  1.0
  O  O11  1  0.573  0.118  0.502  1.0
  O  O12  1  0.851  0.829  0.710  1.0
  O  O13  1  0.844  0.369  0.090  1.0
  O  O14  1  0.246  0.244  0.964  1.0
  O  O15  1  0.046  0.147  0.336  1.0
  O  O16  1  0.759  0.801  0.965  1.0
  O  O17  1  0.099  0.809  0.490  1.0
  O  O18  1  0.274  0.761  0.992  1.0
[/CIF]
.